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OpenCloudOS-Kernel/drivers/pinctrl/pinctrl-tz1090.c

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/*
* Pinctrl driver for the Toumaz Xenif TZ1090 SoC
*
* Copyright (c) 2013, Imagination Technologies Ltd.
*
* Derived from Tegra code:
* Copyright (c) 2011-2012, NVIDIA CORPORATION. All rights reserved.
*
* Derived from code:
* Copyright (C) 2010 Google, Inc.
* Copyright (C) 2010 NVIDIA Corporation
* Copyright (C) 2009-2011 ST-Ericsson AB
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*/
#include <linux/bitops.h>
#include <linux/io.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/pinctrl/machine.h>
#include <linux/pinctrl/pinconf-generic.h>
#include <linux/pinctrl/pinctrl.h>
#include <linux/pinctrl/pinmux.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
/*
* The registers may be shared with other threads/cores, so we need to use the
* metag global lock2 for atomicity.
*/
#include <asm/global_lock.h>
#include "core.h"
#include "pinconf.h"
/* Register offsets from bank base address */
#define REG_PINCTRL_SELECT 0x10
#define REG_PINCTRL_SCHMITT 0x90
#define REG_PINCTRL_PU_PD 0xa0
#define REG_PINCTRL_SR 0xc0
#define REG_PINCTRL_DR 0xd0
#define REG_PINCTRL_IF_CTL 0xe0
/* REG_PINCTRL_PU_PD field values */
#define REG_PU_PD_TRISTATE 0
#define REG_PU_PD_UP 1
#define REG_PU_PD_DOWN 2
#define REG_PU_PD_REPEATER 3
/* REG_PINCTRL_DR field values */
#define REG_DR_2mA 0
#define REG_DR_4mA 1
#define REG_DR_8mA 2
#define REG_DR_12mA 3
/**
* struct tz1090_function - TZ1090 pinctrl mux function
* @name: The name of the function, exported to pinctrl core.
* @groups: An array of pin groups that may select this function.
* @ngroups: The number of entries in @groups.
*/
struct tz1090_function {
const char *name;
const char * const *groups;
unsigned int ngroups;
};
/**
* struct tz1090_muxdesc - TZ1090 individual mux description
* @funcs: Function for each mux value.
* @reg: Mux register offset. 0 if unsupported.
* @bit: Mux register bit. 0 if unsupported.
* @width: Mux field width. 0 if unsupported.
*
* A representation of a group of signals (possibly just one signal) in the
* TZ1090 which can be muxed to a set of functions or sub muxes.
*/
struct tz1090_muxdesc {
int funcs[5];
u16 reg;
u8 bit;
u8 width;
};
/**
* struct tz1090_pingroup - TZ1090 pin group
* @name: Name of pin group.
* @pins: Array of pin numbers in this pin group.
* @npins: Number of pins in this pin group.
* @mux: Top level mux.
* @drv: Drive control supported, 0 if unsupported.
* This means Schmitt, Slew, and Drive strength.
* @slw_bit: Slew register bit. 0 if unsupported.
* The same bit is used for Schmitt, and Drive (*2).
* @func: Currently muxed function.
* @func_count: Number of pins using current mux function.
*
* A representation of a group of pins (possibly just one pin) in the TZ1090
* pin controller. Each group allows some parameter or parameters to be
* configured. The most common is mux function selection.
*/
struct tz1090_pingroup {
const char *name;
const unsigned int *pins;
unsigned int npins;
struct tz1090_muxdesc mux;
bool drv;
u8 slw_bit;
int func;
unsigned int func_count;
};
/*
* Most pins affected by the pinmux can also be GPIOs. Define these first.
* These must match how the GPIO driver names/numbers its pins.
*/
enum tz1090_pin {
/* GPIO pins */
TZ1090_PIN_SDIO_CLK,
TZ1090_PIN_SDIO_CMD,
TZ1090_PIN_SDIO_D0,
TZ1090_PIN_SDIO_D1,
TZ1090_PIN_SDIO_D2,
TZ1090_PIN_SDIO_D3,
TZ1090_PIN_SDH_CD,
TZ1090_PIN_SDH_WP,
TZ1090_PIN_SPI0_MCLK,
TZ1090_PIN_SPI0_CS0,
TZ1090_PIN_SPI0_CS1,
TZ1090_PIN_SPI0_CS2,
TZ1090_PIN_SPI0_DOUT,
TZ1090_PIN_SPI0_DIN,
TZ1090_PIN_SPI1_MCLK,
TZ1090_PIN_SPI1_CS0,
TZ1090_PIN_SPI1_CS1,
TZ1090_PIN_SPI1_CS2,
TZ1090_PIN_SPI1_DOUT,
TZ1090_PIN_SPI1_DIN,
TZ1090_PIN_UART0_RXD,
TZ1090_PIN_UART0_TXD,
TZ1090_PIN_UART0_CTS,
TZ1090_PIN_UART0_RTS,
TZ1090_PIN_UART1_RXD,
TZ1090_PIN_UART1_TXD,
TZ1090_PIN_SCB0_SDAT,
TZ1090_PIN_SCB0_SCLK,
TZ1090_PIN_SCB1_SDAT,
TZ1090_PIN_SCB1_SCLK,
TZ1090_PIN_SCB2_SDAT,
TZ1090_PIN_SCB2_SCLK,
TZ1090_PIN_I2S_MCLK,
TZ1090_PIN_I2S_BCLK_OUT,
TZ1090_PIN_I2S_LRCLK_OUT,
TZ1090_PIN_I2S_DOUT0,
TZ1090_PIN_I2S_DOUT1,
TZ1090_PIN_I2S_DOUT2,
TZ1090_PIN_I2S_DIN,
TZ1090_PIN_PDM_A,
TZ1090_PIN_PDM_B,
TZ1090_PIN_PDM_C,
TZ1090_PIN_PDM_D,
TZ1090_PIN_TFT_RED0,
TZ1090_PIN_TFT_RED1,
TZ1090_PIN_TFT_RED2,
TZ1090_PIN_TFT_RED3,
TZ1090_PIN_TFT_RED4,
TZ1090_PIN_TFT_RED5,
TZ1090_PIN_TFT_RED6,
TZ1090_PIN_TFT_RED7,
TZ1090_PIN_TFT_GREEN0,
TZ1090_PIN_TFT_GREEN1,
TZ1090_PIN_TFT_GREEN2,
TZ1090_PIN_TFT_GREEN3,
TZ1090_PIN_TFT_GREEN4,
TZ1090_PIN_TFT_GREEN5,
TZ1090_PIN_TFT_GREEN6,
TZ1090_PIN_TFT_GREEN7,
TZ1090_PIN_TFT_BLUE0,
TZ1090_PIN_TFT_BLUE1,
TZ1090_PIN_TFT_BLUE2,
TZ1090_PIN_TFT_BLUE3,
TZ1090_PIN_TFT_BLUE4,
TZ1090_PIN_TFT_BLUE5,
TZ1090_PIN_TFT_BLUE6,
TZ1090_PIN_TFT_BLUE7,
TZ1090_PIN_TFT_VDDEN_GD,
TZ1090_PIN_TFT_PANELCLK,
TZ1090_PIN_TFT_BLANK_LS,
TZ1090_PIN_TFT_VSYNC_NS,
TZ1090_PIN_TFT_HSYNC_NR,
TZ1090_PIN_TFT_VD12ACB,
TZ1090_PIN_TFT_PWRSAVE,
TZ1090_PIN_TX_ON,
TZ1090_PIN_RX_ON,
TZ1090_PIN_PLL_ON,
TZ1090_PIN_PA_ON,
TZ1090_PIN_RX_HP,
TZ1090_PIN_GAIN0,
TZ1090_PIN_GAIN1,
TZ1090_PIN_GAIN2,
TZ1090_PIN_GAIN3,
TZ1090_PIN_GAIN4,
TZ1090_PIN_GAIN5,
TZ1090_PIN_GAIN6,
TZ1090_PIN_GAIN7,
TZ1090_PIN_ANT_SEL0,
TZ1090_PIN_ANT_SEL1,
TZ1090_PIN_SDH_CLK_IN,
/* Non-GPIO pins */
TZ1090_PIN_TCK,
TZ1090_PIN_TRST,
TZ1090_PIN_TDI,
TZ1090_PIN_TDO,
TZ1090_PIN_TMS,
TZ1090_PIN_CLK_OUT0,
TZ1090_PIN_CLK_OUT1,
NUM_GPIOS = TZ1090_PIN_TCK,
};
/* Pin names */
static const struct pinctrl_pin_desc tz1090_pins[] = {
/* GPIO pins */
PINCTRL_PIN(TZ1090_PIN_SDIO_CLK, "sdio_clk"),
PINCTRL_PIN(TZ1090_PIN_SDIO_CMD, "sdio_cmd"),
PINCTRL_PIN(TZ1090_PIN_SDIO_D0, "sdio_d0"),
PINCTRL_PIN(TZ1090_PIN_SDIO_D1, "sdio_d1"),
PINCTRL_PIN(TZ1090_PIN_SDIO_D2, "sdio_d2"),
PINCTRL_PIN(TZ1090_PIN_SDIO_D3, "sdio_d3"),
PINCTRL_PIN(TZ1090_PIN_SDH_CD, "sdh_cd"),
PINCTRL_PIN(TZ1090_PIN_SDH_WP, "sdh_wp"),
PINCTRL_PIN(TZ1090_PIN_SPI0_MCLK, "spi0_mclk"),
PINCTRL_PIN(TZ1090_PIN_SPI0_CS0, "spi0_cs0"),
PINCTRL_PIN(TZ1090_PIN_SPI0_CS1, "spi0_cs1"),
PINCTRL_PIN(TZ1090_PIN_SPI0_CS2, "spi0_cs2"),
PINCTRL_PIN(TZ1090_PIN_SPI0_DOUT, "spi0_dout"),
PINCTRL_PIN(TZ1090_PIN_SPI0_DIN, "spi0_din"),
PINCTRL_PIN(TZ1090_PIN_SPI1_MCLK, "spi1_mclk"),
PINCTRL_PIN(TZ1090_PIN_SPI1_CS0, "spi1_cs0"),
PINCTRL_PIN(TZ1090_PIN_SPI1_CS1, "spi1_cs1"),
PINCTRL_PIN(TZ1090_PIN_SPI1_CS2, "spi1_cs2"),
PINCTRL_PIN(TZ1090_PIN_SPI1_DOUT, "spi1_dout"),
PINCTRL_PIN(TZ1090_PIN_SPI1_DIN, "spi1_din"),
PINCTRL_PIN(TZ1090_PIN_UART0_RXD, "uart0_rxd"),
PINCTRL_PIN(TZ1090_PIN_UART0_TXD, "uart0_txd"),
PINCTRL_PIN(TZ1090_PIN_UART0_CTS, "uart0_cts"),
PINCTRL_PIN(TZ1090_PIN_UART0_RTS, "uart0_rts"),
PINCTRL_PIN(TZ1090_PIN_UART1_RXD, "uart1_rxd"),
PINCTRL_PIN(TZ1090_PIN_UART1_TXD, "uart1_txd"),
PINCTRL_PIN(TZ1090_PIN_SCB0_SDAT, "scb0_sdat"),
PINCTRL_PIN(TZ1090_PIN_SCB0_SCLK, "scb0_sclk"),
PINCTRL_PIN(TZ1090_PIN_SCB1_SDAT, "scb1_sdat"),
PINCTRL_PIN(TZ1090_PIN_SCB1_SCLK, "scb1_sclk"),
PINCTRL_PIN(TZ1090_PIN_SCB2_SDAT, "scb2_sdat"),
PINCTRL_PIN(TZ1090_PIN_SCB2_SCLK, "scb2_sclk"),
PINCTRL_PIN(TZ1090_PIN_I2S_MCLK, "i2s_mclk"),
PINCTRL_PIN(TZ1090_PIN_I2S_BCLK_OUT, "i2s_bclk_out"),
PINCTRL_PIN(TZ1090_PIN_I2S_LRCLK_OUT, "i2s_lrclk_out"),
PINCTRL_PIN(TZ1090_PIN_I2S_DOUT0, "i2s_dout0"),
PINCTRL_PIN(TZ1090_PIN_I2S_DOUT1, "i2s_dout1"),
PINCTRL_PIN(TZ1090_PIN_I2S_DOUT2, "i2s_dout2"),
PINCTRL_PIN(TZ1090_PIN_I2S_DIN, "i2s_din"),
PINCTRL_PIN(TZ1090_PIN_PDM_A, "pdm_a"),
PINCTRL_PIN(TZ1090_PIN_PDM_B, "pdm_b"),
PINCTRL_PIN(TZ1090_PIN_PDM_C, "pdm_c"),
PINCTRL_PIN(TZ1090_PIN_PDM_D, "pdm_d"),
PINCTRL_PIN(TZ1090_PIN_TFT_RED0, "tft_red0"),
PINCTRL_PIN(TZ1090_PIN_TFT_RED1, "tft_red1"),
PINCTRL_PIN(TZ1090_PIN_TFT_RED2, "tft_red2"),
PINCTRL_PIN(TZ1090_PIN_TFT_RED3, "tft_red3"),
PINCTRL_PIN(TZ1090_PIN_TFT_RED4, "tft_red4"),
PINCTRL_PIN(TZ1090_PIN_TFT_RED5, "tft_red5"),
PINCTRL_PIN(TZ1090_PIN_TFT_RED6, "tft_red6"),
PINCTRL_PIN(TZ1090_PIN_TFT_RED7, "tft_red7"),
PINCTRL_PIN(TZ1090_PIN_TFT_GREEN0, "tft_green0"),
PINCTRL_PIN(TZ1090_PIN_TFT_GREEN1, "tft_green1"),
PINCTRL_PIN(TZ1090_PIN_TFT_GREEN2, "tft_green2"),
PINCTRL_PIN(TZ1090_PIN_TFT_GREEN3, "tft_green3"),
PINCTRL_PIN(TZ1090_PIN_TFT_GREEN4, "tft_green4"),
PINCTRL_PIN(TZ1090_PIN_TFT_GREEN5, "tft_green5"),
PINCTRL_PIN(TZ1090_PIN_TFT_GREEN6, "tft_green6"),
PINCTRL_PIN(TZ1090_PIN_TFT_GREEN7, "tft_green7"),
PINCTRL_PIN(TZ1090_PIN_TFT_BLUE0, "tft_blue0"),
PINCTRL_PIN(TZ1090_PIN_TFT_BLUE1, "tft_blue1"),
PINCTRL_PIN(TZ1090_PIN_TFT_BLUE2, "tft_blue2"),
PINCTRL_PIN(TZ1090_PIN_TFT_BLUE3, "tft_blue3"),
PINCTRL_PIN(TZ1090_PIN_TFT_BLUE4, "tft_blue4"),
PINCTRL_PIN(TZ1090_PIN_TFT_BLUE5, "tft_blue5"),
PINCTRL_PIN(TZ1090_PIN_TFT_BLUE6, "tft_blue6"),
PINCTRL_PIN(TZ1090_PIN_TFT_BLUE7, "tft_blue7"),
PINCTRL_PIN(TZ1090_PIN_TFT_VDDEN_GD, "tft_vdden_gd"),
PINCTRL_PIN(TZ1090_PIN_TFT_PANELCLK, "tft_panelclk"),
PINCTRL_PIN(TZ1090_PIN_TFT_BLANK_LS, "tft_blank_ls"),
PINCTRL_PIN(TZ1090_PIN_TFT_VSYNC_NS, "tft_vsync_ns"),
PINCTRL_PIN(TZ1090_PIN_TFT_HSYNC_NR, "tft_hsync_nr"),
PINCTRL_PIN(TZ1090_PIN_TFT_VD12ACB, "tft_vd12acb"),
PINCTRL_PIN(TZ1090_PIN_TFT_PWRSAVE, "tft_pwrsave"),
PINCTRL_PIN(TZ1090_PIN_TX_ON, "tx_on"),
PINCTRL_PIN(TZ1090_PIN_RX_ON, "rx_on"),
PINCTRL_PIN(TZ1090_PIN_PLL_ON, "pll_on"),
PINCTRL_PIN(TZ1090_PIN_PA_ON, "pa_on"),
PINCTRL_PIN(TZ1090_PIN_RX_HP, "rx_hp"),
PINCTRL_PIN(TZ1090_PIN_GAIN0, "gain0"),
PINCTRL_PIN(TZ1090_PIN_GAIN1, "gain1"),
PINCTRL_PIN(TZ1090_PIN_GAIN2, "gain2"),
PINCTRL_PIN(TZ1090_PIN_GAIN3, "gain3"),
PINCTRL_PIN(TZ1090_PIN_GAIN4, "gain4"),
PINCTRL_PIN(TZ1090_PIN_GAIN5, "gain5"),
PINCTRL_PIN(TZ1090_PIN_GAIN6, "gain6"),
PINCTRL_PIN(TZ1090_PIN_GAIN7, "gain7"),
PINCTRL_PIN(TZ1090_PIN_ANT_SEL0, "ant_sel0"),
PINCTRL_PIN(TZ1090_PIN_ANT_SEL1, "ant_sel1"),
PINCTRL_PIN(TZ1090_PIN_SDH_CLK_IN, "sdh_clk_in"),
/* Non-GPIO pins */
PINCTRL_PIN(TZ1090_PIN_TCK, "tck"),
PINCTRL_PIN(TZ1090_PIN_TRST, "trst"),
PINCTRL_PIN(TZ1090_PIN_TDI, "tdi"),
PINCTRL_PIN(TZ1090_PIN_TDO, "tdo"),
PINCTRL_PIN(TZ1090_PIN_TMS, "tms"),
PINCTRL_PIN(TZ1090_PIN_CLK_OUT0, "clk_out0"),
PINCTRL_PIN(TZ1090_PIN_CLK_OUT1, "clk_out1"),
};
/* Pins in each pin group */
static const unsigned int spi1_cs2_pins[] = {
TZ1090_PIN_SPI1_CS2,
};
static const unsigned int pdm_d_pins[] = {
TZ1090_PIN_PDM_D,
};
static const unsigned int tft_pins[] = {
TZ1090_PIN_TFT_RED0,
TZ1090_PIN_TFT_RED1,
TZ1090_PIN_TFT_RED2,
TZ1090_PIN_TFT_RED3,
TZ1090_PIN_TFT_RED4,
TZ1090_PIN_TFT_RED5,
TZ1090_PIN_TFT_RED6,
TZ1090_PIN_TFT_RED7,
TZ1090_PIN_TFT_GREEN0,
TZ1090_PIN_TFT_GREEN1,
TZ1090_PIN_TFT_GREEN2,
TZ1090_PIN_TFT_GREEN3,
TZ1090_PIN_TFT_GREEN4,
TZ1090_PIN_TFT_GREEN5,
TZ1090_PIN_TFT_GREEN6,
TZ1090_PIN_TFT_GREEN7,
TZ1090_PIN_TFT_BLUE0,
TZ1090_PIN_TFT_BLUE1,
TZ1090_PIN_TFT_BLUE2,
TZ1090_PIN_TFT_BLUE3,
TZ1090_PIN_TFT_BLUE4,
TZ1090_PIN_TFT_BLUE5,
TZ1090_PIN_TFT_BLUE6,
TZ1090_PIN_TFT_BLUE7,
TZ1090_PIN_TFT_VDDEN_GD,
TZ1090_PIN_TFT_PANELCLK,
TZ1090_PIN_TFT_BLANK_LS,
TZ1090_PIN_TFT_VSYNC_NS,
TZ1090_PIN_TFT_HSYNC_NR,
TZ1090_PIN_TFT_VD12ACB,
TZ1090_PIN_TFT_PWRSAVE,
};
static const unsigned int afe_pins[] = {
TZ1090_PIN_TX_ON,
TZ1090_PIN_RX_ON,
TZ1090_PIN_PLL_ON,
TZ1090_PIN_PA_ON,
TZ1090_PIN_RX_HP,
TZ1090_PIN_ANT_SEL0,
TZ1090_PIN_ANT_SEL1,
TZ1090_PIN_GAIN0,
TZ1090_PIN_GAIN1,
TZ1090_PIN_GAIN2,
TZ1090_PIN_GAIN3,
TZ1090_PIN_GAIN4,
TZ1090_PIN_GAIN5,
TZ1090_PIN_GAIN6,
TZ1090_PIN_GAIN7,
};
static const unsigned int sdio_pins[] = {
TZ1090_PIN_SDIO_CLK,
TZ1090_PIN_SDIO_CMD,
TZ1090_PIN_SDIO_D0,
TZ1090_PIN_SDIO_D1,
TZ1090_PIN_SDIO_D2,
TZ1090_PIN_SDIO_D3,
};
static const unsigned int sdh_pins[] = {
TZ1090_PIN_SDH_CD,
TZ1090_PIN_SDH_WP,
TZ1090_PIN_SDH_CLK_IN,
};
static const unsigned int spi0_pins[] = {
TZ1090_PIN_SPI0_MCLK,
TZ1090_PIN_SPI0_CS0,
TZ1090_PIN_SPI0_CS1,
TZ1090_PIN_SPI0_CS2,
TZ1090_PIN_SPI0_DOUT,
TZ1090_PIN_SPI0_DIN,
};
static const unsigned int spi1_pins[] = {
TZ1090_PIN_SPI1_MCLK,
TZ1090_PIN_SPI1_CS0,
TZ1090_PIN_SPI1_CS1,
TZ1090_PIN_SPI1_CS2,
TZ1090_PIN_SPI1_DOUT,
TZ1090_PIN_SPI1_DIN,
};
static const unsigned int uart0_pins[] = {
TZ1090_PIN_UART0_RTS,
TZ1090_PIN_UART0_CTS,
TZ1090_PIN_UART0_TXD,
TZ1090_PIN_UART0_RXD,
};
static const unsigned int uart1_pins[] = {
TZ1090_PIN_UART1_TXD,
TZ1090_PIN_UART1_RXD,
};
static const unsigned int uart_pins[] = {
TZ1090_PIN_UART1_TXD,
TZ1090_PIN_UART1_RXD,
TZ1090_PIN_UART0_RTS,
TZ1090_PIN_UART0_CTS,
TZ1090_PIN_UART0_TXD,
TZ1090_PIN_UART0_RXD,
};
static const unsigned int scb0_pins[] = {
TZ1090_PIN_SCB0_SDAT,
TZ1090_PIN_SCB0_SCLK,
};
static const unsigned int scb1_pins[] = {
TZ1090_PIN_SCB1_SDAT,
TZ1090_PIN_SCB1_SCLK,
};
static const unsigned int scb2_pins[] = {
TZ1090_PIN_SCB2_SDAT,
TZ1090_PIN_SCB2_SCLK,
};
static const unsigned int i2s_pins[] = {
TZ1090_PIN_I2S_MCLK,
TZ1090_PIN_I2S_BCLK_OUT,
TZ1090_PIN_I2S_LRCLK_OUT,
TZ1090_PIN_I2S_DOUT0,
TZ1090_PIN_I2S_DOUT1,
TZ1090_PIN_I2S_DOUT2,
TZ1090_PIN_I2S_DIN,
};
static const unsigned int jtag_pins[] = {
TZ1090_PIN_TCK,
TZ1090_PIN_TRST,
TZ1090_PIN_TDI,
TZ1090_PIN_TDO,
TZ1090_PIN_TMS,
};
/* Pins in each drive pin group */
static const unsigned int drive_sdio_pins[] = {
TZ1090_PIN_SDIO_CLK,
TZ1090_PIN_SDIO_CMD,
TZ1090_PIN_SDIO_D0,
TZ1090_PIN_SDIO_D1,
TZ1090_PIN_SDIO_D2,
TZ1090_PIN_SDIO_D3,
TZ1090_PIN_SDH_WP,
TZ1090_PIN_SDH_CD,
TZ1090_PIN_SDH_CLK_IN,
};
static const unsigned int drive_i2s_pins[] = {
TZ1090_PIN_CLK_OUT1,
TZ1090_PIN_I2S_DIN,
TZ1090_PIN_I2S_DOUT0,
TZ1090_PIN_I2S_DOUT1,
TZ1090_PIN_I2S_DOUT2,
TZ1090_PIN_I2S_LRCLK_OUT,
TZ1090_PIN_I2S_BCLK_OUT,
TZ1090_PIN_I2S_MCLK,
};
static const unsigned int drive_scb0_pins[] = {
TZ1090_PIN_SCB0_SCLK,
TZ1090_PIN_SCB0_SDAT,
TZ1090_PIN_PDM_D,
TZ1090_PIN_PDM_C,
};
static const unsigned int drive_pdm_pins[] = {
TZ1090_PIN_CLK_OUT0,
TZ1090_PIN_PDM_B,
TZ1090_PIN_PDM_A,
};
/* Pin groups each function can be muxed to */
/*
* The magic "perip" function allows otherwise non-muxing pins to be enabled in
* peripheral mode.
*/
static const char * const perip_groups[] = {
/* non-muxing convenient gpio pingroups */
"uart",
"uart0",
"uart1",
"spi0",
"spi1",
"scb0",
"scb1",
"scb2",
"i2s",
/* individual pins not part of a pin mux group */
"spi0_mclk",
"spi0_cs0",
"spi0_cs1",
"spi0_cs2",
"spi0_dout",
"spi0_din",
"spi1_mclk",
"spi1_cs0",
"spi1_cs1",
"spi1_dout",
"spi1_din",
"uart0_rxd",
"uart0_txd",
"uart0_cts",
"uart0_rts",
"uart1_rxd",
"uart1_txd",
"scb0_sdat",
"scb0_sclk",
"scb1_sdat",
"scb1_sclk",
"scb2_sdat",
"scb2_sclk",
"i2s_mclk",
"i2s_bclk_out",
"i2s_lrclk_out",
"i2s_dout0",
"i2s_dout1",
"i2s_dout2",
"i2s_din",
"pdm_a",
"pdm_b",
"pdm_c",
};
static const char * const sdh_sdio_groups[] = {
"sdh",
"sdio",
/* sdh pins */
"sdh_cd",
"sdh_wp",
"sdh_clk_in",
/* sdio pins */
"sdio_clk",
"sdio_cmd",
"sdio_d0",
"sdio_d1",
"sdio_d2",
"sdio_d3",
};
static const char * const spi1_cs2_groups[] = {
"spi1_cs2",
};
static const char * const pdm_dac_groups[] = {
"pdm_d",
};
static const char * const usb_vbus_groups[] = {
"spi1_cs2",
"pdm_d",
};
static const char * const afe_groups[] = {
"afe",
/* afe pins */
"tx_on",
"rx_on",
"pll_on",
"pa_on",
"rx_hp",
"ant_sel0",
"ant_sel1",
"gain0",
"gain1",
"gain2",
"gain3",
"gain4",
"gain5",
"gain6",
"gain7",
};
static const char * const tft_groups[] = {
"tft",
/* tft pins */
"tft_red0",
"tft_red1",
"tft_red2",
"tft_red3",
"tft_red4",
"tft_red5",
"tft_red6",
"tft_red7",
"tft_green0",
"tft_green1",
"tft_green2",
"tft_green3",
"tft_green4",
"tft_green5",
"tft_green6",
"tft_green7",
"tft_blue0",
"tft_blue1",
"tft_blue2",
"tft_blue3",
"tft_blue4",
"tft_blue5",
"tft_blue6",
"tft_blue7",
"tft_vdden_gd",
"tft_panelclk",
"tft_blank_ls",
"tft_vsync_ns",
"tft_hsync_nr",
"tft_vd12acb",
"tft_pwrsave",
};
/* Mux functions that can be used by a mux */
enum tz1090_mux {
/* internal placeholder */
TZ1090_MUX_NA = -1,
/* magic per-non-muxing-GPIO-pin peripheral mode mux */
TZ1090_MUX_PERIP,
/* SDH/SDIO mux */
TZ1090_MUX_SDH,
TZ1090_MUX_SDIO,
/* USB_VBUS muxes */
TZ1090_MUX_SPI1_CS2,
TZ1090_MUX_PDM_DAC,
TZ1090_MUX_USB_VBUS,
/* AFE mux */
TZ1090_MUX_AFE,
TZ1090_MUX_TS_OUT_0,
/* EXT_DAC mux */
TZ1090_MUX_DAC,
TZ1090_MUX_NOT_IQADC_STB,
TZ1090_MUX_IQDAC_STB,
/* TFT mux */
TZ1090_MUX_TFT,
TZ1090_MUX_EXT_DAC,
TZ1090_MUX_TS_OUT_1,
TZ1090_MUX_LCD_TRACE,
TZ1090_MUX_PHY_RINGOSC,
};
#define FUNCTION(mux, fname, group) \
[(TZ1090_MUX_ ## mux)] = { \
.name = #fname, \
.groups = group##_groups, \
.ngroups = ARRAY_SIZE(group##_groups), \
}
/* For intermediate functions with submuxes */
#define NULL_FUNCTION(mux, fname) \
[(TZ1090_MUX_ ## mux)] = { \
.name = #fname, \
}
/* Must correlate with enum tz1090_mux */
static const struct tz1090_function tz1090_functions[] = {
/* FUNCTION function name pingroups */
FUNCTION(PERIP, perip, perip),
FUNCTION(SDH, sdh, sdh_sdio),
FUNCTION(SDIO, sdio, sdh_sdio),
FUNCTION(SPI1_CS2, spi1_cs2, spi1_cs2),
FUNCTION(PDM_DAC, pdm_dac, pdm_dac),
FUNCTION(USB_VBUS, usb_vbus, usb_vbus),
FUNCTION(AFE, afe, afe),
FUNCTION(TS_OUT_0, ts_out_0, afe),
FUNCTION(DAC, ext_dac, tft),
FUNCTION(NOT_IQADC_STB, not_iqadc_stb, tft),
FUNCTION(IQDAC_STB, iqdac_stb, tft),
FUNCTION(TFT, tft, tft),
NULL_FUNCTION(EXT_DAC, _ext_dac),
FUNCTION(TS_OUT_1, ts_out_1, tft),
FUNCTION(LCD_TRACE, lcd_trace, tft),
FUNCTION(PHY_RINGOSC, phy_ringosc, tft),
};
/* Sub muxes */
/**
* MUX() - Initialise a mux description.
* @f0: Function 0 (TZ1090_MUX_ is prepended, NA for none)
* @f1: Function 1 (TZ1090_MUX_ is prepended, NA for none)
* @f2: Function 2 (TZ1090_MUX_ is prepended, NA for none)
* @f3: Function 3 (TZ1090_MUX_ is prepended, NA for none)
* @f4: Function 4 (TZ1090_MUX_ is prepended, NA for none)
* @mux_r: Mux register (REG_PINCTRL_ is prepended)
* @mux_b: Bit number in register that the mux field begins
* @mux_w: Width of mux field in register
*/
#define MUX(f0, f1, f2, f3, f4, mux_r, mux_b, mux_w) \
{ \
.funcs = { \
TZ1090_MUX_ ## f0, \
TZ1090_MUX_ ## f1, \
TZ1090_MUX_ ## f2, \
TZ1090_MUX_ ## f3, \
TZ1090_MUX_ ## f4, \
}, \
.reg = (REG_PINCTRL_ ## mux_r), \
.bit = (mux_b), \
.width = (mux_w), \
}
/**
* DEFINE_SUBMUX() - Defines a submux description separate from a pin group.
* @mux: Mux name (_submux is appended)
* @f0: Function 0 (TZ1090_MUX_ is prepended, NA for none)
* @f1: Function 1 (TZ1090_MUX_ is prepended, NA for none)
* @f2: Function 2 (TZ1090_MUX_ is prepended, NA for none)
* @f3: Function 3 (TZ1090_MUX_ is prepended, NA for none)
* @f4: Function 4 (TZ1090_MUX_ is prepended, NA for none)
* @mux_r: Mux register (REG_PINCTRL_ is prepended)
* @mux_b: Bit number in register that the mux field begins
* @mux_w: Width of mux field in register
*
* A sub mux is a nested mux that can be bound to a magic function number used
* by another mux description. For example value 4 of the top level mux might
* correspond to a function which has a submux pointed to in tz1090_submux[].
* The outer mux can then take on any function in the top level mux or the
* submux, and if a submux function is chosen both muxes are updated to route
* the signal from the submux.
*
* The submux can be defined with DEFINE_SUBMUX and pointed to from
* tz1090_submux[] using SUBMUX.
*/
#define DEFINE_SUBMUX(mux, f0, f1, f2, f3, f4, mux_r, mux_b, mux_w) \
static struct tz1090_muxdesc mux ## _submux = \
MUX(f0, f1, f2, f3, f4, mux_r, mux_b, mux_w)
/**
* SUBMUX() - Link a submux to a function number.
* @f: Function name (TZ1090_MUX_ is prepended)
* @submux: Submux name (_submux is appended)
*
* For use in tz1090_submux[] initialisation to link an intermediate function
* number to a particular submux description. It indicates that when the
* function is chosen the signal is connected to the submux.
*/
#define SUBMUX(f, submux) [(TZ1090_MUX_ ## f)] = &(submux ## _submux)
/**
* MUX_PG() - Initialise a pin group with mux control
* @pg_name: Pin group name (stringified, _pins appended to get pins array)
* @f0: Function 0 (TZ1090_MUX_ is prepended, NA for none)
* @f1: Function 1 (TZ1090_MUX_ is prepended, NA for none)
* @f2: Function 2 (TZ1090_MUX_ is prepended, NA for none)
* @f3: Function 3 (TZ1090_MUX_ is prepended, NA for none)
* @f4: Function 4 (TZ1090_MUX_ is prepended, NA for none)
* @mux_r: Mux register (REG_PINCTRL_ is prepended)
* @mux_b: Bit number in register that the mux field begins
* @mux_w: Width of mux field in register
*/
#define MUX_PG(pg_name, f0, f1, f2, f3, f4, \
mux_r, mux_b, mux_w) \
{ \
.name = #pg_name, \
.pins = pg_name##_pins, \
.npins = ARRAY_SIZE(pg_name##_pins), \
.mux = MUX(f0, f1, f2, f3, f4, \
mux_r, mux_b, mux_w), \
}
/**
* SIMPLE_PG() - Initialise a simple convenience pin group
* @pg_name: Pin group name (stringified, _pins appended to get pins array)
*
* A simple pin group is simply used for binding pins together so they can be
* referred to by a single name instead of having to list every pin
* individually.
*/
#define SIMPLE_PG(pg_name) \
{ \
.name = #pg_name, \
.pins = pg_name##_pins, \
.npins = ARRAY_SIZE(pg_name##_pins), \
}
/**
* DRV_PG() - Initialise a pin group with drive control
* @pg_name: Pin group name (stringified, _pins appended to get pins array)
* @slw_b: Slew register bit.
* The same bit is used for Schmitt, and Drive (*2).
*/
#define DRV_PG(pg_name, slw_b) \
{ \
.name = #pg_name, \
.pins = pg_name##_pins, \
.npins = ARRAY_SIZE(pg_name##_pins), \
.drv = true, \
.slw_bit = (slw_b), \
}
/*
* Define main muxing pin groups
*/
/* submuxes */
/* name f0, f1, f2, f3, f4, mux r/b/w */
DEFINE_SUBMUX(ext_dac, DAC, NOT_IQADC_STB, IQDAC_STB, NA, NA, IF_CTL, 6, 2);
/* bind submuxes to internal functions */
static struct tz1090_muxdesc *tz1090_submux[] = {
SUBMUX(EXT_DAC, ext_dac),
};
/*
* These are the pin mux groups. Pin muxing can be enabled and disabled for each
* pin individually so these groups are internal. The mapping of pins to pin mux
* group is below (tz1090_mux_pins).
*/
static struct tz1090_pingroup tz1090_mux_groups[] = {
/* Muxing pin groups */
/* pg_name, f0, f1, f2, f3, f4, mux r/b/w */
MUX_PG(sdh, SDH, SDIO, NA, NA, NA, IF_CTL, 20, 2),
MUX_PG(sdio, SDIO, SDH, NA, NA, NA, IF_CTL, 16, 2),
MUX_PG(spi1_cs2, SPI1_CS2, USB_VBUS, NA, NA, NA, IF_CTL, 10, 2),
MUX_PG(pdm_d, PDM_DAC, USB_VBUS, NA, NA, NA, IF_CTL, 8, 2),
MUX_PG(afe, AFE, TS_OUT_0, NA, NA, NA, IF_CTL, 4, 2),
MUX_PG(tft, TFT, EXT_DAC, TS_OUT_1, LCD_TRACE, PHY_RINGOSC, IF_CTL, 0, 3),
};
/*
* This is the mapping from GPIO pins to pin mux groups in tz1090_mux_groups[].
* Pins which aren't muxable to multiple peripherals are set to
* TZ1090_MUX_GROUP_MAX to enable the "perip" function to enable/disable
* peripheral control of the pin.
*
* This array is initialised in tz1090_init_mux_pins().
*/
static u8 tz1090_mux_pins[NUM_GPIOS];
/* TZ1090_MUX_GROUP_MAX is used in tz1090_mux_pins[] for non-muxing pins */
#define TZ1090_MUX_GROUP_MAX ARRAY_SIZE(tz1090_mux_groups)
/**
* tz1090_init_mux_pins() - Initialise GPIO pin to mux group mapping.
*
* Initialises the tz1090_mux_pins[] array to be the inverse of the pin lists in
* each pin mux group in tz1090_mux_groups[].
*
* It is assumed that no pin mux groups overlap (share pins).
*/
static void __init tz1090_init_mux_pins(void)
{
unsigned int g, p;
const struct tz1090_pingroup *grp;
const unsigned int *pin;
for (p = 0; p < NUM_GPIOS; ++p)
tz1090_mux_pins[p] = TZ1090_MUX_GROUP_MAX;
grp = tz1090_mux_groups;
for (g = 0, grp = tz1090_mux_groups;
g < ARRAY_SIZE(tz1090_mux_groups); ++g, ++grp)
for (pin = grp->pins, p = 0; p < grp->npins; ++p, ++pin)
tz1090_mux_pins[*pin] = g;
}
/*
* These are the externally visible pin groups. Some of them allow group control
* of drive configuration. Some are just simple convenience pingroups. All the
* internal pin mux groups in tz1090_mux_groups[] are mirrored here with the
* same pins.
* Pseudo pin groups follow in the group numbers after this array for each GPIO
* pin. Any group used for muxing must have all pins belonging to the same pin
* mux group.
*/
static struct tz1090_pingroup tz1090_groups[] = {
/* Pin groups with drive control (with no out of place pins) */
/* pg_name, slw/schmitt/drv b */
DRV_PG(jtag, 11 /* 11, 22 */),
DRV_PG(tft, 10 /* 10, 20 */),
DRV_PG(scb2, 9 /* 9, 18 */),
DRV_PG(spi0, 7 /* 7, 14 */),
DRV_PG(uart, 5 /* 5, 10 */),
DRV_PG(scb1, 4 /* 4, 8 */),
DRV_PG(spi1, 3 /* 3, 6 */),
DRV_PG(afe, 0 /* 0, 0 */),
/*
* Drive specific pin groups (with odd combinations of pins which makes
* the pin group naming somewhat arbitrary)
*/
/* pg_name, slw/schmitt/drv b */
DRV_PG(drive_sdio, 8 /* 8, 16 */), /* sdio_* + sdh_* */
DRV_PG(drive_i2s, 6 /* 6, 12 */), /* i2s_* + clk_out1 */
DRV_PG(drive_scb0, 2 /* 2, 4 */), /* scb0_* + pdm_{c,d} */
DRV_PG(drive_pdm, 1 /* 1, 2 */), /* pdm_{a,b} + clk_out0 */
/* Convenience pin groups */
/* pg_name */
SIMPLE_PG(uart0),
SIMPLE_PG(uart1),
SIMPLE_PG(scb0),
SIMPLE_PG(i2s),
SIMPLE_PG(sdh),
SIMPLE_PG(sdio),
/* pseudo-pingroups for each GPIO pin follow */
};
/**
* struct tz1090_pmx - Private pinctrl data
* @dev: Platform device
* @pctl: Pin control device
* @regs: Register region
* @lock: Lock protecting coherency of pin_en, gpio_en, and SELECT regs
* @pin_en: Pins that have been enabled (32 pins packed into each element)
* @gpio_en: GPIOs that have been enabled (32 pins packed into each element)
*/
struct tz1090_pmx {
struct device *dev;
struct pinctrl_dev *pctl;
void __iomem *regs;
spinlock_t lock;
u32 pin_en[3];
u32 gpio_en[3];
};
static inline u32 pmx_read(struct tz1090_pmx *pmx, u32 reg)
{
return ioread32(pmx->regs + reg);
}
static inline void pmx_write(struct tz1090_pmx *pmx, u32 val, u32 reg)
{
iowrite32(val, pmx->regs + reg);
}
/*
* Pin control operations
*/
/* each GPIO pin has it's own pseudo pingroup containing only itself */
static int tz1090_pinctrl_get_groups_count(struct pinctrl_dev *pctldev)
{
return ARRAY_SIZE(tz1090_groups) + NUM_GPIOS;
}
static const char *tz1090_pinctrl_get_group_name(struct pinctrl_dev *pctldev,
unsigned int group)
{
if (group < ARRAY_SIZE(tz1090_groups)) {
/* normal pingroup */
return tz1090_groups[group].name;
} else {
/* individual gpio pin pseudo-pingroup */
unsigned int pin = group - ARRAY_SIZE(tz1090_groups);
return tz1090_pins[pin].name;
}
}
static int tz1090_pinctrl_get_group_pins(struct pinctrl_dev *pctldev,
unsigned int group,
const unsigned int **pins,
unsigned int *num_pins)
{
if (group < ARRAY_SIZE(tz1090_groups)) {
/* normal pingroup */
*pins = tz1090_groups[group].pins;
*num_pins = tz1090_groups[group].npins;
} else {
/* individual gpio pin pseudo-pingroup */
unsigned int pin = group - ARRAY_SIZE(tz1090_groups);
*pins = &tz1090_pins[pin].number;
*num_pins = 1;
}
return 0;
}
#ifdef CONFIG_DEBUG_FS
static void tz1090_pinctrl_pin_dbg_show(struct pinctrl_dev *pctldev,
struct seq_file *s,
unsigned int offset)
{
seq_printf(s, " %s", dev_name(pctldev->dev));
}
#endif
static int reserve_map(struct device *dev, struct pinctrl_map **map,
unsigned int *reserved_maps, unsigned int *num_maps,
unsigned int reserve)
{
unsigned int old_num = *reserved_maps;
unsigned int new_num = *num_maps + reserve;
struct pinctrl_map *new_map;
if (old_num >= new_num)
return 0;
new_map = krealloc(*map, sizeof(*new_map) * new_num, GFP_KERNEL);
if (!new_map) {
dev_err(dev, "krealloc(map) failed\n");
return -ENOMEM;
}
memset(new_map + old_num, 0, (new_num - old_num) * sizeof(*new_map));
*map = new_map;
*reserved_maps = new_num;
return 0;
}
static int add_map_mux(struct pinctrl_map **map, unsigned int *reserved_maps,
unsigned int *num_maps, const char *group,
const char *function)
{
if (WARN_ON(*num_maps == *reserved_maps))
return -ENOSPC;
(*map)[*num_maps].type = PIN_MAP_TYPE_MUX_GROUP;
(*map)[*num_maps].data.mux.group = group;
(*map)[*num_maps].data.mux.function = function;
(*num_maps)++;
return 0;
}
static int add_map_configs(struct device *dev,
struct pinctrl_map **map,
unsigned int *reserved_maps, unsigned int *num_maps,
const char *group, unsigned long *configs,
unsigned int num_configs)
{
unsigned long *dup_configs;
if (WARN_ON(*num_maps == *reserved_maps))
return -ENOSPC;
dup_configs = kmemdup(configs, num_configs * sizeof(*dup_configs),
GFP_KERNEL);
if (!dup_configs) {
dev_err(dev, "kmemdup(configs) failed\n");
return -ENOMEM;
}
(*map)[*num_maps].type = PIN_MAP_TYPE_CONFIGS_GROUP;
(*map)[*num_maps].data.configs.group_or_pin = group;
(*map)[*num_maps].data.configs.configs = dup_configs;
(*map)[*num_maps].data.configs.num_configs = num_configs;
(*num_maps)++;
return 0;
}
static void tz1090_pinctrl_dt_free_map(struct pinctrl_dev *pctldev,
struct pinctrl_map *map,
unsigned int num_maps)
{
int i;
for (i = 0; i < num_maps; i++)
if (map[i].type == PIN_MAP_TYPE_CONFIGS_GROUP)
kfree(map[i].data.configs.configs);
kfree(map);
}
static int tz1090_pinctrl_dt_subnode_to_map(struct device *dev,
struct device_node *np,
struct pinctrl_map **map,
unsigned int *reserved_maps,
unsigned int *num_maps)
{
int ret;
const char *function;
unsigned long *configs = NULL;
unsigned int num_configs = 0;
unsigned int reserve;
struct property *prop;
const char *group;
ret = of_property_read_string(np, "tz1090,function", &function);
if (ret < 0) {
/* EINVAL=missing, which is fine since it's optional */
if (ret != -EINVAL)
dev_err(dev, "could not parse property function\n");
function = NULL;
}
ret = pinconf_generic_parse_dt_config(np, NULL, &configs, &num_configs);
if (ret)
return ret;
reserve = 0;
if (function != NULL)
reserve++;
if (num_configs)
reserve++;
ret = of_property_count_strings(np, "tz1090,pins");
if (ret < 0) {
dev_err(dev, "could not parse property pins\n");
goto exit;
}
reserve *= ret;
ret = reserve_map(dev, map, reserved_maps, num_maps, reserve);
if (ret < 0)
goto exit;
of_property_for_each_string(np, "tz1090,pins", prop, group) {
if (function) {
ret = add_map_mux(map, reserved_maps, num_maps,
group, function);
if (ret < 0)
goto exit;
}
if (num_configs) {
ret = add_map_configs(dev, map, reserved_maps,
num_maps, group, configs,
num_configs);
if (ret < 0)
goto exit;
}
}
ret = 0;
exit:
kfree(configs);
return ret;
}
static int tz1090_pinctrl_dt_node_to_map(struct pinctrl_dev *pctldev,
struct device_node *np_config,
struct pinctrl_map **map,
unsigned int *num_maps)
{
unsigned int reserved_maps;
struct device_node *np;
int ret;
reserved_maps = 0;
*map = NULL;
*num_maps = 0;
for_each_child_of_node(np_config, np) {
ret = tz1090_pinctrl_dt_subnode_to_map(pctldev->dev, np, map,
&reserved_maps,
num_maps);
if (ret < 0) {
tz1090_pinctrl_dt_free_map(pctldev, *map, *num_maps);
return ret;
}
}
return 0;
}
static struct pinctrl_ops tz1090_pinctrl_ops = {
.get_groups_count = tz1090_pinctrl_get_groups_count,
.get_group_name = tz1090_pinctrl_get_group_name,
.get_group_pins = tz1090_pinctrl_get_group_pins,
#ifdef CONFIG_DEBUG_FS
.pin_dbg_show = tz1090_pinctrl_pin_dbg_show,
#endif
.dt_node_to_map = tz1090_pinctrl_dt_node_to_map,
.dt_free_map = tz1090_pinctrl_dt_free_map,
};
/*
* Pin mux operations
*/
static int tz1090_pinctrl_get_funcs_count(struct pinctrl_dev *pctldev)
{
return ARRAY_SIZE(tz1090_functions);
}
static const char *tz1090_pinctrl_get_func_name(struct pinctrl_dev *pctldev,
unsigned int function)
{
return tz1090_functions[function].name;
}
static int tz1090_pinctrl_get_func_groups(struct pinctrl_dev *pctldev,
unsigned int function,
const char * const **groups,
unsigned int * const num_groups)
{
/* pingroup functions */
*groups = tz1090_functions[function].groups;
*num_groups = tz1090_functions[function].ngroups;
return 0;
}
/**
* tz1090_pinctrl_select() - update bit in SELECT register
* @pmx: Pinmux data
* @pin: Pin number (must be within GPIO range)
*/
static void tz1090_pinctrl_select(struct tz1090_pmx *pmx,
unsigned int pin)
{
u32 reg, reg_shift, select, val;
unsigned int pmx_index, pmx_shift;
unsigned long flags;
/* uses base 32 instead of base 30 */
pmx_index = pin >> 5;
pmx_shift = pin & 0x1f;
/* select = !perip || gpio */
select = ((~pmx->pin_en[pmx_index] |
pmx->gpio_en[pmx_index]) >> pmx_shift) & 1;
/* find register and bit offset (base 30) */
reg = REG_PINCTRL_SELECT + 4*(pin / 30);
reg_shift = pin % 30;
/* modify gpio select bit */
__global_lock2(flags);
val = pmx_read(pmx, reg);
val &= ~BIT(reg_shift);
val |= select << reg_shift;
pmx_write(pmx, val, reg);
__global_unlock2(flags);
}
/**
* tz1090_pinctrl_gpio_select() - enable/disable GPIO usage for a pin
* @pmx: Pinmux data
* @pin: Pin number
* @gpio_select: true to enable pin as GPIO,
* false to leave control to whatever function is enabled
*
* Records that GPIO usage is enabled/disabled so that enabling a function
* doesn't override the SELECT register bit.
*/
static void tz1090_pinctrl_gpio_select(struct tz1090_pmx *pmx,
unsigned int pin,
bool gpio_select)
{
unsigned int index, shift;
u32 gpio_en;
if (pin >= NUM_GPIOS)
return;
/* uses base 32 instead of base 30 */
index = pin >> 5;
shift = pin & 0x1f;
spin_lock(&pmx->lock);
/* keep a record whether gpio is selected */
gpio_en = pmx->gpio_en[index];
gpio_en &= ~BIT(shift);
if (gpio_select)
gpio_en |= BIT(shift);
pmx->gpio_en[index] = gpio_en;
/* update the select bit */
tz1090_pinctrl_select(pmx, pin);
spin_unlock(&pmx->lock);
}
/**
* tz1090_pinctrl_perip_select() - enable/disable peripheral interface for a pin
* @pmx: Pinmux data
* @pin: Pin number
* @perip_select: true to enable peripheral interface when not GPIO,
* false to leave pin in GPIO mode
*
* Records that peripheral usage is enabled/disabled so that SELECT register can
* be set appropriately when GPIO is disabled.
*/
static void tz1090_pinctrl_perip_select(struct tz1090_pmx *pmx,
unsigned int pin,
bool perip_select)
{
unsigned int index, shift;
u32 pin_en;
if (pin >= NUM_GPIOS)
return;
/* uses base 32 instead of base 30 */
index = pin >> 5;
shift = pin & 0x1f;
spin_lock(&pmx->lock);
/* keep a record whether peripheral is selected */
pin_en = pmx->pin_en[index];
pin_en &= ~BIT(shift);
if (perip_select)
pin_en |= BIT(shift);
pmx->pin_en[index] = pin_en;
/* update the select bit */
tz1090_pinctrl_select(pmx, pin);
spin_unlock(&pmx->lock);
}
/**
* tz1090_pinctrl_enable_mux() - Switch a pin mux group to a function.
* @pmx: Pinmux data
* @desc: Pinmux description
* @function: Function to switch to
*
* Enable a particular function on a pin mux group. Since pin mux descriptions
* are nested this function is recursive.
*/
static int tz1090_pinctrl_enable_mux(struct tz1090_pmx *pmx,
const struct tz1090_muxdesc *desc,
unsigned int function)
{
const int *fit;
unsigned long flags;
int mux;
unsigned int func, ret;
u32 reg, mask;
/* find the mux value for this function, searching recursively */
for (mux = 0, fit = desc->funcs;
mux < ARRAY_SIZE(desc->funcs); ++mux, ++fit) {
func = *fit;
if (func == function)
goto found_mux;
/* maybe it's a sub-mux */
if (func < ARRAY_SIZE(tz1090_submux) && tz1090_submux[func]) {
ret = tz1090_pinctrl_enable_mux(pmx,
tz1090_submux[func],
function);
if (!ret)
goto found_mux;
}
}
return -EINVAL;
found_mux:
/* Set up the mux */
if (desc->width) {
mask = (BIT(desc->width) - 1) << desc->bit;
__global_lock2(flags);
reg = pmx_read(pmx, desc->reg);
reg &= ~mask;
reg |= (mux << desc->bit) & mask;
pmx_write(pmx, reg, desc->reg);
__global_unlock2(flags);
}
return 0;
}
/**
* tz1090_pinctrl_enable() - Enable a function on a pin group.
* @pctldev: Pin control data
* @function: Function index to enable
* @group: Group index to enable
*
* Enable a particular function on a group of pins. The per GPIO pin pseudo pin
* groups can be used (in which case the pin will be enabled in peripheral mode
* and if it belongs to a pin mux group the mux will be switched if it isn't
* already in use. Some convenience pin groups can also be used in which case
* the effect is the same as enabling the function on each individual pin in the
* group.
*/
static int tz1090_pinctrl_set_mux(struct pinctrl_dev *pctldev,
unsigned int function, unsigned int group)
{
struct tz1090_pmx *pmx = pinctrl_dev_get_drvdata(pctldev);
struct tz1090_pingroup *grp;
int ret;
unsigned int pin_num, mux_group, i, npins;
const unsigned int *pins;
/* group of pins? */
if (group < ARRAY_SIZE(tz1090_groups)) {
grp = &tz1090_groups[group];
npins = grp->npins;
pins = grp->pins;
/*
* All pins in the group must belong to the same mux group,
* which allows us to just use the mux group of the first pin.
* By explicitly listing permitted pingroups for each function
* the pinmux core should ensure this is always the case.
*/
} else {
pin_num = group - ARRAY_SIZE(tz1090_groups);
npins = 1;
pins = &pin_num;
}
mux_group = tz1090_mux_pins[*pins];
/* no mux group, but can still be individually muxed to peripheral */
if (mux_group >= TZ1090_MUX_GROUP_MAX) {
if (function == TZ1090_MUX_PERIP)
goto mux_pins;
return -EINVAL;
}
/* mux group already set to a different function? */
grp = &tz1090_mux_groups[mux_group];
if (grp->func_count && grp->func != function) {
dev_err(pctldev->dev,
"%s: can't mux pin(s) to '%s', group already muxed to '%s'\n",
__func__, tz1090_functions[function].name,
tz1090_functions[grp->func].name);
return -EBUSY;
}
dev_dbg(pctldev->dev, "%s: muxing %u pin(s) in '%s' to '%s'\n",
__func__, npins, grp->name, tz1090_functions[function].name);
/* if first pin in mux group to be enabled, enable the group mux */
if (!grp->func_count) {
grp->func = function;
ret = tz1090_pinctrl_enable_mux(pmx, &grp->mux, function);
if (ret)
return ret;
}
/* add pins to ref count and mux individually to peripheral */
grp->func_count += npins;
mux_pins:
for (i = 0; i < npins; ++i)
tz1090_pinctrl_perip_select(pmx, pins[i], true);
return 0;
}
/**
* tz1090_pinctrl_gpio_request_enable() - Put pin in GPIO mode.
* @pctldev: Pin control data
* @range: GPIO range
* @pin: Pin number
*
* Puts a particular pin into GPIO mode, disabling peripheral control until it's
* disabled again.
*/
static int tz1090_pinctrl_gpio_request_enable(struct pinctrl_dev *pctldev,
struct pinctrl_gpio_range *range,
unsigned int pin)
{
struct tz1090_pmx *pmx = pinctrl_dev_get_drvdata(pctldev);
tz1090_pinctrl_gpio_select(pmx, pin, true);
return 0;
}
/**
* tz1090_pinctrl_gpio_disable_free() - Take pin out of GPIO mode.
* @pctldev: Pin control data
* @range: GPIO range
* @pin: Pin number
*
* Take a particular pin out of GPIO mode. If the pin is enabled for a
* peripheral it will return to peripheral mode.
*/
static void tz1090_pinctrl_gpio_disable_free(struct pinctrl_dev *pctldev,
struct pinctrl_gpio_range *range,
unsigned int pin)
{
struct tz1090_pmx *pmx = pinctrl_dev_get_drvdata(pctldev);
tz1090_pinctrl_gpio_select(pmx, pin, false);
}
static struct pinmux_ops tz1090_pinmux_ops = {
.get_functions_count = tz1090_pinctrl_get_funcs_count,
.get_function_name = tz1090_pinctrl_get_func_name,
.get_function_groups = tz1090_pinctrl_get_func_groups,
.set_mux = tz1090_pinctrl_set_mux,
.gpio_request_enable = tz1090_pinctrl_gpio_request_enable,
.gpio_disable_free = tz1090_pinctrl_gpio_disable_free,
};
/*
* Pin config operations
*/
struct tz1090_pinconf_pullup {
unsigned char index;
unsigned char shift;
};
/* The mapping of pin to pull up/down register index and shift */
static struct tz1090_pinconf_pullup tz1090_pinconf_pullup[] = {
{5, 22}, /* 0 - TZ1090_PIN_SDIO_CLK */
{0, 14}, /* 1 - TZ1090_PIN_SDIO_CMD */
{0, 6}, /* 2 - TZ1090_PIN_SDIO_D0 */
{0, 8}, /* 3 - TZ1090_PIN_SDIO_D1 */
{0, 10}, /* 4 - TZ1090_PIN_SDIO_D2 */
{0, 12}, /* 5 - TZ1090_PIN_SDIO_D3 */
{0, 2}, /* 6 - TZ1090_PIN_SDH_CD */
{0, 4}, /* 7 - TZ1090_PIN_SDH_WP */
{0, 16}, /* 8 - TZ1090_PIN_SPI0_MCLK */
{0, 18}, /* 9 - TZ1090_PIN_SPI0_CS0 */
{0, 20}, /* 10 - TZ1090_PIN_SPI0_CS1 */
{0, 22}, /* 11 - TZ1090_PIN_SPI0_CS2 */
{0, 24}, /* 12 - TZ1090_PIN_SPI0_DOUT */
{0, 26}, /* 13 - TZ1090_PIN_SPI0_DIN */
{0, 28}, /* 14 - TZ1090_PIN_SPI1_MCLK */
{0, 30}, /* 15 - TZ1090_PIN_SPI1_CS0 */
{1, 0}, /* 16 - TZ1090_PIN_SPI1_CS1 */
{1, 2}, /* 17 - TZ1090_PIN_SPI1_CS2 */
{1, 4}, /* 18 - TZ1090_PIN_SPI1_DOUT */
{1, 6}, /* 19 - TZ1090_PIN_SPI1_DIN */
{1, 8}, /* 20 - TZ1090_PIN_UART0_RXD */
{1, 10}, /* 21 - TZ1090_PIN_UART0_TXD */
{1, 12}, /* 22 - TZ1090_PIN_UART0_CTS */
{1, 14}, /* 23 - TZ1090_PIN_UART0_RTS */
{1, 16}, /* 24 - TZ1090_PIN_UART1_RXD */
{1, 18}, /* 25 - TZ1090_PIN_UART1_TXD */
{1, 20}, /* 26 - TZ1090_PIN_SCB0_SDAT */
{1, 22}, /* 27 - TZ1090_PIN_SCB0_SCLK */
{1, 24}, /* 28 - TZ1090_PIN_SCB1_SDAT */
{1, 26}, /* 29 - TZ1090_PIN_SCB1_SCLK */
{1, 28}, /* 30 - TZ1090_PIN_SCB2_SDAT */
{1, 30}, /* 31 - TZ1090_PIN_SCB2_SCLK */
{2, 0}, /* 32 - TZ1090_PIN_I2S_MCLK */
{2, 2}, /* 33 - TZ1090_PIN_I2S_BCLK_OUT */
{2, 4}, /* 34 - TZ1090_PIN_I2S_LRCLK_OUT */
{2, 6}, /* 35 - TZ1090_PIN_I2S_DOUT0 */
{2, 8}, /* 36 - TZ1090_PIN_I2S_DOUT1 */
{2, 10}, /* 37 - TZ1090_PIN_I2S_DOUT2 */
{2, 12}, /* 38 - TZ1090_PIN_I2S_DIN */
{4, 12}, /* 39 - TZ1090_PIN_PDM_A */
{4, 14}, /* 40 - TZ1090_PIN_PDM_B */
{4, 18}, /* 41 - TZ1090_PIN_PDM_C */
{4, 20}, /* 42 - TZ1090_PIN_PDM_D */
{2, 14}, /* 43 - TZ1090_PIN_TFT_RED0 */
{2, 16}, /* 44 - TZ1090_PIN_TFT_RED1 */
{2, 18}, /* 45 - TZ1090_PIN_TFT_RED2 */
{2, 20}, /* 46 - TZ1090_PIN_TFT_RED3 */
{2, 22}, /* 47 - TZ1090_PIN_TFT_RED4 */
{2, 24}, /* 48 - TZ1090_PIN_TFT_RED5 */
{2, 26}, /* 49 - TZ1090_PIN_TFT_RED6 */
{2, 28}, /* 50 - TZ1090_PIN_TFT_RED7 */
{2, 30}, /* 51 - TZ1090_PIN_TFT_GREEN0 */
{3, 0}, /* 52 - TZ1090_PIN_TFT_GREEN1 */
{3, 2}, /* 53 - TZ1090_PIN_TFT_GREEN2 */
{3, 4}, /* 54 - TZ1090_PIN_TFT_GREEN3 */
{3, 6}, /* 55 - TZ1090_PIN_TFT_GREEN4 */
{3, 8}, /* 56 - TZ1090_PIN_TFT_GREEN5 */
{3, 10}, /* 57 - TZ1090_PIN_TFT_GREEN6 */
{3, 12}, /* 58 - TZ1090_PIN_TFT_GREEN7 */
{3, 14}, /* 59 - TZ1090_PIN_TFT_BLUE0 */
{3, 16}, /* 60 - TZ1090_PIN_TFT_BLUE1 */
{3, 18}, /* 61 - TZ1090_PIN_TFT_BLUE2 */
{3, 20}, /* 62 - TZ1090_PIN_TFT_BLUE3 */
{3, 22}, /* 63 - TZ1090_PIN_TFT_BLUE4 */
{3, 24}, /* 64 - TZ1090_PIN_TFT_BLUE5 */
{3, 26}, /* 65 - TZ1090_PIN_TFT_BLUE6 */
{3, 28}, /* 66 - TZ1090_PIN_TFT_BLUE7 */
{3, 30}, /* 67 - TZ1090_PIN_TFT_VDDEN_GD */
{4, 0}, /* 68 - TZ1090_PIN_TFT_PANELCLK */
{4, 2}, /* 69 - TZ1090_PIN_TFT_BLANK_LS */
{4, 4}, /* 70 - TZ1090_PIN_TFT_VSYNC_NS */
{4, 6}, /* 71 - TZ1090_PIN_TFT_HSYNC_NR */
{4, 8}, /* 72 - TZ1090_PIN_TFT_VD12ACB */
{4, 10}, /* 73 - TZ1090_PIN_TFT_PWRSAVE */
{4, 24}, /* 74 - TZ1090_PIN_TX_ON */
{4, 26}, /* 75 - TZ1090_PIN_RX_ON */
{4, 28}, /* 76 - TZ1090_PIN_PLL_ON */
{4, 30}, /* 77 - TZ1090_PIN_PA_ON */
{5, 0}, /* 78 - TZ1090_PIN_RX_HP */
{5, 6}, /* 79 - TZ1090_PIN_GAIN0 */
{5, 8}, /* 80 - TZ1090_PIN_GAIN1 */
{5, 10}, /* 81 - TZ1090_PIN_GAIN2 */
{5, 12}, /* 82 - TZ1090_PIN_GAIN3 */
{5, 14}, /* 83 - TZ1090_PIN_GAIN4 */
{5, 16}, /* 84 - TZ1090_PIN_GAIN5 */
{5, 18}, /* 85 - TZ1090_PIN_GAIN6 */
{5, 20}, /* 86 - TZ1090_PIN_GAIN7 */
{5, 2}, /* 87 - TZ1090_PIN_ANT_SEL0 */
{5, 4}, /* 88 - TZ1090_PIN_ANT_SEL1 */
{0, 0}, /* 89 - TZ1090_PIN_SDH_CLK_IN */
{5, 24}, /* 90 - TZ1090_PIN_TCK */
{5, 26}, /* 91 - TZ1090_PIN_TRST */
{5, 28}, /* 92 - TZ1090_PIN_TDI */
{5, 30}, /* 93 - TZ1090_PIN_TDO */
{6, 0}, /* 94 - TZ1090_PIN_TMS */
{4, 16}, /* 95 - TZ1090_PIN_CLK_OUT0 */
{4, 22}, /* 96 - TZ1090_PIN_CLK_OUT1 */
};
static int tz1090_pinconf_reg(struct pinctrl_dev *pctldev,
unsigned int pin,
enum pin_config_param param,
bool report_err,
u32 *reg, u32 *width, u32 *mask, u32 *shift,
u32 *val)
{
struct tz1090_pinconf_pullup *pu;
/* All supported pins have controllable input bias */
switch (param) {
case PIN_CONFIG_BIAS_DISABLE:
case PIN_CONFIG_BIAS_HIGH_IMPEDANCE:
*val = REG_PU_PD_TRISTATE;
break;
case PIN_CONFIG_BIAS_PULL_UP:
*val = REG_PU_PD_UP;
break;
case PIN_CONFIG_BIAS_PULL_DOWN:
*val = REG_PU_PD_DOWN;
break;
case PIN_CONFIG_BIAS_BUS_HOLD:
*val = REG_PU_PD_REPEATER;
break;
default:
return -ENOTSUPP;
};
/* Only input bias parameters supported */
pu = &tz1090_pinconf_pullup[pin];
*reg = REG_PINCTRL_PU_PD + 4*pu->index;
*shift = pu->shift;
*width = 2;
/* Calculate field information */
*mask = (BIT(*width) - 1) << *shift;
return 0;
}
static int tz1090_pinconf_get(struct pinctrl_dev *pctldev,
unsigned int pin, unsigned long *config)
{
struct tz1090_pmx *pmx = pinctrl_dev_get_drvdata(pctldev);
enum pin_config_param param = pinconf_to_config_param(*config);
int ret;
u32 reg, width, mask, shift, val, tmp, arg;
/* Get register information */
ret = tz1090_pinconf_reg(pctldev, pin, param, true,
&reg, &width, &mask, &shift, &val);
if (ret < 0)
return ret;
/* Extract field from register */
tmp = pmx_read(pmx, reg);
arg = ((tmp & mask) >> shift) == val;
/* Config not active */
if (!arg)
return -EINVAL;
/* And pack config */
*config = pinconf_to_config_packed(param, arg);
return 0;
}
static int tz1090_pinconf_set(struct pinctrl_dev *pctldev,
unsigned int pin, unsigned long *configs,
unsigned num_configs)
{
struct tz1090_pmx *pmx = pinctrl_dev_get_drvdata(pctldev);
enum pin_config_param param;
unsigned int arg;
int ret;
u32 reg, width, mask, shift, val, tmp;
unsigned long flags;
int i;
for (i = 0; i < num_configs; i++) {
param = pinconf_to_config_param(configs[i]);
arg = pinconf_to_config_argument(configs[i]);
dev_dbg(pctldev->dev, "%s(pin=%s, config=%#lx)\n",
__func__, tz1090_pins[pin].name, configs[i]);
/* Get register information */
ret = tz1090_pinconf_reg(pctldev, pin, param, true,
&reg, &width, &mask, &shift, &val);
if (ret < 0)
return ret;
/* Unpack argument and range check it */
if (arg > 1) {
dev_dbg(pctldev->dev, "%s: arg %u out of range\n",
__func__, arg);
return -EINVAL;
}
/* Write register field */
__global_lock2(flags);
tmp = pmx_read(pmx, reg);
tmp &= ~mask;
if (arg)
tmp |= val << shift;
pmx_write(pmx, tmp, reg);
__global_unlock2(flags);
} /* for each config */
return 0;
}
static const int tz1090_boolean_map[] = {
[0] = -EINVAL,
[1] = 1,
};
static const int tz1090_dr_map[] = {
[REG_DR_2mA] = 2,
[REG_DR_4mA] = 4,
[REG_DR_8mA] = 8,
[REG_DR_12mA] = 12,
};
static int tz1090_pinconf_group_reg(struct pinctrl_dev *pctldev,
const struct tz1090_pingroup *g,
enum pin_config_param param,
bool report_err,
u32 *reg, u32 *width, u32 *mask, u32 *shift,
const int **map)
{
/* Drive configuration applies in groups, but not to all groups. */
if (!g->drv) {
if (report_err)
dev_dbg(pctldev->dev,
"%s: group %s has no drive control\n",
__func__, g->name);
return -ENOTSUPP;
}
/* Find information about drive parameter's register */
switch (param) {
case PIN_CONFIG_INPUT_SCHMITT_ENABLE:
*reg = REG_PINCTRL_SCHMITT;
*width = 1;
*map = tz1090_boolean_map;
break;
case PIN_CONFIG_DRIVE_STRENGTH:
*reg = REG_PINCTRL_DR;
*width = 2;
*map = tz1090_dr_map;
break;
default:
return -ENOTSUPP;
};
/* Calculate field information */
*shift = g->slw_bit * *width;
*mask = (BIT(*width) - 1) << *shift;
return 0;
}
static int tz1090_pinconf_group_get(struct pinctrl_dev *pctldev,
unsigned int group,
unsigned long *config)
{
struct tz1090_pmx *pmx = pinctrl_dev_get_drvdata(pctldev);
const struct tz1090_pingroup *g;
enum pin_config_param param = pinconf_to_config_param(*config);
int ret, arg;
unsigned int pin;
u32 reg, width, mask, shift, val;
const int *map;
if (group >= ARRAY_SIZE(tz1090_groups)) {
pin = group - ARRAY_SIZE(tz1090_groups);
return tz1090_pinconf_get(pctldev, pin, config);
}
g = &tz1090_groups[group];
if (g->npins == 1) {
pin = g->pins[0];
ret = tz1090_pinconf_get(pctldev, pin, config);
if (ret != -ENOTSUPP)
return ret;
}
/* Get register information */
ret = tz1090_pinconf_group_reg(pctldev, g, param, true,
&reg, &width, &mask, &shift, &map);
if (ret < 0)
return ret;
/* Extract field from register */
val = pmx_read(pmx, reg);
arg = map[(val & mask) >> shift];
if (arg < 0)
return arg;
/* And pack config */
*config = pinconf_to_config_packed(param, arg);
return 0;
}
static int tz1090_pinconf_group_set(struct pinctrl_dev *pctldev,
unsigned int group, unsigned long *configs,
unsigned num_configs)
{
struct tz1090_pmx *pmx = pinctrl_dev_get_drvdata(pctldev);
const struct tz1090_pingroup *g;
enum pin_config_param param;
unsigned int arg, pin, i;
const unsigned int *pit;
int ret;
u32 reg, width, mask, shift, val;
unsigned long flags;
const int *map;
int j;
if (group >= ARRAY_SIZE(tz1090_groups)) {
pin = group - ARRAY_SIZE(tz1090_groups);
return tz1090_pinconf_set(pctldev, pin, configs, num_configs);
}
g = &tz1090_groups[group];
if (g->npins == 1) {
pin = g->pins[0];
ret = tz1090_pinconf_set(pctldev, pin, configs, num_configs);
if (ret != -ENOTSUPP)
return ret;
}
for (j = 0; j < num_configs; j++) {
param = pinconf_to_config_param(configs[j]);
dev_dbg(pctldev->dev, "%s(group=%s, config=%#lx)\n",
__func__, g->name, configs[j]);
/* Get register information */
ret = tz1090_pinconf_group_reg(pctldev, g, param, true, &reg,
&width, &mask, &shift, &map);
if (ret < 0) {
/*
* Maybe we're trying to set a per-pin configuration
* of a group, so do the pins one by one. This is
* mainly as a convenience.
*/
for (i = 0, pit = g->pins; i < g->npins; ++i, ++pit) {
ret = tz1090_pinconf_set(pctldev, *pit, configs,
num_configs);
if (ret)
return ret;
}
return 0;
}
/* Unpack argument and map it to register value */
arg = pinconf_to_config_argument(configs[j]);
for (i = 0; i < BIT(width); ++i) {
if (map[i] == arg || (map[i] == -EINVAL && !arg)) {
/* Write register field */
__global_lock2(flags);
val = pmx_read(pmx, reg);
val &= ~mask;
val |= i << shift;
pmx_write(pmx, val, reg);
__global_unlock2(flags);
goto next_config;
}
}
dev_dbg(pctldev->dev, "%s: arg %u not supported\n",
__func__, arg);
return -EINVAL;
next_config:
;
} /* for each config */
return 0;
}
static struct pinconf_ops tz1090_pinconf_ops = {
.is_generic = true,
.pin_config_get = tz1090_pinconf_get,
.pin_config_set = tz1090_pinconf_set,
.pin_config_group_get = tz1090_pinconf_group_get,
.pin_config_group_set = tz1090_pinconf_group_set,
.pin_config_config_dbg_show = pinconf_generic_dump_config,
};
/*
* Pin control driver setup
*/
static struct pinctrl_desc tz1090_pinctrl_desc = {
.pctlops = &tz1090_pinctrl_ops,
.pmxops = &tz1090_pinmux_ops,
.confops = &tz1090_pinconf_ops,
.owner = THIS_MODULE,
};
static int tz1090_pinctrl_probe(struct platform_device *pdev)
{
struct tz1090_pmx *pmx;
struct resource *res;
pmx = devm_kzalloc(&pdev->dev, sizeof(*pmx), GFP_KERNEL);
if (!pmx) {
dev_err(&pdev->dev, "Can't alloc tz1090_pmx\n");
return -ENOMEM;
}
pmx->dev = &pdev->dev;
spin_lock_init(&pmx->lock);
tz1090_pinctrl_desc.name = dev_name(&pdev->dev);
tz1090_pinctrl_desc.pins = tz1090_pins;
tz1090_pinctrl_desc.npins = ARRAY_SIZE(tz1090_pins);
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
pmx->regs = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(pmx->regs))
return PTR_ERR(pmx->regs);
pmx->pctl = pinctrl_register(&tz1090_pinctrl_desc, &pdev->dev, pmx);
if (!pmx->pctl) {
dev_err(&pdev->dev, "Couldn't register pinctrl driver\n");
return -ENODEV;
}
platform_set_drvdata(pdev, pmx);
dev_info(&pdev->dev, "TZ1090 pinctrl driver initialised\n");
return 0;
}
static int tz1090_pinctrl_remove(struct platform_device *pdev)
{
struct tz1090_pmx *pmx = platform_get_drvdata(pdev);
pinctrl_unregister(pmx->pctl);
return 0;
}
static const struct of_device_id tz1090_pinctrl_of_match[] = {
{ .compatible = "img,tz1090-pinctrl", },
{ },
};
static struct platform_driver tz1090_pinctrl_driver = {
.driver = {
.name = "tz1090-pinctrl",
.of_match_table = tz1090_pinctrl_of_match,
},
.probe = tz1090_pinctrl_probe,
.remove = tz1090_pinctrl_remove,
};
static int __init tz1090_pinctrl_init(void)
{
tz1090_init_mux_pins();
return platform_driver_register(&tz1090_pinctrl_driver);
}
arch_initcall(tz1090_pinctrl_init);
static void __exit tz1090_pinctrl_exit(void)
{
platform_driver_unregister(&tz1090_pinctrl_driver);
}
module_exit(tz1090_pinctrl_exit);
MODULE_AUTHOR("Imagination Technologies Ltd.");
MODULE_DESCRIPTION("Toumaz Xenif TZ1090 pinctrl driver");
MODULE_LICENSE("GPL v2");
MODULE_DEVICE_TABLE(of, tz1090_pinctrl_of_match);
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