527 lines
12 KiB
C
527 lines
12 KiB
C
/*
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* TI Palmas MFD Driver
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*
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* Copyright 2011-2012 Texas Instruments Inc.
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*
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* Author: Graeme Gregory <gg@slimlogic.co.uk>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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*/
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#include <linux/module.h>
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#include <linux/moduleparam.h>
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/i2c.h>
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#include <linux/interrupt.h>
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#include <linux/irq.h>
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#include <linux/regmap.h>
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#include <linux/err.h>
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#include <linux/mfd/core.h>
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#include <linux/mfd/palmas.h>
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#include <linux/of_platform.h>
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enum palmas_ids {
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PALMAS_PMIC_ID,
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PALMAS_GPIO_ID,
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PALMAS_LEDS_ID,
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PALMAS_WDT_ID,
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PALMAS_RTC_ID,
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PALMAS_PWRBUTTON_ID,
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PALMAS_GPADC_ID,
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PALMAS_RESOURCE_ID,
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PALMAS_CLK_ID,
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PALMAS_PWM_ID,
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PALMAS_USB_ID,
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};
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static const struct mfd_cell palmas_children[] = {
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{
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.name = "palmas-pmic",
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.id = PALMAS_PMIC_ID,
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},
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{
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.name = "palmas-gpio",
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.id = PALMAS_GPIO_ID,
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},
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{
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.name = "palmas-leds",
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.id = PALMAS_LEDS_ID,
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},
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{
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.name = "palmas-wdt",
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.id = PALMAS_WDT_ID,
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},
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{
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.name = "palmas-rtc",
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.id = PALMAS_RTC_ID,
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},
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{
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.name = "palmas-pwrbutton",
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.id = PALMAS_PWRBUTTON_ID,
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},
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{
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.name = "palmas-gpadc",
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.id = PALMAS_GPADC_ID,
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},
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{
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.name = "palmas-resource",
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.id = PALMAS_RESOURCE_ID,
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},
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{
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.name = "palmas-clk",
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.id = PALMAS_CLK_ID,
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},
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{
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.name = "palmas-pwm",
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.id = PALMAS_PWM_ID,
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},
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{
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.name = "palmas-usb",
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.id = PALMAS_USB_ID,
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}
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};
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static const struct regmap_config palmas_regmap_config[PALMAS_NUM_CLIENTS] = {
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{
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.reg_bits = 8,
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.val_bits = 8,
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.max_register = PALMAS_BASE_TO_REG(PALMAS_PU_PD_OD_BASE,
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PALMAS_PRIMARY_SECONDARY_PAD3),
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},
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{
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.reg_bits = 8,
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.val_bits = 8,
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.max_register = PALMAS_BASE_TO_REG(PALMAS_GPADC_BASE,
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PALMAS_GPADC_SMPS_VSEL_MONITORING),
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},
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{
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.reg_bits = 8,
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.val_bits = 8,
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.max_register = PALMAS_BASE_TO_REG(PALMAS_TRIM_GPADC_BASE,
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PALMAS_GPADC_TRIM16),
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},
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};
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static const struct regmap_irq palmas_irqs[] = {
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/* INT1 IRQs */
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[PALMAS_CHARG_DET_N_VBUS_OVV_IRQ] = {
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.mask = PALMAS_INT1_STATUS_CHARG_DET_N_VBUS_OVV,
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},
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[PALMAS_PWRON_IRQ] = {
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.mask = PALMAS_INT1_STATUS_PWRON,
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},
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[PALMAS_LONG_PRESS_KEY_IRQ] = {
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.mask = PALMAS_INT1_STATUS_LONG_PRESS_KEY,
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},
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[PALMAS_RPWRON_IRQ] = {
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.mask = PALMAS_INT1_STATUS_RPWRON,
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},
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[PALMAS_PWRDOWN_IRQ] = {
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.mask = PALMAS_INT1_STATUS_PWRDOWN,
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},
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[PALMAS_HOTDIE_IRQ] = {
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.mask = PALMAS_INT1_STATUS_HOTDIE,
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},
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[PALMAS_VSYS_MON_IRQ] = {
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.mask = PALMAS_INT1_STATUS_VSYS_MON,
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},
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[PALMAS_VBAT_MON_IRQ] = {
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.mask = PALMAS_INT1_STATUS_VBAT_MON,
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},
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/* INT2 IRQs*/
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[PALMAS_RTC_ALARM_IRQ] = {
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.mask = PALMAS_INT2_STATUS_RTC_ALARM,
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.reg_offset = 1,
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},
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[PALMAS_RTC_TIMER_IRQ] = {
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.mask = PALMAS_INT2_STATUS_RTC_TIMER,
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.reg_offset = 1,
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},
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[PALMAS_WDT_IRQ] = {
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.mask = PALMAS_INT2_STATUS_WDT,
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.reg_offset = 1,
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},
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[PALMAS_BATREMOVAL_IRQ] = {
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.mask = PALMAS_INT2_STATUS_BATREMOVAL,
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.reg_offset = 1,
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},
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[PALMAS_RESET_IN_IRQ] = {
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.mask = PALMAS_INT2_STATUS_RESET_IN,
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.reg_offset = 1,
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},
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[PALMAS_FBI_BB_IRQ] = {
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.mask = PALMAS_INT2_STATUS_FBI_BB,
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.reg_offset = 1,
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},
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[PALMAS_SHORT_IRQ] = {
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.mask = PALMAS_INT2_STATUS_SHORT,
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.reg_offset = 1,
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},
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[PALMAS_VAC_ACOK_IRQ] = {
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.mask = PALMAS_INT2_STATUS_VAC_ACOK,
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.reg_offset = 1,
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},
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/* INT3 IRQs */
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[PALMAS_GPADC_AUTO_0_IRQ] = {
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.mask = PALMAS_INT3_STATUS_GPADC_AUTO_0,
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.reg_offset = 2,
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},
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[PALMAS_GPADC_AUTO_1_IRQ] = {
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.mask = PALMAS_INT3_STATUS_GPADC_AUTO_1,
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.reg_offset = 2,
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},
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[PALMAS_GPADC_EOC_SW_IRQ] = {
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.mask = PALMAS_INT3_STATUS_GPADC_EOC_SW,
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.reg_offset = 2,
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},
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[PALMAS_GPADC_EOC_RT_IRQ] = {
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.mask = PALMAS_INT3_STATUS_GPADC_EOC_RT,
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.reg_offset = 2,
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},
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[PALMAS_ID_OTG_IRQ] = {
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.mask = PALMAS_INT3_STATUS_ID_OTG,
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.reg_offset = 2,
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},
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[PALMAS_ID_IRQ] = {
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.mask = PALMAS_INT3_STATUS_ID,
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.reg_offset = 2,
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},
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[PALMAS_VBUS_OTG_IRQ] = {
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.mask = PALMAS_INT3_STATUS_VBUS_OTG,
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.reg_offset = 2,
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},
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[PALMAS_VBUS_IRQ] = {
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.mask = PALMAS_INT3_STATUS_VBUS,
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.reg_offset = 2,
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},
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/* INT4 IRQs */
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[PALMAS_GPIO_0_IRQ] = {
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.mask = PALMAS_INT4_STATUS_GPIO_0,
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.reg_offset = 3,
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},
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[PALMAS_GPIO_1_IRQ] = {
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.mask = PALMAS_INT4_STATUS_GPIO_1,
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.reg_offset = 3,
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},
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[PALMAS_GPIO_2_IRQ] = {
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.mask = PALMAS_INT4_STATUS_GPIO_2,
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.reg_offset = 3,
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},
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[PALMAS_GPIO_3_IRQ] = {
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.mask = PALMAS_INT4_STATUS_GPIO_3,
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.reg_offset = 3,
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},
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[PALMAS_GPIO_4_IRQ] = {
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.mask = PALMAS_INT4_STATUS_GPIO_4,
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.reg_offset = 3,
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},
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[PALMAS_GPIO_5_IRQ] = {
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.mask = PALMAS_INT4_STATUS_GPIO_5,
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.reg_offset = 3,
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},
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[PALMAS_GPIO_6_IRQ] = {
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.mask = PALMAS_INT4_STATUS_GPIO_6,
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.reg_offset = 3,
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},
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[PALMAS_GPIO_7_IRQ] = {
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.mask = PALMAS_INT4_STATUS_GPIO_7,
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.reg_offset = 3,
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},
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};
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static struct regmap_irq_chip palmas_irq_chip = {
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.name = "palmas",
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.irqs = palmas_irqs,
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.num_irqs = ARRAY_SIZE(palmas_irqs),
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.num_regs = 4,
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.irq_reg_stride = 5,
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.status_base = PALMAS_BASE_TO_REG(PALMAS_INTERRUPT_BASE,
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PALMAS_INT1_STATUS),
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.mask_base = PALMAS_BASE_TO_REG(PALMAS_INTERRUPT_BASE,
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PALMAS_INT1_MASK),
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};
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static void __devinit palmas_dt_to_pdata(struct device_node *node,
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struct palmas_platform_data *pdata)
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{
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int ret;
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u32 prop;
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ret = of_property_read_u32(node, "ti,mux_pad1", &prop);
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if (!ret) {
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pdata->mux_from_pdata = 1;
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pdata->pad1 = prop;
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}
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ret = of_property_read_u32(node, "ti,mux_pad2", &prop);
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if (!ret) {
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pdata->mux_from_pdata = 1;
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pdata->pad2 = prop;
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}
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/* The default for this register is all masked */
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ret = of_property_read_u32(node, "ti,power_ctrl", &prop);
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if (!ret)
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pdata->power_ctrl = prop;
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else
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pdata->power_ctrl = PALMAS_POWER_CTRL_NSLEEP_MASK |
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PALMAS_POWER_CTRL_ENABLE1_MASK |
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PALMAS_POWER_CTRL_ENABLE2_MASK;
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}
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static int __devinit palmas_i2c_probe(struct i2c_client *i2c,
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const struct i2c_device_id *id)
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{
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struct palmas *palmas;
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struct palmas_platform_data *pdata;
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struct device_node *node = i2c->dev.of_node;
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int ret = 0, i;
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unsigned int reg, addr;
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int slave;
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struct mfd_cell *children;
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pdata = dev_get_platdata(&i2c->dev);
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if (node && !pdata) {
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pdata = devm_kzalloc(&i2c->dev, sizeof(*pdata), GFP_KERNEL);
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if (!pdata)
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return -ENOMEM;
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palmas_dt_to_pdata(node, pdata);
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}
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if (!pdata)
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return -EINVAL;
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palmas = devm_kzalloc(&i2c->dev, sizeof(struct palmas), GFP_KERNEL);
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if (palmas == NULL)
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return -ENOMEM;
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i2c_set_clientdata(i2c, palmas);
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palmas->dev = &i2c->dev;
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palmas->id = id->driver_data;
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palmas->irq = i2c->irq;
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for (i = 0; i < PALMAS_NUM_CLIENTS; i++) {
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if (i == 0)
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palmas->i2c_clients[i] = i2c;
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else {
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palmas->i2c_clients[i] =
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i2c_new_dummy(i2c->adapter,
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i2c->addr + i);
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if (!palmas->i2c_clients[i]) {
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dev_err(palmas->dev,
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"can't attach client %d\n", i);
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ret = -ENOMEM;
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goto err;
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}
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}
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palmas->regmap[i] = devm_regmap_init_i2c(palmas->i2c_clients[i],
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&palmas_regmap_config[i]);
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if (IS_ERR(palmas->regmap[i])) {
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ret = PTR_ERR(palmas->regmap[i]);
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dev_err(palmas->dev,
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"Failed to allocate regmap %d, err: %d\n",
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i, ret);
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goto err;
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}
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}
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/* Change IRQ into clear on read mode for efficiency */
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slave = PALMAS_BASE_TO_SLAVE(PALMAS_INTERRUPT_BASE);
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addr = PALMAS_BASE_TO_REG(PALMAS_INTERRUPT_BASE, PALMAS_INT_CTRL);
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reg = PALMAS_INT_CTRL_INT_CLEAR;
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regmap_write(palmas->regmap[slave], addr, reg);
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ret = regmap_add_irq_chip(palmas->regmap[slave], palmas->irq,
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IRQF_ONESHOT | IRQF_TRIGGER_LOW, 0, &palmas_irq_chip,
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&palmas->irq_data);
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if (ret < 0)
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goto err;
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slave = PALMAS_BASE_TO_SLAVE(PALMAS_PU_PD_OD_BASE);
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addr = PALMAS_BASE_TO_REG(PALMAS_PU_PD_OD_BASE,
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PALMAS_PRIMARY_SECONDARY_PAD1);
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if (pdata->mux_from_pdata) {
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reg = pdata->pad1;
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ret = regmap_write(palmas->regmap[slave], addr, reg);
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if (ret)
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goto err_irq;
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} else {
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ret = regmap_read(palmas->regmap[slave], addr, ®);
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if (ret)
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goto err_irq;
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}
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if (!(reg & PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_0))
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palmas->gpio_muxed |= PALMAS_GPIO_0_MUXED;
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if (!(reg & PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_1_MASK))
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palmas->gpio_muxed |= PALMAS_GPIO_1_MUXED;
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else if ((reg & PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_1_MASK) ==
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(2 << PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_1_SHIFT))
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palmas->led_muxed |= PALMAS_LED1_MUXED;
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else if ((reg & PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_1_MASK) ==
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(3 << PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_1_SHIFT))
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palmas->pwm_muxed |= PALMAS_PWM1_MUXED;
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if (!(reg & PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_2_MASK))
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palmas->gpio_muxed |= PALMAS_GPIO_2_MUXED;
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else if ((reg & PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_2_MASK) ==
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(2 << PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_2_SHIFT))
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palmas->led_muxed |= PALMAS_LED2_MUXED;
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else if ((reg & PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_2_MASK) ==
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(3 << PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_2_SHIFT))
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palmas->pwm_muxed |= PALMAS_PWM2_MUXED;
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if (!(reg & PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_3))
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palmas->gpio_muxed |= PALMAS_GPIO_3_MUXED;
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addr = PALMAS_BASE_TO_REG(PALMAS_PU_PD_OD_BASE,
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PALMAS_PRIMARY_SECONDARY_PAD2);
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if (pdata->mux_from_pdata) {
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reg = pdata->pad2;
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ret = regmap_write(palmas->regmap[slave], addr, reg);
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if (ret)
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goto err_irq;
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} else {
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ret = regmap_read(palmas->regmap[slave], addr, ®);
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if (ret)
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goto err_irq;
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}
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if (!(reg & PALMAS_PRIMARY_SECONDARY_PAD2_GPIO_4))
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palmas->gpio_muxed |= PALMAS_GPIO_4_MUXED;
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if (!(reg & PALMAS_PRIMARY_SECONDARY_PAD2_GPIO_5_MASK))
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palmas->gpio_muxed |= PALMAS_GPIO_5_MUXED;
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if (!(reg & PALMAS_PRIMARY_SECONDARY_PAD2_GPIO_6))
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palmas->gpio_muxed |= PALMAS_GPIO_6_MUXED;
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if (!(reg & PALMAS_PRIMARY_SECONDARY_PAD2_GPIO_7_MASK))
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palmas->gpio_muxed |= PALMAS_GPIO_7_MUXED;
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dev_info(palmas->dev, "Muxing GPIO %x, PWM %x, LED %x\n",
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palmas->gpio_muxed, palmas->pwm_muxed,
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palmas->led_muxed);
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reg = pdata->power_ctrl;
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slave = PALMAS_BASE_TO_SLAVE(PALMAS_PMU_CONTROL_BASE);
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addr = PALMAS_BASE_TO_REG(PALMAS_PMU_CONTROL_BASE, PALMAS_POWER_CTRL);
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ret = regmap_write(palmas->regmap[slave], addr, reg);
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if (ret)
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goto err_irq;
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/*
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* If we are probing with DT do this the DT way and return here
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* otherwise continue and add devices using mfd helpers.
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*/
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if (node) {
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ret = of_platform_populate(node, NULL, NULL, &i2c->dev);
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if (ret < 0)
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goto err_irq;
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else
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return ret;
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}
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children = kmemdup(palmas_children, sizeof(palmas_children),
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GFP_KERNEL);
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if (!children) {
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ret = -ENOMEM;
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goto err_irq;
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}
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children[PALMAS_PMIC_ID].platform_data = pdata->pmic_pdata;
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children[PALMAS_PMIC_ID].pdata_size = sizeof(*pdata->pmic_pdata);
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children[PALMAS_GPADC_ID].platform_data = pdata->gpadc_pdata;
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children[PALMAS_GPADC_ID].pdata_size = sizeof(*pdata->gpadc_pdata);
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children[PALMAS_RESOURCE_ID].platform_data = pdata->resource_pdata;
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children[PALMAS_RESOURCE_ID].pdata_size =
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sizeof(*pdata->resource_pdata);
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children[PALMAS_USB_ID].platform_data = pdata->usb_pdata;
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children[PALMAS_USB_ID].pdata_size = sizeof(*pdata->usb_pdata);
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children[PALMAS_CLK_ID].platform_data = pdata->clk_pdata;
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children[PALMAS_CLK_ID].pdata_size = sizeof(*pdata->clk_pdata);
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ret = mfd_add_devices(palmas->dev, -1,
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children, ARRAY_SIZE(palmas_children),
|
|
NULL, regmap_irq_chip_get_base(palmas->irq_data),
|
|
NULL);
|
|
kfree(children);
|
|
|
|
if (ret < 0)
|
|
goto err_devices;
|
|
|
|
return ret;
|
|
|
|
err_devices:
|
|
mfd_remove_devices(palmas->dev);
|
|
err_irq:
|
|
regmap_del_irq_chip(palmas->irq, palmas->irq_data);
|
|
err:
|
|
return ret;
|
|
}
|
|
|
|
static int palmas_i2c_remove(struct i2c_client *i2c)
|
|
{
|
|
struct palmas *palmas = i2c_get_clientdata(i2c);
|
|
|
|
mfd_remove_devices(palmas->dev);
|
|
regmap_del_irq_chip(palmas->irq, palmas->irq_data);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct i2c_device_id palmas_i2c_id[] = {
|
|
{ "palmas", },
|
|
{ "twl6035", },
|
|
{ "twl6037", },
|
|
{ "tps65913", },
|
|
{ /* end */ }
|
|
};
|
|
MODULE_DEVICE_TABLE(i2c, palmas_i2c_id);
|
|
|
|
static struct of_device_id __devinitdata of_palmas_match_tbl[] = {
|
|
{ .compatible = "ti,palmas", },
|
|
{ /* end */ }
|
|
};
|
|
|
|
static struct i2c_driver palmas_i2c_driver = {
|
|
.driver = {
|
|
.name = "palmas",
|
|
.of_match_table = of_palmas_match_tbl,
|
|
.owner = THIS_MODULE,
|
|
},
|
|
.probe = palmas_i2c_probe,
|
|
.remove = palmas_i2c_remove,
|
|
.id_table = palmas_i2c_id,
|
|
};
|
|
|
|
static int __init palmas_i2c_init(void)
|
|
{
|
|
return i2c_add_driver(&palmas_i2c_driver);
|
|
}
|
|
/* init early so consumer devices can complete system boot */
|
|
subsys_initcall(palmas_i2c_init);
|
|
|
|
static void __exit palmas_i2c_exit(void)
|
|
{
|
|
i2c_del_driver(&palmas_i2c_driver);
|
|
}
|
|
module_exit(palmas_i2c_exit);
|
|
|
|
MODULE_AUTHOR("Graeme Gregory <gg@slimlogic.co.uk>");
|
|
MODULE_DESCRIPTION("Palmas chip family multi-function driver");
|
|
MODULE_LICENSE("GPL");
|