605 lines
14 KiB
C
605 lines
14 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Driver for BCM6362 GPIO unit (pinctrl + GPIO)
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*
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* Copyright (C) 2021 Álvaro Fernández Rojas <noltari@gmail.com>
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* Copyright (C) 2016 Jonas Gorski <jonas.gorski@gmail.com>
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*/
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#include <linux/bits.h>
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#include <linux/gpio/driver.h>
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#include <linux/kernel.h>
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#include <linux/of.h>
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#include <linux/pinctrl/pinmux.h>
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#include <linux/platform_device.h>
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#include <linux/regmap.h>
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#include "../pinctrl-utils.h"
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#include "pinctrl-bcm63xx.h"
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#define BCM6362_BANK_GPIOS 32
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#define BCM6362_NUM_GPIOS 48
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#define BCM6362_NUM_LEDS 24
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#define BCM6362_LED_REG 0x10
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#define BCM6362_MODE_REG 0x18
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#define BCM6362_CTRL_REG 0x1c
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#define BCM6362_BASEMODE_REG 0x38
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#define BASEMODE_NAND BIT(2)
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enum bcm6362_pinctrl_reg {
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BCM6362_LEDCTRL,
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BCM6362_MODE,
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BCM6362_CTRL,
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BCM6362_BASEMODE,
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};
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struct bcm6362_function {
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const char *name;
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const char * const *groups;
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const unsigned num_groups;
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enum bcm6362_pinctrl_reg reg;
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uint32_t basemode_mask;
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};
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#define BCM6362_PIN(a, b, mask) \
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{ \
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.number = a, \
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.name = b, \
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.drv_data = (void *)(mask), \
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}
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static const struct pinctrl_pin_desc bcm6362_pins[] = {
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PINCTRL_PIN(0, "gpio0"),
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PINCTRL_PIN(1, "gpio1"),
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PINCTRL_PIN(2, "gpio2"),
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PINCTRL_PIN(3, "gpio3"),
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PINCTRL_PIN(4, "gpio4"),
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PINCTRL_PIN(5, "gpio5"),
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PINCTRL_PIN(6, "gpio6"),
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PINCTRL_PIN(7, "gpio7"),
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BCM6362_PIN(8, "gpio8", BASEMODE_NAND),
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PINCTRL_PIN(9, "gpio9"),
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PINCTRL_PIN(10, "gpio10"),
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PINCTRL_PIN(11, "gpio11"),
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BCM6362_PIN(12, "gpio12", BASEMODE_NAND),
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BCM6362_PIN(13, "gpio13", BASEMODE_NAND),
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BCM6362_PIN(14, "gpio14", BASEMODE_NAND),
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BCM6362_PIN(15, "gpio15", BASEMODE_NAND),
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BCM6362_PIN(16, "gpio16", BASEMODE_NAND),
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BCM6362_PIN(17, "gpio17", BASEMODE_NAND),
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BCM6362_PIN(18, "gpio18", BASEMODE_NAND),
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BCM6362_PIN(19, "gpio19", BASEMODE_NAND),
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BCM6362_PIN(20, "gpio20", BASEMODE_NAND),
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BCM6362_PIN(21, "gpio21", BASEMODE_NAND),
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BCM6362_PIN(22, "gpio22", BASEMODE_NAND),
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BCM6362_PIN(23, "gpio23", BASEMODE_NAND),
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PINCTRL_PIN(24, "gpio24"),
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PINCTRL_PIN(25, "gpio25"),
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PINCTRL_PIN(26, "gpio26"),
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BCM6362_PIN(27, "gpio27", BASEMODE_NAND),
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PINCTRL_PIN(28, "gpio28"),
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PINCTRL_PIN(29, "gpio29"),
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PINCTRL_PIN(30, "gpio30"),
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PINCTRL_PIN(31, "gpio31"),
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PINCTRL_PIN(32, "gpio32"),
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PINCTRL_PIN(33, "gpio33"),
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PINCTRL_PIN(34, "gpio34"),
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PINCTRL_PIN(35, "gpio35"),
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PINCTRL_PIN(36, "gpio36"),
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PINCTRL_PIN(37, "gpio37"),
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PINCTRL_PIN(38, "gpio38"),
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PINCTRL_PIN(39, "gpio39"),
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PINCTRL_PIN(40, "gpio40"),
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PINCTRL_PIN(41, "gpio41"),
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PINCTRL_PIN(42, "gpio42"),
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PINCTRL_PIN(43, "gpio43"),
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PINCTRL_PIN(44, "gpio44"),
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PINCTRL_PIN(45, "gpio45"),
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PINCTRL_PIN(46, "gpio46"),
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PINCTRL_PIN(47, "gpio47"),
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};
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static unsigned gpio0_pins[] = { 0 };
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static unsigned gpio1_pins[] = { 1 };
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static unsigned gpio2_pins[] = { 2 };
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static unsigned gpio3_pins[] = { 3 };
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static unsigned gpio4_pins[] = { 4 };
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static unsigned gpio5_pins[] = { 5 };
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static unsigned gpio6_pins[] = { 6 };
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static unsigned gpio7_pins[] = { 7 };
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static unsigned gpio8_pins[] = { 8 };
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static unsigned gpio9_pins[] = { 9 };
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static unsigned gpio10_pins[] = { 10 };
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static unsigned gpio11_pins[] = { 11 };
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static unsigned gpio12_pins[] = { 12 };
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static unsigned gpio13_pins[] = { 13 };
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static unsigned gpio14_pins[] = { 14 };
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static unsigned gpio15_pins[] = { 15 };
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static unsigned gpio16_pins[] = { 16 };
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static unsigned gpio17_pins[] = { 17 };
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static unsigned gpio18_pins[] = { 18 };
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static unsigned gpio19_pins[] = { 19 };
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static unsigned gpio20_pins[] = { 20 };
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static unsigned gpio21_pins[] = { 21 };
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static unsigned gpio22_pins[] = { 22 };
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static unsigned gpio23_pins[] = { 23 };
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static unsigned gpio24_pins[] = { 24 };
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static unsigned gpio25_pins[] = { 25 };
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static unsigned gpio26_pins[] = { 26 };
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static unsigned gpio27_pins[] = { 27 };
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static unsigned gpio28_pins[] = { 28 };
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static unsigned gpio29_pins[] = { 29 };
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static unsigned gpio30_pins[] = { 30 };
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static unsigned gpio31_pins[] = { 31 };
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static unsigned gpio32_pins[] = { 32 };
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static unsigned gpio33_pins[] = { 33 };
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static unsigned gpio34_pins[] = { 34 };
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static unsigned gpio35_pins[] = { 35 };
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static unsigned gpio36_pins[] = { 36 };
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static unsigned gpio37_pins[] = { 37 };
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static unsigned gpio38_pins[] = { 38 };
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static unsigned gpio39_pins[] = { 39 };
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static unsigned gpio40_pins[] = { 40 };
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static unsigned gpio41_pins[] = { 41 };
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static unsigned gpio42_pins[] = { 42 };
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static unsigned gpio43_pins[] = { 43 };
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static unsigned gpio44_pins[] = { 44 };
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static unsigned gpio45_pins[] = { 45 };
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static unsigned gpio46_pins[] = { 46 };
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static unsigned gpio47_pins[] = { 47 };
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static unsigned nand_grp_pins[] = {
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8, 12, 13, 14, 15, 16, 17,
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18, 19, 20, 21, 22, 23, 27,
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};
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static struct pingroup bcm6362_groups[] = {
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BCM_PIN_GROUP(gpio0),
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BCM_PIN_GROUP(gpio1),
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BCM_PIN_GROUP(gpio2),
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BCM_PIN_GROUP(gpio3),
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BCM_PIN_GROUP(gpio4),
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BCM_PIN_GROUP(gpio5),
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BCM_PIN_GROUP(gpio6),
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BCM_PIN_GROUP(gpio7),
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BCM_PIN_GROUP(gpio8),
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BCM_PIN_GROUP(gpio9),
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BCM_PIN_GROUP(gpio10),
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BCM_PIN_GROUP(gpio11),
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BCM_PIN_GROUP(gpio12),
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BCM_PIN_GROUP(gpio13),
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BCM_PIN_GROUP(gpio14),
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BCM_PIN_GROUP(gpio15),
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BCM_PIN_GROUP(gpio16),
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BCM_PIN_GROUP(gpio17),
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BCM_PIN_GROUP(gpio18),
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BCM_PIN_GROUP(gpio19),
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BCM_PIN_GROUP(gpio20),
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BCM_PIN_GROUP(gpio21),
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BCM_PIN_GROUP(gpio22),
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BCM_PIN_GROUP(gpio23),
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BCM_PIN_GROUP(gpio24),
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BCM_PIN_GROUP(gpio25),
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BCM_PIN_GROUP(gpio26),
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BCM_PIN_GROUP(gpio27),
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BCM_PIN_GROUP(gpio28),
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BCM_PIN_GROUP(gpio29),
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BCM_PIN_GROUP(gpio30),
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BCM_PIN_GROUP(gpio31),
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BCM_PIN_GROUP(gpio32),
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BCM_PIN_GROUP(gpio33),
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BCM_PIN_GROUP(gpio34),
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BCM_PIN_GROUP(gpio35),
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BCM_PIN_GROUP(gpio36),
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BCM_PIN_GROUP(gpio37),
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BCM_PIN_GROUP(gpio38),
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BCM_PIN_GROUP(gpio39),
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BCM_PIN_GROUP(gpio40),
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BCM_PIN_GROUP(gpio41),
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BCM_PIN_GROUP(gpio42),
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BCM_PIN_GROUP(gpio43),
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BCM_PIN_GROUP(gpio44),
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BCM_PIN_GROUP(gpio45),
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BCM_PIN_GROUP(gpio46),
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BCM_PIN_GROUP(gpio47),
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BCM_PIN_GROUP(nand_grp),
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};
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static const char * const led_groups[] = {
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"gpio0",
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"gpio1",
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"gpio2",
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"gpio3",
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"gpio4",
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"gpio5",
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"gpio6",
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"gpio7",
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"gpio8",
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"gpio9",
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"gpio10",
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"gpio11",
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"gpio12",
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"gpio13",
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"gpio14",
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"gpio15",
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"gpio16",
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"gpio17",
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"gpio18",
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"gpio19",
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"gpio20",
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"gpio21",
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"gpio22",
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"gpio23",
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};
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static const char * const usb_device_led_groups[] = {
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"gpio0",
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};
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static const char * const sys_irq_groups[] = {
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"gpio1",
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};
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static const char * const serial_led_clk_groups[] = {
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"gpio2",
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};
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static const char * const serial_led_data_groups[] = {
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"gpio3",
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};
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static const char * const robosw_led_data_groups[] = {
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"gpio4",
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};
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static const char * const robosw_led_clk_groups[] = {
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"gpio5",
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};
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static const char * const robosw_led0_groups[] = {
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"gpio6",
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};
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static const char * const robosw_led1_groups[] = {
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"gpio7",
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};
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static const char * const inet_led_groups[] = {
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"gpio8",
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};
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static const char * const spi_cs2_groups[] = {
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"gpio9",
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};
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static const char * const spi_cs3_groups[] = {
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"gpio10",
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};
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static const char * const ntr_pulse_groups[] = {
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"gpio11",
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};
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static const char * const uart1_scts_groups[] = {
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"gpio12",
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};
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static const char * const uart1_srts_groups[] = {
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"gpio13",
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};
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static const char * const uart1_sdin_groups[] = {
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"gpio14",
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};
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static const char * const uart1_sdout_groups[] = {
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"gpio15",
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};
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static const char * const adsl_spi_miso_groups[] = {
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"gpio16",
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};
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static const char * const adsl_spi_mosi_groups[] = {
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"gpio17",
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};
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static const char * const adsl_spi_clk_groups[] = {
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"gpio18",
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};
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static const char * const adsl_spi_cs_groups[] = {
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"gpio19",
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};
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static const char * const ephy0_led_groups[] = {
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"gpio20",
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};
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static const char * const ephy1_led_groups[] = {
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"gpio21",
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};
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static const char * const ephy2_led_groups[] = {
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"gpio22",
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};
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static const char * const ephy3_led_groups[] = {
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"gpio23",
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};
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static const char * const ext_irq0_groups[] = {
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"gpio24",
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};
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static const char * const ext_irq1_groups[] = {
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"gpio25",
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};
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static const char * const ext_irq2_groups[] = {
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"gpio26",
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};
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static const char * const ext_irq3_groups[] = {
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"gpio27",
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};
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static const char * const wifi_groups[] = {
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"gpio32",
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"gpio33",
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"gpio34",
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"gpio35",
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"gpio36",
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"gpio37",
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"gpio38",
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"gpio39",
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"gpio40",
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"gpio41",
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"gpio42",
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"gpio43",
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"gpio44",
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"gpio45",
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"gpio46",
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"gpio47",
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};
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static const char * const nand_groups[] = {
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"nand_grp",
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};
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#define BCM6362_LED_FUN(n) \
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{ \
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.name = #n, \
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.groups = n##_groups, \
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.num_groups = ARRAY_SIZE(n##_groups), \
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.reg = BCM6362_LEDCTRL, \
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}
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#define BCM6362_MODE_FUN(n) \
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{ \
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.name = #n, \
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.groups = n##_groups, \
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.num_groups = ARRAY_SIZE(n##_groups), \
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.reg = BCM6362_MODE, \
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}
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#define BCM6362_CTRL_FUN(n) \
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{ \
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.name = #n, \
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.groups = n##_groups, \
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.num_groups = ARRAY_SIZE(n##_groups), \
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.reg = BCM6362_CTRL, \
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}
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#define BCM6362_BASEMODE_FUN(n, mask) \
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{ \
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.name = #n, \
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.groups = n##_groups, \
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.num_groups = ARRAY_SIZE(n##_groups), \
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.reg = BCM6362_BASEMODE, \
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.basemode_mask = (mask), \
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}
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static const struct bcm6362_function bcm6362_funcs[] = {
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BCM6362_LED_FUN(led),
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BCM6362_MODE_FUN(usb_device_led),
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BCM6362_MODE_FUN(sys_irq),
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BCM6362_MODE_FUN(serial_led_clk),
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BCM6362_MODE_FUN(serial_led_data),
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BCM6362_MODE_FUN(robosw_led_data),
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BCM6362_MODE_FUN(robosw_led_clk),
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BCM6362_MODE_FUN(robosw_led0),
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BCM6362_MODE_FUN(robosw_led1),
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BCM6362_MODE_FUN(inet_led),
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BCM6362_MODE_FUN(spi_cs2),
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BCM6362_MODE_FUN(spi_cs3),
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BCM6362_MODE_FUN(ntr_pulse),
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BCM6362_MODE_FUN(uart1_scts),
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BCM6362_MODE_FUN(uart1_srts),
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BCM6362_MODE_FUN(uart1_sdin),
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BCM6362_MODE_FUN(uart1_sdout),
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BCM6362_MODE_FUN(adsl_spi_miso),
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BCM6362_MODE_FUN(adsl_spi_mosi),
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BCM6362_MODE_FUN(adsl_spi_clk),
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BCM6362_MODE_FUN(adsl_spi_cs),
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BCM6362_MODE_FUN(ephy0_led),
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BCM6362_MODE_FUN(ephy1_led),
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BCM6362_MODE_FUN(ephy2_led),
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BCM6362_MODE_FUN(ephy3_led),
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BCM6362_MODE_FUN(ext_irq0),
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BCM6362_MODE_FUN(ext_irq1),
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BCM6362_MODE_FUN(ext_irq2),
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BCM6362_MODE_FUN(ext_irq3),
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BCM6362_CTRL_FUN(wifi),
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BCM6362_BASEMODE_FUN(nand, BASEMODE_NAND),
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};
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static int bcm6362_pinctrl_get_group_count(struct pinctrl_dev *pctldev)
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{
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return ARRAY_SIZE(bcm6362_groups);
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}
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static const char *bcm6362_pinctrl_get_group_name(struct pinctrl_dev *pctldev,
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unsigned group)
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{
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return bcm6362_groups[group].name;
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}
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static int bcm6362_pinctrl_get_group_pins(struct pinctrl_dev *pctldev,
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unsigned group, const unsigned **pins,
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unsigned *npins)
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{
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*pins = bcm6362_groups[group].pins;
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*npins = bcm6362_groups[group].npins;
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return 0;
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}
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static int bcm6362_pinctrl_get_func_count(struct pinctrl_dev *pctldev)
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{
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return ARRAY_SIZE(bcm6362_funcs);
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}
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static const char *bcm6362_pinctrl_get_func_name(struct pinctrl_dev *pctldev,
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unsigned selector)
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{
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return bcm6362_funcs[selector].name;
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}
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static int bcm6362_pinctrl_get_groups(struct pinctrl_dev *pctldev,
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unsigned selector,
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const char * const **groups,
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unsigned * const num_groups)
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{
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*groups = bcm6362_funcs[selector].groups;
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*num_groups = bcm6362_funcs[selector].num_groups;
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return 0;
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}
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static void bcm6362_set_gpio(struct bcm63xx_pinctrl *pc, unsigned pin)
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{
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const struct pinctrl_pin_desc *desc = &bcm6362_pins[pin];
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unsigned int basemode = (uintptr_t)desc->drv_data;
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unsigned int mask = bcm63xx_bank_pin(pin);
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if (basemode)
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regmap_update_bits(pc->regs, BCM6362_BASEMODE_REG, basemode, 0);
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if (pin < BCM63XX_BANK_GPIOS) {
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/* base mode 0 => gpio 1 => mux function */
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regmap_update_bits(pc->regs, BCM6362_MODE_REG, mask, 0);
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/* pins 0-23 might be muxed to led */
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if (pin < BCM6362_NUM_LEDS)
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regmap_update_bits(pc->regs, BCM6362_LED_REG, mask, 0);
|
|
} else {
|
|
/* ctrl reg 0 => wifi function 1 => gpio */
|
|
regmap_update_bits(pc->regs, BCM6362_CTRL_REG, mask, mask);
|
|
}
|
|
}
|
|
|
|
static int bcm6362_pinctrl_set_mux(struct pinctrl_dev *pctldev,
|
|
unsigned selector, unsigned group)
|
|
{
|
|
struct bcm63xx_pinctrl *pc = pinctrl_dev_get_drvdata(pctldev);
|
|
const struct pingroup *pg = &bcm6362_groups[group];
|
|
const struct bcm6362_function *f = &bcm6362_funcs[selector];
|
|
unsigned i;
|
|
unsigned int reg;
|
|
unsigned int val, mask;
|
|
|
|
for (i = 0; i < pg->npins; i++)
|
|
bcm6362_set_gpio(pc, pg->pins[i]);
|
|
|
|
switch (f->reg) {
|
|
case BCM6362_LEDCTRL:
|
|
reg = BCM6362_LED_REG;
|
|
mask = BIT(pg->pins[0]);
|
|
val = BIT(pg->pins[0]);
|
|
break;
|
|
case BCM6362_MODE:
|
|
reg = BCM6362_MODE_REG;
|
|
mask = BIT(pg->pins[0]);
|
|
val = BIT(pg->pins[0]);
|
|
break;
|
|
case BCM6362_CTRL:
|
|
reg = BCM6362_CTRL_REG;
|
|
mask = BIT(pg->pins[0]);
|
|
val = 0;
|
|
break;
|
|
case BCM6362_BASEMODE:
|
|
reg = BCM6362_BASEMODE_REG;
|
|
mask = f->basemode_mask;
|
|
val = f->basemode_mask;
|
|
break;
|
|
default:
|
|
WARN_ON(1);
|
|
return -EINVAL;
|
|
}
|
|
|
|
regmap_update_bits(pc->regs, reg, mask, val);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int bcm6362_gpio_request_enable(struct pinctrl_dev *pctldev,
|
|
struct pinctrl_gpio_range *range,
|
|
unsigned offset)
|
|
{
|
|
struct bcm63xx_pinctrl *pc = pinctrl_dev_get_drvdata(pctldev);
|
|
|
|
/* disable all functions using this pin */
|
|
bcm6362_set_gpio(pc, offset);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct pinctrl_ops bcm6362_pctl_ops = {
|
|
.dt_free_map = pinctrl_utils_free_map,
|
|
.dt_node_to_map = pinconf_generic_dt_node_to_map_pin,
|
|
.get_group_name = bcm6362_pinctrl_get_group_name,
|
|
.get_group_pins = bcm6362_pinctrl_get_group_pins,
|
|
.get_groups_count = bcm6362_pinctrl_get_group_count,
|
|
};
|
|
|
|
static const struct pinmux_ops bcm6362_pmx_ops = {
|
|
.get_function_groups = bcm6362_pinctrl_get_groups,
|
|
.get_function_name = bcm6362_pinctrl_get_func_name,
|
|
.get_functions_count = bcm6362_pinctrl_get_func_count,
|
|
.gpio_request_enable = bcm6362_gpio_request_enable,
|
|
.set_mux = bcm6362_pinctrl_set_mux,
|
|
.strict = true,
|
|
};
|
|
|
|
static const struct bcm63xx_pinctrl_soc bcm6362_soc = {
|
|
.ngpios = BCM6362_NUM_GPIOS,
|
|
.npins = ARRAY_SIZE(bcm6362_pins),
|
|
.pctl_ops = &bcm6362_pctl_ops,
|
|
.pins = bcm6362_pins,
|
|
.pmx_ops = &bcm6362_pmx_ops,
|
|
};
|
|
|
|
static int bcm6362_pinctrl_probe(struct platform_device *pdev)
|
|
{
|
|
return bcm63xx_pinctrl_probe(pdev, &bcm6362_soc, NULL);
|
|
}
|
|
|
|
static const struct of_device_id bcm6362_pinctrl_match[] = {
|
|
{ .compatible = "brcm,bcm6362-pinctrl", },
|
|
{ /* sentinel */ }
|
|
};
|
|
|
|
static struct platform_driver bcm6362_pinctrl_driver = {
|
|
.probe = bcm6362_pinctrl_probe,
|
|
.driver = {
|
|
.name = "bcm6362-pinctrl",
|
|
.of_match_table = bcm6362_pinctrl_match,
|
|
},
|
|
};
|
|
|
|
builtin_platform_driver(bcm6362_pinctrl_driver);
|