drivers/pinctrl/sunxi/pinctrl-sun8i-a23-r.c

   1 /*
   2  * Allwinner A23 SoCs special pins pinctrl driver.
   3  *
   4  * Copyright (C) 2014 Chen-Yu Tsai
   5  * Chen-Yu Tsai <wens@csie.org>
   6  *
   7  * Copyright (C) 2014 Boris Brezillon
   8  * Boris Brezillon <boris.brezillon@free-electrons.com>
   9  *
  10  * Copyright (C) 2014 Maxime Ripard
  11  * Maxime Ripard <maxime.ripard@free-electrons.com>
  12  *
  13  * This file is licensed under the terms of the GNU General Public
  14  * License version 2.  This program is licensed "as is" without any
  15  * warranty of any kind, whether express or implied.
  16  */
  17
  18 #include <linux/init.h>
  19 #include <linux/platform_device.h>
  20 #include <linux/of.h>
  21 #include <linux/of_device.h>
  22 #include <linux/pinctrl/pinctrl.h>
  23 #include <linux/reset.h>
  24
  25 #include "pinctrl-sunxi.h"
  26
  27 static const struct sunxi_desc_pin sun8i_a23_r_pins[] = {
  28         SUNXI_PIN(SUNXI_PINCTRL_PIN(L, 0),
  29                   SUNXI_FUNCTION(0x0, "gpio_in"),
  30                   SUNXI_FUNCTION(0x1, "gpio_out"),
  31                   SUNXI_FUNCTION(0x2, "s_rsb"),         /* SCK */
  32                   SUNXI_FUNCTION(0x3, "s_i2c"),         /* SCK */
  33                   SUNXI_FUNCTION_IRQ_BANK(0x4, 0, 0)),  /* PL_EINT0 */
  34         SUNXI_PIN(SUNXI_PINCTRL_PIN(L, 1),
  35                   SUNXI_FUNCTION(0x0, "gpio_in"),
  36                   SUNXI_FUNCTION(0x1, "gpio_out"),
  37                   SUNXI_FUNCTION(0x2, "s_rsb"),         /* SDA */
  38                   SUNXI_FUNCTION(0x3, "s_i2c"),         /* SDA */
  39                   SUNXI_FUNCTION_IRQ_BANK(0x4, 0, 1)),  /* PL_EINT1 */
  40         SUNXI_PIN(SUNXI_PINCTRL_PIN(L, 2),
  41                   SUNXI_FUNCTION(0x0, "gpio_in"),
  42                   SUNXI_FUNCTION(0x1, "gpio_out"),
  43                   SUNXI_FUNCTION(0x2, "s_uart"),        /* TX */
  44                   SUNXI_FUNCTION_IRQ_BANK(0x4, 0, 2)),  /* PL_EINT2 */
  45         SUNXI_PIN(SUNXI_PINCTRL_PIN(L, 3),
  46                   SUNXI_FUNCTION(0x0, "gpio_in"),
  47                   SUNXI_FUNCTION(0x1, "gpio_out"),
  48                   SUNXI_FUNCTION(0x2, "s_uart"),        /* RX */
  49                   SUNXI_FUNCTION_IRQ_BANK(0x4, 0, 3)),  /* PL_EINT3 */
  50         SUNXI_PIN(SUNXI_PINCTRL_PIN(L, 4),
  51                   SUNXI_FUNCTION(0x0, "gpio_in"),
  52                   SUNXI_FUNCTION(0x1, "gpio_out"),
  53                   SUNXI_FUNCTION(0x3, "s_jtag"),        /* MS */
  54                   SUNXI_FUNCTION_IRQ_BANK(0x4, 0, 4)),  /* PL_EINT4 */
  55         SUNXI_PIN(SUNXI_PINCTRL_PIN(L, 5),
  56                   SUNXI_FUNCTION(0x0, "gpio_in"),
  57                   SUNXI_FUNCTION(0x1, "gpio_out"),
  58                   SUNXI_FUNCTION(0x3, "s_jtag"),        /* CK */
  59                   SUNXI_FUNCTION_IRQ_BANK(0x4, 0, 5)),  /* PL_EINT5 */
  60         SUNXI_PIN(SUNXI_PINCTRL_PIN(L, 6),
  61                   SUNXI_FUNCTION(0x0, "gpio_in"),
  62                   SUNXI_FUNCTION(0x1, "gpio_out"),
  63                   SUNXI_FUNCTION(0x3, "s_jtag"),        /* DO */
  64                   SUNXI_FUNCTION_IRQ_BANK(0x4, 0, 6)),  /* PL_EINT6 */
  65         SUNXI_PIN(SUNXI_PINCTRL_PIN(L, 7),
  66                   SUNXI_FUNCTION(0x0, "gpio_in"),
  67                   SUNXI_FUNCTION(0x1, "gpio_out"),
  68                   SUNXI_FUNCTION(0x3, "s_jtag"),        /* DI */
  69                   SUNXI_FUNCTION_IRQ_BANK(0x4, 0, 7)),  /* PL_EINT7 */
  70         SUNXI_PIN(SUNXI_PINCTRL_PIN(L, 8),
  71                   SUNXI_FUNCTION(0x0, "gpio_in"),
  72                   SUNXI_FUNCTION(0x1, "gpio_out"),
  73                   SUNXI_FUNCTION(0x2, "s_twi"),         /* SCK */
  74                   SUNXI_FUNCTION_IRQ_BANK(0x4, 0, 8)),  /* PL_EINT8 */
  75         SUNXI_PIN(SUNXI_PINCTRL_PIN(L, 9),
  76                   SUNXI_FUNCTION(0x0, "gpio_in"),
  77                   SUNXI_FUNCTION(0x1, "gpio_out"),
  78                   SUNXI_FUNCTION(0x2, "s_twi"),         /* SDA */
  79                   SUNXI_FUNCTION_IRQ_BANK(0x4, 0, 9)),  /* PL_EINT9 */
  80         SUNXI_PIN(SUNXI_PINCTRL_PIN(L, 10),
  81                   SUNXI_FUNCTION(0x0, "gpio_in"),
  82                   SUNXI_FUNCTION(0x1, "gpio_out"),
  83                   SUNXI_FUNCTION(0x2, "s_pwm"),
  84                   SUNXI_FUNCTION_IRQ_BANK(0x4, 0, 10)), /* PL_EINT10 */
  85         SUNXI_PIN(SUNXI_PINCTRL_PIN(L, 11),
  86                   SUNXI_FUNCTION(0x0, "gpio_in"),
  87                   SUNXI_FUNCTION(0x1, "gpio_out"),
  88                   SUNXI_FUNCTION_IRQ_BANK(0x4, 0, 11)), /* PL_EINT11 */
  89 };
  90
  91 static const struct sunxi_pinctrl_desc sun8i_a23_r_pinctrl_data = {
  92         .pins = sun8i_a23_r_pins,
  93         .npins = ARRAY_SIZE(sun8i_a23_r_pins),
  94         .pin_base = PL_BASE,
  95         .irq_banks = 1,
  96         .disable_strict_mode = true,
  97 };
  98
  99 static int sun8i_a23_r_pinctrl_probe(struct platform_device *pdev)
 100 {
 101         struct reset_control *rstc;
 102         int ret;
 103
 104         rstc = devm_reset_control_get_exclusive(&pdev->dev, NULL);
 105         if (IS_ERR(rstc)) {
 106                 ret = PTR_ERR(rstc);
 107                 if (ret == -EPROBE_DEFER)
 108                         return ret;
 109                 dev_err(&pdev->dev, "Reset controller missing err=%d\n", ret);
 110                 return ret;
 111         }
 112
 113         ret = reset_control_deassert(rstc);
 114         if (ret)
 115                 return ret;
 116
 117         ret = sunxi_pinctrl_init(pdev,
 118                                  &sun8i_a23_r_pinctrl_data);
 119
 120         if (ret)
 121                 reset_control_assert(rstc);
 122
 123         return ret;
 124 }
 125
 126 static const struct of_device_id sun8i_a23_r_pinctrl_match[] = {
 127         { .compatible = "allwinner,sun8i-a23-r-pinctrl", },
 128         {}
 129 };
 130
 131 static struct platform_driver sun8i_a23_r_pinctrl_driver = {
 132         .probe  = sun8i_a23_r_pinctrl_probe,
 133         .driver = {
 134                 .name           = "sun8i-a23-r-pinctrl",
 135                 .of_match_table = sun8i_a23_r_pinctrl_match,
 136         },
 137 };
 138 builtin_platform_driver(sun8i_a23_r_pinctrl_driver);