kernel/drivers/pinctrl/sunxi/pinctrl-sun6i-a31-r.c

   1 /*
   2  * Allwinner A31 SoCs special pins pinctrl driver.
   3  *
   4  * Copyright (C) 2014 Boris Brezillon
   5  * Boris Brezillon <boris.brezillon@free-electrons.com>
   6  *
   7  * Copyright (C) 2014 Maxime Ripard
   8  * Maxime Ripard <maxime.ripard@free-electrons.com>
   9  *
  10  * This file is licensed under the terms of the GNU General Public
  11  * License version 2.  This program is licensed "as is" without any
  12  * warranty of any kind, whether express or implied.
  13  */
  14
  15 #include <linux/module.h>
  16 #include <linux/platform_device.h>
  17 #include <linux/of.h>
  18 #include <linux/of_device.h>
  19 #include <linux/pinctrl/pinctrl.h>
  20 #include <linux/reset.h>
  21
  22 #include "pinctrl-sunxi.h"
  23
  24 static const struct sunxi_desc_pin sun6i_a31_r_pins[] = {
  25         SUNXI_PIN(SUNXI_PINCTRL_PIN(L, 0),
  26                   SUNXI_FUNCTION(0x0, "gpio_in"),
  27                   SUNXI_FUNCTION(0x1, "gpio_out"),
  28                   SUNXI_FUNCTION(0x2, "s_twi"),         /* SCK */
  29                   SUNXI_FUNCTION(0x3, "s_p2wi")),       /* SCK */
  30         SUNXI_PIN(SUNXI_PINCTRL_PIN(L, 1),
  31                   SUNXI_FUNCTION(0x0, "gpio_in"),
  32                   SUNXI_FUNCTION(0x1, "gpio_out"),
  33                   SUNXI_FUNCTION(0x2, "s_twi"),         /* SDA */
  34                   SUNXI_FUNCTION(0x3, "s_p2wi")),       /* SDA */
  35         SUNXI_PIN(SUNXI_PINCTRL_PIN(L, 2),
  36                   SUNXI_FUNCTION(0x0, "gpio_in"),
  37                   SUNXI_FUNCTION(0x1, "gpio_out"),
  38                   SUNXI_FUNCTION(0x2, "s_uart")),       /* TX */
  39         SUNXI_PIN(SUNXI_PINCTRL_PIN(L, 3),
  40                   SUNXI_FUNCTION(0x0, "gpio_in"),
  41                   SUNXI_FUNCTION(0x1, "gpio_out"),
  42                   SUNXI_FUNCTION(0x2, "s_uart")),       /* RX */
  43         SUNXI_PIN(SUNXI_PINCTRL_PIN(L, 4),
  44                   SUNXI_FUNCTION(0x0, "gpio_in"),
  45                   SUNXI_FUNCTION(0x1, "gpio_out"),
  46                   SUNXI_FUNCTION(0x2, "s_ir")),         /* RX */
  47         SUNXI_PIN(SUNXI_PINCTRL_PIN(L, 5),
  48                   SUNXI_FUNCTION(0x0, "gpio_in"),
  49                   SUNXI_FUNCTION(0x1, "gpio_out"),
  50                   SUNXI_FUNCTION(0x3, "s_jtag")),       /* MS */
  51         SUNXI_PIN(SUNXI_PINCTRL_PIN(L, 6),
  52                   SUNXI_FUNCTION(0x0, "gpio_in"),
  53                   SUNXI_FUNCTION(0x1, "gpio_out"),
  54                   SUNXI_FUNCTION(0x3, "s_jtag")),       /* CK */
  55         SUNXI_PIN(SUNXI_PINCTRL_PIN(L, 7),
  56                   SUNXI_FUNCTION(0x0, "gpio_in"),
  57                   SUNXI_FUNCTION(0x1, "gpio_out"),
  58                   SUNXI_FUNCTION(0x3, "s_jtag")),       /* DO */
  59         SUNXI_PIN(SUNXI_PINCTRL_PIN(L, 8),
  60                   SUNXI_FUNCTION(0x0, "gpio_in"),
  61                   SUNXI_FUNCTION(0x1, "gpio_out"),
  62                   SUNXI_FUNCTION(0x3, "s_jtag")),       /* DI */
  63         /* Hole */
  64         SUNXI_PIN(SUNXI_PINCTRL_PIN(M, 0),
  65                   SUNXI_FUNCTION(0x0, "gpio_in"),
  66                   SUNXI_FUNCTION(0x1, "gpio_out")),
  67         SUNXI_PIN(SUNXI_PINCTRL_PIN(M, 1),
  68                   SUNXI_FUNCTION(0x0, "gpio_in"),
  69                   SUNXI_FUNCTION(0x1, "gpio_out")),
  70         SUNXI_PIN(SUNXI_PINCTRL_PIN(M, 2),
  71                   SUNXI_FUNCTION(0x0, "gpio_in"),
  72                   SUNXI_FUNCTION(0x1, "gpio_out"),
  73                   SUNXI_FUNCTION(0x3, "1wire")),
  74         SUNXI_PIN(SUNXI_PINCTRL_PIN(M, 3),
  75                   SUNXI_FUNCTION(0x0, "gpio_in"),
  76                   SUNXI_FUNCTION(0x1, "gpio_out")),
  77         SUNXI_PIN(SUNXI_PINCTRL_PIN(M, 4),
  78                   SUNXI_FUNCTION(0x0, "gpio_in"),
  79                   SUNXI_FUNCTION(0x1, "gpio_out")),
  80         SUNXI_PIN(SUNXI_PINCTRL_PIN(M, 5),
  81                   SUNXI_FUNCTION(0x0, "gpio_in"),
  82                   SUNXI_FUNCTION(0x1, "gpio_out")),
  83         SUNXI_PIN(SUNXI_PINCTRL_PIN(M, 6),
  84                   SUNXI_FUNCTION(0x0, "gpio_in"),
  85                   SUNXI_FUNCTION(0x1, "gpio_out")),
  86         SUNXI_PIN(SUNXI_PINCTRL_PIN(M, 7),
  87                   SUNXI_FUNCTION(0x0, "gpio_in"),
  88                   SUNXI_FUNCTION(0x1, "gpio_out"),
  89                   SUNXI_FUNCTION(0x3, "rtc")),          /* CLKO */
  90 };
  91
  92 static const struct sunxi_pinctrl_desc sun6i_a31_r_pinctrl_data = {
  93         .pins = sun6i_a31_r_pins,
  94         .npins = ARRAY_SIZE(sun6i_a31_r_pins),
  95         .pin_base = PL_BASE,
  96         .irq_banks = 2,
  97 };
  98
  99 static int sun6i_a31_r_pinctrl_probe(struct platform_device *pdev)
 100 {
 101         struct reset_control *rstc;
 102         int ret;
 103
 104         rstc = devm_reset_control_get(&pdev->dev, NULL);
 105         if (IS_ERR(rstc)) {
 106                 dev_err(&pdev->dev, "Reset controller missing\n");
 107                 return PTR_ERR(rstc);
 108         }
 109
 110         ret = reset_control_deassert(rstc);
 111         if (ret)
 112                 return ret;
 113
 114         ret = sunxi_pinctrl_init(pdev,
 115                                  &sun6i_a31_r_pinctrl_data);
 116
 117         if (ret)
 118                 reset_control_assert(rstc);
 119
 120         return ret;
 121 }
 122
 123 static const struct of_device_id sun6i_a31_r_pinctrl_match[] = {
 124         { .compatible = "allwinner,sun6i-a31-r-pinctrl", },
 125         {}
 126 };
 127 MODULE_DEVICE_TABLE(of, sun6i_a31_r_pinctrl_match);
 128
 129 static struct platform_driver sun6i_a31_r_pinctrl_driver = {
 130         .probe  = sun6i_a31_r_pinctrl_probe,
 131         .driver = {
 132                 .name           = "sun6i-a31-r-pinctrl",
 133                 .of_match_table = sun6i_a31_r_pinctrl_match,
 134         },
 135 };
 136 module_platform_driver(sun6i_a31_r_pinctrl_driver);
 137
 138 MODULE_AUTHOR("Boris Brezillon <boris.brezillon@free-electrons.com");
 139 MODULE_AUTHOR("Maxime Ripard <maxime.ripard@free-electrons.com");
 140 MODULE_DESCRIPTION("Allwinner A31 R_PIO pinctrl driver");
 141 MODULE_LICENSE("GPL");