target/linux/bcm63xx/patches-4.19/130-pinctrl-add-bcm63xx-base-code.patch

   1 From ab2f33e35e35905a76204138143875251f3e1088 Mon Sep 17 00:00:00 2001
   2 From: Jonas Gorski <jonas.gorski@gmail.com>
   3 Date: Fri, 24 Jun 2016 22:07:42 +0200
   4 Subject: [PATCH 01/13] pinctrl: add bcm63xx base code
   5
   6 Setup directory and add a helper for bcm63xx pinctrl support.
   7
   8 Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
   9 ---
  10  drivers/pinctrl/Kconfig                   |   1 +
  11  drivers/pinctrl/Makefile                  |   1 +
  12  drivers/pinctrl/bcm63xx/Kconfig           |   3 +
  13  drivers/pinctrl/bcm63xx/Makefile          |   1 +
  14  drivers/pinctrl/bcm63xx/pinctrl-bcm63xx.c | 142 ++++++++++++++++++++++++++++++
  15  drivers/pinctrl/bcm63xx/pinctrl-bcm63xx.h |  14 +++
  16  7 files changed, 163 insertions(+)
  17  create mode 100644 drivers/pinctrl/bcm63xx/Kconfig
  18  create mode 100644 drivers/pinctrl/bcm63xx/Makefile
  19  create mode 100644 drivers/pinctrl/bcm63xx/pinctrl-bcm63xx.c
  20  create mode 100644 drivers/pinctrl/bcm63xx/pinctrl-bcm63xx.h
  21
  22 --- a/drivers/pinctrl/Kconfig
  23 +++ b/drivers/pinctrl/Kconfig
  24 @@ -341,6 +341,7 @@ config PINCTRL_OCELOT
  25  source "drivers/pinctrl/actions/Kconfig"
  26  source "drivers/pinctrl/aspeed/Kconfig"
  27  source "drivers/pinctrl/bcm/Kconfig"
  28 +source "drivers/pinctrl/bcm63xx/Kconfig"
  29  source "drivers/pinctrl/berlin/Kconfig"
  30  source "drivers/pinctrl/freescale/Kconfig"
  31  source "drivers/pinctrl/intel/Kconfig"
  32 --- a/drivers/pinctrl/Makefile
  33 +++ b/drivers/pinctrl/Makefile
  34 @@ -46,6 +46,7 @@ obj-$(CONFIG_PINCTRL_OCELOT)  += pinctrl-
  35  obj-y                          += actions/
  36  obj-$(CONFIG_ARCH_ASPEED)      += aspeed/
  37  obj-y                          += bcm/
  38 +obj-y                          += bcm63xx/
  39  obj-$(CONFIG_PINCTRL_BERLIN)   += berlin/
  40  obj-y                          += freescale/
  41  obj-$(CONFIG_X86)              += intel/
  42 --- /dev/null
  43 +++ b/drivers/pinctrl/bcm63xx/Kconfig
  44 @@ -0,0 +1,3 @@
  45 +config PINCTRL_BCM63XX
  46 +       bool
  47 +       select GPIO_GENERIC
  48 --- /dev/null
  49 +++ b/drivers/pinctrl/bcm63xx/Makefile
  50 @@ -0,0 +1 @@
  51 +obj-$(CONFIG_PINCTRL_BCM63XX)  += pinctrl-bcm63xx.o
  52 --- /dev/null
  53 +++ b/drivers/pinctrl/bcm63xx/pinctrl-bcm63xx.c
  54 @@ -0,0 +1,155 @@
  55 +/*
  56 + * This file is subject to the terms and conditions of the GNU General Public
  57 + * License.  See the file "COPYING" in the main directory of this archive
  58 + * for more details.
  59 + *
  60 + * Copyright (C) 2016 Jonas Gorski <jonas.gorski@gmail.com>
  61 + */
  62 +
  63 +#include <linux/bitops.h>
  64 +#include <linux/device.h>
  65 +#include <linux/gpio/driver.h>
  66 +#include <linux/of_irq.h>
  67 +
  68 +#include "pinctrl-bcm63xx.h"
  69 +#include "../core.h"
  70 +
  71 +#define BANK_SIZE      sizeof(u32)
  72 +#define PINS_PER_BANK  (BANK_SIZE * BITS_PER_BYTE)
  73 +
  74 +#ifdef CONFIG_OF
  75 +static int bcm63xx_gpio_of_xlate(struct gpio_chip *gc,
  76 +                                const struct of_phandle_args *gpiospec,
  77 +                                u32 *flags)
  78 +{
  79 +       struct gpio_chip *base = gpiochip_get_data(gc);
  80 +       int pin = gpiospec->args[0];
  81 +
  82 +       if (gc != &base[pin / PINS_PER_BANK])
  83 +               return -EINVAL;
  84 +
  85 +       pin = pin % PINS_PER_BANK;
  86 +
  87 +       if (pin >= gc->ngpio)
  88 +               return -EINVAL;
  89 +
  90 +       if (flags)
  91 +               *flags = gpiospec->args[1];
  92 +
  93 +       return pin;
  94 +}
  95 +#endif
  96 +
  97 +static int bcm63xx_gpio_to_irq(struct gpio_chip *chip, unsigned gpio)
  98 +{
  99 +       struct gpio_chip *base = gpiochip_get_data(chip);
 100 +       char irq_name[7]; /* "gpioXX" */
 101 +
 102 +       /* FIXME: this is ugly */
 103 +       sprintf(irq_name, "gpio%d", gpio + PINS_PER_BANK * (chip - base));
 104 +       return of_irq_get_byname(chip->of_node, irq_name);
 105 +}
 106 +
 107 +static int bcm63xx_setup_gpio(struct device *dev, struct gpio_chip *gc,
 108 +                             void __iomem *dirout, void __iomem *data,
 109 +                             size_t sz, int ngpio)
 110 +
 111 +{
 112 +       int banks, chips, i, ret = -EINVAL;
 113 +
 114 +       chips = DIV_ROUND_UP(ngpio, PINS_PER_BANK);
 115 +       banks = sz / BANK_SIZE;
 116 +
 117 +       for (i = 0; i < chips; i++) {
 118 +               int offset, pins;
 119 +               int reg_offset;
 120 +               char *label;
 121 +
 122 +               label = devm_kasprintf(dev, GFP_KERNEL, "bcm63xx-gpio.%i", i);
 123 +               if (!label)
 124 +                       return -ENOMEM;
 125 +
 126 +               offset = i * PINS_PER_BANK;
 127 +               pins = min_t(int, ngpio - offset, PINS_PER_BANK);
 128 +
 129 +               /* the registers are treated like a huge big endian register */
 130 +               reg_offset = (banks - i - 1) * BANK_SIZE;
 131 +
 132 +               ret = bgpio_init(&gc[i], dev, BANK_SIZE, data + reg_offset,
 133 +                                NULL, NULL, dirout + reg_offset, NULL,
 134 +                                BGPIOF_BIG_ENDIAN_BYTE_ORDER);
 135 +               if (ret)
 136 +                       return ret;
 137 +
 138 +               gc[i].request = gpiochip_generic_request;
 139 +               gc[i].free = gpiochip_generic_free;
 140 +
 141 +               if (of_get_property(dev->of_node, "interrupt-names", NULL))
 142 +                       gc[i].to_irq = bcm63xx_gpio_to_irq;
 143 +
 144 +#ifdef CONFIG_OF
 145 +               gc[i].of_gpio_n_cells = 2;
 146 +               gc[i].of_xlate = bcm63xx_gpio_of_xlate;
 147 +#endif
 148 +
 149 +               gc[i].label = label;
 150 +               gc[i].ngpio = pins;
 151 +
 152 +               devm_gpiochip_add_data(dev, &gc[i], gc);
 153 +       }
 154 +
 155 +       return 0;
 156 +}
 157 +
 158 +static void bcm63xx_setup_pinranges(struct gpio_chip *gc, const char *name,
 159 +                                   int ngpio)
 160 +{
 161 +       int i, chips = DIV_ROUND_UP(ngpio, PINS_PER_BANK);
 162 +
 163 +       for (i = 0; i < chips; i++) {
 164 +               int offset, pins;
 165 +
 166 +               offset = i * PINS_PER_BANK;
 167 +               pins = min_t(int, ngpio - offset, PINS_PER_BANK);
 168 +
 169 +               gpiochip_add_pin_range(&gc[i], name, 0, offset, pins);
 170 +       }
 171 +}
 172 +
 173 +struct pinctrl_dev *bcm63xx_pinctrl_register(struct platform_device *pdev,
 174 +                                            struct pinctrl_desc *desc,
 175 +                                            void *priv, struct gpio_chip *gc,
 176 +                                            int ngpio)
 177 +{
 178 +       struct pinctrl_dev *pctldev;
 179 +       struct resource *res;
 180 +       void __iomem *dirout, *data;
 181 +       size_t sz;
 182 +       int ret;
 183 +
 184 +       res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dirout");
 185 +       dirout = devm_ioremap_resource(&pdev->dev, res);
 186 +       if (IS_ERR(dirout))
 187 +               return ERR_CAST(dirout);
 188 +
 189 +       res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dat");
 190 +       data = devm_ioremap_resource(&pdev->dev, res);
 191 +       if (IS_ERR(data))
 192 +               return ERR_CAST(data);
 193 +
 194 +       sz = resource_size(res);
 195 +
 196 +       ret = bcm63xx_setup_gpio(&pdev->dev, gc, dirout, data, sz, ngpio);
 197 +       if (ret)
 198 +               return ERR_PTR(ret);
 199 +
 200 +       pctldev = devm_pinctrl_register(&pdev->dev, desc, priv);
 201 +       if (IS_ERR(pctldev))
 202 +               return pctldev;
 203 +
 204 +       bcm63xx_setup_pinranges(gc, pinctrl_dev_get_devname(pctldev), ngpio);
 205 +
 206 +       dev_info(&pdev->dev, "registered at mmio %p\n", dirout);
 207 +
 208 +       return pctldev;
 209 +}
 210 --- /dev/null
 211 +++ b/drivers/pinctrl/bcm63xx/pinctrl-bcm63xx.h
 212 @@ -0,0 +1,14 @@
 213 +#ifndef __PINCTRL_BCM63XX
 214 +#define __PINCTRL_BCM63XX
 215 +
 216 +#include <linux/kernel.h>
 217 +#include <linux/gpio.h>
 218 +#include <linux/pinctrl/pinctrl.h>
 219 +#include <linux/platform_device.h>
 220 +
 221 +struct pinctrl_dev *bcm63xx_pinctrl_register(struct platform_device *pdev,
 222 +                                            struct pinctrl_desc *desc,
 223 +                                            void *priv, struct gpio_chip *gc,
 224 +                                            int ngpio);
 225 +
 226 +#endif