target/linux/x86/patches-5.10/102-v5.15-platform-x86-add-meraki-mx100-platform-driver.patch

   1 From 636a1e697555e73c28cdd6952a409edbfdd16475 Mon Sep 17 00:00:00 2001
   2 From: Chris Blake <chrisrblake93@gmail.com>
   3 Date: Mon, 9 Aug 2021 19:40:21 -0500
   4 Subject: platform/x86: add meraki-mx100 platform driver
   5
   6 This adds platform support for the Cisco Meraki MX100 (Tinkerbell)
   7 network appliance. This sets up the network LEDs and Reset
   8 button.
   9
  10 Depends-on: ef0eea5b151ae ("mfd: lpc_ich: Enable GPIO driver for DH89xxCC")
  11 Co-developed-by: Christian Lamparter <chunkeey@gmail.com>
  12 Signed-off-by: Christian Lamparter <chunkeey@gmail.com>
  13 Signed-off-by: Chris Blake <chrisrblake93@gmail.com>
  14 Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
  15 Link: https://lore.kernel.org/r/20210810004021.2538308-1-chrisrblake93@gmail.com
  16 Reviewed-by: Hans de Goede <hdegoede@redhat.com>
  17 Signed-off-by: Hans de Goede <hdegoede@redhat.com>
  18 ---
  19  drivers/platform/x86/Kconfig        |  13 ++
  20  drivers/platform/x86/Makefile       |   3 +
  21  drivers/platform/x86/meraki-mx100.c | 230 ++++++++++++++++++++++++++++++++++++
  22  3 files changed, 246 insertions(+)
  23  create mode 100644 drivers/platform/x86/meraki-mx100.c
  24
  25 diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig
  26 index 6ad35158ae4ef..432d72170b003 100644
  27 --- a/drivers/platform/x86/Kconfig
  28 +++ b/drivers/platform/x86/Kconfig
  29 @@ -302,6 +302,19 @@ config ASUS_NB_WMI
  30           If you have an ACPI-WMI compatible Asus Notebook, say Y or M
  31           here.
  32
  33 +config MERAKI_MX100
  34 +       tristate "Cisco Meraki MX100 Platform Driver"
  35 +       depends on GPIOLIB
  36 +       depends on GPIO_ICH
  37 +       depends on LEDS_CLASS
  38 +       select LEDS_GPIO
  39 +       help
  40 +         This driver provides support for the front button and LEDs on
  41 +         the Cisco Meraki MX100 (Tinkerbell) 1U appliance.
  42 +
  43 +         To compile this driver as a module, choose M here: the module
  44 +         will be called meraki-mx100.
  45 +
  46  config EEEPC_LAPTOP
  47         tristate "Eee PC Hotkey Driver"
  48         depends on ACPI
  49 diff --git a/drivers/platform/x86/Makefile b/drivers/platform/x86/Makefile
  50 index 5edfdc2ea7f29..9bb3c3f773864 100644
  51 --- a/drivers/platform/x86/Makefile
  52 +++ b/drivers/platform/x86/Makefile
  53 @@ -39,6 +39,9 @@ obj-$(CONFIG_ASUS_NB_WMI)     += asus-nb-wmi.o
  54  obj-$(CONFIG_EEEPC_LAPTOP)     += eeepc-laptop.o
  55  obj-$(CONFIG_EEEPC_WMI)                += eeepc-wmi.o
  56
  57 +# Cisco/Meraki
  58 +obj-$(CONFIG_MERAKI_MX100)     += meraki-mx100.o
  59 +
  60  # Dell
  61  obj-$(CONFIG_X86_PLATFORM_DRIVERS_DELL)                += dell/
  62
  63 diff --git a/drivers/platform/x86/meraki-mx100.c b/drivers/platform/x86/meraki-mx100.c
  64 new file mode 100644
  65 index 0000000000000..3751ed36a980a
  66 --- /dev/null
  67 +++ b/drivers/platform/x86/meraki-mx100.c
  68 @@ -0,0 +1,230 @@
  69 +// SPDX-License-Identifier: GPL-2.0+
  70 +
  71 +/*
  72 + * Cisco Meraki MX100 (Tinkerbell) board platform driver
  73 + *
  74 + * Based off of arch/x86/platform/meraki/tink.c from the
  75 + * Meraki GPL release meraki-firmware-sources-r23-20150601
  76 + *
  77 + * Format inspired by platform/x86/pcengines-apuv2.c
  78 + *
  79 + * Copyright (C) 2021 Chris Blake <chrisrblake93@gmail.com>
  80 + */
  81 +
  82 +#define pr_fmt(fmt)    KBUILD_MODNAME ": " fmt
  83 +
  84 +#include <linux/dmi.h>
  85 +#include <linux/err.h>
  86 +#include <linux/gpio_keys.h>
  87 +#include <linux/gpio/machine.h>
  88 +#include <linux/input.h>
  89 +#include <linux/io.h>
  90 +#include <linux/kernel.h>
  91 +#include <linux/leds.h>
  92 +#include <linux/module.h>
  93 +#include <linux/platform_device.h>
  94 +
  95 +#define TINK_GPIO_DRIVER_NAME "gpio_ich"
  96 +
  97 +/* LEDs */
  98 +static const struct gpio_led tink_leds[] = {
  99 +       {
 100 +               .name = "mx100:green:internet",
 101 +               .default_trigger = "default-on",
 102 +       },
 103 +       {
 104 +               .name = "mx100:green:lan2",
 105 +       },
 106 +       {
 107 +               .name = "mx100:green:lan3",
 108 +       },
 109 +       {
 110 +               .name = "mx100:green:lan4",
 111 +       },
 112 +       {
 113 +               .name = "mx100:green:lan5",
 114 +       },
 115 +       {
 116 +               .name = "mx100:green:lan6",
 117 +       },
 118 +       {
 119 +               .name = "mx100:green:lan7",
 120 +       },
 121 +       {
 122 +               .name = "mx100:green:lan8",
 123 +       },
 124 +       {
 125 +               .name = "mx100:green:lan9",
 126 +       },
 127 +       {
 128 +               .name = "mx100:green:lan10",
 129 +       },
 130 +       {
 131 +               .name = "mx100:green:lan11",
 132 +       },
 133 +       {
 134 +               .name = "mx100:green:ha",
 135 +       },
 136 +       {
 137 +               .name = "mx100:orange:ha",
 138 +       },
 139 +       {
 140 +               .name = "mx100:green:usb",
 141 +       },
 142 +       {
 143 +               .name = "mx100:orange:usb",
 144 +       },
 145 +};
 146 +
 147 +static const struct gpio_led_platform_data tink_leds_pdata = {
 148 +       .num_leds       = ARRAY_SIZE(tink_leds),
 149 +       .leds           = tink_leds,
 150 +};
 151 +
 152 +static struct gpiod_lookup_table tink_leds_table = {
 153 +       .dev_id = "leds-gpio",
 154 +       .table = {
 155 +               GPIO_LOOKUP_IDX(TINK_GPIO_DRIVER_NAME, 11,
 156 +                               NULL, 0, GPIO_ACTIVE_LOW),
 157 +               GPIO_LOOKUP_IDX(TINK_GPIO_DRIVER_NAME, 18,
 158 +                               NULL, 1, GPIO_ACTIVE_HIGH),
 159 +               GPIO_LOOKUP_IDX(TINK_GPIO_DRIVER_NAME, 20,
 160 +                               NULL, 2, GPIO_ACTIVE_HIGH),
 161 +               GPIO_LOOKUP_IDX(TINK_GPIO_DRIVER_NAME, 22,
 162 +                               NULL, 3, GPIO_ACTIVE_HIGH),
 163 +               GPIO_LOOKUP_IDX(TINK_GPIO_DRIVER_NAME, 23,
 164 +                               NULL, 4, GPIO_ACTIVE_HIGH),
 165 +               GPIO_LOOKUP_IDX(TINK_GPIO_DRIVER_NAME, 32,
 166 +                               NULL, 5, GPIO_ACTIVE_HIGH),
 167 +               GPIO_LOOKUP_IDX(TINK_GPIO_DRIVER_NAME, 34,
 168 +                               NULL, 6, GPIO_ACTIVE_HIGH),
 169 +               GPIO_LOOKUP_IDX(TINK_GPIO_DRIVER_NAME, 35,
 170 +                               NULL, 7, GPIO_ACTIVE_HIGH),
 171 +               GPIO_LOOKUP_IDX(TINK_GPIO_DRIVER_NAME, 36,
 172 +                               NULL, 8, GPIO_ACTIVE_HIGH),
 173 +               GPIO_LOOKUP_IDX(TINK_GPIO_DRIVER_NAME, 37,
 174 +                               NULL, 9, GPIO_ACTIVE_HIGH),
 175 +               GPIO_LOOKUP_IDX(TINK_GPIO_DRIVER_NAME, 48,
 176 +                               NULL, 10, GPIO_ACTIVE_HIGH),
 177 +               GPIO_LOOKUP_IDX(TINK_GPIO_DRIVER_NAME, 16,
 178 +                               NULL, 11, GPIO_ACTIVE_LOW),
 179 +               GPIO_LOOKUP_IDX(TINK_GPIO_DRIVER_NAME, 7,
 180 +                               NULL, 12, GPIO_ACTIVE_LOW),
 181 +               GPIO_LOOKUP_IDX(TINK_GPIO_DRIVER_NAME, 21,
 182 +                               NULL, 13, GPIO_ACTIVE_LOW),
 183 +               GPIO_LOOKUP_IDX(TINK_GPIO_DRIVER_NAME, 19,
 184 +                               NULL, 14, GPIO_ACTIVE_LOW),
 185 +               {} /* Terminating entry */
 186 +       }
 187 +};
 188 +
 189 +/* Reset Button */
 190 +static struct gpio_keys_button tink_buttons[] = {
 191 +       {
 192 +               .desc                   = "Reset",
 193 +               .type                   = EV_KEY,
 194 +               .code                   = KEY_RESTART,
 195 +               .active_low             = 1,
 196 +               .debounce_interval      = 100,
 197 +       },
 198 +};
 199 +
 200 +static const struct gpio_keys_platform_data tink_buttons_pdata = {
 201 +       .buttons        = tink_buttons,
 202 +       .nbuttons       = ARRAY_SIZE(tink_buttons),
 203 +       .poll_interval  = 20,
 204 +       .rep            = 0,
 205 +       .name           = "mx100-keys",
 206 +};
 207 +
 208 +static struct gpiod_lookup_table tink_keys_table = {
 209 +       .dev_id = "gpio-keys-polled",
 210 +       .table = {
 211 +               GPIO_LOOKUP_IDX(TINK_GPIO_DRIVER_NAME, 60,
 212 +                               NULL, 0, GPIO_ACTIVE_LOW),
 213 +               {} /* Terminating entry */
 214 +       }
 215 +};
 216 +
 217 +/* Board setup */
 218 +static const struct dmi_system_id tink_systems[] __initconst = {
 219 +       {
 220 +               .matches = {
 221 +                       DMI_EXACT_MATCH(DMI_SYS_VENDOR, "Cisco"),
 222 +                       DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "MX100-HW"),
 223 +               },
 224 +       },
 225 +       {} /* Terminating entry */
 226 +};
 227 +MODULE_DEVICE_TABLE(dmi, tink_systems);
 228 +
 229 +static struct platform_device *tink_leds_pdev;
 230 +static struct platform_device *tink_keys_pdev;
 231 +
 232 +static struct platform_device * __init tink_create_dev(
 233 +       const char *name, const void *pdata, size_t sz)
 234 +{
 235 +       struct platform_device *pdev;
 236 +
 237 +       pdev = platform_device_register_data(NULL,
 238 +               name, PLATFORM_DEVID_NONE, pdata, sz);
 239 +       if (IS_ERR(pdev))
 240 +               pr_err("failed registering %s: %ld\n", name, PTR_ERR(pdev));
 241 +
 242 +       return pdev;
 243 +}
 244 +
 245 +static int __init tink_board_init(void)
 246 +{
 247 +       int ret;
 248 +
 249 +       if (!dmi_first_match(tink_systems))
 250 +               return -ENODEV;
 251 +
 252 +       /*
 253 +        * We need to make sure that GPIO60 isn't set to native mode as is default since it's our
 254 +        * Reset Button. To do this, write to GPIO_USE_SEL2 to have GPIO60 set to GPIO mode.
 255 +        * This is documented on page 1609 of the PCH datasheet, order number 327879-005US
 256 +        */
 257 +       outl(inl(0x530) | BIT(28), 0x530);
 258 +
 259 +       gpiod_add_lookup_table(&tink_leds_table);
 260 +       gpiod_add_lookup_table(&tink_keys_table);
 261 +
 262 +       tink_leds_pdev = tink_create_dev("leds-gpio",
 263 +               &tink_leds_pdata, sizeof(tink_leds_pdata));
 264 +       if (IS_ERR(tink_leds_pdev)) {
 265 +               ret = PTR_ERR(tink_leds_pdev);
 266 +               goto err;
 267 +       }
 268 +
 269 +       tink_keys_pdev = tink_create_dev("gpio-keys-polled",
 270 +               &tink_buttons_pdata, sizeof(tink_buttons_pdata));
 271 +       if (IS_ERR(tink_keys_pdev)) {
 272 +               ret = PTR_ERR(tink_keys_pdev);
 273 +               platform_device_unregister(tink_leds_pdev);
 274 +               goto err;
 275 +       }
 276 +
 277 +       return 0;
 278 +
 279 +err:
 280 +       gpiod_remove_lookup_table(&tink_keys_table);
 281 +       gpiod_remove_lookup_table(&tink_leds_table);
 282 +       return ret;
 283 +}
 284 +module_init(tink_board_init);
 285 +
 286 +static void __exit tink_board_exit(void)
 287 +{
 288 +       platform_device_unregister(tink_keys_pdev);
 289 +       platform_device_unregister(tink_leds_pdev);
 290 +       gpiod_remove_lookup_table(&tink_keys_table);
 291 +       gpiod_remove_lookup_table(&tink_leds_table);
 292 +}
 293 +module_exit(tink_board_exit);
 294 +
 295 +MODULE_AUTHOR("Chris Blake <chrisrblake93@gmail.com>");
 296 +MODULE_DESCRIPTION("Cisco Meraki MX100 Platform Driver");
 297 +MODULE_LICENSE("GPL");
 298 +MODULE_ALIAS("platform:meraki-mx100");
 299 --
 300 cgit 1.2.3-1.el7