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[47.12.4.136]) by smtp.gmail.com with ESMTPSA id b24sm9524823iob.4.2021.07.06.11.47.38 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 06 Jul 2021 11:47:39 -0700 (PDT) From: Chris Blake To: platform-driver-x86@vger.kernel.org, linux-gpio@vger.kernel.org, chunkeey@gmail.com Cc: Chris Blake Subject: [PATCH] platform/x86: add meraki-mx100 platform driver Date: Tue, 6 Jul 2021 13:47:30 -0500 Message-Id: <20210706184730.14951-1-chrisrblake93@gmail.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-gpio@vger.kernel.org This adds platform support for the Cisco Meraki MX100 (Tinkerbell) network appliance. This sets up the network LEDs and Reset button. Note that this patch requires mfd: lpc_ich: Enable GPIO driver for DH89xxCC which has been accepted and is currently targeted for 5.15. Signed-off-by: Chris Blake Co-developed-by: Christian Lamparter --- drivers/platform/x86/Kconfig | 13 ++ drivers/platform/x86/Makefile | 3 + drivers/platform/x86/meraki-mx100.c | 185 ++++++++++++++++++++++++++++ 3 files changed, 201 insertions(+) create mode 100644 drivers/platform/x86/meraki-mx100.c diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig index 7d385c3b2239..8d70176e335f 100644 --- a/drivers/platform/x86/Kconfig +++ b/drivers/platform/x86/Kconfig @@ -302,6 +302,19 @@ config ASUS_NB_WMI If you have an ACPI-WMI compatible Asus Notebook, say Y or M here. +config MERAKI_MX100 + tristate "Cisco Meraki MX100 Platform Driver" + depends on GPIOLIB + depends on GPIO_ICH + depends on LEDS_CLASS + select LEDS_GPIO + help + This driver provides support for the front button and LEDs on + the Cisco Meraki MX100 (Tinkerbell) 1U appliance. + + To compile this driver as a module, choose M here: the module + will be called meraki-mx100. + config EEEPC_LAPTOP tristate "Eee PC Hotkey Driver" depends on ACPI diff --git a/drivers/platform/x86/Makefile b/drivers/platform/x86/Makefile index 7ee369aab10d..25c5aee1cde7 100644 --- a/drivers/platform/x86/Makefile +++ b/drivers/platform/x86/Makefile @@ -39,6 +39,9 @@ obj-$(CONFIG_ASUS_NB_WMI) += asus-nb-wmi.o obj-$(CONFIG_EEEPC_LAPTOP) += eeepc-laptop.o obj-$(CONFIG_EEEPC_WMI) += eeepc-wmi.o +# Cisco/Meraki +obj-$(CONFIG_MERAKI_MX100) += meraki-mx100.o + # Dell obj-$(CONFIG_X86_PLATFORM_DRIVERS_DELL) += dell/ diff --git a/drivers/platform/x86/meraki-mx100.c b/drivers/platform/x86/meraki-mx100.c new file mode 100644 index 000000000000..12b17ef06d14 --- /dev/null +++ b/drivers/platform/x86/meraki-mx100.c @@ -0,0 +1,185 @@ +// SPDX-License-Identifier: GPL-2.0+ + +/* + * Cisco Meraki MX100 (Tinkerbell) board platform driver + * + * Based off of arch/x86/platform/meraki/tink.c from the + * Meraki GPL release meraki-firmware-sources-r23-20150601 + * + * Format inspired by platform/x86/pcengines-apuv2.c + * + * Copyright (C) 2021 Chris Blake + */ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define TINK_GPIO_OFFSET 436 + +/* LEDs */ +static const struct gpio_led tink_leds[] = { + { + .name = "mx100:green:internet", + .gpio = TINK_GPIO_OFFSET + 11, + .active_low = 1, + .default_trigger = "default-on", + }, + { + .name = "mx100:green:lan2", + .gpio = TINK_GPIO_OFFSET + 18, + }, + { + .name = "mx100:green:lan3", + .gpio = TINK_GPIO_OFFSET + 20, + }, + { + .name = "mx100:green:lan4", + .gpio = TINK_GPIO_OFFSET + 22, + }, + { + .name = "mx100:green:lan5", + .gpio = TINK_GPIO_OFFSET + 23, + }, + { + .name = "mx100:green:lan6", + .gpio = TINK_GPIO_OFFSET + 32, + }, + { + .name = "mx100:green:lan7", + .gpio = TINK_GPIO_OFFSET + 34, + }, + { + .name = "mx100:green:lan8", + .gpio = TINK_GPIO_OFFSET + 35, + }, + { + .name = "mx100:green:lan9", + .gpio = TINK_GPIO_OFFSET + 36, + }, + { + .name = "mx100:green:lan10", + .gpio = TINK_GPIO_OFFSET + 37, + }, + { + .name = "mx100:green:lan11", + .gpio = TINK_GPIO_OFFSET + 48, + }, + { + .name = "mx100:green:ha", + .gpio = TINK_GPIO_OFFSET + 16, + .active_low = 1, + }, + { + .name = "mx100:orange:ha", + .gpio = TINK_GPIO_OFFSET + 7, + .active_low = 1, + }, + { + .name = "mx100:green:usb", + .gpio = TINK_GPIO_OFFSET + 21, + .active_low = 1, + }, + { + .name = "mx100:orange:usb", + .gpio = TINK_GPIO_OFFSET + 19, + .active_low = 1, + }, +}; + +static const struct gpio_led_platform_data tink_leds_pdata = { + .num_leds = ARRAY_SIZE(tink_leds), + .leds = tink_leds, +}; + +/* Reset Button */ +static struct gpio_keys_button tink_buttons[] = { + { + .desc = "Reset", + .type = EV_KEY, + .code = KEY_RESTART, + .gpio = TINK_GPIO_OFFSET + 60, + .active_low = 1, + .debounce_interval = 100, + }, +}; + +static const struct gpio_keys_platform_data tink_buttons_pdata = { + .buttons = tink_buttons, + .nbuttons = ARRAY_SIZE(tink_buttons), + .poll_interval = 20, + .rep = 0, + .name = "mx100-keys", +}; + +/* Board setup */ + +static struct platform_device *tink_leds_pdev; +static struct platform_device *tink_keys_pdev; + +static struct platform_device * __init tink_create_dev( + const char *name, + const void *pdata, + size_t sz) +{ + struct platform_device *pdev; + + pdev = platform_device_register_data(NULL, + name, + PLATFORM_DEVID_NONE, + pdata, + sz); + + if (IS_ERR(pdev)) + pr_err("failed registering %s: %ld\n", name, PTR_ERR(pdev)); + + return pdev; +} + +static int __init tink_board_init(void) +{ + if (!dmi_match(DMI_SYS_VENDOR, "Cisco") || !dmi_match(DMI_PRODUCT_NAME, "MX100-HW")) { + return -ENODEV; + } + + /* We need to make sure that GPIO60 isn't set to native mode as is default since it's our + * Reset Button. To do this, write to GPIO_USE_SEL2 to have GPIO60 set to GPIO mode. + * This is documented on page 1609 of the PCH datasheet, order number 327879-005US + */ + outl(inl(0x530) | BIT(28), 0x530); + + tink_leds_pdev = tink_create_dev( + "leds-gpio", + &tink_leds_pdata, + sizeof(tink_leds_pdata)); + + tink_keys_pdev = tink_create_dev( + "gpio-keys-polled", + &tink_buttons_pdata, + sizeof(tink_buttons_pdata)); + + return 0; +} + +static void __exit tink_board_exit(void) +{ + platform_device_unregister(tink_keys_pdev); + platform_device_unregister(tink_leds_pdev); +} + +module_init(tink_board_init); +module_exit(tink_board_exit); + +MODULE_AUTHOR("Chris Blake "); +MODULE_DESCRIPTION("Cisco Meraki MX100 Platform Driver"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:meraki-mx100"); +MODULE_SOFTDEP("pre: platform:gpio_ich platform:leds-gpio platform:gpio_keys_polled");