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 <chrisrblake93@xxxxxxxxx>
Co-developed-by: Christian Lamparter <chunkeey@xxxxxxxxx>
---
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 <chrisrblake93@xxxxxxxxx>
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/dmi.h>
+#include <linux/err.h>
+#include <linux/gpio.h>
+#include <linux/gpio_keys.h>
+#include <linux/input.h>
+#include <linux/kernel.h>
+#include <linux/leds.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+
+#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 <chrisrblake93@xxxxxxxxx>");
+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");
--
2.25.1
