Add a driver for Schweitzer Engineering Laboratories SEL-3350 computers
front LEDs and power supplies. LED and power supply status is provided
by the Intel SoC GPIO.
Signed-off-by: Robert Joslyn <robert.joslyn@xxxxxxxxxxxxxxxx>
---
Changes in v2:
- Adjust Kconfig to depend on GPIOLIB rather than select. This required
moving PINCTRL_BROXTON to depend on as well to avoid dependency
errors.
- Move power_supply_config structs to the stack in probe and use one
struct for both power supplies
- Remove assignement of of_node since it is already NULL
drivers/platform/x86/Kconfig | 15 ++
drivers/platform/x86/Makefile | 3 +
drivers/platform/x86/sel3350-platform.c | 251 ++++++++++++++++++++++++
3 files changed, 269 insertions(+)
create mode 100644 drivers/platform/x86/sel3350-platform.c
diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig
index 49c2c4cd8d00..acdc7925e3c2 100644
--- a/drivers/platform/x86/Kconfig
+++ b/drivers/platform/x86/Kconfig
@@ -1094,6 +1094,21 @@ config WINMATE_FM07_KEYS
buttons below the display. This module adds an input device
that delivers key events when these buttons are pressed.
+config SEL3350_PLATFORM
+ tristate "SEL-3350 LEDs and power supplies"
+ depends on ACPI
+ depends on GPIOLIB
+ depends on PINCTRL_BROXTON
+ select POWER_SUPPLY
+ select NEW_LEDS
+ select LEDS_CLASS
+ select LEDS_GPIO
+ help
+ Support for LEDs and power supplies on SEL-3350 computers.
+
+ To compile this driver as a module, choose M here: the module
+ will be called sel3350-platform.
+
endif # X86_PLATFORM_DEVICES
config P2SB
diff --git a/drivers/platform/x86/Makefile b/drivers/platform/x86/Makefile
index 52dfdf574ac2..a1e989ac0d80 100644
--- a/drivers/platform/x86/Makefile
+++ b/drivers/platform/x86/Makefile
@@ -135,3 +135,6 @@ obj-$(CONFIG_SIEMENS_SIMATIC_IPC) += simatic-ipc.o
# Winmate
obj-$(CONFIG_WINMATE_FM07_KEYS) += winmate-fm07-keys.o
+
+# SEL
+obj-$(CONFIG_SEL3350_PLATFORM) += sel3350-platform.o
diff --git a/drivers/platform/x86/sel3350-platform.c b/drivers/platform/x86/sel3350-platform.c
new file mode 100644
index 000000000000..fa267d0d3778
--- /dev/null
+++ b/drivers/platform/x86/sel3350-platform.c
@@ -0,0 +1,251 @@
+// SPDX-License-Identifier: GPL-2.0-only OR BSD-3-Clause
+/*
+ * Copyright 2023 Schweitzer Engineering Laboratories, Inc.
+ * 2350 NE Hopkins Court, Pullman, WA 99163 USA
+ *
+ * Platform support for the b2093 mainboard used in SEL-3350 computers.
+ * Consumes GPIO from the SoC to provide standard LED and power supply
+ * devices.
+ */
+
+#include <linux/acpi.h>
+#include <linux/gpio/consumer.h>
+#include <linux/gpio/machine.h>
+#include <linux/leds.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/power_supply.h>
+
+/* Broxton communities */
+#define BXT_NW "INT3452:01"
+#define BXT_W "INT3452:02"
+#define BXT_SW "INT3452:03"
+
+#define B2093_GPIO_ACPI_ID "SEL0003"
+
+#define SEL_PS_A "sel_ps_a"
+#define SEL_PS_A_DETECT "sel_ps_a_detect"
+#define SEL_PS_A_GOOD "sel_ps_a_good"
+#define SEL_PS_B "sel_ps_b"
+#define SEL_PS_B_DETECT "sel_ps_b_detect"
+#define SEL_PS_B_GOOD "sel_ps_b_good"
+
+/* LEDs */
+static const struct gpio_led sel3350_leds[] = {
+ { .name = "sel:green:aux1" },
+ { .name = "sel:green:aux2" },
+ { .name = "sel:green:aux3" },
+ { .name = "sel:green:aux4" },
+ { .name = "sel:red:alarm" },
+ { .name = "sel:green:enabled",
+ .default_state = LEDS_GPIO_DEFSTATE_ON },
+ { .name = "sel:red:aux1" },
+ { .name = "sel:red:aux2" },
+ { .name = "sel:red:aux3" },
+ { .name = "sel:red:aux4" },
+};
+
+static const struct gpio_led_platform_data sel3350_leds_pdata = {
+ .num_leds = ARRAY_SIZE(sel3350_leds),
+ .leds = sel3350_leds,
+};
+
+/* Map GPIOs to LEDs */
+static struct gpiod_lookup_table sel3350_leds_table = {
+ .dev_id = "leds-gpio",
+ .table = {
+ GPIO_LOOKUP_IDX(BXT_NW, 49, NULL, 0, GPIO_ACTIVE_HIGH),
+ GPIO_LOOKUP_IDX(BXT_NW, 50, NULL, 1, GPIO_ACTIVE_HIGH),
+ GPIO_LOOKUP_IDX(BXT_NW, 51, NULL, 2, GPIO_ACTIVE_HIGH),
+ GPIO_LOOKUP_IDX(BXT_NW, 52, NULL, 3, GPIO_ACTIVE_HIGH),
+ GPIO_LOOKUP_IDX(BXT_W, 20, NULL, 4, GPIO_ACTIVE_HIGH),
+ GPIO_LOOKUP_IDX(BXT_W, 21, NULL, 5, GPIO_ACTIVE_HIGH),
+ GPIO_LOOKUP_IDX(BXT_SW, 37, NULL, 6, GPIO_ACTIVE_HIGH),
+ GPIO_LOOKUP_IDX(BXT_SW, 38, NULL, 7, GPIO_ACTIVE_HIGH),
+ GPIO_LOOKUP_IDX(BXT_SW, 39, NULL, 8, GPIO_ACTIVE_HIGH),
+ GPIO_LOOKUP_IDX(BXT_SW, 40, NULL, 9, GPIO_ACTIVE_HIGH),
+ {},
+ }
+};
+
+/* Map GPIOs to power supplies */
+static struct gpiod_lookup_table sel3350_gpios_table = {
+ .dev_id = B2093_GPIO_ACPI_ID ":00",
+ .table = {
+ GPIO_LOOKUP(BXT_NW, 44, SEL_PS_A_DETECT, GPIO_ACTIVE_LOW),
+ GPIO_LOOKUP(BXT_NW, 45, SEL_PS_A_GOOD, GPIO_ACTIVE_LOW),
+ GPIO_LOOKUP(BXT_NW, 46, SEL_PS_B_DETECT, GPIO_ACTIVE_LOW),
+ GPIO_LOOKUP(BXT_NW, 47, SEL_PS_B_GOOD, GPIO_ACTIVE_LOW),
+ {},
+ }
+};
+
+/* Power Supplies */
+
+struct sel3350_power_cfg_data {
+ struct gpio_desc *ps_detect;
+ struct gpio_desc *ps_good;
+};
+
+static int sel3350_power_get_property(struct power_supply *psy,
+ enum power_supply_property psp,
+ union power_supply_propval *val)
+{
+ struct sel3350_power_cfg_data *data = power_supply_get_drvdata(psy);
+
+ switch (psp) {
+ case POWER_SUPPLY_PROP_HEALTH:
+ if (gpiod_get_value(data->ps_detect)) {
+ if (gpiod_get_value(data->ps_good))
+ val->intval = POWER_SUPPLY_HEALTH_GOOD;
+ else
+ val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
+ } else {
+ val->intval = POWER_SUPPLY_HEALTH_UNKNOWN;
+ }
+ break;
+ case POWER_SUPPLY_PROP_PRESENT:
+ val->intval = gpiod_get_value(data->ps_detect);
+ break;
+ case POWER_SUPPLY_PROP_ONLINE:
+ val->intval = gpiod_get_value(data->ps_good);
+ break;
+ default:
+ return -EINVAL;
+ }
+ return 0;
+}
+
+static const enum power_supply_property sel3350_power_properties[] = {
+ POWER_SUPPLY_PROP_HEALTH,
+ POWER_SUPPLY_PROP_PRESENT,
+ POWER_SUPPLY_PROP_ONLINE,
+};
+
+static const struct power_supply_desc sel3350_ps_a_desc = {
+ .name = SEL_PS_A,
+ .type = POWER_SUPPLY_TYPE_MAINS,
+ .properties = sel3350_power_properties,
+ .num_properties = ARRAY_SIZE(sel3350_power_properties),
+ .get_property = sel3350_power_get_property,
+};
+
+static const struct power_supply_desc sel3350_ps_b_desc = {
+ .name = SEL_PS_B,
+ .type = POWER_SUPPLY_TYPE_MAINS,
+ .properties = sel3350_power_properties,
+ .num_properties = ARRAY_SIZE(sel3350_power_properties),
+ .get_property = sel3350_power_get_property,
+};
+
+struct sel3350_data {
+ struct platform_device *leds_pdev;
+ struct power_supply *ps_a;
+ struct power_supply *ps_b;
+ struct sel3350_power_cfg_data ps_a_cfg_data;
+ struct sel3350_power_cfg_data ps_b_cfg_data;
+};
+
+static int sel3350_probe(struct platform_device *pdev)
+{
+ int rs;
+ struct sel3350_data *sel3350;
+ struct power_supply_config ps_cfg = {};
+
+ sel3350 = devm_kzalloc(&pdev->dev, sizeof(struct sel3350_data), GFP_KERNEL);
+ if (!sel3350)
+ return -ENOMEM;
+
+ platform_set_drvdata(pdev, sel3350);
+
+ gpiod_add_lookup_table(&sel3350_leds_table);
+ gpiod_add_lookup_table(&sel3350_gpios_table);
+
+ sel3350->leds_pdev = platform_device_register_data(
+ NULL,
+ "leds-gpio",
+ PLATFORM_DEVID_NONE,
+ &sel3350_leds_pdata,
+ sizeof(sel3350_leds_pdata));
+ if (IS_ERR(sel3350->leds_pdev)) {
+ rs = PTR_ERR(sel3350->leds_pdev);
+ dev_err(&pdev->dev, "Failed registering platform device: %d\n", rs);
+ goto err_platform;
+ }
+
+ /* Power Supply A */
+ sel3350->ps_a_cfg_data.ps_detect = devm_gpiod_get(&pdev->dev,
+ SEL_PS_A_DETECT,
+ GPIOD_IN);
+ sel3350->ps_a_cfg_data.ps_good = devm_gpiod_get(&pdev->dev,
+ SEL_PS_A_GOOD,
+ GPIOD_IN);
+ ps_cfg.drv_data = &sel3350->ps_a_cfg_data;
+ sel3350->ps_a = devm_power_supply_register(&pdev->dev,
+ &sel3350_ps_a_desc,
+ &ps_cfg);
+ if (IS_ERR(sel3350->ps_a)) {
+ rs = PTR_ERR(sel3350->ps_a);
+ dev_err(&pdev->dev, "Failed registering power supply A: %d\n", rs);
+ goto err_ps;
+ }
+
+ /* Power Supply B */
+ sel3350->ps_b_cfg_data.ps_detect = devm_gpiod_get(&pdev->dev,
+ SEL_PS_B_DETECT,
+ GPIOD_IN);
+ sel3350->ps_b_cfg_data.ps_good = devm_gpiod_get(&pdev->dev,
+ SEL_PS_B_GOOD,
+ GPIOD_IN);
+ ps_cfg.drv_data = &sel3350->ps_b_cfg_data;
+ sel3350->ps_b = devm_power_supply_register(&pdev->dev,
+ &sel3350_ps_b_desc,
+ &ps_cfg);
+ if (IS_ERR(sel3350->ps_b)) {
+ rs = PTR_ERR(sel3350->ps_b);
+ dev_err(&pdev->dev, "Failed registering power supply B: %d\n", rs);
+ goto err_ps;
+ }
+
+ return 0;
+
+err_ps:
+ platform_device_unregister(sel3350->leds_pdev);
+err_platform:
+ gpiod_remove_lookup_table(&sel3350_gpios_table);
+ gpiod_remove_lookup_table(&sel3350_leds_table);
+
+ return rs;
+}
+
+static int sel3350_remove(struct platform_device *pdev)
+{
+ struct sel3350_data *sel3350 = platform_get_drvdata(pdev);
+
+ platform_device_unregister(sel3350->leds_pdev);
+ gpiod_remove_lookup_table(&sel3350_gpios_table);
+ gpiod_remove_lookup_table(&sel3350_leds_table);
+
+ return 0;
+}
+
+static const struct acpi_device_id sel3350_device_ids[] = {
+ { B2093_GPIO_ACPI_ID, 0 },
+ { "", 0 },
+};
+MODULE_DEVICE_TABLE(acpi, sel3350_device_ids);
+
+static struct platform_driver sel3350_platform_driver = {
+ .probe = sel3350_probe,
+ .remove = sel3350_remove,
+ .driver = {
+ .name = "sel3350-platform",
+ .acpi_match_table = sel3350_device_ids,
+ },
+};
+module_platform_driver(sel3350_platform_driver);
+
+MODULE_AUTHOR("Schweitzer Engineering Laboratories");
+MODULE_DESCRIPTION("SEL-3350 platform driver");
+MODULE_LICENSE("Dual BSD/GPL");
+MODULE_SOFTDEP("pre: pinctrl_broxton leds-gpio");
--
2.41.0
