diff options
Diffstat (limited to 'drivers/platform/x86/sel3350-platform.c')
| -rw-r--r-- | drivers/platform/x86/sel3350-platform.c | 251 |
1 files changed, 251 insertions, 0 deletions
diff --git a/drivers/platform/x86/sel3350-platform.c b/drivers/platform/x86/sel3350-platform.c new file mode 100644 index 0000000000..fa267d0d37 --- /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"); |