platform/x86: int3472: Make regulator supply name configurable

This is a preparation patch for registering multiple regulators, which
requires a different supply-name for each regulator. Make supply-name
a parameter to skl_int3472_register_regulator() and use con-id to set it
so that the existing int3472_gpio_map remapping can be used with it.

Since supply-name is a parameter now, drop the fixed
skl_int3472_regulator_map_supplies[] array and instead add lower- and
upper-case mappings of the passed-in supply-name to the regulator.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Andy Shevchenko <andy@kernel.org>
Tested-by: David Heidelberg <david@ixit.cz>  # Dell Latitude 9440
Reviewed-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Link: https://lore.kernel.org/r/20250417111337.38142-6-hdegoede@redhat.com
[ij: GPIO_SUPPPLY_NAME_LENGTH -> GPIO_SUPPLY_NAME_LENGTH]
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>

diff --git a/drivers/platform/x86/intel/int3472/clk_and_regulator.c b/drivers/platform/x86/intel/int3472/clk_and_regulator.c
index 374a99d..1d116b6 100644 (file)
--- a/drivers/platform/x86/intel/int3472/clk_and_regulator.c
+++ b/drivers/platform/x86/intel/int3472/clk_and_regulator.c
@@ -185,42 +185,37 @@ void skl_int3472_unregister_clock(struct int3472_discrete_device *int3472)
        clk_unregister(int3472->clock.clk);
 }
 
-/*
- * The INT3472 device is going to be the only supplier of a regulator for
- * the sensor device. But unlike the clk framework the regulator framework
- * does not allow matching by consumer-device-name only.
- *
- * Ideally all sensor drivers would use "avdd" as supply-id. But for drivers
- * where this cannot be changed because another supply-id is already used in
- * e.g. DeviceTree files an alias for the other supply-id can be added here.
- *
- * Do not forget to update GPIO_REGULATOR_SUPPLY_MAP_COUNT when changing this.
- */
-static const char * const skl_int3472_regulator_map_supplies[] = {
-       "avdd",
-       "AVDD",
-};
-
-static_assert(ARRAY_SIZE(skl_int3472_regulator_map_supplies) ==
-             GPIO_REGULATOR_SUPPLY_MAP_COUNT);
-
 int skl_int3472_register_regulator(struct int3472_discrete_device *int3472,
                                   struct gpio_desc *gpio,
+                                  const char *supply_name,
                                   const char *second_sensor)
 {
        struct regulator_init_data init_data = { };
+       struct int3472_gpio_regulator *regulator;
        struct regulator_config cfg = { };
        int i, j;
 
-       for (i = 0, j = 0; i < ARRAY_SIZE(skl_int3472_regulator_map_supplies); i++) {
-               int3472->regulator.supply_map[j].supply = skl_int3472_regulator_map_supplies[i];
-               int3472->regulator.supply_map[j].dev_name = int3472->sensor_name;
+       if (strlen(supply_name) >= GPIO_SUPPLY_NAME_LENGTH) {
+               dev_err(int3472->dev, "supply-name '%s' length too long\n", supply_name);
+               return -E2BIG;
+       }
+
+       regulator = &int3472->regulator;
+       string_upper(regulator->supply_name_upper, supply_name);
+
+       /* The below code assume that map-count is 2 (upper- and lower-case) */
+       static_assert(GPIO_REGULATOR_SUPPLY_MAP_COUNT == 2);
+
+       for (i = 0, j = 0; i < GPIO_REGULATOR_SUPPLY_MAP_COUNT; i++) {
+               const char *supply = i ? regulator->supply_name_upper : supply_name;
+
+               regulator->supply_map[j].supply = supply;
+               regulator->supply_map[j].dev_name = int3472->sensor_name;
                j++;
 
                if (second_sensor) {
-                       int3472->regulator.supply_map[j].supply =
-                               skl_int3472_regulator_map_supplies[i];
-                       int3472->regulator.supply_map[j].dev_name = second_sensor;
+                       regulator->supply_map[j].supply = supply;
+                       regulator->supply_map[j].dev_name = second_sensor;
                        j++;
                }
        }
@@ -229,9 +224,8 @@ int skl_int3472_register_regulator(struct int3472_discrete_device *int3472,
        init_data.consumer_supplies = int3472->regulator.supply_map;
        init_data.num_consumer_supplies = j;
 
-       snprintf(int3472->regulator.regulator_name,
-                sizeof(int3472->regulator.regulator_name), "%s-regulator",
-                acpi_dev_name(int3472->adev));
+       snprintf(regulator->regulator_name, sizeof(regulator->regulator_name), "%s-%s",
+                acpi_dev_name(int3472->adev), supply_name);
 
        int3472->regulator.rdesc = INT3472_REGULATOR(
                                                int3472->regulator.regulator_name,

diff --git a/drivers/platform/x86/intel/int3472/common.h b/drivers/platform/x86/intel/int3472/common.h
index 3728f38..4bfd60d 100644 (file)
--- a/drivers/platform/x86/intel/int3472/common.h
+++ b/drivers/platform/x86/intel/int3472/common.h
@@ -26,7 +26,11 @@
 #define INT3472_PDEV_MAX_NAME_LEN                              23
 #define INT3472_MAX_SENSOR_GPIOS                               3
 
-#define GPIO_REGULATOR_NAME_LENGTH                             21
+/* E.g. "avdd\0" */
+#define GPIO_SUPPLY_NAME_LENGTH                                5
+/* 12 chars for acpi_dev_name() + "-", e.g. "ABCD1234:00-" */
+#define GPIO_REGULATOR_NAME_LENGTH                             (12 + GPIO_SUPPLY_NAME_LENGTH)
+/* lower- and upper-case mapping */
 #define GPIO_REGULATOR_SUPPLY_MAP_COUNT                                2
 
 #define INT3472_LED_MAX_NAME_LEN                               32
@@ -85,6 +89,7 @@ struct int3472_discrete_device {
        struct int3472_gpio_regulator {
                /* SUPPLY_MAP_COUNT * 2 to make room for second sensor mappings */
                struct regulator_consumer_supply supply_map[GPIO_REGULATOR_SUPPLY_MAP_COUNT * 2];
+               char supply_name_upper[GPIO_SUPPLY_NAME_LENGTH];
                char regulator_name[GPIO_REGULATOR_NAME_LENGTH];
                struct regulator_dev *rdev;
                struct regulator_desc rdesc;
@@ -129,6 +134,7 @@ void skl_int3472_unregister_clock(struct int3472_discrete_device *int3472);
 
 int skl_int3472_register_regulator(struct int3472_discrete_device *int3472,
                                   struct gpio_desc *gpio,
+                                  const char *supply_name,
                                   const char *second_sensor);
 void skl_int3472_unregister_regulator(struct int3472_discrete_device *int3472);
 

diff --git a/drivers/platform/x86/intel/int3472/discrete.c b/drivers/platform/x86/intel/int3472/discrete.c
index cbf3945..f6dae82 100644 (file)
--- a/drivers/platform/x86/intel/int3472/discrete.c
+++ b/drivers/platform/x86/intel/int3472/discrete.c
@@ -188,7 +188,7 @@ static void int3472_get_con_id_and_polarity(struct acpi_device *adev, u8 *type,
                *gpio_flags = GPIO_ACTIVE_HIGH;
                break;
        case INT3472_GPIO_TYPE_POWER_ENABLE:
-               *con_id = "power-enable";
+               *con_id = "avdd";
                *gpio_flags = GPIO_ACTIVE_HIGH;
                break;
        default:
@@ -311,7 +311,7 @@ static int skl_int3472_handle_gpio_resources(struct acpi_resource *ares,
 
                        break;
                case INT3472_GPIO_TYPE_POWER_ENABLE:
-                       ret = skl_int3472_register_regulator(int3472, gpio,
+                       ret = skl_int3472_register_regulator(int3472, gpio, con_id,
                                                             int3472->quirks.avdd_second_sensor);
                        if (ret)
                                err_msg = "Failed to map regulator to sensor\n";