mfd: max77620: Provide system power-off functionality (744b1310) · Commits · 戴 / test

drivers/mfd/max77620.c

+18 −0

Original line number	Diff line number	Diff line
		@@ -37,6 +37,8 @@
		#include <linux/regmap.h>
		#include <linux/slab.h>

		static struct max77620_chip *max77620_scratch;

		static const struct resource gpio_resources[] = {
		DEFINE_RES_IRQ(MAX77620_IRQ_TOP_GPIO),
		};
		@@ -481,6 +483,15 @@ static int max77620_read_es_version(struct max77620_chip *chip)
		return ret;
		}

		static void max77620_pm_power_off(void)
		{
		struct max77620_chip *chip = max77620_scratch;

		regmap_update_bits(chip->rmap, MAX77620_REG_ONOFFCNFG1,
		MAX77620_ONOFFCNFG1_SFT_RST,
		MAX77620_ONOFFCNFG1_SFT_RST);
		}

		static int max77620_probe(struct i2c_client *client,
		const struct i2c_device_id *id)
		{
		@@ -488,6 +499,7 @@ static int max77620_probe(struct i2c_client *client,
		struct max77620_chip *chip;
		const struct mfd_cell *mfd_cells;
		int n_mfd_cells;
		bool pm_off;
		int ret;

		chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL);
		@@ -554,6 +566,12 @@ static int max77620_probe(struct i2c_client *client,
		return ret;
		}

		pm_off = of_device_is_system_power_controller(client->dev.of_node);
		if (pm_off && !pm_power_off) {
		max77620_scratch = chip;
		pm_power_off = max77620_pm_power_off;
		}

		return 0;
		}