[RFCv1 2/8] mfd: rk808: use syscore for RK805 PMIC shutdown

[Anand Moon <linux.amoon@xxxxxxxxx>]

Use common syscore_shutdown for RK805 PMIC to do
clean I2C shutdown, drop the unused pm_pwroff_prep_fn
and pm_pwroff_fn function pointers.

Cc: Heiko Stuebner <heiko@xxxxxxxxx>
Signed-off-by: Anand Moon <linux.amoon@xxxxxxxxx>
---
 drivers/mfd/rk808.c | 33 +++++++++++++++++----------------
 1 file changed, 17 insertions(+), 16 deletions(-)

diff --git a/drivers/mfd/rk808.c b/drivers/mfd/rk808.c
index e637f5bcc8bb..713d989064ba 100644
--- a/drivers/mfd/rk808.c
+++ b/drivers/mfd/rk808.c
@@ -467,16 +467,6 @@ static void rk808_update_bits(unsigned int reg, unsigned int mask,
 			"can't write to register 0x%x: %x!\n", reg, ret);
 }
 
-static void rk805_device_shutdown(void)
-{
-	rk808_update_bits(RK805_DEV_CTRL_REG, DEV_OFF, DEV_OFF);
-}
-
-static void rk805_device_shutdown_prepare(void)
-{
-	rk808_update_bits(RK805_GPIO_IO_POL_REG, SLP_SD_MSK, SHUTDOWN_FUN);
-}
-
 static void rk808_device_shutdown(void)
 {
 	rk808_update_bits(RK808_DEVCTRL_REG, DEV_OFF_RST, DEV_OFF_RST);
@@ -491,10 +481,23 @@ static void rk8xx_syscore_shutdown(void)
 {
 	struct rk808 *rk808 = i2c_get_clientdata(rk808_i2c_client);
 
-	if (system_state == SYSTEM_POWER_OFF &&
-	    (rk808->variant == RK809_ID || rk808->variant == RK817_ID)) {
-		rk808_update_bits(RK817_SYS_CFG(3), RK817_SLPPIN_FUNC_MSK,
-				SLPPIN_DN_FUN);
+	if (system_state == SYSTEM_POWER_OFF) {
+		dev_info(&rk808_i2c_client->dev, "System Shutdown Event\n");
+
+		switch (rk808->variant) {
+		case RK805_ID:
+			rk808_update_bits(RK805_GPIO_IO_POL_REG,
+					SLP_SD_MSK, SHUTDOWN_FUN);
+			rk808_update_bits(RK805_DEV_CTRL_REG, DEV_OFF, DEV_OFF);
+			break;
+		case RK809_ID:
+		case RK817_ID:
+			rk808_update_bits(RK817_SYS_CFG(3),
+					RK817_SLPPIN_FUNC_MSK, SLPPIN_DN_FUN);
+			break;
+		default:
+			break;
+		}
 	}
 }
 
@@ -565,8 +568,6 @@ static int rk808_probe(struct i2c_client *client,
 		nr_pre_init_regs = ARRAY_SIZE(rk805_pre_init_reg);
 		cells = rk805s;
 		nr_cells = ARRAY_SIZE(rk805s);
-		rk808->pm_pwroff_fn = rk805_device_shutdown;
-		rk808->pm_pwroff_prep_fn = rk805_device_shutdown_prepare;
 		break;
 	case RK808_ID:
 		rk808->regmap_cfg = &rk808_regmap_config;
-- 
2.24.0