linux-kernel - [PATCH] regulator: rtmv20: Fix to make regcache value first reading back from HW

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Date:   Tue,  1 Jun 2021 18:09:15 +0800
From:   cy_huang <u0084500@...il.com>
To:     lgirdwood@...il.com, broonie@...nel.org
Cc:     linux-kernel@...r.kernel.org, cy_huang@...htek.com
Subject: [PATCH] regulator: rtmv20: Fix to make regcache value first reading back from HW

From: ChiYuan Huang <cy_huang@...htek.com>

- Fix to make regcache value first reading back from HW.

Signed-off-by: ChiYuan Huang <cy_huang@...htek.com>
---
Due to init property function always write the regval, this patch didn't affect the normal
operation. Just used to make sure during the cache init, the regcache default is reading back
from the HW.

---
 drivers/regulator/rtmv20-regulator.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/regulator/rtmv20-regulator.c b/drivers/regulator/rtmv20-regulator.c
index 852fb25..b37c29c 100644
--- a/drivers/regulator/rtmv20-regulator.c
+++ b/drivers/regulator/rtmv20-regulator.c
@@ -27,6 +27,7 @@
 #define RTMV20_REG_LDIRQ	0x30
 #define RTMV20_REG_LDSTAT	0x40
 #define RTMV20_REG_LDMASK	0x50
+#define RTMV20_MAX_REGS		(RTMV20_REG_LDMASK + 1)
 
 #define RTMV20_VID_MASK		GENMASK(7, 4)
 #define RICHTEK_VID		0x80
@@ -275,6 +276,7 @@ static const struct regmap_config rtmv20_regmap_config = {
 	.val_bits = 8,
 	.cache_type = REGCACHE_RBTREE,
 	.max_register = RTMV20_REG_LDMASK,
+	.num_reg_defaults_raw = RTMV20_MAX_REGS,
 
 	.writeable_reg = rtmv20_is_accessible_reg,
 	.readable_reg = rtmv20_is_accessible_reg,
-- 
2.7.4