[PATCH 1/4] regulator: spacemit-p1: Fix n_voltages for BUCK and LDO regulators

[Guodong Xu]

Higher voltage settings were unusable due to incorrect n_voltages values
causing registration failures. For example, setting aldo4 to 3.3V failed
with -EINVAL because the required selector (123) exceeded the allowed
range (n_voltages=117).

Fix by aligning n_voltages with the hardware register widths per the P1
datasheet [1]:
- BUCK: 255 (was 254), allows selectors 0-254, selector 255 is reserved
- LDO: 128 (was 117), allows selectors 0-127, selectors 0-10 are for
  suspend mode, valid operational range is 11-127

This enables the full voltage range supported by the hardware.

Fixes: 8b84d712ad84 ("regulator: spacemit: support SpacemiT P1 regulators")
Link: https://developer.spacemit.com/documentation [1]
Signed-off-by: Guodong Xu <guodong at riscstar.com>
---
 drivers/regulator/spacemit-p1.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/regulator/spacemit-p1.c b/drivers/regulator/spacemit-p1.c
index 2bf9137e12b1d0bc7a857213d77f05387536fe17..2b585ba01a93d0ce163c33e14c8022a506bdce11 100644
--- a/drivers/regulator/spacemit-p1.c
+++ b/drivers/regulator/spacemit-p1.c
@@ -87,13 +87,13 @@ static const struct linear_range p1_ldo_ranges[] = {
 	}
 
 #define P1_BUCK_DESC(_n) \
-	P1_REG_DESC(BUCK, buck, _n, "vin", 0x47, BUCK_MASK, 254, p1_buck_ranges)
+	P1_REG_DESC(BUCK, buck, _n, "vin", 0x47, BUCK_MASK, 255, p1_buck_ranges)
 
 #define P1_ALDO_DESC(_n) \
-	P1_REG_DESC(ALDO, aldo, _n, "vin", 0x5b, LDO_MASK, 117, p1_ldo_ranges)
+	P1_REG_DESC(ALDO, aldo, _n, "vin", 0x5b, LDO_MASK, 128, p1_ldo_ranges)
 
 #define P1_DLDO_DESC(_n) \
-	P1_REG_DESC(DLDO, dldo, _n, "buck5", 0x67, LDO_MASK, 117, p1_ldo_ranges)
+	P1_REG_DESC(DLDO, dldo, _n, "buck5", 0x67, LDO_MASK, 128, p1_ldo_ranges)
 
 static const struct regulator_desc p1_regulator_desc[] = {
 	P1_BUCK_DESC(1),

-- 
2.43.0