lkml.org 
[lkml]   [2013]   [Jul]   [29]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Subject[PATCH RFT] regulator: pfuze100: Fix n_voltages setting for SW2~SW4 with high bit set
From
Date
Current code adjust min_uV and uV_step but missed adjusting the n_voltages
setting.

When BIT6 is clear:
n_voltages = (1975000 - 400000) / 25000 + 1 = 64
When BIT6 is set:
n_voltages = (3300000 - 800000) / 50000 + 1 = 51

The n_voltages needs update because when BIT6 is set 0x73 ~ 0x7f are reserved.
When using regulator_list_voltage_linear, the n_voltages does matter here
because wrong n_voltages setting make the equation return wrong result.
e.g. if selector is 63, regulator_list_voltage_linear returns
800000 + (50000 * 63) = 4000000
It should return -EINVAL if the selector is in the range of 51 ~ 63.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
---
drivers/regulator/pfuze100-regulator.c | 16 ++++++++--------
1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/drivers/regulator/pfuze100-regulator.c b/drivers/regulator/pfuze100-regulator.c
index 2dadc31..a77379b 100644
--- a/drivers/regulator/pfuze100-regulator.c
+++ b/drivers/regulator/pfuze100-regulator.c
@@ -387,8 +387,11 @@ static int pfuze100_regulator_probe(struct i2c_client *client,

for (i = 0; i < PFUZE100_MAX_REGULATOR; i++) {
struct regulator_init_data *init_data;
+ struct regulator_desc *desc;
int val;

+ desc = &pfuze_chip->regulator_descs[i].desc;
+
if (pdata)
init_data = pdata->init_data[i];
else
@@ -396,13 +399,11 @@ static int pfuze100_regulator_probe(struct i2c_client *client,

/* SW2~SW4 high bit check and modify the voltage value table */
if (i > PFUZE100_SW1C && i < PFUZE100_SWBST) {
- regmap_read(pfuze_chip->regmap, PFUZE100_SW2VOL +
- (i - PFUZE100_SW2) * 7, &val);
+ regmap_read(pfuze_chip->regmap, desc->vsel_reg, &val);
if (val & 0x40) {
- pfuze_chip->regulator_descs[i].desc.min_uV
- = 800000;
- pfuze_chip->regulator_descs[i].desc.uV_step
- = 50000;
+ desc->min_uV = 800000;
+ desc->uV_step = 50000;
+ desc->n_voltages = 51;
}
}

@@ -411,8 +412,7 @@ static int pfuze100_regulator_probe(struct i2c_client *client,
config.driver_data = pfuze_chip;
config.of_node = match_of_node(i);

- pfuze_chip->regulators[i] = regulator_register(&pfuze_chip
- ->regulator_descs[i].desc, &config);
+ pfuze_chip->regulators[i] = regulator_register(desc, &config);
if (IS_ERR(pfuze_chip->regulators[i])) {
dev_err(&client->dev, "register regulator%s failed\n",
pfuze100_regulators[i].desc.name);
--
1.8.1.2




\
 
 \ /
  Last update: 2013-07-30 05:01    [W:0.084 / U:4.784 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site