diff options
| author | Tom Cherry <tcherry@nvidia.com> | 2010-12-28 18:30:31 -0800 |
|---|---|---|
| committer | Bharat Nihalani <bnihalani@nvidia.com> | 2011-01-05 22:05:59 -0800 |
| commit | 37e6f8f499816537eecbaf9cc305ac0add835062 (patch) | |
| tree | e75c254758c745d3011f43e7feb68b703717f5da /drivers/regulator | |
| parent | 4812e391e1e0fdae30b4140e77471ccf4ef6860c (diff) | |
max8907c regulator: fix unit error
The minimum, maximum, and step voltages for SD1 are different on max8907b
and max8907c. This change reads the version register of the device
and uses the proper values, defaulting to the max8907c values, unless
the device is a max8907b.
Bug 772688
Change-Id: I2bc53e81c7784e47c50e4ff45c4f4d71d875e187
Reviewed-on: http://git-master/r/14503
Tested-by: Thomas Cherry <tcherry@nvidia.com>
Reviewed-by: Sachin Nikam <snikam@nvidia.com>
Reviewed-by: Bharat Nihalani <bnihalani@nvidia.com>
Diffstat (limited to 'drivers/regulator')
| -rw-r--r-- | drivers/regulator/max8907c-regulator.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/regulator/max8907c-regulator.c b/drivers/regulator/max8907c-regulator.c index fc3087670164..9471b75d854f 100644 --- a/drivers/regulator/max8907c-regulator.c +++ b/drivers/regulator/max8907c-regulator.c @@ -17,6 +17,11 @@ #include <linux/mfd/max8907c.h> #include <linux/regulator/max8907c-regulator.h> +#define MAX8907C_II2RR_VERSION_MASK 0xF0 +#define MAX8907C_II2RR_VERSION_REV_A 0x00 +#define MAX8907C_II2RR_VERSION_REV_B 0x10 +#define MAX8907C_II2RR_VERSION_REV_C 0x30 + #define MAX8907C_REGULATOR_CNT (ARRAY_SIZE(max8907c_regulators)) struct max8907c_regulator_info { @@ -362,6 +367,15 @@ static int max8907c_regulator_probe(struct platform_device *pdev) { struct max8907c_regulator_info *info; struct regulator_dev *rdev; + u8 version; + + /* Backwards compatibility with max8907b, SD1 uses different voltages */ + version = max8907c_reg_read(pdev->dev.parent, MAX8907C_REG_II2RR); + if ((version & MAX8907C_II2RR_VERSION_MASK) == MAX8907C_II2RR_VERSION_REV_B) { + max8907c_regulators[MAX8907C_SD1].min_uV = 637500; + max8907c_regulators[MAX8907C_SD1].max_uV = 1425000; + max8907c_regulators[MAX8907C_SD1].step_uV = 12500; + } info = &max8907c_regulators[pdev->id]; |