diff options
Diffstat (limited to 'target/linux/imx6/patches-3.10/0027-regulator-pfuze100-Simplify-pfuze100_set_ramp_delay-.patch')
| -rw-r--r-- | target/linux/imx6/patches-3.10/0027-regulator-pfuze100-Simplify-pfuze100_set_ramp_delay-.patch | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/target/linux/imx6/patches-3.10/0027-regulator-pfuze100-Simplify-pfuze100_set_ramp_delay-.patch b/target/linux/imx6/patches-3.10/0027-regulator-pfuze100-Simplify-pfuze100_set_ramp_delay-.patch new file mode 100644 index 0000000000..1089dffba2 --- /dev/null +++ b/target/linux/imx6/patches-3.10/0027-regulator-pfuze100-Simplify-pfuze100_set_ramp_delay-.patch @@ -0,0 +1,56 @@ +From: Axel Lin <axel.lin@ingics.com> +Subject: [PATCH] regulator: pfuze100: Simplify pfuze100_set_ramp_delay + implementation + +Simplify the equation to calculate ramp_delay. +Below equations are equivalent: + ramp_delay = 25000 / (2 * ramp_delay); + ramp_delay = 50000 / (4 * ramp_delay); + ramp_delay = 25000 / (2 * ramp_delay); + ramp_delay = 12500 / ramp_delay; +So we don't need to read BIT6 of rdev->desc->vsel_reg for applying different +equations. + +Also use rdev->desc->vsel_reg instead of run-time calculate register address. + +Signed-off-by: Axel Lin <axel.lin@ingics.com> +Reviewed-by: Robin Gong <b38343@freescale.com> +Signed-off-by: Mark Brown <broonie@linaro.org> +--- + drivers/regulator/pfuze100-regulator.c | 21 +++++---------------- + 1 file changed, 5 insertions(+), 16 deletions(-) + +--- a/drivers/regulator/pfuze100-regulator.c ++++ b/drivers/regulator/pfuze100-regulator.c +@@ -93,26 +93,15 @@ static int pfuze100_set_ramp_delay(struc + { + struct pfuze_chip *pfuze100 = rdev_get_drvdata(rdev); + int id = rdev->desc->id; +- unsigned int val, ramp_bits, reg; ++ unsigned int ramp_bits; + int ret; + + if (id < PFUZE100_SWBST) { +- if (id == PFUZE100_SW1AB) +- reg = PFUZE100_SW1ABVOL; +- else +- reg = PFUZE100_SW1CVOL + (id - PFUZE100_SW1C) * 7; +- regmap_read(pfuze100->regmap, reg, &val); +- +- if (id <= PFUZE100_SW1C) +- ramp_delay = 25000 / (2 * ramp_delay); +- else if (val & 0x40) +- ramp_delay = 50000 / (4 * ramp_delay); +- else +- ramp_delay = 25000 / (2 * ramp_delay); +- ++ ramp_delay = 12500 / ramp_delay; + ramp_bits = (ramp_delay >> 1) - (ramp_delay >> 3); +- ret = regmap_update_bits(pfuze100->regmap, reg + 4 , 0xc0, +- ramp_bits << 6); ++ ret = regmap_update_bits(pfuze100->regmap, ++ rdev->desc->vsel_reg + 4, ++ 0xc0, ramp_bits << 6); + if (ret < 0) + dev_err(pfuze100->dev, "ramp failed, err %d\n", ret); + } else |