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author | Adrien Grassein <adrien.grassein@gmail.com> | 2021-01-14 18:47:14 +0100 |
---|---|---|
committer | Mark Brown <broonie@kernel.org> | 2021-01-15 14:16:15 +0000 |
commit | 475a5d85ff62f7ca73f51f23977e7e3ec8c9f906 (patch) | |
tree | 678452b31da47e204974d71a466ce3655a89adab /drivers/regulator/pf8x00-regulator.c | |
parent | 35a93349932e0e04c284f8a4954f3d1236c97d85 (diff) | |
download | linux-475a5d85ff62f7ca73f51f23977e7e3ec8c9f906.tar.bz2 |
regulator: pf8x00: fix nxp,phase-shift
Fix the ternary condition which is a bad coding style
in the kernel
I also remove the defering configuration of the nxp,phase-shift.
The configuration is now done at parsing time. It save some memory
and it's better for comprehension.
I also use the OTP default configuration when the parameter is wrong
or not specified.
I think that it's better to use the default configuration from the chip
than an arbitrary value.
Signed-off-by: Adrien Grassein <adrien.grassein@gmail.com>
Link: https://lore.kernel.org/r/20210114174714.122561-7-adrien.grassein@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/regulator/pf8x00-regulator.c')
-rw-r--r-- | drivers/regulator/pf8x00-regulator.c | 71 |
1 files changed, 38 insertions, 33 deletions
diff --git a/drivers/regulator/pf8x00-regulator.c b/drivers/regulator/pf8x00-regulator.c index 866162fddd07..1e5582d73405 100644 --- a/drivers/regulator/pf8x00-regulator.c +++ b/drivers/regulator/pf8x00-regulator.c @@ -114,7 +114,6 @@ enum swxilim_bits { #define PF8X00_SWXILIM_SHIFT 3 #define PF8X00_SWXILIM_MASK GENMASK(4, 3) #define PF8X00_SWXPHASE_MASK GENMASK(2, 0) -#define PF8X00_SWXPHASE_DEFAULT 0 #define PF8X00_SWXPHASE_SHIFT 7 enum pf8x00_devid { @@ -128,7 +127,6 @@ enum pf8x00_devid { struct pf8x00_regulator { struct regulator_desc desc; - u8 phase_shift; }; struct pf8x00_chip { @@ -174,11 +172,6 @@ static const int pf8x00_vsnvs_voltages[] = { 0, 1800000, 3000000, 3300000, }; -static struct pf8x00_regulator *desc_to_regulator(const struct regulator_desc *desc) -{ - return container_of(desc, struct pf8x00_regulator, desc); -} - static void swxilim_select(struct pf8x00_chip *chip, int id, int ilim) { u8 ilim_sel; @@ -230,35 +223,55 @@ static void handle_ilim_property(struct device_node *np, dev_warn(chip->dev, "nxp,ilim-ma used with incorrect regulator (%d)\n", desc->id); } -static int pf8x00_of_parse_cb(struct device_node *np, +static void handle_shift_property(struct device_node *np, const struct regulator_desc *desc, struct regulator_config *config) { - struct pf8x00_regulator *data = desc_to_regulator(desc); + unsigned char id = desc->id - PF8X00_LDO4; + unsigned char reg = PF8X00_SW_BASE(id) + SW_CONFIG2; struct pf8x00_chip *chip = config->driver_data; + int phase; int val; int ret; + if ((desc->id >= PF8X00_BUCK1) && (desc->id <= PF8X00_BUCK7)) { + ret = of_property_read_u32(np, "nxp,phase-shift", &val); + if (ret) { + dev_dbg(chip->dev, + "unspecified phase-shift for BUCK%d, using OTP configuration\n", + id); + return; + } - handle_ilim_property(np, desc, config); + if (val < 0 || val > 315 || val % 45 != 0) { + dev_warn(config->dev, + "invalid phase_shift %d for BUCK%d, using OTP configuration\n", + val, id); + return; + } - ret = of_property_read_u32(np, "nxp,phase-shift", &val); - if (ret) { - dev_dbg(chip->dev, - "unspecified phase-shift for BUCK%d, use 0 degrees\n", - desc->id - PF8X00_LDO4); - val = PF8X00_SWXPHASE_DEFAULT; - } + phase = val / 45; - phase = val / 45; - if ((phase * 45) != val) { - dev_warn(config->dev, - "invalid phase_shift %d for BUCK%d, use 0 degrees\n", - (phase * 45), desc->id - PF8X00_LDO4); - phase = PF8X00_SWXPHASE_SHIFT; - } + if (phase >= 1) + phase -= 1; + else + phase = PF8X00_SWXPHASE_SHIFT; + + regmap_update_bits(chip->regmap, reg, + PF8X00_SWXPHASE_MASK, + phase); + } else + dev_warn(chip->dev, "nxp,phase-shift used with incorrect regulator (%d)\n", id); + +} + +static int pf8x00_of_parse_cb(struct device_node *np, + const struct regulator_desc *desc, + struct regulator_config *config) +{ - data->phase_shift = (phase >= 1) ? phase - 1 : PF8X00_SWXPHASE_SHIFT; + handle_ilim_property(np, desc, config); + handle_shift_property(np, desc, config); return 0; } @@ -501,14 +514,6 @@ static int pf8x00_i2c_probe(struct i2c_client *client) "failed to register %s regulator\n", data->desc.name); return PTR_ERR(rdev); } - - if ((id >= PF8X00_BUCK1) && (id <= PF8X00_BUCK7)) { - u8 reg = PF8X00_SW_BASE(id) + SW_CONFIG2; - - regmap_update_bits(chip->regmap, reg, - PF8X00_SWXPHASE_MASK, - data->phase_shift); - } } return 0; |