Re: [PATCH v4] regulator: pfuze100: add pfuze100 regulator driver

Steffen Trumtrar
2013-07-24T08:30:54Z

Hi!

I tested your patch and had to change two things to actually make it
work. See below...

On Sun, Jul 21, 2013 at 05:17:27PM +0800, Robin Gong wrote:
> Add pfuze100 regulator driver.
>
> Signed-off-by: Robin Gong <b38343@freescale.com>

(...)

> ---

> diff --git a/drivers/regulator/pfuze100-regulator.c b/drivers/regulator/pfuze100-regulator.c
> new file mode 100644
> index 0000000..fd259ef
> --- /dev/null
> +++ b/drivers/regulator/pfuze100-regulator.c
> @@ -0,0 +1,462 @@

(...)

> +static struct regulator_ops pfuze100_ldo_regulator_ops = {
> + .enable = regulator_enable_regmap,
> + .disable = regulator_disable_regmap,
> + .is_enabled = regulator_is_enabled_regmap,
> + .list_voltage = regulator_list_voltage_linear,
> + .set_voltage_sel = regulator_set_voltage_sel_regmap,
> + .get_voltage_sel = regulator_get_voltage_sel_regmap,
> +};
> +
> +static struct regulator_ops pfuze100_fixed_regulator_ops = {
> + .list_voltage = regulator_list_voltage_linear,
> +};

This needs:

diff --git a/drivers/regulator/pfuze100-regulator.c b/drivers/regulator/pfuze100-regulator.c
index 07d5a54..d0d67b4 100644
--- a/drivers/regulator/pfuze100-regulator.c
+++ b/drivers/regulator/pfuze100-regulator.c
@@ -133,6 +133,7 @@ static struct regulator_ops pfuze100_ldo_regulator_ops = {

static struct regulator_ops pfuze100_fixed_regulator_ops = {
.list_voltage = regulator_list_voltage_linear,
+ .set_voltage_sel = regulator_set_voltage_sel_regmap,
};

static struct regulator_ops pfuze100_sw_regulator_ops = {

Otherwise the fixed_regulator VDDR isn't registered and the driver then unloads
completely. This is at least the case for v3.10. I haven't had the chance to test
it on v3.11-rcX. If the _regulator_do_set_voltage logic changes, then scratch this.

> +
> +static struct regulator_ops pfuze100_sw_regulator_ops = {
> + .list_voltage = regulator_list_voltage_linear,
> + .set_voltage_sel = regulator_set_voltage_sel_regmap,
> + .get_voltage_sel = regulator_get_voltage_sel_regmap,
> + .set_voltage_time_sel = regulator_set_voltage_time_sel,
> + .set_ramp_delay = pfuze100_set_ramp_delay,
> +};
> +
> +static struct regulator_ops pfuze100_swb_regulator_ops = {
> + .list_voltage = regulator_list_voltage_table,
> + .set_voltage_sel = regulator_set_voltage_sel_regmap,
> + .get_voltage_sel = regulator_get_voltage_sel_regmap,
> +
> +};
> +
> +#define PFUZE100_FIXED_REG(_name, base, voltage) \
> +{ \
> + [PFUZE100_ ## _name] = { \
> + .desc = { \
> + .name = #_name, \
> + .n_voltages = 1, \
> + .ops = &pfuze100_fixed_regulator_ops, \
> + .type = REGULATOR_VOLTAGE, \
> + .id = PFUZE100_ ## _name, \
> + .owner = THIS_MODULE, \
> + .min_uV = (voltage), \
> + .enable_reg = (base), \
> + .enable_mask = 0x10, \
> + }, \
> + } \
> +}
> +

With this and the following defines I had to remove the first and last
curly braces. It didn't compile with them. I'm not that into the preprocessor,
to fully understand if it is valid C syntax or not.
Other drivers (e.g. mc13xxx) seem to also ommit these.

> +#define PFUZE100_SW_REG(_name, base, min, max, step) \
> +{ \
> + [PFUZE100_ ## _name] = { \
> + .desc = { \
> + .name = #_name,\
> + .n_voltages = ((max) - (min)) / (step) + 1, \
> + .ops = &pfuze100_sw_regulator_ops, \
> + .type = REGULATOR_VOLTAGE, \
> + .id = PFUZE100_ ## _name, \
> + .owner = THIS_MODULE, \
> + .min_uV = (min), \
> + .uV_step = (step), \
> + .vsel_reg = (base) + PFUZE100_VOL_OFFSET, \
> + .vsel_mask = 0x3f, \
> + }, \
> + .stby_reg = (base) + PFUZE100_STANDBY_OFFSET, \
> + .stby_mask = 0x3f, \
> + } \
> +}
> +
> +#define PFUZE100_SWB_REG(_name, base, mask, voltages) \
> +{ \
> + [PFUZE100_ ## _name] = { \
> + .desc = { \
> + .name = #_name, \
> + .n_voltages = ARRAY_SIZE(voltages), \
> + .ops = &pfuze100_swb_regulator_ops, \
> + .type = REGULATOR_VOLTAGE, \
> + .id = PFUZE100_ ## _name, \
> + .owner = THIS_MODULE, \
> + .volt_table = voltages, \
> + .vsel_reg = (base), \
> + .vsel_mask = (mask), \
> + }, \
> + } \
> +}
> +
> +#define PFUZE100_VGEN_REG(_name, base, min, max, step) \
> +{ \
> + [PFUZE100_ ## _name] = { \
> + .desc = { \
> + .name = #_name, \
> + .n_voltages = ((max) - (min)) / (step) + 1, \
> + .ops = &pfuze100_ldo_regulator_ops, \
> + .type = REGULATOR_VOLTAGE, \
> + .id = PFUZE100_ ## _name, \
> + .owner = THIS_MODULE, \
> + .min_uV = (min), \
> + .uV_step = (step), \
> + .vsel_reg = (base), \
> + .vsel_mask = 0xf, \
> + .enable_reg = (base), \
> + .enable_mask = 0x10, \
> + }, \
> + .stby_reg = (base), \
> + .stby_mask = 0x20, \
> + } \
> +}
> +

Thanks,
Steffen

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