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Date: Wed, 24 Jul 2013 18:07:18 +0800
From: Robin Gong <b38343@...escale.com>
To: Steffen Trumtrar <s.trumtrar@...gutronix.de>
CC: <broonie@...nel.org>, <shawn.guo@...aro.org>,
<grant.likely@...aro.org>, <rob.herring@...xeda.com>,
<rob@...dley.net>, <lgirdwood@...il.com>,
<devicetree-discuss@...ts.ozlabs.org>, <linux-doc@...r.kernel.org>,
<linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v4] regulator: pfuze100: add pfuze100 regulator driver
On Wed, Jul 24, 2013 at 10:30:41AM +0200, Steffen Trumtrar wrote:
> 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@...escale.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.
>
Thanks firstly for you test with the patch. I have test it on v3.10 just now,
and can't reproduce what you saw that VDDR regulator can't be registered
successfully. I don't think fixed regulator need <set_voltage_sel>.
> > +
> > +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.
>
Thanks your finding, I have noticed it after I send the V4 patch. I modify this
to eliminate the errors which found by checkpatch, such as"ERROR: Macros with
complex values should be enclosed in parenthesis". I notice some driver use
brace here, and modify this, sorry for sending quickly without building and
testing again.... I will keep it as V3 and before version on these macro define
> > +#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
>
> --
> Pengutronix e.K. | |
> Industrial Linux Solutions | http://www.pengutronix.de/ |
> Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 |
> Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |
>
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