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* [PATCH v4 4/4] pmbus: ltc2978: add regulator support
@ 2014-10-01 20:18 atull
  0 siblings, 0 replies; 5+ messages in thread
From: atull @ 2014-10-01 20:18 UTC (permalink / raw)
  To: linux, jdelvare
  Cc: lm-sensors, lgirdwood, broonie, robh+dt, pawel.moll, mark.rutland,
	ijc+devicetree, galak, devicetree, linux-kernel, delicious.quinoa,
	dinguyen, yvanderv, Alan Tull

From: Alan Tull <atull@opensource.altera.com>

Add simple on/off regulator support for ltc2978 and
other pmbus parts supported by ltc2978.c

Signed-off-by: Alan Tull <atull@opensource.altera.com>

v2: Remove '#include <linux/regulator/machine.h>'
    Only one regulator per pmbus device
    Get regulator_init_data from pdata or device tree

v3: Support multiple regulators for each chip
    Move most code to pmbus_core.c
    fixed values for on/off

v4: fix a #endif comment
    simplify probe code, remove added switch statement
    remove BUG_ON(), add error message and fix num_regulators
---
 drivers/hwmon/pmbus/Kconfig   |    7 +++++++
 drivers/hwmon/pmbus/ltc2978.c |   37 +++++++++++++++++++++++++++++++++++++
 2 files changed, 44 insertions(+)

diff --git a/drivers/hwmon/pmbus/Kconfig b/drivers/hwmon/pmbus/Kconfig
index 6e1e493..79117b7 100644
--- a/drivers/hwmon/pmbus/Kconfig
+++ b/drivers/hwmon/pmbus/Kconfig
@@ -56,6 +56,13 @@ config SENSORS_LTC2978
 	  This driver can also be built as a module. If so, the module will
 	  be called ltc2978.
 
+config SENSORS_LTC2978_REGULATOR
+	boolean "Regulator support for LTC2974, LTC2978, LTC3880, and LTC3883"
+	depends on SENSORS_LTC2978 && REGULATOR
+	help
+	  If you say yes here you get regulator support for Linear
+	  Technology LTC2974, LTC2978, LTC3880, and LTC3883.
+
 config SENSORS_MAX16064
 	tristate "Maxim MAX16064"
 	default n
diff --git a/drivers/hwmon/pmbus/ltc2978.c b/drivers/hwmon/pmbus/ltc2978.c
index e24ed52..422712e 100644
--- a/drivers/hwmon/pmbus/ltc2978.c
+++ b/drivers/hwmon/pmbus/ltc2978.c
@@ -22,6 +22,8 @@
 #include <linux/err.h>
 #include <linux/slab.h>
 #include <linux/i2c.h>
+#include <linux/regulator/driver.h>
+#include <linux/regulator/of_regulator.h>
 #include "pmbus.h"
 
 enum chips { ltc2974, ltc2977, ltc2978, ltc3880, ltc3883, ltm4676 };
@@ -374,6 +376,30 @@ static const struct i2c_device_id ltc2978_id[] = {
 };
 MODULE_DEVICE_TABLE(i2c, ltc2978_id);
 
+#if IS_ENABLED(CONFIG_SENSORS_LTC2978_REGULATOR)
+static const struct regulator_desc ltc2978_reg_desc[] = {
+	PMBUS_REGULATOR("vout_en", 0),
+	PMBUS_REGULATOR("vout_en", 1),
+	PMBUS_REGULATOR("vout_en", 2),
+	PMBUS_REGULATOR("vout_en", 3),
+	PMBUS_REGULATOR("vout_en", 4),
+	PMBUS_REGULATOR("vout_en", 5),
+	PMBUS_REGULATOR("vout_en", 6),
+	PMBUS_REGULATOR("vout_en", 7),
+};
+
+static struct of_regulator_match ltc2978_reg_matches[] = {
+	{ .name = "vout_en0" },
+	{ .name = "vout_en1" },
+	{ .name = "vout_en2" },
+	{ .name = "vout_en3" },
+	{ .name = "vout_en4" },
+	{ .name = "vout_en5" },
+	{ .name = "vout_en6" },
+	{ .name = "vout_en7" },
+};
+#endif /* CONFIG_SENSORS_LTC2978_REGULATOR */
+
 static int ltc2978_probe(struct i2c_client *client,
 			 const struct i2c_device_id *id)
 {
@@ -487,6 +513,17 @@ static int ltc2978_probe(struct i2c_client *client,
 	default:
 		return -ENODEV;
 	}
+
+#if IS_ENABLED(CONFIG_SENSORS_LTC2978_REGULATOR)
+	info->num_regulators = info->pages;
+	info->reg_desc = ltc2978_reg_desc;
+	info->reg_matches = ltc2978_reg_matches;
+	if (info->num_regulators > ARRAY_SIZE(ltc2978_reg_desc)) {
+		dev_err(&client->dev, "num_regulators too large!");
+		info->num_regulators = ARRAY_SIZE(ltc2978_reg_desc);
+	}
+#endif
+
 	return pmbus_do_probe(client, id, info);
 }
 
-- 
1.7.9.5

^ permalink raw reply related	[flat|nested] 5+ messages in thread
* Re: [PATCH v4 4/4] pmbus: ltc2978: add regulator support
@ 2014-10-01 21:36 Guenter Roeck
       [not found] ` <20141001213613.GA29312-0h96xk9xTtrk1uMJSBkQmQ@public.gmane.org>
  2014-10-01 22:20 ` atull
  0 siblings, 2 replies; 5+ messages in thread
From: Guenter Roeck @ 2014-10-01 21:36 UTC (permalink / raw)
  To: atull-yzvPICuk2ABMcg4IHK0kFoH6Mc4MB0Vx
  Cc: jdelvare-l3A5Bk7waGM, lm-sensors-GZX6beZjE8VD60Wz+7aTrA,
	lgirdwood-Re5JQEeQqe8AvxtiuMwx3w, broonie-DgEjT+Ai2ygdnm+yROfE0A,
	robh+dt-DgEjT+Ai2ygdnm+yROfE0A, pawel.moll-5wv7dgnIgG8,
	mark.rutland-5wv7dgnIgG8, ijc+devicetree-KcIKpvwj1kUDXYZnReoRVg,
	galak-sgV2jX0FEOL9JmXXK+q4OQ, devicetree-u79uwXL29TY76Z2rM5mHXA,
	linux-kernel-u79uwXL29TY76Z2rM5mHXA,
	delicious.quinoa-Re5JQEeQqe8AvxtiuMwx3w,
	dinguyen-yzvPICuk2ABMcg4IHK0kFoH6Mc4MB0Vx,
	yvanderv-yzvPICuk2ABMcg4IHK0kFoH6Mc4MB0Vx

On Wed, Oct 01, 2014 at 03:18:20PM -0500, atull-yzvPICuk2ABMcg4IHK0kFoH6Mc4MB0Vx@public.gmane.org wrote:
> From: Alan Tull <atull-yzvPICuk2ABMcg4IHK0kFoH6Mc4MB0Vx@public.gmane.org>
> 
> Add simple on/off regulator support for ltc2978 and
> other pmbus parts supported by ltc2978.c
> 
> Signed-off-by: Alan Tull <atull-yzvPICuk2ABMcg4IHK0kFoH6Mc4MB0Vx@public.gmane.org>
> 
> v2: Remove '#include <linux/regulator/machine.h>'
>     Only one regulator per pmbus device
>     Get regulator_init_data from pdata or device tree
> 
> v3: Support multiple regulators for each chip
>     Move most code to pmbus_core.c
>     fixed values for on/off
> 
> v4: fix a #endif comment
>     simplify probe code, remove added switch statement
>     remove BUG_ON(), add error message and fix num_regulators
> ---
>  drivers/hwmon/pmbus/Kconfig   |    7 +++++++
>  drivers/hwmon/pmbus/ltc2978.c |   37 +++++++++++++++++++++++++++++++++++++
>  2 files changed, 44 insertions(+)
> 
> diff --git a/drivers/hwmon/pmbus/Kconfig b/drivers/hwmon/pmbus/Kconfig
> index 6e1e493..79117b7 100644
> --- a/drivers/hwmon/pmbus/Kconfig
> +++ b/drivers/hwmon/pmbus/Kconfig
> @@ -56,6 +56,13 @@ config SENSORS_LTC2978
>  	  This driver can also be built as a module. If so, the module will
>  	  be called ltc2978.
>  
> +config SENSORS_LTC2978_REGULATOR
> +	boolean "Regulator support for LTC2974, LTC2978, LTC3880, and LTC3883"

We will need to update this and SENSORS_LTC2978 and add LTC2977 as well as
LTM4646 to the list of supported chips.

Guenter

> +	depends on SENSORS_LTC2978 && REGULATOR
> +	help
> +	  If you say yes here you get regulator support for Linear
> +	  Technology LTC2974, LTC2978, LTC3880, and LTC3883.
> +
>  config SENSORS_MAX16064
>  	tristate "Maxim MAX16064"
>  	default n
> diff --git a/drivers/hwmon/pmbus/ltc2978.c b/drivers/hwmon/pmbus/ltc2978.c
> index e24ed52..422712e 100644
> --- a/drivers/hwmon/pmbus/ltc2978.c
> +++ b/drivers/hwmon/pmbus/ltc2978.c
> @@ -22,6 +22,8 @@
>  #include <linux/err.h>
>  #include <linux/slab.h>
>  #include <linux/i2c.h>
> +#include <linux/regulator/driver.h>
> +#include <linux/regulator/of_regulator.h>
>  #include "pmbus.h"
>  
>  enum chips { ltc2974, ltc2977, ltc2978, ltc3880, ltc3883, ltm4676 };
> @@ -374,6 +376,30 @@ static const struct i2c_device_id ltc2978_id[] = {
>  };
>  MODULE_DEVICE_TABLE(i2c, ltc2978_id);
>  
> +#if IS_ENABLED(CONFIG_SENSORS_LTC2978_REGULATOR)
> +static const struct regulator_desc ltc2978_reg_desc[] = {
> +	PMBUS_REGULATOR("vout_en", 0),
> +	PMBUS_REGULATOR("vout_en", 1),
> +	PMBUS_REGULATOR("vout_en", 2),
> +	PMBUS_REGULATOR("vout_en", 3),
> +	PMBUS_REGULATOR("vout_en", 4),
> +	PMBUS_REGULATOR("vout_en", 5),
> +	PMBUS_REGULATOR("vout_en", 6),
> +	PMBUS_REGULATOR("vout_en", 7),
> +};
> +
> +static struct of_regulator_match ltc2978_reg_matches[] = {
> +	{ .name = "vout_en0" },
> +	{ .name = "vout_en1" },
> +	{ .name = "vout_en2" },
> +	{ .name = "vout_en3" },
> +	{ .name = "vout_en4" },
> +	{ .name = "vout_en5" },
> +	{ .name = "vout_en6" },
> +	{ .name = "vout_en7" },
> +};
> +#endif /* CONFIG_SENSORS_LTC2978_REGULATOR */
> +
>  static int ltc2978_probe(struct i2c_client *client,
>  			 const struct i2c_device_id *id)
>  {
> @@ -487,6 +513,17 @@ static int ltc2978_probe(struct i2c_client *client,
>  	default:
>  		return -ENODEV;
>  	}
> +
> +#if IS_ENABLED(CONFIG_SENSORS_LTC2978_REGULATOR)
> +	info->num_regulators = info->pages;
> +	info->reg_desc = ltc2978_reg_desc;
> +	info->reg_matches = ltc2978_reg_matches;
> +	if (info->num_regulators > ARRAY_SIZE(ltc2978_reg_desc)) {
> +		dev_err(&client->dev, "num_regulators too large!");
> +		info->num_regulators = ARRAY_SIZE(ltc2978_reg_desc);
> +	}
> +#endif
> +
>  	return pmbus_do_probe(client, id, info);
>  }
>  
> -- 
> 1.7.9.5
> 
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^ permalink raw reply	[flat|nested] 5+ messages in thread
end of thread, other threads:[~2014-10-02  1:26 UTC | newest]

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2014-10-01 20:18 [PATCH v4 4/4] pmbus: ltc2978: add regulator support atull
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2014-10-01 21:36 Guenter Roeck
     [not found] ` <20141001213613.GA29312-0h96xk9xTtrk1uMJSBkQmQ@public.gmane.org>
2014-10-01 22:09   ` atull
2014-10-01 22:20 ` atull
2014-10-02  1:26   ` Guenter Roeck

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