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[PATCH 1/6] regulator: pbias: program pbias register offset in pbias driver

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  [PATCH 1/6] regulator: pbias: program pbias register offset in pbias driver Kishon Vijay Abraham I <kishon@ti.com> - 2015-09-02 12:50 +0200
    Re: [PATCH 1/6] regulator: pbias: program pbias register offset in  pbias driver Tony Lindgren <tony@atomide.com> - 2015-09-02 17:40 +0200
    Re: [PATCH 1/6] regulator: pbias: program pbias register offset in  pbias driver Mark Brown <broonie@kernel.org> - 2015-09-02 20:10 +0200

#1217511 — [PATCH 1/6] regulator: pbias: program pbias register offset in pbias driver

Add separate compatible strings for every platform and populate the
pbias register offset in the driver data.
This helps avoid depending on the dt for pbias register offset.

Also update the dt binding documentation with the new compatible
strings.

Suggested-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
---
 .../bindings/regulator/pbias-regulator.txt         |    7 ++-
 drivers/regulator/pbias-regulator.c                |   52 +++++++++++++++++---
 2 files changed, 52 insertions(+), 7 deletions(-)

diff --git a/Documentation/devicetree/bindings/regulator/pbias-regulator.txt b/Documentation/devicetree/bindings/regulator/pbias-regulator.txt
index 32aa26f..acbcb45 100644
--- a/Documentation/devicetree/bindings/regulator/pbias-regulator.txt
+++ b/Documentation/devicetree/bindings/regulator/pbias-regulator.txt
@@ -2,7 +2,12 @@ PBIAS internal regulator for SD card dual voltage i/o pads on OMAP SoCs.
 
 Required properties:
 - compatible:
-  - "ti,pbias-omap" for OMAP2, OMAP3, OMAP4, OMAP5, DRA7.
+  - should be "ti,pbias-dra7" for DRA7
+  - should be "ti,pbias-omap2" for OMAP2
+  - should be "ti,pbias-omap3" for OMAP3
+  - should be "ti,pbias-omap4" for OMAP4
+  - should be "ti,pbias-omap5" for OMAP5
+  - "ti,pbias-omap" is deprecated
 - reg: pbias register offset from syscon base and size of pbias register.
 - syscon : phandle of the system control module
 - regulator-name : should be
diff --git a/drivers/regulator/pbias-regulator.c b/drivers/regulator/pbias-regulator.c
index bd2b75c..afe5056 100644
--- a/drivers/regulator/pbias-regulator.c
+++ b/drivers/regulator/pbias-regulator.c
@@ -44,6 +44,10 @@ struct pbias_regulator_data {
 	int voltage;
 };
 
+struct pbias_of_data {
+	unsigned int offset;
+};
+
 static const unsigned int pbias_volt_table[] = {
 	1800000,
 	3000000
@@ -98,8 +102,33 @@ static struct of_regulator_match pbias_matches[] = {
 };
 #define PBIAS_NUM_REGS	ARRAY_SIZE(pbias_matches)
 
+static const struct pbias_of_data pbias_of_data_omap2 = {
+	.offset = 0x230,
+};
+
+static const struct pbias_of_data pbias_of_data_omap3 = {
+	.offset = 0x2b0,
+};
+
+static const struct pbias_of_data pbias_of_data_omap4 = {
+	.offset = 0x60,
+};
+
+static const struct pbias_of_data pbias_of_data_omap5 = {
+	.offset = 0x60,
+};
+
+static const struct pbias_of_data pbias_of_data_dra7 = {
+	.offset = 0xe00,
+};
+
 static const struct of_device_id pbias_of_match[] = {
 	{ .compatible = "ti,pbias-omap", },
+	{ .compatible = "ti,pbias-omap2", .data = &pbias_of_data_omap2, },
+	{ .compatible = "ti,pbias-omap3", .data = &pbias_of_data_omap3, },
+	{ .compatible = "ti,pbias-omap4", .data = &pbias_of_data_omap4, },
+	{ .compatible = "ti,pbias-omap5", .data = &pbias_of_data_omap5, },
+	{ .compatible = "ti,pbias-dra7", .data = &pbias_of_data_dra7, },
 	{},
 };
 MODULE_DEVICE_TABLE(of, pbias_of_match);
@@ -114,6 +143,9 @@ static int pbias_regulator_probe(struct platform_device *pdev)
 	const struct pbias_reg_info *info;
 	int ret = 0;
 	int count, idx, data_idx = 0;
+	const struct of_device_id *match;
+	const struct pbias_of_data *data;
+	unsigned int offset;
 
 	count = of_regulator_match(&pdev->dev, np, pbias_matches,
 						PBIAS_NUM_REGS);
@@ -129,6 +161,18 @@ static int pbias_regulator_probe(struct platform_device *pdev)
 	if (IS_ERR(syscon))
 		return PTR_ERR(syscon);
 
+	match = of_match_device(of_match_ptr(pbias_of_match), &pdev->dev);
+	if (match && match->data) {
+		data = match->data;
+		offset = data->offset;
+	} else {
+		res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+		if (!res)
+			return -EINVAL;
+
+		offset = res->start;
+	}
+
 	cfg.regmap = syscon;
 	cfg.dev = &pdev->dev;
 
@@ -141,10 +185,6 @@ static int pbias_regulator_probe(struct platform_device *pdev)
 		if (!info)
 			return -ENODEV;
 
-		res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-		if (!res)
-			return -EINVAL;
-
 		drvdata[data_idx].syscon = syscon;
 		drvdata[data_idx].info = info;
 		drvdata[data_idx].desc.name = info->name;
@@ -154,9 +194,9 @@ static int pbias_regulator_probe(struct platform_device *pdev)
 		drvdata[data_idx].desc.volt_table = pbias_volt_table;
 		drvdata[data_idx].desc.n_voltages = 2;
 		drvdata[data_idx].desc.enable_time = info->enable_time;
-		drvdata[data_idx].desc.vsel_reg = res->start;
+		drvdata[data_idx].desc.vsel_reg = offset;
 		drvdata[data_idx].desc.vsel_mask = info->vmode;
-		drvdata[data_idx].desc.enable_reg = res->start;
+		drvdata[data_idx].desc.enable_reg = offset;
 		drvdata[data_idx].desc.enable_mask = info->enable_mask;
 		drvdata[data_idx].desc.enable_val = info->enable;
 
-- 
1.7.9.5

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#1217707 — Re: [PATCH 1/6] regulator: pbias: program pbias register offset in pbias driver

* Kishon Vijay Abraham I <kishon@ti.com> [150902 03:51]:
> --- a/drivers/regulator/pbias-regulator.c
> +++ b/drivers/regulator/pbias-regulator.c

How about add a comment here:

/* Offset from SCM general area (and syscon) base */
  
> +static const struct pbias_of_data pbias_of_data_omap2 = {
> +	.offset = 0x230,
> +};
> +
> +static const struct pbias_of_data pbias_of_data_omap3 = {
> +	.offset = 0x2b0,
> +};
> +
> +static const struct pbias_of_data pbias_of_data_omap4 = {
> +	.offset = 0x60,
> +};
> +
> +static const struct pbias_of_data pbias_of_data_omap5 = {
> +	.offset = 0x60,
> +};
> +
> +static const struct pbias_of_data pbias_of_data_dra7 = {
> +	.offset = 0xe00,
> +};
> +
>  static const struct of_device_id pbias_of_match[] = {
>  	{ .compatible = "ti,pbias-omap", },
> +	{ .compatible = "ti,pbias-omap2", .data = &pbias_of_data_omap2, },
> +	{ .compatible = "ti,pbias-omap3", .data = &pbias_of_data_omap3, },
> +	{ .compatible = "ti,pbias-omap4", .data = &pbias_of_data_omap4, },
> +	{ .compatible = "ti,pbias-omap5", .data = &pbias_of_data_omap5, },
> +	{ .compatible = "ti,pbias-dra7", .data = &pbias_of_data_dra7, },
>  	{},
>  };
...

> @@ -129,6 +161,18 @@ static int pbias_regulator_probe(struct platform_device *pdev)
>  	if (IS_ERR(syscon))
>  		return PTR_ERR(syscon);
>  
> +	match = of_match_device(of_match_ptr(pbias_of_match), &pdev->dev);
> +	if (match && match->data) {
> +		data = match->data;
> +		offset = data->offset;
> +	} else {
> +		res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> +		if (!res)
> +			return -EINVAL;
> +
> +		offset = res->start;
> +	}
> +
>  	cfg.regmap = syscon;
>  	cfg.dev = &pdev->dev;
>  

Maybe add a warning here for parsing the legacy broken IORESOURCE_MEM
that's known to be broken from DT point of view?

Other than that, looks OK to me and should allow also changing to
use a generic solution, Mark may have some other comments.

Anyways, something like this is needed for v4.3-rc cycle, probably
best that Mark queues all these after review. So feel free to add
for the whole series:

Acked-by: Tony Lindgren <tony@atomide.com>
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#1217787 — Re: [PATCH 1/6] regulator: pbias: program pbias register offset in pbias driver

[Multipart message — attachments visible in raw view] — view raw

On Wed, Sep 02, 2015 at 04:17:28PM +0530, Kishon Vijay Abraham I wrote:
> Add separate compatible strings for every platform and populate the
> pbias register offset in the driver data.
> This helps avoid depending on the dt for pbias register offset.

Can you respin with Tony's comment please and I'll apply?

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