Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.kernel > #1570322 > unrolled thread

[PATCH v6 1/5] devicetree: mfd: Add binding for the TI LM3533

Back to article view | Back to linux.kernel

Contents

  [PATCH v6 1/5] devicetree: mfd: Add binding for the TI LM3533 Bjorn Andersson <bjorn.andersson@linaro.org> - 2017-01-31 06:20 +0100
    [PATCH v6 4/5] iio: light: lm3533-als: Support initialization from Device Tree Bjorn Andersson <bjorn.andersson@linaro.org> - 2017-01-31 06:20 +0100
      Re: [PATCH v6 4/5] iio: light: lm3533-als: Support initialization  from Device Tree Peter Meerwald-Stadler <pmeerw@pmeerw.net> - 2017-01-31 08:10 +0100
    [PATCH v6 3/5] backlight: lm3533: Support initialization from Device Tree Bjorn Andersson <bjorn.andersson@linaro.org> - 2017-01-31 06:20 +0100
      Re: [PATCH v6 3/5] backlight: lm3533: Support initialization from  Device Tree Lee Jones <lee.jones@linaro.org> - 2017-02-08 14:00 +0100

#1570322 — [PATCH v6 1/5] devicetree: mfd: Add binding for the TI LM3533

From: Bjorn Andersson <bjorn.andersson@sonymobile.com>

Add the binding for the Texas Instruments LM3533 lighting power
solution.

Acked-by: Jonathan Cameron <jic23@kernel.org>
Acked-by: Rob Herring <robh@kernel.org>
Acked-for-MFD-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@sonymobile.com>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
---

Changes since v5:
- None

Changes since v4:
- Acks from Jonathan, Lee and Rob

Changes since v3:
- Added compatible to sub-nodes, per Lee's requested to treat them as separate
  pieces.

 Documentation/devicetree/bindings/mfd/lm3533.txt | 205 +++++++++++++++++++++++
 1 file changed, 205 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/mfd/lm3533.txt

diff --git a/Documentation/devicetree/bindings/mfd/lm3533.txt b/Documentation/devicetree/bindings/mfd/lm3533.txt
new file mode 100644
index 000000000000..909281096ba2
--- /dev/null
+++ b/Documentation/devicetree/bindings/mfd/lm3533.txt
@@ -0,0 +1,205 @@
+Texas Instruments LM3533 binding
+
+This binding describes the Texas Instruments LM3533, a lighting power solution
+for smartphone handsets. The common properties are described directly in the
+node, while each individual component are described in an optional subnode.
+
+- compatible:
+	Usage: required
+	Value type: <stringlist>
+	Definition: must be:
+		    "ti,lm3533"
+
+- reg:
+	Usage: required
+	Value type: <u32>
+	Definition: i2c address of the LM3533 chip
+
+- als-supply:
+	Usage: optional
+	Value type: <prop-encoded-array>
+	Definition: reference to regulator powering the V_als input; as
+		    specified in "../regulator/regulator.txt"
+
+- hwen-gpios:
+	Usage: required
+	Value type: <prop-encoded-array>
+	Definition: reference to gpio pin connected to the HWEN input; as
+		    specified in "../gpio/gpio.txt"
+
+- ti,boost-freq-hz:
+	Usage: required
+	Value type: <u32>
+	Definition: switch-frequency of the boost converter, must be either:
+		    500000 or 1000000
+
+- ti,boost-ovp-mv:
+	Usage: required
+	Value type: <u32>
+	Definition: over-voltage protection limit, in mV. Must be one of:
+		    16000, 24000, 32000 or 40000
+
+- #address-cells:
+	Usage: required
+	Value type: <u32>
+	Definition: must be 1
+
+- #size-cells:
+	Usage: required
+	Value type: <u32>
+	Definition: must be 0
+
+= ALS SUBNODE
+The ambient light sensor subnode carrying the light sensor related properties.
+
+- compatible:
+	Usage: required
+	Value type: <stringlist>
+	Definition: must be:
+		    "ti,lm3533-als"
+
+- ti,als-resistance-ohm:
+	Usage: required (unless ti,pwm-mode is specified)
+	Value type: <u32>
+	Definition: specifies the resistor value (R_als), in Ohm. Valid values
+		    ranges from 200000 to 1574 Ohm.
+
+- ti,pwm-mode:
+	Usage: optional
+	Value type: <empty>
+	Definition: specifies, if present, that the als should operate in PWM
+		    mode - rather than analog mode
+
+= BACKLIGHT NODES
+Backlight subnodes carrying the backlight related properties.
+
+- compatible:
+	Usage: required
+	Value type: <stringlist>
+	Definition: must be:
+		    "ti,lm3533-backlight"
+
+- reg:
+	Usage: required
+	Value type: <u32>
+	Definition: specifies which of the two backlights this node corresponds
+		    to
+
+- default-brightness:
+	Usage: optional
+	Value type: <32>
+	Definition: specifies the default brightness for the backlight, in
+		    units of brightness [0-255]
+
+- label:
+	Usage: required
+	Value type: <string>
+	Definition: specifies a name of this backlight
+
+- led-max-microamp:
+	Usage: required
+	Value type: <u32>
+	Definition: specifies the max current for this backlight, in uA, as
+		    described in "../leds/common.txt"
+
+- ti,pwm-zones:
+	Usage: optional
+	Value type: <u32 list>
+	Definition: lists the ALS zones to be PWM controlled for this backlight,
+		    the values in the list are in the range [0 - 4]
+
+= LED NODES
+LED subnodes carrying the LED related properties.
+
+- compatible:
+	Usage: required
+	Value type: <stringlist>
+	Definition: must be:
+		    "ti,lm3533-led"
+
+- reg:
+	Usage: required
+	Value type: <u32>
+	Definition: specifies which of the four LEDs this node corresponds to
+
+- linux,default-trigger:
+	Usage: optional
+	Value type: <string>
+	Definition: specifies the default trigger for the LED, as described in
+		    "../leds/common.txt"
+
+- label:
+	Usage: required
+	Value type: <string>
+	Definition: specifies a name of this LED, as described in
+		    "../leds/common.txt"
+
+- led-max-microamp:
+	Usage: required
+	Value type: <u32>
+	Definition: specifies the max current for this LED, in uA, as described
+		    in "../leds/common.txt"
+
+- ti,pwm-zones:
+	Usage: optional
+	Value type: <u32 list>
+	Definition: lists the ALS zones to be PWM controlled for this LED, the
+		    values in the list are in the range [0 - 4]
+
+= EXAMPLE
+
+i2c@12460000 {
+	compatible = "qcom,i2c-qup-v1.1.1";
+	...
+
+	lm3533@36 {
+		compatible = "ti,lm3533";
+		reg = <0x36>;
+
+		als-supply = <&pm8921_l11>;
+		hwen-gpios = <&pm8921_gpio 26 GPIO_ACTIVE_HIGH>;
+
+		ti,boost-freq-hz = <500000>;
+		ti,boost-ovp-mv = <24000>;
+
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		als {
+			compatible = "ti,lm3533-als";
+			ti,als-resistance-ohm = <200000>;
+		};
+
+		backlight@0 {
+			compatible = "ti,lm3533-backlight";
+			reg = <0>;
+			label = "backlight";
+
+			led-max-microamp = <20200>;
+		};
+
+		led@0 {
+			compatible = "ti,lm3533-led";
+			reg = <0>;
+			label = "red";
+
+			led-max-microamp = <5000>;
+		};
+
+		led@1 {
+			compatible = "ti,lm3533-led";
+			reg = <1>;
+			label = "green";
+
+			led-max-microamp = <5000>;
+		};
+
+		led@2 {
+			compatible = "ti,lm3533-led";
+			reg = <2>;
+			label = "blue";
+
+			led-max-microamp = <5000>;
+		};
+	};
+
-- 
2.11.0

[toc] | [next] | [standalone]

#1570323 — [PATCH v6 4/5] iio: light: lm3533-als: Support initialization from Device Tree

From: Bjorn Andersson <bjorn.andersson@sonymobile.com>

Implement support for initialization of the lm3533 als driver from
Device Tree.

Signed-off-by: Bjorn Andersson <bjorn.andersson@sonymobile.com>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
---

Note that this patch can be merged independently of the other patches in the
series.

Changes since v5:
- None

Changes since v4:
- None

Changes since v3:
- Moved als DT parsing from mfd driver
- Gave driver its own compatible

 drivers/iio/light/lm3533-als.c | 40 +++++++++++++++++++++++++++++++++++++++-
 1 file changed, 39 insertions(+), 1 deletion(-)

diff --git a/drivers/iio/light/lm3533-als.c b/drivers/iio/light/lm3533-als.c
index f409c2047c05..eef9f06eb0b1 100644
--- a/drivers/iio/light/lm3533-als.c
+++ b/drivers/iio/light/lm3533-als.c
@@ -20,6 +20,7 @@
 #include <linux/module.h>
 #include <linux/mutex.h>
 #include <linux/mfd/core.h>
+#include <linux/of.h>
 #include <linux/platform_device.h>
 #include <linux/slab.h>
 #include <linux/uaccess.h>
@@ -831,6 +832,32 @@ static const struct iio_info lm3533_als_info = {
 	.read_raw	= &lm3533_als_read_raw,
 };
 
+static struct lm3533_als_platform_data *lm3533_als_of_parse(struct device *dev)
+{
+	struct lm3533_als_platform_data *als_pdata;
+	struct device_node *node = dev->of_node;
+	int ret;
+	u32 val;
+
+	als_pdata = devm_kzalloc(dev, sizeof(*als_pdata), GFP_KERNEL);
+	if (!als_pdata)
+		return NULL;
+
+	als_pdata->pwm_mode = of_property_read_bool(node, "ti,pwm-mode");
+
+	ret = of_property_read_u32(node, "ti,als-resistance-ohm", &val);
+	if (ret < 0 && ret != -EINVAL) {
+		dev_err(dev, "unable to read ti,als-resistance-ohm");
+		return NULL;
+	}
+
+	/* Leave at high-Z, if the property was omitted or specified as 0 */
+	if (!ret && val != 0)
+		als_pdata->r_select = 200000 / val;
+
+	return als_pdata;
+}
+
 static int lm3533_als_probe(struct platform_device *pdev)
 {
 	struct lm3533 *lm3533;
@@ -843,7 +870,11 @@ static int lm3533_als_probe(struct platform_device *pdev)
 	if (!lm3533)
 		return -EINVAL;
 
-	pdata = pdev->dev.platform_data;
+	if (pdev->dev.of_node)
+		pdata = lm3533_als_of_parse(&pdev->dev);
+	else
+		pdata = pdev->dev.platform_data;
+
 	if (!pdata) {
 		dev_err(&pdev->dev, "no platform data\n");
 		return -EINVAL;
@@ -914,9 +945,16 @@ static int lm3533_als_remove(struct platform_device *pdev)
 	return 0;
 }
 
+static const struct of_device_id lm3533_als_of_match[] = {
+	{ .compatible = "ti,lm3533-als", },
+	{ },
+};
+MODULE_DEVICE_TABLE(of, lm3533_als_of_match);
+
 static struct platform_driver lm3533_als_driver = {
 	.driver	= {
 		.name	= "lm3533-als",
+		.of_match_table = lm3533_als_of_match,
 	},
 	.probe		= lm3533_als_probe,
 	.remove		= lm3533_als_remove,
-- 
2.11.0

[toc] | [prev] | [next] | [standalone]

#1570447 — Re: [PATCH v6 4/5] iio: light: lm3533-als: Support initialization from Device Tree

> Implement support for initialization of the lm3533 als driver from
> Device Tree.

minor comment below
 
> Signed-off-by: Bjorn Andersson <bjorn.andersson@sonymobile.com>
> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
> ---
> 
> Note that this patch can be merged independently of the other patches in the
> series.
> 
> Changes since v5:
> - None
> 
> Changes since v4:
> - None
> 
> Changes since v3:
> - Moved als DT parsing from mfd driver
> - Gave driver its own compatible
> 
>  drivers/iio/light/lm3533-als.c | 40 +++++++++++++++++++++++++++++++++++++++-
>  1 file changed, 39 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/iio/light/lm3533-als.c b/drivers/iio/light/lm3533-als.c
> index f409c2047c05..eef9f06eb0b1 100644
> --- a/drivers/iio/light/lm3533-als.c
> +++ b/drivers/iio/light/lm3533-als.c
> @@ -20,6 +20,7 @@
>  #include <linux/module.h>
>  #include <linux/mutex.h>
>  #include <linux/mfd/core.h>
> +#include <linux/of.h>
>  #include <linux/platform_device.h>
>  #include <linux/slab.h>
>  #include <linux/uaccess.h>
> @@ -831,6 +832,32 @@ static const struct iio_info lm3533_als_info = {
>  	.read_raw	= &lm3533_als_read_raw,
>  };
>  
> +static struct lm3533_als_platform_data *lm3533_als_of_parse(struct device *dev)
> +{
> +	struct lm3533_als_platform_data *als_pdata;
> +	struct device_node *node = dev->of_node;
> +	int ret;
> +	u32 val;
> +
> +	als_pdata = devm_kzalloc(dev, sizeof(*als_pdata), GFP_KERNEL);
> +	if (!als_pdata)
> +		return NULL;
> +
> +	als_pdata->pwm_mode = of_property_read_bool(node, "ti,pwm-mode");
> +
> +	ret = of_property_read_u32(node, "ti,als-resistance-ohm", &val);
> +	if (ret < 0 && ret != -EINVAL) {
> +		dev_err(dev, "unable to read ti,als-resistance-ohm");

\n missing

> +		return NULL;
> +	}
> +
> +	/* Leave at high-Z, if the property was omitted or specified as 0 */
> +	if (!ret && val != 0)
> +		als_pdata->r_select = 200000 / val;
> +
> +	return als_pdata;
> +}
> +
>  static int lm3533_als_probe(struct platform_device *pdev)
>  {
>  	struct lm3533 *lm3533;
> @@ -843,7 +870,11 @@ static int lm3533_als_probe(struct platform_device *pdev)
>  	if (!lm3533)
>  		return -EINVAL;
>  
> -	pdata = pdev->dev.platform_data;
> +	if (pdev->dev.of_node)
> +		pdata = lm3533_als_of_parse(&pdev->dev);
> +	else
> +		pdata = pdev->dev.platform_data;
> +
>  	if (!pdata) {
>  		dev_err(&pdev->dev, "no platform data\n");
>  		return -EINVAL;
> @@ -914,9 +945,16 @@ static int lm3533_als_remove(struct platform_device *pdev)
>  	return 0;
>  }
>  
> +static const struct of_device_id lm3533_als_of_match[] = {
> +	{ .compatible = "ti,lm3533-als", },
> +	{ },
> +};
> +MODULE_DEVICE_TABLE(of, lm3533_als_of_match);
> +
>  static struct platform_driver lm3533_als_driver = {
>  	.driver	= {
>  		.name	= "lm3533-als",
> +		.of_match_table = lm3533_als_of_match,
>  	},
>  	.probe		= lm3533_als_probe,
>  	.remove		= lm3533_als_remove,
> 

-- 

Peter Meerwald-Stadler
+43-664-2444418 (mobile)

[toc] | [prev] | [next] | [standalone]

#1570324 — [PATCH v6 3/5] backlight: lm3533: Support initialization from Device Tree

From: Bjorn Andersson <bjorn.andersson@sonymobile.com>

Implement support for initialization of the lm3533 backlight from Device
Tree.

Acked-by: Jingoo Han <jingoohan1@gmail.com>
Acked-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Bjorn Andersson <bjorn.andersson@sonymobile.com>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
---

Note that this patch can be merged independently of the other patches in the
series.

Changes since v5:
- None

Changes since v4:
- Acks from Pavel and Jingoo

Changes since v3:
- Moved backlight DT parsing from mfd driver
- Gave driver its own compatible

 drivers/video/backlight/lm3533_bl.c | 98 +++++++++++++++++++++++++++++++++++--
 1 file changed, 95 insertions(+), 3 deletions(-)

diff --git a/drivers/video/backlight/lm3533_bl.c b/drivers/video/backlight/lm3533_bl.c
index 0e2337f367b6..2f132199e604 100644
--- a/drivers/video/backlight/lm3533_bl.c
+++ b/drivers/video/backlight/lm3533_bl.c
@@ -22,6 +22,7 @@
 
 
 #define LM3533_HVCTRLBANK_COUNT		2
+#define LM3533_BL_DEFAULT_BRIGHTNESS	200
 #define LM3533_BL_MAX_BRIGHTNESS	255
 
 #define LM3533_REG_CTRLBANK_AB_BCONF	0x1a
@@ -269,6 +270,86 @@ static int lm3533_bl_setup(struct lm3533_bl *bl,
 	return lm3533_ctrlbank_set_pwm(&bl->cb, pdata->pwm);
 }
 
+static int lm3533_of_parse_pwm_zones(struct device_node *node)
+{
+	const char *propname = "ti,pwm-zones";
+	u32 zones[5];
+	int count;
+	int ret;
+	int i;
+
+	count = of_property_count_u32_elems(node, propname);
+	if (count == -EINVAL)
+		return 0;
+	if (count <= 0)
+		return count;
+	if (count >= ARRAY_SIZE(zones))
+		return -EINVAL;
+
+	ret = of_property_read_u32_array(node, propname, zones, count);
+	if (ret < 0)
+		return ret;
+
+	/* Enable pwm input, and enable the selected zones */
+	ret = BIT(0);
+	for (i = 0; i < count; i++)
+		ret |= BIT(zones[i] + 1);
+
+	return ret;
+}
+
+static struct lm3533_bl_platform_data *lm3533_bl_of_parse(struct device *dev,
+							  int *id)
+{
+	struct lm3533_bl_platform_data *bl_pdata;
+	struct device_node *node = dev->of_node;
+	int ret;
+	u32 reg;
+	u32 val;
+
+	bl_pdata = devm_kzalloc(dev, sizeof(*bl_pdata), GFP_KERNEL);
+	if (!bl_pdata)
+		return NULL;
+
+	ret = of_property_read_u32(node, "reg", &reg);
+	if (ret < 0) {
+		dev_err(dev, "invalid reg property\n");
+		return NULL;
+	}
+	*id = reg;
+
+	ret = of_property_read_string(node, "label",
+				      (const char **)&bl_pdata->name);
+	if (ret < 0) {
+		dev_err(dev, "unable to parse label\n");
+		return NULL;
+	}
+
+	ret = of_property_read_u32(node, "led-max-microamp", &val);
+	if (ret < 0) {
+		dev_err(dev, "unable to parse led-max-microamp\n");
+		return NULL;
+	}
+	bl_pdata->max_current = val;
+
+	val = LM3533_BL_DEFAULT_BRIGHTNESS;
+	ret = of_property_read_u32(node, "default-brightness", &val);
+	if (ret < 0 && ret != -EINVAL) {
+		dev_err(dev, "unable to parse default-brightness\n");
+		return NULL;
+	}
+	bl_pdata->default_brightness = val;
+
+	ret = lm3533_of_parse_pwm_zones(node);
+	if (ret < 0) {
+		dev_err(dev, "failed to parse ti,pwm-zones\n");
+		return NULL;
+	}
+	bl_pdata->pwm = ret;
+
+	return bl_pdata;
+}
+
 static int lm3533_bl_probe(struct platform_device *pdev)
 {
 	struct lm3533 *lm3533;
@@ -277,6 +358,7 @@ static int lm3533_bl_probe(struct platform_device *pdev)
 	struct backlight_device *bd;
 	struct backlight_properties props;
 	int ret;
+	int id;
 
 	dev_dbg(&pdev->dev, "%s\n", __func__);
 
@@ -284,14 +366,17 @@ static int lm3533_bl_probe(struct platform_device *pdev)
 	if (!lm3533)
 		return -EINVAL;
 
+	id = pdev->id;
 	pdata = dev_get_platdata(&pdev->dev);
+	if (!pdata)
+		pdata = lm3533_bl_of_parse(&pdev->dev, &id);
 	if (!pdata) {
 		dev_err(&pdev->dev, "no platform data\n");
 		return -EINVAL;
 	}
 
-	if (pdev->id < 0 || pdev->id >= LM3533_HVCTRLBANK_COUNT) {
-		dev_err(&pdev->dev, "illegal backlight id %d\n", pdev->id);
+	if (id < 0 || id >= LM3533_HVCTRLBANK_COUNT) {
+		dev_err(&pdev->dev, "illegal backlight id %d\n", id);
 		return -EINVAL;
 	}
 
@@ -300,7 +385,7 @@ static int lm3533_bl_probe(struct platform_device *pdev)
 		return -ENOMEM;
 
 	bl->lm3533 = lm3533;
-	bl->id = pdev->id;
+	bl->id = id;
 
 	bl->cb.lm3533 = lm3533;
 	bl->cb.id = lm3533_bl_get_ctrlbank_id(bl);
@@ -394,10 +479,17 @@ static void lm3533_bl_shutdown(struct platform_device *pdev)
 	lm3533_ctrlbank_disable(&bl->cb);
 }
 
+static const struct of_device_id lm3533_bl_of_match[] = {
+	{ .compatible = "ti,lm3533-backlight", },
+	{ },
+};
+MODULE_DEVICE_TABLE(of, lm3533_bl_of_match);
+
 static struct platform_driver lm3533_bl_driver = {
 	.driver = {
 		.name	= "lm3533-backlight",
 		.pm	= &lm3533_bl_pm_ops,
+		.of_match_table = lm3533_bl_of_match,
 	},
 	.probe		= lm3533_bl_probe,
 	.remove		= lm3533_bl_remove,
-- 
2.11.0

[toc] | [prev] | [next] | [standalone]

#1576529 — Re: [PATCH v6 3/5] backlight: lm3533: Support initialization from Device Tree

Cc'ing Daniel Thompson, the new Maintainer.

On Mon, 30 Jan 2017, Bjorn Andersson wrote:

> From: Bjorn Andersson <bjorn.andersson@sonymobile.com>
> 
> Implement support for initialization of the lm3533 backlight from Device
> Tree.
> 
> Acked-by: Jingoo Han <jingoohan1@gmail.com>
> Acked-by: Pavel Machek <pavel@ucw.cz>
> Signed-off-by: Bjorn Andersson <bjorn.andersson@sonymobile.com>
> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
> ---
> 
> Note that this patch can be merged independently of the other patches in the
> series.
> 
> Changes since v5:
> - None
> 
> Changes since v4:
> - Acks from Pavel and Jingoo
> 
> Changes since v3:
> - Moved backlight DT parsing from mfd driver
> - Gave driver its own compatible
> 
>  drivers/video/backlight/lm3533_bl.c | 98 +++++++++++++++++++++++++++++++++++--
>  1 file changed, 95 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/video/backlight/lm3533_bl.c b/drivers/video/backlight/lm3533_bl.c
> index 0e2337f367b6..2f132199e604 100644
> --- a/drivers/video/backlight/lm3533_bl.c
> +++ b/drivers/video/backlight/lm3533_bl.c
> @@ -22,6 +22,7 @@
>  
>  
>  #define LM3533_HVCTRLBANK_COUNT		2
> +#define LM3533_BL_DEFAULT_BRIGHTNESS	200
>  #define LM3533_BL_MAX_BRIGHTNESS	255
>  
>  #define LM3533_REG_CTRLBANK_AB_BCONF	0x1a
> @@ -269,6 +270,86 @@ static int lm3533_bl_setup(struct lm3533_bl *bl,
>  	return lm3533_ctrlbank_set_pwm(&bl->cb, pdata->pwm);
>  }
>  
> +static int lm3533_of_parse_pwm_zones(struct device_node *node)
> +{
> +	const char *propname = "ti,pwm-zones";
> +	u32 zones[5];
> +	int count;
> +	int ret;
> +	int i;
> +
> +	count = of_property_count_u32_elems(node, propname);
> +	if (count == -EINVAL)
> +		return 0;
> +	if (count <= 0)
> +		return count;
> +	if (count >= ARRAY_SIZE(zones))
> +		return -EINVAL;
> +
> +	ret = of_property_read_u32_array(node, propname, zones, count);
> +	if (ret < 0)
> +		return ret;
> +
> +	/* Enable pwm input, and enable the selected zones */
> +	ret = BIT(0);
> +	for (i = 0; i < count; i++)
> +		ret |= BIT(zones[i] + 1);
> +
> +	return ret;
> +}
> +
> +static struct lm3533_bl_platform_data *lm3533_bl_of_parse(struct device *dev,
> +							  int *id)
> +{
> +	struct lm3533_bl_platform_data *bl_pdata;
> +	struct device_node *node = dev->of_node;
> +	int ret;
> +	u32 reg;
> +	u32 val;
> +
> +	bl_pdata = devm_kzalloc(dev, sizeof(*bl_pdata), GFP_KERNEL);
> +	if (!bl_pdata)
> +		return NULL;
> +
> +	ret = of_property_read_u32(node, "reg", &reg);
> +	if (ret < 0) {
> +		dev_err(dev, "invalid reg property\n");
> +		return NULL;
> +	}
> +	*id = reg;
> +
> +	ret = of_property_read_string(node, "label",
> +				      (const char **)&bl_pdata->name);
> +	if (ret < 0) {
> +		dev_err(dev, "unable to parse label\n");
> +		return NULL;
> +	}
> +
> +	ret = of_property_read_u32(node, "led-max-microamp", &val);
> +	if (ret < 0) {
> +		dev_err(dev, "unable to parse led-max-microamp\n");
> +		return NULL;
> +	}
> +	bl_pdata->max_current = val;
> +
> +	val = LM3533_BL_DEFAULT_BRIGHTNESS;
> +	ret = of_property_read_u32(node, "default-brightness", &val);
> +	if (ret < 0 && ret != -EINVAL) {
> +		dev_err(dev, "unable to parse default-brightness\n");
> +		return NULL;
> +	}
> +	bl_pdata->default_brightness = val;
> +
> +	ret = lm3533_of_parse_pwm_zones(node);
> +	if (ret < 0) {
> +		dev_err(dev, "failed to parse ti,pwm-zones\n");
> +		return NULL;
> +	}
> +	bl_pdata->pwm = ret;
> +
> +	return bl_pdata;
> +}
> +
>  static int lm3533_bl_probe(struct platform_device *pdev)
>  {
>  	struct lm3533 *lm3533;
> @@ -277,6 +358,7 @@ static int lm3533_bl_probe(struct platform_device *pdev)
>  	struct backlight_device *bd;
>  	struct backlight_properties props;
>  	int ret;
> +	int id;
>  
>  	dev_dbg(&pdev->dev, "%s\n", __func__);
>  
> @@ -284,14 +366,17 @@ static int lm3533_bl_probe(struct platform_device *pdev)
>  	if (!lm3533)
>  		return -EINVAL;
>  
> +	id = pdev->id;
>  	pdata = dev_get_platdata(&pdev->dev);
> +	if (!pdata)
> +		pdata = lm3533_bl_of_parse(&pdev->dev, &id);
>  	if (!pdata) {
>  		dev_err(&pdev->dev, "no platform data\n");
>  		return -EINVAL;
>  	}
>  
> -	if (pdev->id < 0 || pdev->id >= LM3533_HVCTRLBANK_COUNT) {
> -		dev_err(&pdev->dev, "illegal backlight id %d\n", pdev->id);
> +	if (id < 0 || id >= LM3533_HVCTRLBANK_COUNT) {
> +		dev_err(&pdev->dev, "illegal backlight id %d\n", id);
>  		return -EINVAL;
>  	}
>  
> @@ -300,7 +385,7 @@ static int lm3533_bl_probe(struct platform_device *pdev)
>  		return -ENOMEM;
>  
>  	bl->lm3533 = lm3533;
> -	bl->id = pdev->id;
> +	bl->id = id;
>  
>  	bl->cb.lm3533 = lm3533;
>  	bl->cb.id = lm3533_bl_get_ctrlbank_id(bl);
> @@ -394,10 +479,17 @@ static void lm3533_bl_shutdown(struct platform_device *pdev)
>  	lm3533_ctrlbank_disable(&bl->cb);
>  }
>  
> +static const struct of_device_id lm3533_bl_of_match[] = {
> +	{ .compatible = "ti,lm3533-backlight", },
> +	{ },
> +};
> +MODULE_DEVICE_TABLE(of, lm3533_bl_of_match);
> +
>  static struct platform_driver lm3533_bl_driver = {
>  	.driver = {
>  		.name	= "lm3533-backlight",
>  		.pm	= &lm3533_bl_pm_ops,
> +		.of_match_table = lm3533_bl_of_match,
>  	},
>  	.probe		= lm3533_bl_probe,
>  	.remove		= lm3533_bl_remove,

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog

[toc] | [prev] | [standalone]

Back to top | Article view | linux.kernel

csiph-web