[PATCH v3 0/3] Syscon support for iProc touchscreen driver

[PATCH v3 0/3] Syscon support for iProc touchscreen driver

[Raveendra Padasalagi]

This patchset is based on v4.5-rc3 tag and its tested on
Broadcom Cygnus SoC.

The patches can be fetched from iproc-tsc-v3 branch of
https://github.com/Broadcom/arm64-linux.git

Changes since v2:
 - Omitted '0x' in "tsc node" definition in dt documentation file
 - Omitted '0x' in "ts_adc_syscon" definition in dt documentation file
 - Added "brcm,iproc-ts-adc-syscon" compatible string in "ts_adc_syscon"
   node. Updated dt documentation file to reflect this change.

Raveendra Padasalagi (3):
  input: cygnus-update touchscreen dt node document
  input: syscon support in bcm_iproc_tsc driver
  ARM: dts: use syscon in cygnus touchscreen dt node

 .../input/touchscreen/brcm,iproc-touchscreen.txt   |  59 +++++++-
 arch/arm/boot/dts/bcm-cygnus.dtsi                  |  11 +-
 drivers/input/touchscreen/bcm_iproc_tsc.c          | 152 +++++++++++++++------
 3 files changed, 173 insertions(+), 49 deletions(-)

-- 
1.9.1

[PATCH v3 1/3] input: cygnus-update touchscreen dt node document

[Raveendra Padasalagi]

In Cygnus SOC touch screen controller registers are shared
with ADC and flex timer. Using readl/writel could lead to
race condition. So touch screen driver is enhanced to support

1. If touchscreen register's are not shared. Register access
is handled through readl/writel if "brcm,iproc-touchscreen"
compatible is provided in touchscreen dt node. This will help
for future SOC's if comes with dedicated touchscreen IP register's.

2. If touchscreen register's are shared with other IP's, register
access is handled through syscon framework API's to take care of
mutually exclusive access. This feature can be enabled by selecting
"brcm,iproc-touchscreen-syscon" compatible string in the touchscreen
dt node.

Hence touchscreen dt node bindings document is updated to take care
of above changes in the touchscreen driver.

Signed-off-by: Raveendra Padasalagi <raveendra.padasalagi@broadcom.com>
Reviewed-by: Ray Jui <ray.jui@broadcom.com>
Reviewed-by: Scott Branden <scott.branden@broadcom.com>
---
 .../input/touchscreen/brcm,iproc-touchscreen.txt   | 59 +++++++++++++++++++---
 1 file changed, 52 insertions(+), 7 deletions(-)

diff --git a/Documentation/devicetree/bindings/input/touchscreen/brcm,iproc-touchscreen.txt b/Documentation/devicetree/bindings/input/touchscreen/brcm,iproc-touchscreen.txt
index 34e3382..c186162 100644
--- a/Documentation/devicetree/bindings/input/touchscreen/brcm,iproc-touchscreen.txt
+++ b/Documentation/devicetree/bindings/input/touchscreen/brcm,iproc-touchscreen.txt
@@ -1,12 +1,30 @@
 * Broadcom's IPROC Touchscreen Controller
 
 Required properties:
-- compatible: must be "brcm,iproc-touchscreen"
-- reg: physical base address of the controller and length of memory mapped
-  region.
+- compatible: should be one of
+        "brcm,iproc-touchscreen"
+        "brcm,iproc-touchscreen-syscon"
+- ts_syscon: if "brcm,iproc-touchscreen-syscon" compatible string
+  is selected then "ts_syscon" is mandatory or else not required.
+  The "ts_syscon" is handler of syscon node defining physical base
+  address of the controller and length of memory mapped region.
+  If this property is selected please make sure MFD_SYSCON config
+  is enabled in the defconfig file.
+- reg: if "brcm,iproc-touchscreen" compatible string is selected
+  then "reg" property is mandatory or else not required.
+  The "reg" should be physical base address of the controller and
+  length of memory mapped region.
 - clocks:  The clock provided by the SOC to driver the tsc
 - clock-name:  name for the clock
 - interrupts: The touchscreen controller's interrupt
+- address-cells: Specify the number of u32 entries needed in child nodes.
+                 Should set to 1. This property is mandatory when
+                 "brcm,iproc-touchscreen-syscon" compatible string is selected
+                 or else not required.
+- size-cells: Specify number of u32 entries needed to specify child nodes size
+              in reg property. Should set to 1.This property is mandatory when
+              "brcm,iproc-touchscreen-syscon" compatible string is selected or
+              else not required.
 
 Optional properties:
 - scanning_period: Time between scans. Each step is 1024 us.  Valid 1-256.
@@ -53,13 +71,40 @@ Optional properties:
 - touchscreen-inverted-x: X axis is inverted (boolean)
 - touchscreen-inverted-y: Y axis is inverted (boolean)
 
-Example:
+Example 1: An example of touchscreen node with "brcm,iproc-touchscreen-syscon"
+           compatible string.
 
-	touchscreen: tsc@0x180A6000 {
-		compatible = "brcm,iproc-touchscreen";
+	ts_adc_syscon: ts_adc_syscon@180a6000 {
+		compatible = "brcm,iproc-ts-adc-syscon","syscon";
+		reg = <0x180a6000 0xc30>;
+	};
+
+	touchscreen: tsc@180A6000 {
+		compatible = "brcm,iproc-touchscreen-syscon";
 		#address-cells = <1>;
 		#size-cells = <1>;
-		reg = <0x180A6000 0x40>;
+		ts_syscon = <&ts_adc_syscon>;
+		clocks = <&adc_clk>;
+		clock-names = "tsc_clk";
+		interrupts = <GIC_SPI 164 IRQ_TYPE_LEVEL_HIGH>;
+
+		scanning_period = <5>;
+		debounce_timeout = <40>;
+		settling_timeout = <7>;
+		touch_timeout = <10>;
+		average_data = <5>;
+		fifo_threshold = <1>;
+		/* Touchscreen is rotated 180 degrees. */
+		touchscreen-inverted-x;
+		touchscreen-inverted-y;
+	};
+
+Example 2: An example of touchscreen node with "brcm,iproc-touchscreen"
+          compatible string.
+
+	touchscreen: tsc@180A6000 {
+		compatible = "brcm,iproc-touchscreen";
+		reg = <0x180a6000 0x40>;
 		clocks = <&adc_clk>;
 		clock-names = "tsc_clk";
 		interrupts = <GIC_SPI 164 IRQ_TYPE_LEVEL_HIGH>;
-- 
1.9.1

[PATCH v3 2/3] input: syscon support in bcm_iproc_tsc driver

[Raveendra Padasalagi]

In Cygnus SOC touch screen controller registers are shared
with ADC and flex timer. Using readl/writel could lead to
race condition. So touch screen driver is enhanced to support

1. If touchscreen register's are not shared. Register access
is handled through readl/writel if "brcm,iproc-touchscreen"
compatible is provided in touchscreen dt node. This will help
for future SOC's if comes with dedicated touchscreen IP register's.

2. If touchscreen register's are shared with other IP's, register
access is handled through syscon framework API's to take care of
mutually exclusive access. This feature can be enabled by selecting
"brcm,iproc-touchscreen-syscon" compatible string in the touchscreen
dt node.

Signed-off-by: Raveendra Padasalagi <raveendra.padasalagi@broadcom.com>
Reviewed-by: Ray Jui <ray.jui@broadcom.com>
Reviewed-by: Scott Branden <scott.branden@broadcom.com>
---
 drivers/input/touchscreen/bcm_iproc_tsc.c | 152 ++++++++++++++++++++++--------
 1 file changed, 112 insertions(+), 40 deletions(-)

diff --git a/drivers/input/touchscreen/bcm_iproc_tsc.c b/drivers/input/touchscreen/bcm_iproc_tsc.c
index ae460a5c..3ef80c6 100644
--- a/drivers/input/touchscreen/bcm_iproc_tsc.c
+++ b/drivers/input/touchscreen/bcm_iproc_tsc.c
@@ -23,6 +23,8 @@
 #include <linux/io.h>
 #include <linux/clk.h>
 #include <linux/serio.h>
+#include <linux/mfd/syscon.h>
+#include <linux/regmap.h>
 
 #define IPROC_TS_NAME "iproc-ts"
 
@@ -88,7 +90,7 @@
 #define TS_WIRE_MODE_BIT        BIT(1)
 
 #define dbg_reg(dev, priv, reg) \
-	dev_dbg(dev, "%20s= 0x%08x\n", #reg, readl((priv)->regs + reg))
+	dev_dbg(dev, "%20s= 0x%08x\n", #reg, iproc_reg_read(priv, reg))
 
 struct tsc_param {
 	/* Each step is 1024 us.  Valid 1-256 */
@@ -142,12 +144,18 @@ struct iproc_ts_priv {
 	struct input_dev *idev;
 
 	void __iomem *regs;
+	struct regmap *regmap;
 	struct clk *tsc_clk;
 
 	int  pen_status;
 	struct tsc_param cfg_params;
 };
 
+enum iproc_ts_reg_type {
+	IPROC_TS_REG,
+	IPROC_TS_SYSCON,
+};
+
 /*
  * Set default values the same as hardware reset values
  * except for fifo_threshold with is set to 1.
@@ -163,6 +171,41 @@ static const struct tsc_param iproc_default_config = {
 	.max_y            = Y_MAX,
 };
 
+static int iproc_reg_update_bits(struct iproc_ts_priv *priv, u32 reg,
+			   u32 mask, u32 val)
+{
+	int ret = 0;
+	u32 tmp, orig;
+
+	if (priv->regs) {
+		orig = readl(priv->regs);
+		tmp = orig & ~mask;
+		tmp |= val & mask;
+		writel(tmp, priv->regs + reg);
+	} else
+		ret = regmap_update_bits(priv->regmap, reg, mask, val);
+	return ret;
+}
+
+static void iproc_reg_write(struct iproc_ts_priv *priv, u32 reg, u32 val)
+{
+	if (priv->regs)
+		writel(val, priv->regs + reg);
+	else
+		regmap_write(priv->regmap, reg, val);
+}
+
+static u32 iproc_reg_read(struct iproc_ts_priv *priv, u32 reg)
+{
+	u32 val;
+
+	if (priv->regs)
+		val = readl(priv->regs + reg);
+	else
+		regmap_read(priv->regmap, reg, &val);
+	return val;
+}
+
 static void ts_reg_dump(struct iproc_ts_priv *priv)
 {
 	struct device *dev = &priv->pdev->dev;
@@ -196,22 +239,22 @@ static irqreturn_t iproc_touchscreen_interrupt(int irq, void *data)
 	int i;
 	bool needs_sync = false;
 
-	intr_status = readl(priv->regs + INTERRUPT_STATUS);
-	intr_status &= TS_PEN_INTR_MASK | TS_FIFO_INTR_MASK;
+	intr_status = iproc_reg_read(priv, INTERRUPT_STATUS);
+	intr_status &= (TS_PEN_INTR_MASK | TS_FIFO_INTR_MASK);
 	if (intr_status == 0)
 		return IRQ_NONE;
 
 	/* Clear all interrupt status bits, write-1-clear */
-	writel(intr_status, priv->regs + INTERRUPT_STATUS);
-
+	iproc_reg_write(priv, INTERRUPT_STATUS, intr_status);
 	/* Pen up/down */
 	if (intr_status & TS_PEN_INTR_MASK) {
-		if (readl(priv->regs + CONTROLLER_STATUS) & TS_PEN_DOWN)
+		priv->pen_status = iproc_reg_read(priv, CONTROLLER_STATUS);
+		if (priv->pen_status & TS_PEN_DOWN)
 			priv->pen_status = PEN_DOWN_STATUS;
 		else
 			priv->pen_status = PEN_UP_STATUS;
 
-		input_report_key(priv->idev, BTN_TOUCH, priv->pen_status);
+		input_report_key(priv->idev, BTN_TOUCH,	priv->pen_status);
 		needs_sync = true;
 
 		dev_dbg(&priv->pdev->dev,
@@ -221,7 +264,7 @@ static irqreturn_t iproc_touchscreen_interrupt(int irq, void *data)
 	/* coordinates in FIFO exceed the theshold */
 	if (intr_status & TS_FIFO_INTR_MASK) {
 		for (i = 0; i < priv->cfg_params.fifo_threshold; i++) {
-			raw_coordinate = readl(priv->regs + FIFO_DATA);
+			raw_coordinate = iproc_reg_read(priv, FIFO_DATA);
 			if (raw_coordinate == INVALID_COORD)
 				continue;
 
@@ -239,7 +282,7 @@ static irqreturn_t iproc_touchscreen_interrupt(int irq, void *data)
 			x = (x >> 4) & 0x0FFF;
 			y = (y >> 4) & 0x0FFF;
 
-			/* adjust x y according to lcd tsc mount angle */
+			/* Adjust x y according to LCD tsc mount angle. */
 			if (priv->cfg_params.invert_x)
 				x = priv->cfg_params.max_x - x;
 
@@ -262,9 +305,10 @@ static irqreturn_t iproc_touchscreen_interrupt(int irq, void *data)
 
 static int iproc_ts_start(struct input_dev *idev)
 {
-	struct iproc_ts_priv *priv = input_get_drvdata(idev);
 	u32 val;
+	u32 mask;
 	int error;
+	struct iproc_ts_priv *priv = input_get_drvdata(idev);
 
 	/* Enable clock */
 	error = clk_prepare_enable(priv->tsc_clk);
@@ -279,9 +323,10 @@ static int iproc_ts_start(struct input_dev *idev)
 	 *  FIFO reaches the int_th value, and pen event(up/down)
 	 */
 	val = TS_PEN_INTR_MASK | TS_FIFO_INTR_MASK;
-	writel(val, priv->regs + INTERRUPT_MASK);
+	iproc_reg_update_bits(priv, INTERRUPT_MASK, val, val);
 
-	writel(priv->cfg_params.fifo_threshold, priv->regs + INTERRUPT_THRES);
+	val = priv->cfg_params.fifo_threshold;
+	iproc_reg_write(priv, INTERRUPT_THRES, val);
 
 	/* Initialize control reg1 */
 	val = 0;
@@ -289,26 +334,23 @@ static int iproc_ts_start(struct input_dev *idev)
 	val |= priv->cfg_params.debounce_timeout << DEBOUNCE_TIMEOUT_SHIFT;
 	val |= priv->cfg_params.settling_timeout << SETTLING_TIMEOUT_SHIFT;
 	val |= priv->cfg_params.touch_timeout << TOUCH_TIMEOUT_SHIFT;
-	writel(val, priv->regs + REGCTL1);
+	iproc_reg_write(priv, REGCTL1, val);
 
 	/* Try to clear all interrupt status */
-	val = readl(priv->regs + INTERRUPT_STATUS);
-	val |= TS_FIFO_INTR_MASK | TS_PEN_INTR_MASK;
-	writel(val, priv->regs + INTERRUPT_STATUS);
+	val = TS_FIFO_INTR_MASK | TS_PEN_INTR_MASK;
+	iproc_reg_update_bits(priv, INTERRUPT_STATUS, val, val);
 
 	/* Initialize control reg2 */
-	val = readl(priv->regs + REGCTL2);
-	val |= TS_CONTROLLER_EN_BIT | TS_WIRE_MODE_BIT;
-
-	val &= ~TS_CONTROLLER_AVGDATA_MASK;
+	val = TS_CONTROLLER_EN_BIT | TS_WIRE_MODE_BIT;
 	val |= priv->cfg_params.average_data << TS_CONTROLLER_AVGDATA_SHIFT;
 
-	val &= ~(TS_CONTROLLER_PWR_LDO |	/* PWR up LDO */
+	mask = (TS_CONTROLLER_AVGDATA_MASK);
+	mask |= (TS_CONTROLLER_PWR_LDO |	/* PWR up LDO */
 		   TS_CONTROLLER_PWR_ADC |	/* PWR up ADC */
 		   TS_CONTROLLER_PWR_BGP |	/* PWR up BGP */
 		   TS_CONTROLLER_PWR_TS);	/* PWR up TS */
-
-	writel(val, priv->regs + REGCTL2);
+	mask |= val;
+	iproc_reg_update_bits(priv, REGCTL2, mask, val);
 
 	ts_reg_dump(priv);
 
@@ -320,12 +362,17 @@ static void iproc_ts_stop(struct input_dev *dev)
 	u32 val;
 	struct iproc_ts_priv *priv = input_get_drvdata(dev);
 
-	writel(0, priv->regs + INTERRUPT_MASK); /* Disable all interrupts */
+	/*
+	 * Disable FIFO int_th and pen event(up/down)Interrupts only
+	 * as the interrupt mask register is shared between ADC, TS and
+	 * flextimer.
+	 */
+	val = TS_PEN_INTR_MASK | TS_FIFO_INTR_MASK;
+	iproc_reg_update_bits(priv, INTERRUPT_MASK, val, 0);
 
 	/* Only power down touch screen controller */
-	val = readl(priv->regs + REGCTL2);
-	val |= TS_CONTROLLER_PWR_TS;
-	writel(val, priv->regs + REGCTL2);
+	val = TS_CONTROLLER_PWR_TS;
+	iproc_reg_update_bits(priv, REGCTL2, val, val);
 
 	clk_disable(priv->tsc_clk);
 }
@@ -410,25 +457,56 @@ static int iproc_get_tsc_config(struct device *dev, struct iproc_ts_priv *priv)
 	return 0;
 }
 
+static const struct of_device_id iproc_ts_of_match[] = {
+	{.compatible = "brcm,iproc-touchscreen",
+	 .data = (void *) IPROC_TS_REG },
+	{.compatible = "brcm,iproc-touchscreen-syscon",
+	 .data = (void *) IPROC_TS_SYSCON },
+	{},
+};
+MODULE_DEVICE_TABLE(of, iproc_ts_of_match);
+
 static int iproc_ts_probe(struct platform_device *pdev)
 {
 	struct iproc_ts_priv *priv;
 	struct input_dev *idev;
 	struct resource *res;
+	const struct of_device_id *of_id;
 	int irq;
 	int error;
+	enum iproc_ts_reg_type reg_access;
 
 	priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
 	if (!priv)
 		return -ENOMEM;
 
-	/* touchscreen controller memory mapped regs */
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	priv->regs = devm_ioremap_resource(&pdev->dev, res);
-	if (IS_ERR(priv->regs)) {
-		error = PTR_ERR(priv->regs);
-		dev_err(&pdev->dev, "unable to map I/O memory: %d\n", error);
-		return error;
+	of_id = of_match_node(iproc_ts_of_match, pdev->dev.of_node);
+	if (of_id)
+		reg_access = (enum iproc_ts_reg_type)of_id->data;
+	else
+		return -ENODEV;
+
+	if (reg_access == IPROC_TS_SYSCON) {
+		/* touchscreen controller memory mapped regs via syscon */
+		priv->regmap = syscon_regmap_lookup_by_phandle(
+						pdev->dev.of_node,
+						"ts_syscon");
+		if (IS_ERR(priv->regmap)) {
+			error = PTR_ERR(priv->regs);
+			dev_err(&pdev->dev, "unable to map I/O memory:%d\n",
+				error);
+			return error;
+		}
+	} else {
+		/* touchscreen controller memory mapped regs */
+		res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+		priv->regs = devm_ioremap_resource(&pdev->dev, res);
+		if (IS_ERR(priv->regs)) {
+			error = PTR_ERR(priv->regs);
+			dev_err(&pdev->dev, "unable to map I/O memory:%d\n",
+				error);
+			return error;
+		}
 	}
 
 	priv->tsc_clk = devm_clk_get(&pdev->dev, "tsc_clk");
@@ -501,12 +579,6 @@ static int iproc_ts_probe(struct platform_device *pdev)
 	return 0;
 }
 
-static const struct of_device_id iproc_ts_of_match[] = {
-	{.compatible = "brcm,iproc-touchscreen", },
-	{ },
-};
-MODULE_DEVICE_TABLE(of, iproc_ts_of_match);
-
 static struct platform_driver iproc_ts_driver = {
 	.probe = iproc_ts_probe,
 	.driver = {
-- 
1.9.1

[PATCH v3 3/3] ARM: dts: use syscon in cygnus touchscreen dt node

[Raveendra Padasalagi]

In Cygnus SOC touch screen controller registers are shared
with ADC and flex timer. Using readl/writel could lead to
race condition. So in such case register access is handled
through syscon framework API's in the touch screen driver.
This feature is enabled if "brcm,iproc-touchscreen-syscon"
compatible string is selected in touchscreen dt node.

So this patch enables syscon support in touchscreen driver
by adding necessary properties in touchscreen dt node.

Signed-off-by: Raveendra Padasalagi <raveendra.padasalagi@broadcom.com>
Reviewed-by: Ray Jui <ray.jui@broadcom.com>
Reviewed-by: Scott Branden <scott.branden@broadcom.com>
---
 arch/arm/boot/dts/bcm-cygnus.dtsi | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/arch/arm/boot/dts/bcm-cygnus.dtsi b/arch/arm/boot/dts/bcm-cygnus.dtsi
index 3878793..1704dc0 100644
--- a/arch/arm/boot/dts/bcm-cygnus.dtsi
+++ b/arch/arm/boot/dts/bcm-cygnus.dtsi
@@ -351,9 +351,16 @@
 					<&pinctrl 142 10 1>;
 		};
 
+		ts_adc_syscon: ts_adc_syscon@180a6000 {
+			compatible = "brcm,iproc-ts-adc-syscon","syscon";
+			reg = <0x180a6000 0xc30>;
+		};
+
 		touchscreen: tsc@180a6000 {
-			compatible = "brcm,iproc-touchscreen";
-			reg = <0x180a6000 0x40>;
+			compatible = "brcm,iproc-touchscreen-syscon";
+			#address-cells = <1>;
+			#size-cells = <1>;
+			ts_syscon = <&ts_adc_syscon>;
 			clocks = <&asiu_clks BCM_CYGNUS_ASIU_ADC_CLK>;
 			clock-names = "tsc_clk";
 			interrupts = <GIC_SPI 164 IRQ_TYPE_LEVEL_HIGH>;
-- 
1.9.1

Re: [PATCH v3 3/3] ARM: dts: use syscon in cygnus touchscreen dt node

[Raveendra Padasalagi]

On Mon, Feb 22, 2016 at 1:19 PM, Raveendra Padasalagi
<raveendra.padasalagi@broadcom.com> wrote:
> In Cygnus SOC touch screen controller registers are shared
> with ADC and flex timer. Using readl/writel could lead to
> race condition. So in such case register access is handled
> through syscon framework API's in the touch screen driver.
> This feature is enabled if "brcm,iproc-touchscreen-syscon"
> compatible string is selected in touchscreen dt node.
>
> So this patch enables syscon support in touchscreen driver
> by adding necessary properties in touchscreen dt node.
>
> Signed-off-by: Raveendra Padasalagi <raveendra.padasalagi@broadcom.com>
> Reviewed-by: Ray Jui <ray.jui@broadcom.com>
> Reviewed-by: Scott Branden <scott.branden@broadcom.com>
> ---
>  arch/arm/boot/dts/bcm-cygnus.dtsi | 11 +++++++++--
>  1 file changed, 9 insertions(+), 2 deletions(-)
>
> diff --git a/arch/arm/boot/dts/bcm-cygnus.dtsi b/arch/arm/boot/dts/bcm-cygnus.dtsi
> index 3878793..1704dc0 100644
> --- a/arch/arm/boot/dts/bcm-cygnus.dtsi
> +++ b/arch/arm/boot/dts/bcm-cygnus.dtsi
> @@ -351,9 +351,16 @@
>                                         <&pinctrl 142 10 1>;
>                 };
>
> +               ts_adc_syscon: ts_adc_syscon@180a6000 {
> +                       compatible = "brcm,iproc-ts-adc-syscon","syscon";
> +                       reg = <0x180a6000 0xc30>;
> +               };
> +
>                 touchscreen: tsc@180a6000 {
> -                       compatible = "brcm,iproc-touchscreen";
> -                       reg = <0x180a6000 0x40>;
> +                       compatible = "brcm,iproc-touchscreen-syscon";

Hi Rob,
In patchset V2 you had a comment as to have only "syscon" support,
Since having "syscon" only support breaks the dt backward compatibility
as the existing driver has support for "reg".  So in patchset V3 I have
not addressed this comment yet. Waiting for your opinion on whether
to proceed with "syscon" only support.

-Raveendra
> +                       #address-cells = <1>;
> +                       #size-cells = <1>;
> +                       ts_syscon = <&ts_adc_syscon>;
>                         clocks = <&asiu_clks BCM_CYGNUS_ASIU_ADC_CLK>;
>                         clock-names = "tsc_clk";
>                         interrupts = <GIC_SPI 164 IRQ_TYPE_LEVEL_HIGH>;
> --
> 1.9.1
>