[PATCH v4 0/3] mfd: twl603x: add power button

[PATCH v4 0/3] mfd: twl603x: add power button

[akemnade]

Like the TWL4030, the TWL603x also has a power button feature,
so extend the TWL4030 power button driver to support TWL603x.

Signed-off-by: Andreas Kemnade <akemnade@kernel.org>
---
Changes in v4:
- reorder includes
- use register numbers in struct initializers directly
- Link to v3: https://patch.msgid.link/20251105-twl6030-button-v3-0-9b37eb2b0989@kernel.org

Changes in v3:
- static definition of chipdata
- stricter rules in common part of binding
- Link to v2: https://lore.kernel.org/r/20251030-twl6030-button-v2-0-09653d05a2b1@kernel.org

Changes in v2:
- integrate driver into existing TWL4030 driver
- improve commit messages
- Link to v1: https://lore.kernel.org/r/20251020-twl6030-button-v1-0-93e4644ac974@kernel.org

---
Andreas Kemnade (3):
      dt-bindings: mfd: twl: enable power button also for twl603x
      Input: twl4030 - add TWL603x power button
      ARM: dts: ti/omap: omap4-epson-embt2ws: add powerbutton

 Documentation/devicetree/bindings/mfd/ti,twl.yaml | 40 +++++++++++++---
 arch/arm/boot/dts/ti/omap/omap4-epson-embt2ws.dts |  5 ++
 drivers/input/misc/twl4030-pwrbutton.c            | 58 +++++++++++++++++++++--
 3 files changed, 93 insertions(+), 10 deletions(-)
---
base-commit: 3a8660878839faadb4f1a6dd72c3179c1df56787
change-id: 20251020-twl6030-button-83d759b060e6

Best regards,
--  
Andreas Kemnade <akemnade@kernel.org>

[PATCH v4 1/3] dt-bindings: mfd: twl: enable power button also for twl603x

[akemnade]

From: Andreas Kemnade <andreas@kemnade.info>

TWL603x has also a power button function, so add the corresponding subnode.
As not in all cases there is a power button connected to the corresponding
pad of the TWL603x, the functionality can be disabled by
status = "disabled" or simply not adding the subnode.
To keep things simple, follow the established design pattern of using const
interrupts as used also by the other subdevices.

Signed-off-by: Andreas Kemnade <andreas@kemnade.info>
---
 Documentation/devicetree/bindings/mfd/ti,twl.yaml | 40 +++++++++++++++++++----
 1 file changed, 34 insertions(+), 6 deletions(-)

diff --git a/Documentation/devicetree/bindings/mfd/ti,twl.yaml b/Documentation/devicetree/bindings/mfd/ti,twl.yaml
index 776b04e182cb..045fd07f476e 100644
--- a/Documentation/devicetree/bindings/mfd/ti,twl.yaml
+++ b/Documentation/devicetree/bindings/mfd/ti,twl.yaml
@@ -55,6 +55,15 @@ allOf:
 
         gpadc: false
 
+        pwrbutton:
+          properties:
+            compatible:
+              const: ti,twl4030-pwrbutton
+            interrupts:
+              items:
+                - items:
+                    const: 8
+
         usb-comparator: false
 
   - if:
@@ -95,7 +104,14 @@ allOf:
             compatible:
               const: ti,twl6030-gpadc
 
-        pwrbutton: false
+        pwrbutton:
+          properties:
+            compatible:
+              const: ti,twl6030-pwrbutton
+            interrupts:
+              items:
+                - items:
+                    const: 0
 
         madc: false
 
@@ -146,7 +162,14 @@ allOf:
             compatible:
               const: ti,twl6032-gpadc
 
-        pwrbutton: false
+        pwrbutton:
+          properties:
+            compatible:
+              const: ti,twl6030-pwrbutton
+            interrupts:
+              items:
+                - items:
+                    const: 0
 
         madc: false
 
@@ -226,11 +249,11 @@ properties:
 
     properties:
       compatible:
-        const: ti,twl4030-pwrbutton
+        enum:
+          - ti,twl4030-pwrbutton
+          - ti,twl6030-pwrbutton
       interrupts:
-        items:
-          - items:
-              const: 8
+        maxItems: 1
 
   watchdog:
     type: object
@@ -459,6 +482,11 @@ examples:
           #io-channel-cells = <1>;
         };
 
+        pwrbutton {
+          compatible = "ti,twl6030-pwrbutton";
+          interrupts = <0>;
+        };
+
         rtc {
           compatible = "ti,twl4030-rtc";
           interrupts = <8>;

-- 
2.47.3

[PATCH v4 2/3] Input: twl4030 - add TWL603x power button

[akemnade]

From: Andreas Kemnade <andreas@kemnade.info>

Like the TWL4030, these PMICs also have a power button feature, so extend
the TWL4030 power button driver. As the irqchip of the TWL6030 mfd driver
does not provide mask, unmask finctions, do it manually.

Signed-off-by: Andreas Kemnade <andreas@kemnade.info>
---
 drivers/input/misc/twl4030-pwrbutton.c | 58 +++++++++++++++++++++++++++++++---
 1 file changed, 54 insertions(+), 4 deletions(-)

diff --git a/drivers/input/misc/twl4030-pwrbutton.c b/drivers/input/misc/twl4030-pwrbutton.c
index f85cc289c053..8673b1b441bf 100644
--- a/drivers/input/misc/twl4030-pwrbutton.c
+++ b/drivers/input/misc/twl4030-pwrbutton.c
@@ -20,6 +20,7 @@
  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
 
+#include <linux/bits.h>
 #include <linux/module.h>
 #include <linux/init.h>
 #include <linux/kernel.h>
@@ -30,17 +31,31 @@
 #include <linux/platform_device.h>
 #include <linux/mfd/twl.h>
 
-#define PWR_PWRON_IRQ (1 << 0)
+#define PWR_PWRON_IRQ BIT(0)
 
-#define STS_HW_CONDITIONS 0xf
+struct twl_pwrbutton_chipdata {
+	u8 status_reg;
+	bool need_manual_irq;
+};
+
+static const struct twl_pwrbutton_chipdata twl4030_chipdata = {
+	.status_reg = 0xf,
+	.need_manual_irq = false,
+};
+
+static const struct twl_pwrbutton_chipdata twl6030_chipdata = {
+	.status_reg = 0x2,
+	.need_manual_irq = true,
+};
 
 static irqreturn_t powerbutton_irq(int irq, void *_pwr)
 {
 	struct input_dev *pwr = _pwr;
+	const struct twl_pwrbutton_chipdata *pdata = dev_get_drvdata(pwr->dev.parent);
 	int err;
 	u8 value;
 
-	err = twl_i2c_read_u8(TWL_MODULE_PM_MASTER, &value, STS_HW_CONDITIONS);
+	err = twl_i2c_read_u8(TWL_MODULE_PM_MASTER, &value, pdata->status_reg);
 	if (!err)  {
 		pm_wakeup_event(pwr->dev.parent, 0);
 		input_report_key(pwr, KEY_POWER, value & PWR_PWRON_IRQ);
@@ -55,10 +70,17 @@ static irqreturn_t powerbutton_irq(int irq, void *_pwr)
 
 static int twl4030_pwrbutton_probe(struct platform_device *pdev)
 {
+	const struct twl_pwrbutton_chipdata *pdata;
 	struct input_dev *pwr;
 	int irq = platform_get_irq(pdev, 0);
 	int err;
 
+	pdata = device_get_match_data(&pdev->dev);
+	if (!pdata)
+		return -EINVAL;
+
+	platform_set_drvdata(pdev, (void *)pdata);
+
 	pwr = devm_input_allocate_device(&pdev->dev);
 	if (!pwr) {
 		dev_err(&pdev->dev, "Can't allocate power button\n");
@@ -85,14 +107,41 @@ static int twl4030_pwrbutton_probe(struct platform_device *pdev)
 		return err;
 	}
 
+	if (pdata->need_manual_irq) {
+		err = twl6030_interrupt_unmask(0x01, REG_INT_MSK_LINE_A);
+		if (err < 0)
+			return err;
+
+		err = twl6030_interrupt_unmask(0x01, REG_INT_MSK_STS_A);
+		if (err < 0)
+			return err;
+	}
+
 	device_init_wakeup(&pdev->dev, true);
 
 	return 0;
 }
 
+static void twl4030_pwrbutton_remove(struct platform_device *pdev)
+{
+	const struct twl_pwrbutton_chipdata *pdata = platform_get_drvdata(pdev);
+
+	if (pdata->need_manual_irq) {
+		twl6030_interrupt_mask(0x01, REG_INT_MSK_LINE_A);
+		twl6030_interrupt_mask(0x01, REG_INT_MSK_STS_A);
+	}
+}
+
 #ifdef CONFIG_OF
 static const struct of_device_id twl4030_pwrbutton_dt_match_table[] = {
-       { .compatible = "ti,twl4030-pwrbutton" },
+	{
+		.compatible = "ti,twl4030-pwrbutton",
+		.data = &twl4030_chipdata,
+	},
+	{
+		.compatible = "ti,twl6030-pwrbutton",
+		.data = &twl6030_chipdata,
+	},
        {},
 };
 MODULE_DEVICE_TABLE(of, twl4030_pwrbutton_dt_match_table);
@@ -100,6 +149,7 @@ MODULE_DEVICE_TABLE(of, twl4030_pwrbutton_dt_match_table);
 
 static struct platform_driver twl4030_pwrbutton_driver = {
 	.probe		= twl4030_pwrbutton_probe,
+	.remove		= twl4030_pwrbutton_remove,
 	.driver		= {
 		.name	= "twl4030_pwrbutton",
 		.of_match_table = of_match_ptr(twl4030_pwrbutton_dt_match_table),

-- 
2.47.3

[PATCH v4 3/3] ARM: dts: ti/omap: omap4-epson-embt2ws: add powerbutton

[akemnade]

From: Andreas Kemnade <andreas@kemnade.info>

There is a power button connected to the PMIC, so describe it to be able
to power off the device in a convenient manner.

Signed-off-by: Andreas Kemnade <andreas@kemnade.info>
---
 arch/arm/boot/dts/ti/omap/omap4-epson-embt2ws.dts | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/arch/arm/boot/dts/ti/omap/omap4-epson-embt2ws.dts b/arch/arm/boot/dts/ti/omap/omap4-epson-embt2ws.dts
index c90f43cc2fae..673df1b693f2 100644
--- a/arch/arm/boot/dts/ti/omap/omap4-epson-embt2ws.dts
+++ b/arch/arm/boot/dts/ti/omap/omap4-epson-embt2ws.dts
@@ -229,6 +229,11 @@ rtc {
 			interrupts = <11>;
 		};
 
+		pwrbutton {
+			compatible = "ti,twl6030-pwrbutton";
+			interrupts = <0>;
+		};
+
 		ldo2: regulator-ldo2 {
 			compatible = "ti,twl6032-ldo2";
 			regulator-min-microvolt = <1000000>;

-- 
2.47.3

Re: [PATCH v4 1/3] dt-bindings: mfd: twl: enable power button also for twl603x

[Conor Dooley]

[-- Attachment #1: Type: text/plain, Size: 78 bytes --]

Reviewed-by: Conor Dooley <conor.dooley@microchip.com>
pw-bot: not-applicable

[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 228 bytes --]