[PATCH v3 0/4] input: MT6358 PMIC button support

[PATCH v3 0/4] input: MT6358 PMIC button support

[Mattijs Korpershoek]

The MediaTek MT6358 PMIC has support for two buttons: PWR and HOME.

The interrupt logic is a little different than other PMICs from the
same family:
for MT6323 and MT6397, we have one interrupt source per button
* for MT6358, we have two interrupts lines per button: the press and
* release interrupts are distinct sources.

Changes since original v2 at [1]:
* added 4th patch with device tree enable
* cover letter title prefixed with 'input'

This series depends on [2]

[1] https://lore.kernel.org/r/20210512152648.39961-1-mkorpershoek@baylibre.com
[2] https://lore.kernel.org/r/20210506094116.638527-1-mkorpershoek@baylibre.com

This has been tested with evtest on mt8183-pumpkin
using for-mfd-next as base tree.

Mattijs Korpershoek (4):
  Input: mtk-pmic-keys - use get_irq_byname() instead of index
  dt-bindings: input: mtk-pmic-keys: add MT6358 binding definition
  Input: mtk-pmic-keys - add support for MT6358
  arm64: dts: mt6358: add mt6358-keys node

 .../bindings/input/mtk-pmic-keys.txt          |  5 +-
 arch/arm64/boot/dts/mediatek/mt6358.dtsi      | 12 ++++
 drivers/input/keyboard/mtk-pmic-keys.c        | 56 +++++++++++++++++--
 3 files changed, 68 insertions(+), 5 deletions(-)


base-commit: 495fb48dbd9bcbe15859e086edd24519a6bd2961
-- 
2.27.0

[PATCH v3 1/4] Input: mtk-pmic-keys - use get_irq_byname() instead of index

[Mattijs Korpershoek]

Some pmics of the mt6397 family (such as MT6358), have two IRQs per
physical key: one for press event, another for release event.

The mtk-pmic-keys driver assumes that each key only has one
IRQ. The key index and the RES_IRQ resource index have a 1/1 mapping.

This won't work for MT6358, as we have multiple resources (2) for one key.

To prepare mtk-pmic-keys to support MT6358, retrieve IRQs by name
instead of by index.

Signed-off-by: Mattijs Korpershoek <mkorpershoek@baylibre.com>
---
 drivers/input/keyboard/mtk-pmic-keys.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/input/keyboard/mtk-pmic-keys.c b/drivers/input/keyboard/mtk-pmic-keys.c
index 62391d6c7da6..d1abf95d5701 100644
--- a/drivers/input/keyboard/mtk-pmic-keys.c
+++ b/drivers/input/keyboard/mtk-pmic-keys.c
@@ -241,6 +241,7 @@ static int mtk_pmic_keys_probe(struct platform_device *pdev)
 	unsigned int keycount;
 	struct mt6397_chip *pmic_chip = dev_get_drvdata(pdev->dev.parent);
 	struct device_node *node = pdev->dev.of_node, *child;
+	static const char *const irqnames[] = { "powerkey", "homekey" };
 	struct mtk_pmic_keys *keys;
 	const struct mtk_pmic_regs *mtk_pmic_regs;
 	struct input_dev *input_dev;
@@ -268,7 +269,8 @@ static int mtk_pmic_keys_probe(struct platform_device *pdev)
 	input_dev->id.version = 0x0001;
 
 	keycount = of_get_available_child_count(node);
-	if (keycount > MTK_PMIC_MAX_KEY_COUNT) {
+	if (keycount > MTK_PMIC_MAX_KEY_COUNT ||
+	    keycount > ARRAY_SIZE(irqnames)) {
 		dev_err(keys->dev, "too many keys defined (%d)\n", keycount);
 		return -EINVAL;
 	}
@@ -276,7 +278,8 @@ static int mtk_pmic_keys_probe(struct platform_device *pdev)
 	for_each_child_of_node(node, child) {
 		keys->keys[index].regs = &mtk_pmic_regs->keys_regs[index];
 
-		keys->keys[index].irq = platform_get_irq(pdev, index);
+		keys->keys[index].irq =
+			platform_get_irq_byname(pdev, irqnames[index]);
 		if (keys->keys[index].irq < 0) {
 			of_node_put(child);
 			return keys->keys[index].irq;
-- 
2.27.0

[PATCH v3 2/4] dt-bindings: input: mtk-pmic-keys: add MT6358 binding definition

[Mattijs Korpershoek]

Add the binding documentation of the mtk-pmic-keys for the MT6358 PMICs.

MT6358 is a little different since it used separate IRQs for the
release key (_r) event

Signed-off-by: Mattijs Korpershoek <mkorpershoek@baylibre.com>
Acked-by: Rob Herring <robh@kernel.org>
---
 Documentation/devicetree/bindings/input/mtk-pmic-keys.txt | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/input/mtk-pmic-keys.txt b/Documentation/devicetree/bindings/input/mtk-pmic-keys.txt
index 535d92885372..9d00f2a8e13a 100644
--- a/Documentation/devicetree/bindings/input/mtk-pmic-keys.txt
+++ b/Documentation/devicetree/bindings/input/mtk-pmic-keys.txt
@@ -9,7 +9,10 @@ For MT6397/MT6323 MFD bindings see:
 Documentation/devicetree/bindings/mfd/mt6397.txt
 
 Required properties:
-- compatible: "mediatek,mt6397-keys" or "mediatek,mt6323-keys"
+- compatible: Should be one of:
+	- "mediatek,mt6397-keys"
+	- "mediatek,mt6323-keys"
+	- "mediatek,mt6358-keys"
 - linux,keycodes: See Documentation/devicetree/bindings/input/input.yaml
 
 Optional Properties:
-- 
2.27.0

[PATCH v3 3/4] Input: mtk-pmic-keys - add support for MT6358

[Mattijs Korpershoek]

MT6358 pmic keys behave differently than mt6397 and mt6323: there are
two interrupts per key: one for press, the other one for release (_r)

Signed-off-by: Mattijs Korpershoek <mkorpershoek@baylibre.com>
---
 drivers/input/keyboard/mtk-pmic-keys.c | 49 ++++++++++++++++++++++++--
 1 file changed, 47 insertions(+), 2 deletions(-)

diff --git a/drivers/input/keyboard/mtk-pmic-keys.c b/drivers/input/keyboard/mtk-pmic-keys.c
index d1abf95d5701..5496a7020104 100644
--- a/drivers/input/keyboard/mtk-pmic-keys.c
+++ b/drivers/input/keyboard/mtk-pmic-keys.c
@@ -9,6 +9,7 @@
 #include <linux/interrupt.h>
 #include <linux/kernel.h>
 #include <linux/mfd/mt6323/registers.h>
+#include <linux/mfd/mt6358/registers.h>
 #include <linux/mfd/mt6397/core.h>
 #include <linux/mfd/mt6397/registers.h>
 #include <linux/module.h>
@@ -74,11 +75,22 @@ static const struct mtk_pmic_regs mt6323_regs = {
 	.pmic_rst_reg = MT6323_TOP_RST_MISC,
 };
 
+static const struct mtk_pmic_regs mt6358_regs = {
+	.keys_regs[MTK_PMIC_PWRKEY_INDEX] =
+		MTK_PMIC_KEYS_REGS(MT6358_TOPSTATUS,
+		0x2, MT6358_PSC_TOP_INT_CON0, 0x5),
+	.keys_regs[MTK_PMIC_HOMEKEY_INDEX] =
+		MTK_PMIC_KEYS_REGS(MT6358_TOPSTATUS,
+		0x8, MT6358_PSC_TOP_INT_CON0, 0xa),
+	.pmic_rst_reg = MT6358_TOP_RST_MISC,
+};
+
 struct mtk_pmic_keys_info {
 	struct mtk_pmic_keys *keys;
 	const struct mtk_pmic_keys_regs *regs;
 	unsigned int keycode;
 	int irq;
+	int irq_r; /* optional: release irq if different */
 	bool wakeup:1;
 };
 
@@ -188,6 +200,19 @@ static int mtk_pmic_key_setup(struct mtk_pmic_keys *keys,
 		return ret;
 	}
 
+	if (info->irq_r > 0) {
+		ret = devm_request_threaded_irq(
+			keys->dev, info->irq_r, NULL,
+			mtk_pmic_keys_irq_handler_thread,
+			IRQF_ONESHOT | IRQF_TRIGGER_HIGH, "mtk-pmic-keys",
+			info);
+		if (ret) {
+			dev_err(keys->dev, "Failed to request IRQ_r: %d: %d\n",
+				info->irq, ret);
+			return ret;
+		}
+	}
+
 	input_set_capability(keys->input_dev, EV_KEY, info->keycode);
 
 	return 0;
@@ -199,8 +224,11 @@ static int __maybe_unused mtk_pmic_keys_suspend(struct device *dev)
 	int index;
 
 	for (index = 0; index < MTK_PMIC_MAX_KEY_COUNT; index++) {
-		if (keys->keys[index].wakeup)
+		if (keys->keys[index].wakeup) {
 			enable_irq_wake(keys->keys[index].irq);
+			if (keys->keys[index].irq_r > 0)
+				enable_irq_wake(keys->keys[index].irq_r);
+		}
 	}
 
 	return 0;
@@ -212,8 +240,11 @@ static int __maybe_unused mtk_pmic_keys_resume(struct device *dev)
 	int index;
 
 	for (index = 0; index < MTK_PMIC_MAX_KEY_COUNT; index++) {
-		if (keys->keys[index].wakeup)
+		if (keys->keys[index].wakeup) {
 			disable_irq_wake(keys->keys[index].irq);
+			if (keys->keys[index].irq_r > 0)
+				disable_irq_wake(keys->keys[index].irq_r);
+		}
 	}
 
 	return 0;
@@ -229,6 +260,9 @@ static const struct of_device_id of_mtk_pmic_keys_match_tbl[] = {
 	}, {
 		.compatible = "mediatek,mt6323-keys",
 		.data = &mt6323_regs,
+	}, {
+		.compatible = "mediatek,mt6358-keys",
+		.data = &mt6358_regs,
 	}, {
 		/* sentinel */
 	}
@@ -242,6 +276,7 @@ static int mtk_pmic_keys_probe(struct platform_device *pdev)
 	struct mt6397_chip *pmic_chip = dev_get_drvdata(pdev->dev.parent);
 	struct device_node *node = pdev->dev.of_node, *child;
 	static const char *const irqnames[] = { "powerkey", "homekey" };
+	static const char *const irqnames_r[] = { "powerkey_r", "homekey_r" };
 	struct mtk_pmic_keys *keys;
 	const struct mtk_pmic_regs *mtk_pmic_regs;
 	struct input_dev *input_dev;
@@ -285,6 +320,16 @@ static int mtk_pmic_keys_probe(struct platform_device *pdev)
 			return keys->keys[index].irq;
 		}
 
+		if (of_device_is_compatible(node, "mediatek,mt6358-keys")) {
+			keys->keys[index].irq_r = platform_get_irq_byname(
+				pdev, irqnames_r[index]);
+
+			if (keys->keys[index].irq_r < 0) {
+				of_node_put(child);
+				return keys->keys[index].irq_r;
+			}
+		}
+
 		error = of_property_read_u32(child,
 			"linux,keycodes", &keys->keys[index].keycode);
 		if (error) {
-- 
2.27.0

[PATCH v3 4/4] arm64: dts: mt6358: add mt6358-keys node

[Mattijs Korpershoek]

This enables the power,home keys on MediaTek boards with a mt6358 pmic.

Signed-off-by: Mattijs Korpershoek <mkorpershoek@baylibre.com>
---
 arch/arm64/boot/dts/mediatek/mt6358.dtsi | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/arch/arm64/boot/dts/mediatek/mt6358.dtsi b/arch/arm64/boot/dts/mediatek/mt6358.dtsi
index fa159b20379e..a1b017a6a751 100644
--- a/arch/arm64/boot/dts/mediatek/mt6358.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt6358.dtsi
@@ -2,6 +2,7 @@
 /*
  * Copyright (c) 2020 MediaTek Inc.
  */
+#include <dt-bindings/input/input.h>
 
 &pwrap {
 	pmic: mt6358 {
@@ -356,5 +357,16 @@ mt6358_vsim2_reg: ldo_vsim2 {
 		mt6358rtc: mt6358rtc {
 			compatible = "mediatek,mt6358-rtc";
 		};
+
+		mt6358keys: mt6358keys {
+			compatible = "mediatek,mt6358-keys";
+			power {
+				linux,keycodes = <KEY_POWER>;
+				wakeup-source;
+			};
+			home {
+				linux,keycodes = <KEY_HOME>;
+			};
+		};
 	};
 };
-- 
2.27.0

Re: [PATCH v3 0/4] input: MT6358 PMIC button support

[Mattijs Korpershoek]

Dear maintainers,

Gentle ping for this series

Mattijs Korpershoek <mkorpershoek@baylibre.com> writes:

> The MediaTek MT6358 PMIC has support for two buttons: PWR and HOME.
>
> The interrupt logic is a little different than other PMICs from the
> same family:
> for MT6323 and MT6397, we have one interrupt source per button
> * for MT6358, we have two interrupts lines per button: the press and
> * release interrupts are distinct sources.
>
> Changes since original v2 at [1]:
> * added 4th patch with device tree enable
> * cover letter title prefixed with 'input'
>
> This series depends on [2]
>
> [1] https://lore.kernel.org/r/20210512152648.39961-1-mkorpershoek@baylibre.com
> [2] https://lore.kernel.org/r/20210506094116.638527-1-mkorpershoek@baylibre.com
The MFD dependency has been merged in linux-next.

>
> This has been tested with evtest on mt8183-pumpkin
> using for-mfd-next as base tree.
>
> Mattijs Korpershoek (4):
>   Input: mtk-pmic-keys - use get_irq_byname() instead of index
>   dt-bindings: input: mtk-pmic-keys: add MT6358 binding definition
>   Input: mtk-pmic-keys - add support for MT6358
>   arm64: dts: mt6358: add mt6358-keys node
>
>  .../bindings/input/mtk-pmic-keys.txt          |  5 +-
>  arch/arm64/boot/dts/mediatek/mt6358.dtsi      | 12 ++++
>  drivers/input/keyboard/mtk-pmic-keys.c        | 56 +++++++++++++++++--
>  3 files changed, 68 insertions(+), 5 deletions(-)
>
>
> base-commit: 495fb48dbd9bcbe15859e086edd24519a6bd2961
> -- 
> 2.27.0