Input: mtk-pmic-keys - add support for MT6358

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 <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Dmitry Torokhov <[e-mail]>

drivers/input/keyboard/mtk-pmic-keys.c

···
 #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>
···
 	.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;
 };
 
···
 		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;
···
 	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;
···
 	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;
···
 		.compatible = "mediatek,mt6323-keys",
 		.data = &mt6323_regs,
 	}, {
+		.compatible = "mediatek,mt6358-keys",
+		.data = &mt6358_regs,
+	}, {
 		/* sentinel */
 	}
 };
···
 	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;
···
 		if (keys->keys[index].irq < 0) {
 			of_node_put(child);
 			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,