linux-kernel - [PATCH v2 1/1] Input: snvs_pwrkey

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Message-Id: <20250314094213.902-2-ian.ray@gehealthcare.com>
Date: Fri, 14 Mar 2025 11:42:13 +0200
From: Ian Ray <ian.ray@...ealthcare.com>
To: dmitry.torokhov@...il.com,
	robh@...nel.org,
	krzk+dt@...nel.org,
	conor+dt@...nel.org
Cc: ian.ray@...ealthcare.com,
	linux-input@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH v2 1/1] Input: snvs_pwrkey - support power-off-time-sec

The power-off time is configured in LPCR[17:16] BTN_PRESS_TIME:

 * b00:  5 seconds (SoC default)
 * b01: 10 seconds
 * b10: 15 seconds
 * b11: PMIC is not disabled

Signed-off-by: Ian Ray <ian.ray@...ealthcare.com>
---
 drivers/input/keyboard/snvs_pwrkey.c | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/drivers/input/keyboard/snvs_pwrkey.c b/drivers/input/keyboard/snvs_pwrkey.c
index f7b5f1e25c80..d7372ace694a 100644
--- a/drivers/input/keyboard/snvs_pwrkey.c
+++ b/drivers/input/keyboard/snvs_pwrkey.c
@@ -27,6 +27,8 @@
 #define SNVS_HPSR_BTN		BIT(6)
 #define SNVS_LPSR_SPO		BIT(18)
 #define SNVS_LPCR_DEP_EN	BIT(5)
+#define SNVS_LPCR_BPT_SHIFT	16
+#define SNVS_LPCR_BPT_MASK	(3 << SNVS_LPCR_BPT_SHIFT)
 
 #define DEBOUNCE_TIME		30
 #define REPEAT_INTERVAL		60
@@ -114,6 +116,8 @@ static int imx_snvs_pwrkey_probe(struct platform_device *pdev)
 	struct device_node *np;
 	struct clk *clk;
 	int error;
+	unsigned int val;
+	unsigned int bpt;
 	u32 vid;
 
 	/* Get SNVS register Page */
@@ -148,6 +152,24 @@ static int imx_snvs_pwrkey_probe(struct platform_device *pdev)
 	if (pdata->irq < 0)
 		return -EINVAL;
 
+	if (!of_property_read_u32(np, "power-off-time-sec", &val)) {
+		switch (val) {
+			case 0:
+				bpt = 0x3;
+				break;
+			case 5:
+			case 10:
+			case 15:
+				bpt = (val / 5) - 1;
+				break;
+			default:
+				dev_err(&pdev->dev, "power-off-time-sec %d out of range\n", val);
+				return -EINVAL;
+		}
+
+		regmap_update_bits(pdata->snvs, SNVS_LPCR_REG, SNVS_LPCR_BPT_MASK, bpt << SNVS_LPCR_BPT_SHIFT);
+	}
+
 	regmap_read(pdata->snvs, SNVS_HPVIDR1_REG, &vid);
 	pdata->minor_rev = vid & 0xff;
 
-- 
2.39.5