linux-kernel - [PATCH v2 2/4] media: i2c: dw9719: Add DW9800K support

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Message-Id: <20251009-dw9800-driver-v2-2-3c33ccd1d741@fairphone.com>
Date: Thu, 09 Oct 2025 16:35:08 +0200
From: Griffin Kroah-Hartman <griffin.kroah@...rphone.com>
To: Mauro Carvalho Chehab <mchehab@...nel.org>, 
 Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, devicetree@...r.kernel.org, 
 Daniel Scally <djrscally@...il.com>, 
 Sakari Ailus <sakari.ailus@...ux.intel.com>, 
 Bjorn Andersson <andersson@...nel.org>, 
 Konrad Dybcio <konradybcio@...nel.org>, 
 André Apitzsch <git@...tzsch.eu>, 
 Luca Weiss <luca.weiss@...rphone.com>
Cc: linux-media@...r.kernel.org, linux-kernel@...r.kernel.org, 
 linux-arm-msm@...r.kernel.org, 
 Griffin Kroah-Hartman <griffin.kroah@...rphone.com>
Subject: [PATCH v2 2/4] media: i2c: dw9719: Add DW9800K support

The DW9800K is a similar part to the DW9719. The method for operation is
the same as the DW9719, but the register set is different. Add support
for this part to the existing dw9719 driver.

Tested on the Fairphone 5 smartphone.

Tested-by: Luca Weiss <luca.weiss@...rphone.com>
Signed-off-by: Griffin Kroah-Hartman <griffin.kroah@...rphone.com>
---
 drivers/media/i2c/dw9719.c | 20 ++++++++++++++++++--
 1 file changed, 18 insertions(+), 2 deletions(-)

diff --git a/drivers/media/i2c/dw9719.c b/drivers/media/i2c/dw9719.c
index 3627e78b8b6668933c4ecd92231465ce4105ff0c..fad716ece5ddcdc450669851b4b2685691b681bb 100644
--- a/drivers/media/i2c/dw9719.c
+++ b/drivers/media/i2c/dw9719.c
@@ -68,6 +68,9 @@
 #define DW9761_VCM_PRELOAD		CCI_REG8(8)
 #define DW9761_DEFAULT_VCM_PRELOAD	0x73
 
+#define DW9800K_DEFAULT_SAC		1
+#define DW9800K_MODE_SAC_SHIFT		6
+#define DW9800K_DEFAULT_VCM_FREQ		0x10
 
 #define to_dw9719_device(x) container_of(x, struct dw9719_device, sd)
 
@@ -75,6 +78,7 @@ enum dw9719_model {
 	DW9718S,
 	DW9719,
 	DW9761,
+	DW9800K,
 };
 
 struct dw9719_device {
@@ -130,11 +134,16 @@ static int dw9719_power_up(struct dw9719_device *dw9719, bool detect)
 	cci_write(dw9719->regmap, reg_pwr, DW9719_STANDBY, &ret);
 
 	if (detect) {
-		/* This model does not have an INFO register */
-		if (dw9719->model == DW9718S) {
+		/* These models do not have an INFO register */
+		switch (dw9719->model) {
+		case DW9718S:
 			dw9719->sac_mode = DW9718S_DEFAULT_SAC;
 			dw9719->vcm_freq = DW9718S_DEFAULT_VCM_FREQ;
 			goto props;
+		case DW9800K:
+			dw9719->sac_mode = DW9800K_DEFAULT_SAC;
+			dw9719->vcm_freq = DW9800K_DEFAULT_VCM_FREQ;
+			goto props;
 		}
 
 		ret = cci_read(dw9719->regmap, DW9719_INFO, &val, NULL);
@@ -177,6 +186,12 @@ static int dw9719_power_up(struct dw9719_device *dw9719, bool detect)
 	}
 
 	switch (dw9719->model) {
+	case DW9800K:
+		cci_write(dw9719->regmap, DW9719_CONTROL, DW9719_ENABLE_RINGING, &ret);
+		cci_write(dw9719->regmap, DW9719_MODE,
+			  dw9719->sac_mode << DW9800K_MODE_SAC_SHIFT, &ret);
+		cci_write(dw9719->regmap, DW9719_VCM_FREQ, dw9719->vcm_freq, &ret);
+		break;
 	case DW9718S:
 		/* Datasheet says [OCP/UVLO] should be disabled below 2.5V */
 		dw9719->sac_mode &= DW9718S_CONTROL_SAC_MASK;
@@ -426,6 +441,7 @@ static const struct of_device_id dw9719_of_table[] = {
 	{ .compatible = "dongwoon,dw9718s", .data = (const void *)DW9718S },
 	{ .compatible = "dongwoon,dw9719", .data = (const void *)DW9719 },
 	{ .compatible = "dongwoon,dw9761", .data = (const void *)DW9761 },
+	{ .compatible = "dongwoon,dw9800k", .data = (const void *)DW9800K },
 	{ }
 };
 MODULE_DEVICE_TABLE(of, dw9719_of_table);

-- 
2.43.0