1 files changed, 0 insertions, 98 deletions
diff --git a/target/linux/bcm27xx/patches-4.19/950-0172-media-tc358743-Check-I2C-succeeded-during-probe.patch b/target/linux/bcm27xx/patches-4.19/950-0172-media-tc358743-Check-I2C-succeeded-during-probe.patch
deleted file mode 100644
index 6cb1134b9d..0000000000
--- a/target/linux/bcm27xx/patches-4.19/950-0172-media-tc358743-Check-I2C-succeeded-during-probe.patch
+++ /dev/null
@@ -1,98 +0,0 @@
-From 6e089b7c2526037b0eaf9ecaed4d38957f33c19c Mon Sep 17 00:00:00 2001
-From: Dave Stevenson <dave.stevenson@raspberrypi.org>
-Date: Wed, 31 Oct 2018 14:57:34 +0000
-Subject: [PATCH] media: tc358743: Check I2C succeeded during probe.
-
-The probe for the TC358743 reads the CHIPID register from
-the device and compares it to the expected value of 0.
-If the I2C request fails then that also returns 0, so
-the driver loads thinking that the device is there.
-
-Generally I2C communications are reliable so there is
-limited need to check the return value on every transfer,
-therefore only amend the one read during probe to check
-for I2C errors.
-
-Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org>
----
- drivers/media/i2c/tc358743.c | 27 +++++++++++++++++++++++----
- 1 file changed, 23 insertions(+), 4 deletions(-)
-
---- a/drivers/media/i2c/tc358743.c
-+++ b/drivers/media/i2c/tc358743.c
-@@ -110,7 +110,7 @@ static inline struct tc358743_state *to_
- 
- /* --------------- I2C --------------- */
- 
--static void i2c_rd(struct v4l2_subdev *sd, u16 reg, u8 *values, u32 n)
-+static int i2c_rd(struct v4l2_subdev *sd, u16 reg, u8 *values, u32 n)
- {
- 	struct tc358743_state *state = to_state(sd);
- 	struct i2c_client *client = state->i2c_client;
-@@ -136,6 +136,7 @@ static void i2c_rd(struct v4l2_subdev *s
- 		v4l2_err(sd, "%s: reading register 0x%x from 0x%x failed\n",
- 				__func__, reg, client->addr);
- 	}
-+	return err != ARRAY_SIZE(msgs);
- }
- 
- static void i2c_wr(struct v4l2_subdev *sd, u16 reg, u8 *values, u32 n)
-@@ -192,15 +193,24 @@ static void i2c_wr(struct v4l2_subdev *s
- 	}
- }
- 
--static noinline u32 i2c_rdreg(struct v4l2_subdev *sd, u16 reg, u32 n)
-+static noinline u32 i2c_rdreg_err(struct v4l2_subdev *sd, u16 reg, u32 n,
-+				  int *err)
- {
-+	int error;
- 	__le32 val = 0;
- 
--	i2c_rd(sd, reg, (u8 __force *)&val, n);
-+	error = i2c_rd(sd, reg, (u8 __force *)&val, n);
-+	if (err)
-+		*err = error;
- 
- 	return le32_to_cpu(val);
- }
- 
-+static inline u32 i2c_rdreg(struct v4l2_subdev *sd, u16 reg, u32 n)
-+{
-+	return i2c_rdreg_err(sd, reg, n, NULL);
-+}
-+
- static noinline void i2c_wrreg(struct v4l2_subdev *sd, u16 reg, u32 val, u32 n)
- {
- 	__le32 raw = cpu_to_le32(val);
-@@ -229,6 +239,13 @@ static u16 i2c_rd16(struct v4l2_subdev *
- 	return i2c_rdreg(sd, reg, 2);
- }
- 
-+static int i2c_rd16_err(struct v4l2_subdev *sd, u16 reg, u16 *value)
-+{
-+	int err;
-+	*value = i2c_rdreg_err(sd, reg, 2, &err);
-+	return err;
-+}
-+
- static void i2c_wr16(struct v4l2_subdev *sd, u16 reg, u16 val)
- {
- 	i2c_wrreg(sd, reg, val, 2);
-@@ -2054,6 +2071,7 @@ static int tc358743_probe(struct i2c_cli
- 	struct tc358743_platform_data *pdata = client->dev.platform_data;
- 	struct v4l2_subdev *sd;
- 	u16 irq_mask = MASK_HDMI_MSK | MASK_CSI_MSK;
-+	u16 chipid;
- 	int err;
- 
- 	if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
-@@ -2086,7 +2104,8 @@ static int tc358743_probe(struct i2c_cli
- 	sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE | V4L2_SUBDEV_FL_HAS_EVENTS;
- 
- 	/* i2c access */
--	if ((i2c_rd16(sd, CHIPID) & MASK_CHIPID) != 0) {
-+	if (i2c_rd16_err(sd, CHIPID, &chipid) ||
-+	    (chipid & MASK_CHIPID) != 0) {
- 		v4l2_info(sd, "not a TC358743 on address 0x%x\n",
- 			  client->addr << 1);
- 		return -ENODEV;