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author | Álvaro Fernández Rojas <noltari@gmail.com> | 2019-12-23 13:42:55 +0100 |
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committer | Álvaro Fernández Rojas <noltari@gmail.com> | 2019-12-24 18:49:44 +0100 |
commit | 67dcc43f3a22dc3a7ac07a7065971b426feeb043 (patch) | |
tree | 0b647356dce45d2c79fd46cf201daa5089cc0934 /target/linux/brcm2708/patches-4.19/950-0193-media-tc358743-Check-I2C-succeeded-during-probe.patch | |
parent | 47a93a810f78adce5a130d287f82b28e9b54313c (diff) | |
download | upstream-67dcc43f3a22dc3a7ac07a7065971b426feeb043.tar.gz upstream-67dcc43f3a22dc3a7ac07a7065971b426feeb043.tar.bz2 upstream-67dcc43f3a22dc3a7ac07a7065971b426feeb043.zip |
brcm2708: organize kernel patches
Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
Diffstat (limited to 'target/linux/brcm2708/patches-4.19/950-0193-media-tc358743-Check-I2C-succeeded-during-probe.patch')
-rw-r--r-- | target/linux/brcm2708/patches-4.19/950-0193-media-tc358743-Check-I2C-succeeded-during-probe.patch | 98 |
1 files changed, 0 insertions, 98 deletions
diff --git a/target/linux/brcm2708/patches-4.19/950-0193-media-tc358743-Check-I2C-succeeded-during-probe.patch b/target/linux/brcm2708/patches-4.19/950-0193-media-tc358743-Check-I2C-succeeded-during-probe.patch deleted file mode 100644 index 4df51feb64..0000000000 --- a/target/linux/brcm2708/patches-4.19/950-0193-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 193/806] 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; |