diff options
| author | Álvaro Fernández Rojas <noltari@gmail.com> | 2022-05-16 23:40:32 +0200 |
|---|---|---|
| committer | Álvaro Fernández Rojas <noltari@gmail.com> | 2022-05-17 15:11:22 +0200 |
| commit | 20ea6adbf199097c4f5f591ffee088340630dae4 (patch) | |
| tree | d6719d95e136611a1c25bbf7789652d6d402779d /target/linux/bcm27xx/patches-5.15/950-0364-media-i2c-ov9281-Read-chip-ID-via-2-reads.patch | |
| parent | bca05bd072180dc38ef740b37ded9572a6db1981 (diff) | |
| download | upstream-20ea6adbf199097c4f5f591ffee088340630dae4.tar.gz upstream-20ea6adbf199097c4f5f591ffee088340630dae4.tar.bz2 upstream-20ea6adbf199097c4f5f591ffee088340630dae4.zip | |
bcm27xx: add support for linux v5.15
Build system: x86_64
Build-tested: bcm2708, bcm2709, bcm2710, bcm2711
Run-tested: bcm2708/RPiB+, bcm2709/RPi3B, bcm2710/RPi3B, bcm2711/RPi4B
Signed-off-by: Marty Jones <mj8263788@gmail.com>
Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
Diffstat (limited to 'target/linux/bcm27xx/patches-5.15/950-0364-media-i2c-ov9281-Read-chip-ID-via-2-reads.patch')
| -rw-r--r-- | target/linux/bcm27xx/patches-5.15/950-0364-media-i2c-ov9281-Read-chip-ID-via-2-reads.patch | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/target/linux/bcm27xx/patches-5.15/950-0364-media-i2c-ov9281-Read-chip-ID-via-2-reads.patch b/target/linux/bcm27xx/patches-5.15/950-0364-media-i2c-ov9281-Read-chip-ID-via-2-reads.patch new file mode 100644 index 0000000000..2644c5659b --- /dev/null +++ b/target/linux/bcm27xx/patches-5.15/950-0364-media-i2c-ov9281-Read-chip-ID-via-2-reads.patch @@ -0,0 +1,42 @@ +From 18e32b190c3e58cba734073706d5ff0fcd7cbba3 Mon Sep 17 00:00:00 2001 +From: Dave Stevenson <dave.stevenson@raspberrypi.com> +Date: Mon, 6 Jul 2020 17:51:32 +0100 +Subject: [PATCH] media: i2c: ov9281: Read chip ID via 2 reads + +Vision Components have made an OV9281 module which blocks reading +back the majority of registers to comply with NDAs, and in doing +so doesn't allow auto-increment register reading as used when +reading the chip ID. + +Use two reads and manually combine the results. + +Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com> +--- + drivers/media/i2c/ov9281.c | 14 +++++++++----- + 1 file changed, 9 insertions(+), 5 deletions(-) + +--- a/drivers/media/i2c/ov9281.c ++++ b/drivers/media/i2c/ov9281.c +@@ -904,13 +904,17 @@ static int ov9281_check_sensor_id(struct + struct i2c_client *client) + { + struct device *dev = &ov9281->client->dev; +- u32 id = 0; ++ u32 id = 0, id_msb; + int ret; + +- ret = ov9281_read_reg(client, OV9281_REG_CHIP_ID, +- OV9281_REG_VALUE_16BIT, &id); +- if (id != CHIP_ID) { +- dev_err(dev, "Unexpected sensor id(%06x), ret(%d)\n", id, ret); ++ ret = ov9281_read_reg(client, OV9281_REG_CHIP_ID + 1, ++ OV9281_REG_VALUE_08BIT, &id); ++ if (!ret) ++ ret = ov9281_read_reg(client, OV9281_REG_CHIP_ID, ++ OV9281_REG_VALUE_08BIT, &id_msb); ++ id |= (id_msb << 8); ++ if (ret || id != CHIP_ID) { ++ dev_err(dev, "Unexpected sensor id(%04x), ret(%d)\n", id, ret); + return -ENODEV; + } + |