forked from Openwrt/openwrt
8c405cdccc
The patches were generated from the RPi repo with the following command: git format-patch v6.6.34..rpi-6.1.y Some patches needed rebasing and, as usual, the applied and reverted, wireless drivers, Github workflows, READMEs and defconfigs patches were removed. Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
66 lines
1.8 KiB
Diff
66 lines
1.8 KiB
Diff
From 5ce57ee145cefab84ccd31977af2ecc163e9f573 Mon Sep 17 00:00:00 2001
|
|
From: Markus Proeller <markus.proeller@pieye.org>
|
|
Date: Tue, 16 Jun 2020 13:24:31 +0200
|
|
Subject: [PATCH 0216/1085] media: irs1125: Using i2c_transfer for ic2 reads
|
|
|
|
Reading data over i2c is done by using i2c_transfer to ensure that this
|
|
operation can't be interrupted.
|
|
|
|
Signed-off-by: Markus Proeller <markus.proeller@pieye.org>
|
|
---
|
|
drivers/media/i2c/irs1125.c | 37 ++++++++++++++++++++++---------------
|
|
1 file changed, 22 insertions(+), 15 deletions(-)
|
|
|
|
--- a/drivers/media/i2c/irs1125.c
|
|
+++ b/drivers/media/i2c/irs1125.c
|
|
@@ -248,27 +248,34 @@ static int irs1125_write(struct v4l2_sub
|
|
|
|
static int irs1125_read(struct v4l2_subdev *sd, u16 reg, u16 *val)
|
|
{
|
|
- int ret;
|
|
- unsigned char data_w[2] = { reg >> 8, reg & 0xff };
|
|
- char rdval[2];
|
|
-
|
|
struct i2c_client *client = v4l2_get_subdevdata(sd);
|
|
+ struct i2c_msg msgs[2];
|
|
+ u8 addr_buf[2] = { reg >> 8, reg & 0xff };
|
|
+ u8 data_buf[2] = { 0, };
|
|
+ int ret;
|
|
|
|
- ret = i2c_master_send(client, data_w, 2);
|
|
- if (ret < 0) {
|
|
- dev_dbg(&client->dev, "%s: i2c write error, reg: %x\n",
|
|
- __func__, reg);
|
|
+ /* Write register address */
|
|
+ msgs[0].addr = client->addr;
|
|
+ msgs[0].flags = 0;
|
|
+ msgs[0].len = ARRAY_SIZE(addr_buf);
|
|
+ msgs[0].buf = addr_buf;
|
|
+
|
|
+ /* Read data from register */
|
|
+ msgs[1].addr = client->addr;
|
|
+ msgs[1].flags = I2C_M_RD;
|
|
+ msgs[1].len = 2;
|
|
+ msgs[1].buf = data_buf;
|
|
+
|
|
+ ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
|
|
+ if (ret != ARRAY_SIZE(msgs)) {
|
|
+ if (ret >= 0)
|
|
+ ret = -EIO;
|
|
return ret;
|
|
}
|
|
|
|
- ret = i2c_master_recv(client, rdval, 2);
|
|
- if (ret < 0)
|
|
- dev_err(&client->dev, "%s: i2c read error, reg: %x\n",
|
|
- __func__, reg);
|
|
-
|
|
- *val = rdval[1] | (rdval[0] << 8);
|
|
+ *val = data_buf[1] | (data_buf[0] << 8);
|
|
|
|
- return ret;
|
|
+ return 0;
|
|
}
|
|
|
|
static int irs1125_write_array(struct v4l2_subdev *sd,
|