mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-22 23:12:32 +00:00
20ea6adbf1
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>
99 lines
2.9 KiB
Diff
99 lines
2.9 KiB
Diff
From d67eece3a8ba9e8961e6050129f6f76d31924d62 Mon Sep 17 00:00:00 2001
|
|
From: Daniel Scally <djrscally@gmail.com>
|
|
Date: Tue, 15 Feb 2022 23:07:34 +0000
|
|
Subject: [PATCH] media: i2c: Add ov7251_detect_chip()
|
|
|
|
.probe() is quite busy for this driver; make it cleaner by moving the
|
|
chip verification to a dedicated function.
|
|
|
|
Signed-off-by: Daniel Scally <djrscally@gmail.com>
|
|
---
|
|
drivers/media/i2c/ov7251.c | 62 +++++++++++++++++++++-----------------
|
|
1 file changed, 35 insertions(+), 27 deletions(-)
|
|
|
|
--- a/drivers/media/i2c/ov7251.c
|
|
+++ b/drivers/media/i2c/ov7251.c
|
|
@@ -1442,12 +1442,44 @@ out_free_bus_cfg:
|
|
return ret;
|
|
}
|
|
|
|
+static int ov7251_detect_chip(struct ov7251 *ov7251)
|
|
+{
|
|
+ u8 chip_id_high, chip_id_low, chip_rev;
|
|
+ int ret;
|
|
+
|
|
+ ret = ov7251_read_reg(ov7251, OV7251_CHIP_ID_HIGH, &chip_id_high);
|
|
+ if (ret < 0 || chip_id_high != OV7251_CHIP_ID_HIGH_BYTE)
|
|
+ return dev_err_probe(ov7251->dev, -ENODEV,
|
|
+ "could not read ID high\n");
|
|
+
|
|
+ ret = ov7251_read_reg(ov7251, OV7251_CHIP_ID_LOW, &chip_id_low);
|
|
+ if (ret < 0 || chip_id_low != OV7251_CHIP_ID_LOW_BYTE)
|
|
+ return dev_err_probe(ov7251->dev, -ENODEV,
|
|
+ "could not read ID low\n");
|
|
+
|
|
+ ret = ov7251_read_reg(ov7251, OV7251_SC_GP_IO_IN1, &chip_rev);
|
|
+ if (ret < 0)
|
|
+ return dev_err_probe(ov7251->dev, -ENODEV,
|
|
+ "could not read revision\n");
|
|
+ chip_rev >>= 4;
|
|
+
|
|
+ dev_info(ov7251->dev,
|
|
+ "OV7251 revision %x (%s) detected at address 0x%02x\n",
|
|
+ chip_rev,
|
|
+ chip_rev == 0x4 ? "1A / 1B" :
|
|
+ chip_rev == 0x5 ? "1C / 1D" :
|
|
+ chip_rev == 0x6 ? "1E" :
|
|
+ chip_rev == 0x7 ? "1F" : "unknown",
|
|
+ ov7251->i2c_client->addr);
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+
|
|
static int ov7251_probe(struct i2c_client *client)
|
|
{
|
|
struct v4l2_fwnode_device_properties props;
|
|
struct device *dev = &client->dev;
|
|
struct ov7251 *ov7251;
|
|
- u8 chip_id_high, chip_id_low, chip_rev;
|
|
unsigned int rate = 0;
|
|
int ret;
|
|
int i;
|
|
@@ -1589,34 +1621,10 @@ static int ov7251_probe(struct i2c_clien
|
|
goto free_entity;
|
|
}
|
|
|
|
- ret = ov7251_read_reg(ov7251, OV7251_CHIP_ID_HIGH, &chip_id_high);
|
|
- if (ret < 0 || chip_id_high != OV7251_CHIP_ID_HIGH_BYTE) {
|
|
- dev_err(dev, "could not read ID high\n");
|
|
- ret = -ENODEV;
|
|
- goto power_down;
|
|
- }
|
|
- ret = ov7251_read_reg(ov7251, OV7251_CHIP_ID_LOW, &chip_id_low);
|
|
- if (ret < 0 || chip_id_low != OV7251_CHIP_ID_LOW_BYTE) {
|
|
- dev_err(dev, "could not read ID low\n");
|
|
- ret = -ENODEV;
|
|
- goto power_down;
|
|
- }
|
|
-
|
|
- ret = ov7251_read_reg(ov7251, OV7251_SC_GP_IO_IN1, &chip_rev);
|
|
- if (ret < 0) {
|
|
- dev_err(dev, "could not read revision\n");
|
|
- ret = -ENODEV;
|
|
+ ret = ov7251_detect_chip(ov7251);
|
|
+ if (ret)
|
|
goto power_down;
|
|
- }
|
|
- chip_rev >>= 4;
|
|
|
|
- dev_info(dev, "OV7251 revision %x (%s) detected at address 0x%02x\n",
|
|
- chip_rev,
|
|
- chip_rev == 0x4 ? "1A / 1B" :
|
|
- chip_rev == 0x5 ? "1C / 1D" :
|
|
- chip_rev == 0x6 ? "1E" :
|
|
- chip_rev == 0x7 ? "1F" : "unknown",
|
|
- client->addr);
|
|
|
|
ret = ov7251_read_reg(ov7251, OV7251_PRE_ISP_00,
|
|
&ov7251->pre_isp_00);
|