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From 3ef8db409fb567da880f15a08df5cea08f3f2a45 Mon Sep 17 00:00:00 2001
From: Vladimir Barinov <vladimir.barinov@cogentembedded.com>
Date: Wed, 18 Sep 2019 14:18:49 +0300
Subject: [PATCH] media: i2c: ov2311: fix otp id read
The OTP ID may fail if power rail comes early and imager
get into lpm mode.
Hence read otp id after full setup and stream enable
Signed-off-by: Vladimir Barinov <vladimir.barinov@cogentembedded.com>
---
drivers/media/i2c/soc_camera/ov2311.c | 7 ++-----
1 file changed, 2 insertions(+), 5 deletions(-)
diff --git a/drivers/media/i2c/soc_camera/ov2311.c b/drivers/media/i2c/soc_camera/ov2311.c
index f04f271..c61059d 100644
--- a/drivers/media/i2c/soc_camera/ov2311.c
+++ b/drivers/media/i2c/soc_camera/ov2311.c
@@ -376,7 +376,6 @@ static void ov2311_otp_id_read(struct i2c_client *client)
struct ov2311_priv *priv = to_ov2311(client);
int i;
- reg16_write(client, 0x100, 1);
reg16_write(client, 0x3d81, 1);
usleep_range(25000, 25500); /* wait 25 ms */
@@ -384,8 +383,6 @@ static void ov2311_otp_id_read(struct i2c_client *client)
/* first 6 bytes are equal on all ov2311 */
reg16_read(client, 0x7000 + i + 6, &priv->id[i]);
}
-
- reg16_write(client, 0x100, 0);
}
static ssize_t ov2311_otp_id_show(struct device *dev,
@@ -432,10 +429,10 @@ static int ov2311_initialize(struct i2c_client *client)
/* check revision */
reg16_read(client, OV2311_REV, &rev);
- /* Read OTP IDs */
- ov2311_otp_id_read(client);
/* Program wizard registers */
ov2311_set_regs(client, ov2311_regs_wizard_r1c, ARRAY_SIZE(ov2311_regs_wizard_r1c));
+ /* Read OTP IDs */
+ ov2311_otp_id_read(client);
dev_info(&client->dev, "ov2311 PID %x (rev %x), res %dx%d, OTP_ID %02x:%02x:%02x:%02x:%02x:%02x\n",
pid, rev, OV2311_MAX_WIDTH, OV2311_MAX_HEIGHT, priv->id[0], priv->id[1], priv->id[2], priv->id[3], priv->id[4], priv->id[5]);
--
2.7.4
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