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From 602dbaa9bc1794fe50d522dbef5a2ffde9eea202 Mon Sep 17 00:00:00 2001
From: Vladimir Barinov <vladimir.barinov@cogentembedded.com>
Date: Wed, 25 Dec 2019 17:02:13 +0300
Subject: [PATCH] media: i2c: imx390: fix refclk
The rflck for IMX390 must be ether 24MHz or 27Mhz
The deserializer on Cogent ECU provides 23Mhz, hence use
serizlizer PLL to adjust refclk to 24MHz
Signed-off-by: Vladimir Barinov <vladimir.barinov@cogentembedded.com>
---
drivers/media/i2c/soc_camera/imx390.c | 15 ++++++++-------
1 file changed, 8 insertions(+), 7 deletions(-)
diff --git a/drivers/media/i2c/soc_camera/imx390.c b/drivers/media/i2c/soc_camera/imx390.c
index b1df1ba..c1e5680 100644
--- a/drivers/media/i2c/soc_camera/imx390.c
+++ b/drivers/media/i2c/soc_camera/imx390.c
@@ -428,17 +428,18 @@ static int imx390_initialize(struct i2c_client *client)
goto err;
}
-#if 0
- /* setup XCLK */
tmp_addr = client->addr;
if (priv->ti9x4_addr) {
- /* CLK_OUT=22.5792*160*M/N/CLKDIV -> CLK_OUT=25MHz: CLKDIV=4, M=7, N=253: 22.5792*160/4*7/253=24.989MHz=CLK_OUT */
- client->addr = priv->ti9x3_addr; /* Serializer I2C address */
- reg8_write(client, 0x06, 0x47); /* Set CLKDIV and M */
- reg8_write(client, 0x07, 0xfd); /* Set N */
+ /* Setup XCLK:
+ CLK_OUT=23MHz*160*M/N/CLKDIV
+ CLK_OUT=24MHz (desired), CLKDIV=4, M=6, N=230
+ 23*160/4*6/230 = 24MHz = CLK_OUT
+ */
+ client->addr = priv->ti9x3_addr;
+ reg8_write(client, 0x06, 0x46); /* Set CLKDIV and M */
+ reg8_write(client, 0x07, 0xe6); /* Set N */
}
client->addr = tmp_addr;
-#endif
/* Read OTP IDs */
imx390_otp_id_read(client);
--
2.7.4
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