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From 16082df9fc35be0488ddd3b4280187a9a361b511 Mon Sep 17 00:00:00 2001
From: Vladimir Barinov <vladimir.barinov@cogentembedded.com>
Date: Wed, 25 Mar 2020 14:29:31 +0300
Subject: [PATCH] media: i2c: ti9x4: increase i2c freq on master bus
This increase the serializer (remote) i2c frequency on master bus.
This speed up imager access since deafult timings are 100Khz
Signed-off-by: Vladimir Barinov <vladimir.barinov@cogentembedded.com>
---
drivers/media/i2c/soc_camera/ti9x4.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/drivers/media/i2c/soc_camera/ti9x4.c b/drivers/media/i2c/soc_camera/ti9x4.c
index 627612a..ca86f1fc 100644
--- a/drivers/media/i2c/soc_camera/ti9x4.c
+++ b/drivers/media/i2c/soc_camera/ti9x4.c
@@ -147,9 +147,6 @@ static void ti9x4_initial_setup(struct i2c_client *client)
/* Initial setup */
client->addr = priv->des_addr; /* TI9x4 I2C */
- reg8_write(client, 0x08, 0x1c); /* I2C glitch filter depth */
- reg8_write(client, 0x0a, 0x79); /* I2C high pulse width */
- reg8_write(client, 0x0b, 0x79); /* I2C low pulse width */
reg8_write(client, 0x0d, 0xb9); /* VDDIO 3.3V */
switch (priv->csi_rate) {
case 1600: /* REFCLK = 25MHZ */
@@ -340,6 +337,8 @@ static int ti9x4_initialize(struct i2c_client *client)
switch (priv->ser_id) {
case TI913_ID:
reg8_write(client, 0x0d, 0x55); /* Enable remote GPIO0/1 */
+ reg8_write(client, 0x11, 0x10); /* I2C high pulse width */
+ reg8_write(client, 0x12, 0x10); /* I2C low pulse width */
break;
case TI953_ID:
reg8_write(client, 0x0d, (priv->gpio[0] & 0x1) << 0 |
@@ -354,6 +353,8 @@ static int ti9x4_initialize(struct i2c_client *client)
(!!priv->gpio[1] << 5) |
(!!priv->gpio[2] << 6) |
(!!priv->gpio[3] << 7)); /* Enable serializer GPIOs only for output */
+ reg8_write(client, 0x0b, 0x10); /* I2C high pulse width */
+ reg8_write(client, 0x0c, 0x10); /* I2C low pulse width */
break;
}
client->addr = priv->des_addr;
--
2.7.4
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