lkml.org 
[lkml]   [2009]   [Mar]   [26]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[patch 3/5] xtensa: add mt9d131l demo head to s6105 platform
Date
The mt9d131 is behind a pca9543 which needs to be configured before
we can find the sensor. Our s6_pca9543_callback is called directly
from pca9543_probe, so we may not call i2c_new_device immediately.

If Rodolfo Giometti's multiplexed i2c bus code and pca954x driver
is accepted, most of this patch can be replaced by a simple
i2c_register_board_info call.

Signed-off-by: Daniel Glöckner <dg@emlix.com>
---
arch/xtensa/platforms/s6105/device.c | 35 ++++++++++++++++++++++++++++++++++
1 files changed, 35 insertions(+), 0 deletions(-)
diff --git a/arch/xtensa/platforms/s6105/device.c b/arch/xtensa/platforms/s6105/device.c
index 07fb329..ff047fc 100644
--- a/arch/xtensa/platforms/s6105/device.c
+++ b/arch/xtensa/platforms/s6105/device.c
@@ -207,9 +207,33 @@ static struct s6dp_link s6dp_links[] = {
.is_egress = 1,
.minor = 2,
},
+ {
+ .port_mask = 1 << 3,
+ .is_egress = 0,
+ .minor = 3,
+ },
{ }
};

+static void s6_attach_camera(struct work_struct *ws)
+{
+ struct i2c_board_info mt9d131_bi = {
+ I2C_BOARD_INFO("mt9d131", S6I2C_ADDR_MT9D131),
+ .platform_data = &s6dp_links[1]
+ };
+ i2c_new_device(i2c_get_adapter(0), &mt9d131_bi);
+}
+
+static DECLARE_WORK(s6_attach_camera_work, s6_attach_camera);
+
+static void s6_pca9543_callback(struct i2c_client *client,
+ int (set_switch)(struct i2c_client *, unsigned))
+{
+ set_switch(client, 3);
+ /* i2c_attach_client does not look reentrant */
+ schedule_work(&s6_attach_camera_work);
+}
+
static struct i2c_board_info __initdata s6_i2c_devices[] = {
{
I2C_BOARD_INFO("24c02", S6I2C_ADDR_AT24HC02B),
@@ -221,6 +245,10 @@ static struct i2c_board_info __initdata s6_i2c_devices[] = {
I2C_BOARD_INFO("saa7121", S6I2C_ADDR_SAA7121),
.platform_data = &s6dp_links[0],
},
+ {
+ I2C_BOARD_INFO("pca9543", S6I2C_ADDR_PCA9543),
+ .platform_data = &s6_pca9543_callback
+ },
};

static struct resource s6_isef_resource[] = {
@@ -453,6 +481,13 @@ static int __init device_init(void)
gpio_set_value(GPIO_BP_RESET, 1);
}

+ /* reset MT9D131 */
+ if (!gpio_request(GPIO_IMAGER_RESET, "imager_reset")) {
+ gpio_direction_output(GPIO_IMAGER_RESET, 0);
+ udelay(1);
+ gpio_set_value(GPIO_IMAGER_RESET, 1);
+ }
+
i2c_register_board_info(S6_I2C_BUS_NUM, s6_i2c_devices,
ARRAY_SIZE(s6_i2c_devices));
spi_register_board_info(s6_spi_devices, ARRAY_SIZE(s6_spi_devices));
--
1.6.2.107.ge47ee
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2009-03-26 15:53    [from the cache]
©2003-2014 Jasper Spaans. Advertise on this site