Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit d75b1dcc authored by Sascha Hauer's avatar Sascha Hauer Committed by Mauro Carvalho Chehab
Browse files

V4L/DVB (11031): pcm990 baseboard: add camera bus width switch setting 



Some Phytec cameras have a I2C GPIO expander which allows it to
switch between different sensor bus widths. This was previously
handled in the camera driver. Since handling of this switch
varies on several boards the cameras are used on, the board
support seems a better place to handle the switch

Signed-off-by: default avatarSascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: default avatarGuennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@redhat.com>
parent 28f59339

arch/arm/mach-pxa/pcm990-baseboard.c

+45 −9
Original line number Diff line number Diff line
@@ -380,14 +380,50 @@ static struct pca953x_platform_data pca9536_data = { 
	.gpio_base	= NR_BUILTIN_GPIO + 1,

};



static struct soc_camera_link iclink[] = {

static int gpio_bus_switch;



static int pcm990_camera_set_bus_param(struct soc_camera_link *link,

		unsigned long flags)

{

	if (gpio_bus_switch <= 0) {

		if (flags == SOCAM_DATAWIDTH_10)

			return 0;

		else

			return -EINVAL;

	}



	if (flags & SOCAM_DATAWIDTH_8)

		gpio_set_value(gpio_bus_switch, 1);

	else

		gpio_set_value(gpio_bus_switch, 0);



	return 0;

}



static unsigned long pcm990_camera_query_bus_param(struct soc_camera_link *link)

{

	int ret;



	if (!gpio_bus_switch) {

		ret = gpio_request(NR_BUILTIN_GPIO + 1, "camera");

		if (!ret) {

			gpio_bus_switch = NR_BUILTIN_GPIO + 1;

			gpio_direction_output(gpio_bus_switch, 0);

		} else

			gpio_bus_switch = -EINVAL;

	}



	if (gpio_bus_switch > 0)

		return SOCAM_DATAWIDTH_8 | SOCAM_DATAWIDTH_10;

	else

		return SOCAM_DATAWIDTH_10;

}



static struct soc_camera_link iclink = {

	.bus_id	= 0, /* Must match with the camera ID above */

	.gpio = NR_BUILTIN_GPIO + 1,

	}, {

		.bus_id	= 0, /* Must match with the camera ID above */

		.gpio	= -ENXIO,

	}

	.query_bus_param = pcm990_camera_query_bus_param,

	.set_bus_param = pcm990_camera_set_bus_param,

};



/* Board I2C devices. */
@@ -398,10 +434,10 @@ static struct i2c_board_info __initdata pcm990_i2c_devices[] = { 
		.platform_data = &pca9536_data,

	}, {

		I2C_BOARD_INFO("mt9v022", 0x48),

		.platform_data = &iclink[0], /* With extender */

		.platform_data = &iclink, /* With extender */

	}, {

		I2C_BOARD_INFO("mt9m001", 0x5d),

		.platform_data = &iclink[0], /* With extender */

		.platform_data = &iclink, /* With extender */

	},

};

#endif /* CONFIG_VIDEO_PXA27x ||CONFIG_VIDEO_PXA27x_MODULE */