[Gta04-owner] [PATCH 1/2] video: td028ttec1: Add possibility to pass spi gpio via platform data.

Dr. H. Nikolaus Schaller hns at goldelico.com
Thu Jul 18 11:21:20 CEST 2013


Am 17.07.2013 um 23:24 schrieb Marek Belisko:

> Fixing issue 186: http://projects.goldelico.com/p/gta04-kernel/issues/186/
> 
> Signed-off-by: Marek Belisko <marek.belisko at open-nandra.com>
> ---
> 
> Compile tested only as my gta04 battery is gone :(.

Yes, it applies fine and compiles fine - but it appears that the kernel hangs immediately after uncompressing. Which is a little strange since DSS initialization is done quite late.

There will be a new battery for you soon :)

> 
> .../video/omap2/displays/panel-tpo-td028ttec1.c    | 67 +++++++++++++---------
> include/video/omap-panel-tpo-td028ttec1.h          | 11 ++++
> 2 files changed, 50 insertions(+), 28 deletions(-)
> create mode 100644 include/video/omap-panel-tpo-td028ttec1.h
> 
> diff --git a/drivers/video/omap2/displays/panel-tpo-td028ttec1.c b/drivers/video/omap2/displays/panel-tpo-td028ttec1.c
> index 48cc10b..99ffac1 100644
> --- a/drivers/video/omap2/displays/panel-tpo-td028ttec1.c
> +++ b/drivers/video/omap2/displays/panel-tpo-td028ttec1.c
> @@ -29,6 +29,7 @@
> 
> //#include <plat/display.h>
> #include <video/omapdss.h>
> +#include <video/omap-panel-tpo-td028ttec1.h>
> #include <linux/gpio.h>
> 
> static struct omap_video_timings td028ttec1_panel_timings = {
> @@ -54,6 +55,10 @@ struct jbt_info {
> 	u_int16_t tx_buf[4];
> 	struct spi_device *spi_dev;
> 	int state;
> +	int gpio_cs;
> +	int gpio_scl;
> +	int gpio_din;
> +	int gpio_dout;
> };
> 
> static struct jbt_info _jbt, *jbt = &_jbt;
> @@ -61,16 +66,10 @@ static struct jbt_info _jbt, *jbt = &_jbt;
> #define JBT_COMMAND	0x000
> #define JBT_DATA	0x100
> 
> -// FIXME: this should be passed from the board initialization structure or should be set by driver parameters
> -#define GPIO_CS		(machine_is_gta04()?19:161)
> -#define GPIO_SCL	(machine_is_gta04()?12:162)
> -#define GPIO_DIN	(machine_is_gta04()?18:159)
> -#define GPIO_DOUT	(machine_is_gta04()?20:158)
> -
> -#define SPI_READ()      (gpio_get_value(GPIO_DIN))
> -#define SPI_CS(bit) 	(gpio_set_value(GPIO_CS, bit))
> -#define SPI_SDA(bit)    (gpio_set_value(GPIO_DOUT, bit))
> -#define SPI_SCL(bit)    (gpio_set_value(GPIO_SCL, bit))
> +#define SPI_READ()      (gpio_get_value(jbt->gpio_din))
> +#define SPI_CS(bit) 	(gpio_set_value(jbt->gpio_cs, bit))
> +#define SPI_SDA(bit)    (gpio_set_value(jbt->gpio_dout, bit))
> +#define SPI_SCL(bit)    (gpio_set_value(jbt->gpio_scl, bit))
> 
> /* 150uS minimum clock cycle, we have two of this plus our other
>  * instructions */
> @@ -152,33 +151,33 @@ int jbt_reg_write16(struct jbt_info *jbt, u_int8_t reg, u_int16_t data)
> 	return rc;
> }
> 
> -int jbt_reg_init(void)
> +static int jbt_reg_init(struct jbt_info *jbt)
> {
> 	int r;
> 	
> 	printk("jbt_reg_init()\n");
> 	
> -	SPI_CS(1);	// unselect
> -	SPI_SCL(1);	// inactive
> -	SPI_SDA(0);	// default
> -	
> -	r = gpio_request(GPIO_CS, "TD028_CS");
> +	r = gpio_request(jbt->gpio_cs, "TD028_CS");
> 	if(r < 0)
> -		printk(KERN_ERR "Unable to get TD028_CS GPIO %d\n", GPIO_CS);
> -	r = gpio_request(GPIO_SCL, "TD028_SCL");
> +		printk(KERN_ERR "Unable to get TD028_CS GPIO %d\n", jbt->gpio_cs);
> +	r = gpio_request(jbt->gpio_scl, "TD028_SCL");
> 	if(r < 0)
> -		printk(KERN_ERR "Unable to get TD028_SCL GPIO %d\n", GPIO_SCL);
> -	r = gpio_request(GPIO_DOUT, "TD028_DOUT");
> +		printk(KERN_ERR "Unable to get TD028_SCL GPIO %d\n", jbt->gpio_scl);
> +	r = gpio_request(jbt->gpio_dout, "TD028_DOUT");
> 	if(r < 0)
> -		printk(KERN_ERR "Unable to get TD028_DOUT GPIO %d\n", GPIO_DOUT);
> -	r = gpio_request(GPIO_DIN, "TD028_DIN");
> +		printk(KERN_ERR "Unable to get TD028_DOUT GPIO %d\n", jbt->gpio_dout);
> +	r = gpio_request(jbt->gpio_din, "TD028_DIN");
> 	if(r < 0)
> -		printk(KERN_ERR "Unable to get TD028_DIN GPIO %d\n", GPIO_DIN);
> +		printk(KERN_ERR "Unable to get TD028_DIN GPIO %d\n", jbt->gpio_din);
> 
> -	gpio_direction_output(GPIO_CS, true);
> -	gpio_direction_output(GPIO_SCL, true);
> -	gpio_direction_output(GPIO_DOUT, true);
> -	gpio_direction_input(GPIO_DIN);
> +	gpio_direction_output(jbt->gpio_cs, true);
> +	gpio_direction_output(jbt->gpio_scl, true);
> +	gpio_direction_output(jbt->gpio_dout, true);
> +	gpio_direction_input(jbt->gpio_din);
> +
> +	SPI_CS(1);	// unselect
> +	SPI_SCL(1);	// inactive
> +	SPI_SDA(0);	// default
> 
> 	/* according to data sheet: wait 50ms (Tpos of LCM). However, 50ms
> 	 * seems unreliable with later LCM batches, increasing to 90ms */
> @@ -261,15 +260,27 @@ enum jbt_register {
> 	
> };
> 
> +static struct panel_td028ttec1_data
> +*get_panel_data(struct omap_dss_device *dssdev)
> +{
> +	return (struct panel_td028ttec1_data *) dssdev->data;
> +}
> +
> static int td028ttec1_panel_probe(struct omap_dss_device *dssdev)
> {
> +	struct panel_td028ttec1_data *panel_data = get_panel_data(dssdev);
> 	int rc;
> 	
> 	printk("td028ttec1_panel_probe()\n");
> 	dssdev->panel.acb = 0x28;
> 	dssdev->panel.timings = td028ttec1_panel_timings;
> 	
> -	rc = jbt_reg_init();
> +	jbt->gpio_cs = panel_data->gpio_cs;
> +	jbt->gpio_scl = panel_data->gpio_scl;
> +	jbt->gpio_din = panel_data->gpio_din;
> +	jbt->gpio_dout = panel_data->gpio_dout;
> +
> +	rc = jbt_reg_init(jbt);
> 	
> 	return 0;
> 	return rc ? -ENODEV : 0;
> diff --git a/include/video/omap-panel-tpo-td028ttec1.h b/include/video/omap-panel-tpo-td028ttec1.h
> new file mode 100644
> index 0000000..f10cc12
> --- /dev/null
> +++ b/include/video/omap-panel-tpo-td028ttec1.h
> @@ -0,0 +1,11 @@
> +#ifndef __OMAP_PANEL_TD028TTEC1_H
> +#define __OMAP_PANEL_TD028TTEC1_H
> +
> +struct panel_td028ttec1_data {
> +	int gpio_cs;
> +	int gpio_scl;
> +	int gpio_din;
> +	int gpio_dout;	
> +};
> +
> +#endif /* __OMAP_PANEL_TD028TTEC1_H  */
> -- 
> 1.8.1.2
> 
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