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Commit c0f7edb3 authored by Guennadi Liakhovetski's avatar Guennadi Liakhovetski Committed by Russell King
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[ARM] 5094/1: pcm990: Add framebuffer and backlight support 



PCM990 boards can be assembled with either a Sharp STN or a NEC TFT LCD. This
patch adds support for these displays and for the backlight, using the pwm_bl
driver.

Signed-off-by: default avatarGuennadi Liakhovetski <g.liakhovetski@pengutronix.de>
Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
parent 85847a36

arch/arm/mach-pxa/Kconfig

+16 −0
Original line number Diff line number Diff line
@@ -149,6 +149,22 @@ choice 


config MACH_PCM990_BASEBOARD

	bool "PHYTEC PCM-990 development board"

	select HAVE_PWM



endchoice



choice

	prompt "display on pcm990"

	depends on MACH_PCM990_BASEBOARD



config PCM990_DISPLAY_SHARP

	bool "sharp lq084v1dg21 stn display"



config PCM990_DISPLAY_NEC

	bool "nec nl6448bc20_18d tft display"



config PCM990_DISPLAY_NONE

	bool "no display"



endchoice

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

+98 −1
Original line number Diff line number Diff line
@@ -24,6 +24,7 @@ 
#include <linux/platform_device.h>

#include <linux/ide.h>

#include <linux/i2c.h>

#include <linux/pwm_backlight.h>



#include <media/soc_camera.h>
@@ -36,9 +37,99 @@ 
#include <asm/arch/mmc.h>

#include <asm/arch/ohci.h>

#include <asm/arch/pcm990_baseboard.h>

#include <asm/arch/pxafb.h>



#include "devices.h"



/*

 * The PCM-990 development baseboard uses PCM-027's hardeware in the

 * pcm990_lcd_power - control power supply to the LCD

 * @on: 0 = switch off, 1 = switch on

 *

 * Called by the pxafb driver

 */

#ifndef CONFIG_PCM990_DISPLAY_NONE

static void pcm990_lcd_power(int on, struct fb_var_screeninfo *var)

{

	if (on) {

		/* enable LCD-Latches

		 * power on LCD

		 */

		__PCM990_CTRL_REG(PCM990_CTRL_PHYS + PCM990_CTRL_REG3) =

			PCM990_CTRL_LCDPWR + PCM990_CTRL_LCDON;

	} else {

		/* disable LCD-Latches

		 * power off LCD

		 */

		__PCM990_CTRL_REG(PCM990_CTRL_PHYS + PCM990_CTRL_REG3) = 0x00;

	}

}

#endif



#if defined(CONFIG_PCM990_DISPLAY_SHARP)

static struct pxafb_mode_info fb_info_sharp_lq084v1dg21 = {

	.pixclock		= 28000,

	.xres			= 640,

	.yres			= 480,

	.bpp			= 16,

	.hsync_len		= 20,

	.left_margin		= 103,

	.right_margin		= 47,

	.vsync_len		= 6,

	.upper_margin		= 28,

	.lower_margin		= 5,

	.sync			= 0,

	.cmap_greyscale		= 0,

};



static struct pxafb_mach_info pcm990_fbinfo __initdata = {

	.modes			= &fb_info_sharp_lq084v1dg21,

	.num_modes		= 1,

	.lccr0			= LCCR0_PAS,

	.lccr3			= LCCR3_PCP,

	.pxafb_lcd_power	= pcm990_lcd_power,

};

#elif defined(CONFIG_PCM990_DISPLAY_NEC)

struct pxafb_mode_info fb_info_nec_nl6448bc20_18d = {

	.pixclock		= 39720,

	.xres			= 640,

	.yres			= 480,

	.bpp			= 16,

	.hsync_len		= 32,

	.left_margin		= 16,

	.right_margin		= 48,

	.vsync_len		= 2,

	.upper_margin		= 12,

	.lower_margin		= 17,

	.sync			= 0,

	.cmap_greyscale		= 0,

};



static struct pxafb_mach_info pcm990_fbinfo __initdata = {

	.modes			= &fb_info_nec_nl6448bc20_18d,

	.num_modes		= 1,

	.lccr0			= LCCR0_Act,

	.lccr3			= LCCR3_PixFlEdg,

	.pxafb_lcd_power	= pcm990_lcd_power,

};

#endif



static struct platform_pwm_backlight_data pcm990_backlight_data = {

	.pwm_id		= 0,

	.max_brightness	= 1023,

	.dft_brightness	= 1023,

	.pwm_period_ns	= 78770,

};



static struct platform_device pcm990_backlight_device = {

	.name		= "pwm-backlight",

	.dev		= {

		.parent = &pxa27x_device_pwm0.dev,

		.platform_data = &pcm990_backlight_data,

	},

};



/*

 * The PCM-990 development baseboard uses PCM-027's hardware in the

 * following way:

 *

 * - LCD support is in use
@@ -393,6 +484,12 @@ void __init pcm990_baseboard_init(void) 
	/* register CPLD's IRQ controller */

	pcm990_init_irq();



#ifndef CONFIG_PCM990_DISPLAY_NONE

	set_pxa_fb_info(&pcm990_fbinfo);

#endif

	pxa_gpio_mode(GPIO16_PWM0_MD);

	platform_device_register(&pcm990_backlight_device);



	platform_device_register(&pxa27x_device_ac97);



	/* MMC */