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authorGuennadi Liakhovetski <lg@denx.de>2008-06-13 12:50:44 +0200
committerRussell King <rmk+kernel@arm.linux.org.uk>2008-07-03 14:25:09 +0200
commitc0f7edb3099d538017c52556aab596b857dc92ee (patch)
tree1ac30bbaed92541bf17241b2eeb629c31163e219
parent[ARM] 5045/1: magician: use the pwm_bl driver for the LCD backlight (diff)
downloadlinux-c0f7edb3099d538017c52556aab596b857dc92ee.tar.xz
linux-c0f7edb3099d538017c52556aab596b857dc92ee.zip
[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: Guennadi Liakhovetski <g.liakhovetski@pengutronix.de> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
-rw-r--r--arch/arm/mach-pxa/Kconfig16
-rw-r--r--arch/arm/mach-pxa/pcm990-baseboard.c99
2 files changed, 114 insertions, 1 deletions
diff --git a/arch/arm/mach-pxa/Kconfig b/arch/arm/mach-pxa/Kconfig
index 7db0fd87a45d..03cbd0f7285b 100644
--- a/arch/arm/mach-pxa/Kconfig
+++ b/arch/arm/mach-pxa/Kconfig
@@ -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
diff --git a/arch/arm/mach-pxa/pcm990-baseboard.c b/arch/arm/mach-pxa/pcm990-baseboard.c
index 49d951db0f3d..2564e16e4e2f 100644
--- a/arch/arm/mach-pxa/pcm990-baseboard.c
+++ b/arch/arm/mach-pxa/pcm990-baseboard.c
@@ -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"
+
+/*
+ * 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 hardeware in the
+ * 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 */