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ARM: OMAP: zoom: Use pwm stack for lcd and keyboard backlight 

Use pwm_leds driver for the keyboard light and pwm-backlight for the lcd
backlight control (instead of implementing the PWM driver part in the board
file).

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
This commit is contained in:
Peter Ujfalusi 2013-03-11 13:57:00 +02:00 committed by Tomi Valkeinen
parent c3f80cbcac
commit c1c8813776
2 changed files with 52 additions and 57 deletions
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56
arch/arm/mach-omap2/board-zoom-display.c
View File

@ -12,7 +12,6 @@
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/gpio.h>
#include <linux/i2c/twl.h>
#include <linux/spi/spi.h>
#include <linux/platform_data/spi-omap2-mcspi.h>
#include <video/omapdss.h>
@ -49,59 +48,6 @@ static void zoom_panel_disable_lcd(struct omap_dss_device *dssdev)
{
}
/* Register offsets in TWL4030_MODULE_INTBR */
#define TWL_INTBR_PMBR1 0xD
#define TWL_INTBR_GPBR1 0xC
/* Register offsets in TWL_MODULE_PWM */
#define TWL_LED_PWMON 0x3
#define TWL_LED_PWMOFF 0x4
static int zoom_set_bl_intensity(struct omap_dss_device *dssdev, int level)
{
#ifdef CONFIG_TWL4030_CORE
unsigned char c;
u8 mux_pwm, enb_pwm;
if (level > 100)
return -1;
twl_i2c_read_u8(TWL4030_MODULE_INTBR, &mux_pwm, TWL_INTBR_PMBR1);
twl_i2c_read_u8(TWL4030_MODULE_INTBR, &enb_pwm, TWL_INTBR_GPBR1);
if (level == 0) {
/* disable pwm1 output and clock */
enb_pwm = enb_pwm & 0xF5;
/* change pwm1 pin to gpio pin */
mux_pwm = mux_pwm & 0xCF;
twl_i2c_write_u8(TWL4030_MODULE_INTBR,
enb_pwm, TWL_INTBR_GPBR1);
twl_i2c_write_u8(TWL4030_MODULE_INTBR,
mux_pwm, TWL_INTBR_PMBR1);
return 0;
}
if (!((enb_pwm & 0xA) && (mux_pwm & 0x30))) {
/* change gpio pin to pwm1 pin */
mux_pwm = mux_pwm | 0x30;
/* enable pwm1 output and clock*/
enb_pwm = enb_pwm | 0x0A;
twl_i2c_write_u8(TWL4030_MODULE_INTBR,
mux_pwm, TWL_INTBR_PMBR1);
twl_i2c_write_u8(TWL4030_MODULE_INTBR,
enb_pwm, TWL_INTBR_GPBR1);
}
c = ((50 * (100 - level)) / 100) + 1;
twl_i2c_write_u8(TWL_MODULE_PWM, 0x7F, TWL_LED_PWMOFF);
twl_i2c_write_u8(TWL_MODULE_PWM, c, TWL_LED_PWMON);
#else
pr_warn("Backlight not enabled\n");
#endif
return 0;
}
static struct omap_dss_device zoom_lcd_device = {
.name = "lcd",
.driver_name = "NEC_8048_panel",
@ -109,8 +55,6 @@ static struct omap_dss_device zoom_lcd_device = {
.phy.dpi.data_lines = 24,
.platform_enable = zoom_panel_enable_lcd,
.platform_disable = zoom_panel_disable_lcd,
.max_backlight_level = 100,
.set_backlight = zoom_set_bl_intensity,
};
static struct omap_dss_device *zoom_dss_devices[] = {

53
arch/arm/mach-omap2/board-zoom-peripherals.c
View File

@ -22,6 +22,9 @@
#include <linux/platform_data/gpio-omap.h>
#include <linux/platform_data/omap-twl4030.h>
#include <linux/usb/phy.h>
#include <linux/pwm.h>
#include <linux/leds_pwm.h>
#include <linux/pwm_backlight.h>
#include <asm/mach-types.h>
#include <asm/mach/arch.h>
@ -193,6 +196,53 @@ static struct platform_device omap_vwlan_device = {
},
};
static struct pwm_lookup zoom_pwm_lookup[] = {
PWM_LOOKUP("twl-pwm", 0, "leds_pwm", "zoom::keypad"),
PWM_LOOKUP("twl-pwm", 1, "pwm-backlight", "backlight"),
};
static struct led_pwm zoom_pwm_leds[] = {
{
.name = "zoom::keypad",
.max_brightness = 127,
.pwm_period_ns = 7812500,
},
};
static struct led_pwm_platform_data zoom_pwm_data = {
.num_leds = ARRAY_SIZE(zoom_pwm_leds),
.leds = zoom_pwm_leds,
};
static struct platform_device zoom_leds_pwm = {
.name = "leds_pwm",
.id = -1,
.dev = {
.platform_data = &zoom_pwm_data,
},
};
static struct platform_pwm_backlight_data zoom_backlight_data = {
.pwm_id = 1,
.max_brightness = 127,
.dft_brightness = 127,
.pwm_period_ns = 7812500,
};
static struct platform_device zoom_backlight_pwm = {
.name = "pwm-backlight",
.id = -1,
.dev = {
.platform_data = &zoom_backlight_data,
},
};
static struct platform_device *zoom_devices[] __initdata = {
&omap_vwlan_device,
&zoom_leds_pwm,
&zoom_backlight_pwm,
};
static struct wl12xx_platform_data omap_zoom_wlan_data __initdata = {
.board_ref_clock = WL12XX_REFCLOCK_26, /* 26 MHz */
};
@ -301,7 +351,8 @@ void __init zoom_peripherals_init(void)
omap_hsmmc_init(mmc);
omap_i2c_init();
platform_device_register(&omap_vwlan_device);
pwm_add_table(zoom_pwm_lookup, ARRAY_SIZE(zoom_pwm_lookup));
platform_add_devices(zoom_devices, ARRAY_SIZE(zoom_devices));
usb_bind_phy("musb-hdrc.0.auto", 0, "twl4030_usb");
usb_musb_init(NULL);
enable_board_wakeup_source();