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: Tony Lindgren <tony@atomide.com>

2 files changed, 52 insertions, 57 deletions

diff --git a/arch/arm/mach-omap2/board-zoom-display.c b/arch/arm/mach-omap2/board-zoom-display.c
index 8cef477d6b00..9a7174faac51 100644
--- a/arch/arm/mach-omap2/board-zoom-display.c
+++ b/arch/arm/mach-omap2/board-zoom-display.c
@@ -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[] = {
diff --git a/arch/arm/mach-omap2/board-zoom-peripherals.c b/arch/arm/mach-omap2/board-zoom-peripherals.c
index cdc0c1021863..a90375d5b2b6 100644
--- a/arch/arm/mach-omap2/board-zoom-peripherals.c
+++ b/arch/arm/mach-omap2/board-zoom-peripherals.c
@@ -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();