> -----Original Message----- > From: Hiremath, Vaibhav > Sent: Monday, March 22, 2010 6:42 PM > To: linux-omap@vger.kernel.org > Cc: tomi.valkei...@nokia.com; Hiremath, Vaibhav > Subject: [PATCH] OMAP: LCD LS037V7DW01: Add Backlight driver support > > From: Vaibhav Hiremath <hvaib...@ti.com> > > Tested on OMAP3EVM for OMAP3530 and AM/DM 3730. > [Hiremath, Vaibhav] Tomi,
This patch is also pending, can you please review the same and provide your comments (if any) or merge it to your tree. Thanks, Vaibhav > Signed-off-by: Vaibhav Hiremath <hvaib...@ti.com> > --- > arch/arm/mach-omap2/board-omap3evm.c | 32 ++++++++ > .../video/omap2/displays/panel-sharp-ls037v7dw01.c | 75 > ++++++++++++++++++++ > 2 files changed, 107 insertions(+), 0 deletions(-) > > diff --git a/arch/arm/mach-omap2/board-omap3evm.c b/arch/arm/mach- > omap2/board-omap3evm.c > index f2a52c3..ad74340 100644 > --- a/arch/arm/mach-omap2/board-omap3evm.c > +++ b/arch/arm/mach-omap2/board-omap3evm.c > @@ -253,6 +253,36 @@ static void omap3_evm_disable_lcd(struct > omap_dss_device *dssdev) > lcd_enabled = 0; > } > > +/* > + * PWMA/B register offsets (TWL4030_MODULE_PWMA) > + */ > +#define TWL_LED_EN 0x0 > +#define TWL_LED_PWMON 0x0 > +#define TWL_LED_PWMOFF 0x1 > + > +static void omap3evm_set_bl_intensity(struct omap_dss_device *dssdev, int > level) > +{ > + unsigned char c; > + > + if (level > 100) > + return; > + /* > + * Enable LEDA for backlight > + */ > + twl_i2c_write_u8(TWL4030_MODULE_LED, 0x11, TWL_LED_EN); > + > + c = ((125 * (100 - level)) / 100); > + if (get_omap3_evm_rev() >= OMAP3EVM_BOARD_GEN_2) { > + c += 1; > + twl_i2c_write_u8(TWL4030_MODULE_PWMA, 0x7F, TWL_LED_PWMOFF); > + twl_i2c_write_u8(TWL4030_MODULE_PWMA, c, TWL_LED_PWMON); > + } else { > + c += 2; > + twl_i2c_write_u8(TWL4030_MODULE_PWMA, 0x1, TWL_LED_PWMON); > + twl_i2c_write_u8(TWL4030_MODULE_PWMA, c, TWL_LED_PWMOFF); > + } > +} > + > static struct omap_dss_device omap3_evm_lcd_device = { > .name = "lcd", > .driver_name = "sharp_ls_panel", > @@ -260,6 +290,8 @@ static struct omap_dss_device omap3_evm_lcd_device = { > .phy.dpi.data_lines = 18, > .platform_enable = omap3_evm_enable_lcd, > .platform_disable = omap3_evm_disable_lcd, > + .max_backlight_level = 100, > + .set_backlight = omap3evm_set_bl_intensity, > }; > > static int omap3_evm_enable_tv(struct omap_dss_device *dssdev) > diff --git a/drivers/video/omap2/displays/panel-sharp-ls037v7dw01.c > b/drivers/video/omap2/displays/panel-sharp-ls037v7dw01.c > index 8d51a5e..d4fcd69 100644 > --- a/drivers/video/omap2/displays/panel-sharp-ls037v7dw01.c > +++ b/drivers/video/omap2/displays/panel-sharp-ls037v7dw01.c > @@ -20,10 +20,16 @@ > #include <linux/module.h> > #include <linux/delay.h> > #include <linux/device.h> > +#include <linux/backlight.h> > +#include <linux/fb.h> > #include <linux/err.h> > > #include <plat/display.h> > > +struct sharp_data { > + struct backlight_device *bl; > +}; > + > static struct omap_video_timings sharp_ls_timings = { > .x_res = 480, > .y_res = 640, > @@ -39,18 +45,87 @@ static struct omap_video_timings sharp_ls_timings = { > .vbp = 1, > }; > > +static int sharp_ls_bl_update_status(struct backlight_device *bl) > +{ > + struct omap_dss_device *dssdev = dev_get_drvdata(&bl->dev); > + int level; > + > + if (!dssdev->set_backlight) > + return -EINVAL; > + > + if (bl->props.fb_blank == FB_BLANK_UNBLANK && > + bl->props.power == FB_BLANK_UNBLANK) > + level = bl->props.brightness; > + else > + level = 0; > + > + return dssdev->set_backlight(dssdev, level); > +} > + > +static int sharp_ls_bl_get_brightness(struct backlight_device *bl) > +{ > + if (bl->props.fb_blank == FB_BLANK_UNBLANK && > + bl->props.power == FB_BLANK_UNBLANK) > + return bl->props.brightness; > + > + return 0; > +} > + > +static const struct backlight_ops sharp_ls_bl_ops = { > + .get_brightness = sharp_ls_bl_get_brightness, > + .update_status = sharp_ls_bl_update_status, > +}; > + > + > + > static int sharp_ls_panel_probe(struct omap_dss_device *dssdev) > { > + struct backlight_device *bl; > + struct sharp_data *sd; > + int r; > + > dssdev->panel.config = OMAP_DSS_LCD_TFT | OMAP_DSS_LCD_IVS | > OMAP_DSS_LCD_IHS; > dssdev->panel.acb = 0x28; > dssdev->panel.timings = sharp_ls_timings; > > + sd = kzalloc(sizeof(*sd), GFP_KERNEL); > + if (!sd) > + return -ENOMEM; > + > + dev_set_drvdata(&dssdev->dev, sd); > + > + bl = backlight_device_register("sharp-ls", &dssdev->dev, dssdev, > + &sharp_ls_bl_ops); > + if (IS_ERR(bl)) { > + r = PTR_ERR(bl); > + kfree(sd); > + return r; > + } > + sd->bl = bl; > + > + bl->props.fb_blank = FB_BLANK_UNBLANK; > + bl->props.power = FB_BLANK_UNBLANK; > + bl->props.max_brightness = dssdev->max_backlight_level; > + bl->props.brightness = dssdev->max_backlight_level; > + > + r = sharp_ls_bl_update_status(bl); > + if (r < 0) > + dev_err(&dssdev->dev, "failed to set lcd brightness\n"); > + > return 0; > } > > static void sharp_ls_panel_remove(struct omap_dss_device *dssdev) > { > + struct sharp_data *sd = dev_get_drvdata(&dssdev->dev); > + struct backlight_device *bl = sd->bl; > + > + bl->props.power = FB_BLANK_POWERDOWN; > + sharp_ls_bl_update_status(bl); > + backlight_device_unregister(bl); > + > + kfree(sd); > } > > static int sharp_ls_power_on(struct omap_dss_device *dssdev) > -- > 1.6.2.4 -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html