From: hvaibhav@ti.com
To: tomi.valkeinen@nokia.com
Cc: linux-omap@vger.kernel.org, Vaibhav Hiremath <hvaibhav@ti.com>
Subject: [PATCH-RESEND 2/2] OMAP: OMAP3EVM: Add LCD Backlight brightness hookup function
Date: Thu, 15 Apr 2010 19:30:01 +0530 [thread overview]
Message-ID: <1271340001-19831-2-git-send-email-hvaibhav@ti.com> (raw)
In-Reply-To: <hvaibhav@ti.com>
From: Vaibhav Hiremath <hvaibhav@ti.com>
Signed-off-by: Vaibhav Hiremath <hvaibhav@ti.com>
---
arch/arm/mach-omap2/board-omap3evm.c | 34 ++++++++++++++++++++++++++++++++++
1 files changed, 34 insertions(+), 0 deletions(-)
diff --git a/arch/arm/mach-omap2/board-omap3evm.c b/arch/arm/mach-omap2/board-omap3evm.c
index f2a52c3..1d1956f 100644
--- a/arch/arm/mach-omap2/board-omap3evm.c
+++ b/arch/arm/mach-omap2/board-omap3evm.c
@@ -253,6 +253,38 @@ 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 int omap3evm_set_bl_intensity(struct omap_dss_device *dssdev, int level)
+{
+ unsigned char c;
+
+ if (level > 100)
+ return -EINVAL;
+ /*
+ * 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);
+ }
+
+ return 0;
+}
+
static struct omap_dss_device omap3_evm_lcd_device = {
.name = "lcd",
.driver_name = "sharp_ls_panel",
@@ -260,6 +292,8 @@ 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)
--
1.6.2.4
next reply other threads:[~2010-04-15 14:00 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-04-15 14:00 hvaibhav [this message]
2010-04-15 14:14 ` [PATCH-RESEND 2/2] OMAP: OMAP3EVM: Add LCD Backlight brightness hookup function Tomi Valkeinen
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