[PATCHv3][ 02/11] video: imxfb: Introduce regulator support.
From: Denis Carikli <hidden>
Date: 2013-10-18 15:16:53
Also in:
linux-fbdev
Subsystem:
framebuffer layer, the rest · Maintainers:
Helge Deller, Linus Torvalds
This commit is based on the following commit by Fabio Estevam: 4344429 video: mxsfb: Introduce regulator support Cc: Fabio Estevam <redacted> Cc: Sascha Hauer <kernel@pengutronix.de> Cc: linux-arm-kernel at lists.infradead.org Cc: Jean-Christophe Plagniol-Villard <redacted> Cc: Tomi Valkeinen <redacted> Cc: linux-fbdev at vger.kernel.org Cc: Eric B?nard <redacted> Signed-off-by: Denis Carikli <redacted> --- drivers/video/imxfb.c | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+)
diff --git a/drivers/video/imxfb.c b/drivers/video/imxfb.c
index 44ee678..4dd7678 100644
--- a/drivers/video/imxfb.c
+++ b/drivers/video/imxfb.c@@ -28,6 +28,7 @@ #include <linux/cpufreq.h> #include <linux/clk.h> #include <linux/platform_device.h> +#include <linux/regulator/consumer.h> #include <linux/dma-mapping.h> #include <linux/io.h> #include <linux/math64.h>
@@ -145,6 +146,7 @@ struct imxfb_info { struct clk *clk_ipg; struct clk *clk_ahb; struct clk *clk_per; + struct regulator *reg_lcd; enum imxfb_type devtype; bool enabled;
@@ -563,12 +565,23 @@ static void imxfb_exit_backlight(struct imxfb_info *fbi) static void imxfb_enable_controller(struct imxfb_info *fbi) { + int ret; if (fbi->enabled) return; pr_debug("Enabling LCD controller\n"); + if (fbi->reg_lcd) { + ret = regulator_enable(fbi->reg_lcd); + if (ret) { + dev_err(&fbi->pdev->dev, + "lcd regulator enable failed with error: %d\n", + ret); + return; + } + } + writel(fbi->screen_dma, fbi->regs + LCDC_SSA); /* panning offset 0 (0 pixel offset) */
@@ -597,6 +610,8 @@ static void imxfb_enable_controller(struct imxfb_info *fbi) static void imxfb_disable_controller(struct imxfb_info *fbi) { + int ret; + if (!fbi->enabled) return;
@@ -613,6 +628,14 @@ static void imxfb_disable_controller(struct imxfb_info *fbi) fbi->enabled = false; writel(0, fbi->regs + LCDC_RMCR); + + if (fbi->reg_lcd) { + ret = regulator_disable(fbi->reg_lcd); + if (ret) + dev_err(&fbi->pdev->dev, + "lcd regulator disable failed with error: %d\n", + ret); + } } static int imxfb_blank(int blank, struct fb_info *info)
@@ -1020,6 +1043,10 @@ static int imxfb_probe(struct platform_device *pdev) goto failed_register; } + fbi->reg_lcd = devm_regulator_get(&pdev->dev, "lcd"); + if (IS_ERR(fbi->reg_lcd)) + fbi->reg_lcd = NULL; + imxfb_enable_controller(fbi); fbi->pdev = pdev; #ifdef PWMR_BACKLIGHT_AVAILABLE
--
1.7.9.5