[RFC][PATCH 3/3] OMAP: DSS2: Use vdds_sdi regulator supply in SDI
From: Roger Quadros <hidden>
Date: 2010-03-12 15:37:55
Subsystem:
framebuffer layer, the rest · Maintainers:
Helge Deller, Linus Torvalds
From: Roger Quadros <redacted> This patch enables the use of vdds_sdi regulator in SDI subsystem. We can disable the vdds_sdi voltage when not in use to save power. Signed-off-by: Roger Quadros <redacted> --- drivers/video/omap2/dss/sdi.c | 23 +++++++++++++++++++++-- 1 files changed, 21 insertions(+), 2 deletions(-)
diff --git a/drivers/video/omap2/dss/sdi.c b/drivers/video/omap2/dss/sdi.c
index 45aab89..e816e80 100644
--- a/drivers/video/omap2/dss/sdi.c
+++ b/drivers/video/omap2/dss/sdi.c@@ -23,13 +23,16 @@ #include <linux/clk.h> #include <linux/delay.h> #include <linux/err.h> +#include <linux/regulator/consumer.h> #include <plat/display.h> +#include <plat/cpu.h> #include "dss.h" static struct { bool skip_init; bool update_enabled; + struct regulator *vdds_sdi_reg; } sdi; static void sdi_basic_init(void)
@@ -57,6 +60,12 @@ int omapdss_sdi_display_enable(struct omap_dss_device *dssdev) goto err0; } + if (cpu_is_omap34xx()) { + r = regulator_enable(sdi.vdds_sdi_reg); + if (r) + goto err1; + } + /* In case of skip_init sdi_init has already enabled the clocks */ if (!sdi.skip_init) dss_clk_enable(DSS_CLK_ICK | DSS_CLK_FCK1);
@@ -118,10 +127,10 @@ int omapdss_sdi_display_enable(struct omap_dss_device *dssdev) sdi.skip_init = 0; return 0; -err3: - dssdev->manager->disable(dssdev->manager); err2: dss_clk_disable(DSS_CLK_ICK | DSS_CLK_FCK1); + if (cpu_is_omap34xx()) + regulator_enable(sdi.vdds_sdi_reg); err1: omap_dss_stop_device(dssdev); err0:
@@ -137,6 +146,9 @@ void omapdss_sdi_display_disable(struct omap_dss_device *dssdev) dss_clk_disable(DSS_CLK_ICK | DSS_CLK_FCK1); + if (cpu_is_omap34xx()) + regulator_enable(sdi.vdds_sdi_reg); + omap_dss_stop_device(dssdev); } EXPORT_SYMBOL(omapdss_sdi_display_disable);
@@ -144,6 +156,13 @@ EXPORT_SYMBOL(omapdss_sdi_display_disable); int sdi_init_display(struct omap_dss_device *dssdev) { DSSDBG("SDI init\n"); + if (cpu_is_omap34xx()) { + sdi.vdds_sdi_reg = dss_get_vdds_sdi(); + if (IS_ERR(sdi.vdds_sdi_reg)) { + DSSERR("can't get VDDS_SDI regulator\n"); + return PTR_ERR(sdi.vdds_sdi_reg); + } + } return 0; }
--
1.6.0.4