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authorTomi Valkeinen <tomi.valkeinen@ti.com>2014-12-31 15:22:42 +0300
committerTomi Valkeinen <tomi.valkeinen@ti.com>2015-02-04 13:32:03 +0300
commiteb30199b46e3d4ed73d2ad0b7f4da418d7da1da8 (patch)
tree5282e74fb52c39f4c2b8b5694c9401f1ab57dd92 /drivers/video
parent64e22ffdabeb9391f576bedbed03c480a1ecd593 (diff)
downloadlinux-eb30199b46e3d4ed73d2ad0b7f4da418d7da1da8.tar.xz
OMAPDSS: PLL: add dss_pll_wait_reset_done()
Add a helper function to wait until the PLL's reset is done. Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Diffstat (limited to 'drivers/video')
-rw-r--r--drivers/video/fbdev/omap2/dss/dss.h1
-rw-r--r--drivers/video/fbdev/omap2/dss/pll.c10
2 files changed, 11 insertions, 0 deletions
diff --git a/drivers/video/fbdev/omap2/dss/dss.h b/drivers/video/fbdev/omap2/dss/dss.h
index 1826ee96265b..d6c9c3d3db14 100644
--- a/drivers/video/fbdev/omap2/dss/dss.h
+++ b/drivers/video/fbdev/omap2/dss/dss.h
@@ -453,5 +453,6 @@ int dss_pll_write_config_type_a(struct dss_pll *pll,
const struct dss_pll_clock_info *cinfo);
int dss_pll_write_config_type_b(struct dss_pll *pll,
const struct dss_pll_clock_info *cinfo);
+int dss_pll_wait_reset_done(struct dss_pll *pll);
#endif
diff --git a/drivers/video/fbdev/omap2/dss/pll.c b/drivers/video/fbdev/omap2/dss/pll.c
index 335ffac224b9..f974ddcd3b6e 100644
--- a/drivers/video/fbdev/omap2/dss/pll.c
+++ b/drivers/video/fbdev/omap2/dss/pll.c
@@ -222,6 +222,16 @@ static int wait_for_bit_change(void __iomem *reg, int bitnum, int value)
return !value;
}
+int dss_pll_wait_reset_done(struct dss_pll *pll)
+{
+ void __iomem *base = pll->base;
+
+ if (wait_for_bit_change(base + PLL_STATUS, 0, 1) != 1)
+ return -ETIMEDOUT;
+ else
+ return 0;
+}
+
static int dss_wait_hsdiv_ack(struct dss_pll *pll, u32 hsdiv_ack_mask)
{
int t = 100;