diff options
| author | Tomi Valkeinen <tomi.valkeinen@ti.com> | 2014-12-31 13:22:42 +0100 |
|---|---|---|
| committer | Tomi Valkeinen <tomi.valkeinen@ti.com> | 2015-02-04 11:32:03 +0100 |
| commit | eb30199b46e3d4ed73d2ad0b7f4da418d7da1da8 (patch) | |
| tree | 5282e74fb52c39f4c2b8b5694c9401f1ab57dd92 /drivers/video | |
| parent | OMAPDSS: Add enum dss_pll_id (diff) | |
| download | linux-eb30199b46e3d4ed73d2ad0b7f4da418d7da1da8.tar.xz linux-eb30199b46e3d4ed73d2ad0b7f4da418d7da1da8.zip | |
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.h | 1 | ||||
| -rw-r--r-- | drivers/video/fbdev/omap2/dss/pll.c | 10 |
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; |