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OMAPDSS: PLL: add dss_pll_wait_reset_done()

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Add a helper function to wait until the PLL's reset is done.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
This commit is contained in:
Tomi Valkeinen 2014-12-31 14:22:42 +02:00
parent 64e22ffdab
commit eb30199b46
2 changed files with 11 additions and 0 deletions
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1
drivers/video/fbdev/omap2/dss/dss.h
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@ -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

10
drivers/video/fbdev/omap2/dss/pll.c
View file

@ -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;