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| author | Tomi Valkeinen <tomi.valkeinen@ti.com> | 2012-10-15 14:27:04 +0400 |
|---|---|---|
| committer | Tomi Valkeinen <tomi.valkeinen@ti.com> | 2012-11-05 13:14:05 +0400 |
| commit | 930b027eb41e31e86618ecd06cf4acf1e44c136b (patch) | |
| tree | 6f4285a438e9280aacdcaa82834a97cfbb910752 /drivers/video/omap2/dss/dss.c | |
| parent | 7a98786caa18eaa8a5e61382a575f0b6c8e81c01 (diff) | |
| download | linux-930b027eb41e31e86618ecd06cf4acf1e44c136b.tar.xz | |
OMAPDSS: add dss_calc_clock_rates() back
dss_calc_clock_rates() was removed earlier as it was not used, but it is
needed for DSI PLL calculations, so this patch adds it back.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Diffstat (limited to 'drivers/video/omap2/dss/dss.c')
| -rw-r--r-- | drivers/video/omap2/dss/dss.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/drivers/video/omap2/dss/dss.c b/drivers/video/omap2/dss/dss.c index 456118beb1f8..d40653bf7a6c 100644 --- a/drivers/video/omap2/dss/dss.c +++ b/drivers/video/omap2/dss/dss.c @@ -432,6 +432,29 @@ enum omap_dss_clk_source dss_get_lcd_clk_source(enum omap_channel channel) } } +/* calculate clock rates using dividers in cinfo */ +int dss_calc_clock_rates(struct dss_clock_info *cinfo) +{ + if (dss.dpll4_m4_ck) { + unsigned long prate; + + if (cinfo->fck_div > dss.feat->fck_div_max || + cinfo->fck_div == 0) + return -EINVAL; + + prate = clk_get_rate(clk_get_parent(dss.dpll4_m4_ck)); + + cinfo->fck = prate / cinfo->fck_div * + dss.feat->dss_fck_multiplier; + } else { + if (cinfo->fck_div != 0) + return -EINVAL; + cinfo->fck = clk_get_rate(dss.dss_clk); + } + + return 0; +} + int dss_set_clock_div(struct dss_clock_info *cinfo) { if (dss.dpll4_m4_ck) { |