diff options
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) { |