diff options
| author | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2016-09-11 04:34:46 -0300 |
|---|---|---|
| committer | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2016-09-11 04:34:46 -0300 |
| commit | 863981e96738983919de841ec669e157e6bdaeb0 (patch) | |
| tree | d6d89a12e7eb8017837c057935a2271290907f76 /drivers/clk/ingenic/cgu.c | |
| parent | 8dec7c70575785729a6a9e6719a955e9c545bcab (diff) | |
Linux-libre 4.7.1-gnupck-4.7.1-gnu
Diffstat (limited to 'drivers/clk/ingenic/cgu.c')
| -rw-r--r-- | drivers/clk/ingenic/cgu.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/drivers/clk/ingenic/cgu.c b/drivers/clk/ingenic/cgu.c index 7cfb7b2a2..e8248f918 100644 --- a/drivers/clk/ingenic/cgu.c +++ b/drivers/clk/ingenic/cgu.c @@ -325,6 +325,7 @@ ingenic_clk_recalc_rate(struct clk_hw *hw, unsigned long parent_rate) div = (div_reg >> clk_info->div.shift) & GENMASK(clk_info->div.bits - 1, 0); div += 1; + div *= clk_info->div.div; rate /= div; } @@ -345,6 +346,14 @@ ingenic_clk_calc_div(const struct ingenic_cgu_clk_info *clk_info, div = min_t(unsigned, div, 1 << clk_info->div.bits); div = max_t(unsigned, div, 1); + /* + * If the divider value itself must be divided before being written to + * the divider register, we must ensure we don't have any bits set that + * would be lost as a result of doing so. + */ + div /= clk_info->div.div; + div *= clk_info->div.div; + return div; } @@ -395,7 +404,7 @@ ingenic_clk_set_rate(struct clk_hw *hw, unsigned long req_rate, /* update the divide */ mask = GENMASK(clk_info->div.bits - 1, 0); reg &= ~(mask << clk_info->div.shift); - reg |= (div - 1) << clk_info->div.shift; + reg |= ((div / clk_info->div.div) - 1) << clk_info->div.shift; /* clear the stop bit */ if (clk_info->div.stop_bit != -1) |