diff options
Diffstat (limited to 'drivers/clk/at91/clk-generated.c')
| -rw-r--r-- | drivers/clk/at91/clk-generated.c | 18 |
1 files changed, 9 insertions, 9 deletions
diff --git a/drivers/clk/at91/clk-generated.c b/drivers/clk/at91/clk-generated.c index 8c9a3cb053a..2aacbaef0c0 100644 --- a/drivers/clk/at91/clk-generated.c +++ b/drivers/clk/at91/clk-generated.c @@ -53,16 +53,17 @@ static ulong generic_clk_get_rate(struct clk *clk) struct clk parent; ulong clk_rate; u32 tmp, gckdiv; - u8 parent_id; + u8 clock_source, parent_index; int ret; writel(clk->id & AT91_PMC_PCR_PID_MASK, &pmc->pcr); tmp = readl(&pmc->pcr); - parent_id = (tmp >> AT91_PMC_PCR_GCKCSS_OFFSET) & + clock_source = (tmp >> AT91_PMC_PCR_GCKCSS_OFFSET) & AT91_PMC_PCR_GCKCSS_MASK; gckdiv = (tmp >> AT91_PMC_PCR_GCKDIV_OFFSET) & AT91_PMC_PCR_GCKDIV_MASK; - ret = clk_get_by_index(dev_get_parent(clk->dev), parent_id, &parent); + parent_index = clock_source - 1; + ret = clk_get_by_index(dev_get_parent(clk->dev), parent_index, &parent); if (ret) return 0; @@ -82,7 +83,7 @@ static ulong generic_clk_set_rate(struct clk *clk, ulong rate) ulong tmp_rate, best_rate = rate, parent_rate; int tmp_diff, best_diff = -1; u32 div, best_div = 0; - u8 best_parent_id = 0; + u8 best_parent_index, best_clock_source = 0; u8 i; u32 tmp; int ret; @@ -98,9 +99,7 @@ static ulong generic_clk_set_rate(struct clk *clk, ulong rate) for (div = 1; div < GENERATED_MAX_DIV + 2; div++) { tmp_rate = DIV_ROUND_CLOSEST(parent_rate, div); - if (rate < tmp_rate) - continue; - tmp_diff = rate - tmp_rate; + tmp_diff = abs(rate - tmp_rate); if (best_diff < 0 || best_diff > tmp_diff) { best_rate = tmp_rate; @@ -108,7 +107,8 @@ static ulong generic_clk_set_rate(struct clk *clk, ulong rate) best_div = div - 1; best_parent = parent; - best_parent_id = i; + best_parent_index = i; + best_clock_source = best_parent_index + 1; } if (!best_diff || tmp_rate < rate) @@ -129,7 +129,7 @@ static ulong generic_clk_set_rate(struct clk *clk, ulong rate) writel(clk->id & AT91_PMC_PCR_PID_MASK, &pmc->pcr); tmp = readl(&pmc->pcr); tmp &= ~(AT91_PMC_PCR_GCKDIV | AT91_PMC_PCR_GCKCSS); - tmp |= AT91_PMC_PCR_GCKCSS_(best_parent_id) | + tmp |= AT91_PMC_PCR_GCKCSS_(best_clock_source) | AT91_PMC_PCR_CMD_WRITE | AT91_PMC_PCR_GCKDIV_(best_div) | AT91_PMC_PCR_GCKEN; |