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clk: at91: clk-generated: select absolute closest rate

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To get the same behavior as the Linux driver, instead of selecting
the closest inferior rate, select the closest inferior or superior
rate

Signed-off-by: Ludovic Desroches <ludovic.desroches@microchip.com>
Signed-off-by: Wenyou Yang <wenyou.yang@microchip.com>
This commit is contained in:
Ludovic Desroches
2017-11-17 14:50:21 +08:00
committed by Tom Rini
parent 9e0eb01239
commit eb1ed2b19b
1 changed files with 1 additions and 3 deletions
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4
drivers/clk/at91/clk-generated.c
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@@ -98,9 +98,7 @@ static ulong generic_clk_set_rate(struct clk *clk, ulong rate)
for (div = 1; div < GENERATED_MAX_DIV + 2; div++) { for (div = 1; div < GENERATED_MAX_DIV + 2; div++) {
tmp_rate = DIV_ROUND_CLOSEST(parent_rate, div); tmp_rate = DIV_ROUND_CLOSEST(parent_rate, div);
if (rate < tmp_rate) tmp_diff = abs(rate - tmp_rate);
continue;
tmp_diff = rate - tmp_rate;
if (best_diff < 0 || best_diff > tmp_diff) { if (best_diff < 0 || best_diff > tmp_diff) {
best_rate = tmp_rate; best_rate = tmp_rate;