4.14-stable review patch. If anyone has any objections, please let me know.
------------------ From: Troy Kisky <[email protected]> commit c8384bb04261b9d32fe7402a6068ddaf38913b23 upstream. Previously it was returning the best of 32768, 8192, 1024, 64, 2, 0 Now, best of 32768, 8192, 4096, 2048, 1024, 512, 256, 128, 64, 32, 16, 8, 4, 2, 1, 0 Signed-off-by: Troy Kisky <[email protected]> Signed-off-by: Alexandre Belloni <[email protected]> Cc: Christoph Fritz <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- drivers/rtc/rtc-m41t80.c | 19 +++++++------------ 1 file changed, 7 insertions(+), 12 deletions(-) --- a/drivers/rtc/rtc-m41t80.c +++ b/drivers/rtc/rtc-m41t80.c @@ -468,18 +468,13 @@ static unsigned long m41t80_sqw_recalc_r static long m41t80_sqw_round_rate(struct clk_hw *hw, unsigned long rate, unsigned long *prate) { - int i, freq = M41T80_SQW_MAX_FREQ; - - if (freq <= rate) - return freq; - - for (i = 2; i <= ilog2(M41T80_SQW_MAX_FREQ); i++) { - freq /= 1 << i; - if (freq <= rate) - return freq; - } - - return 0; + if (rate >= M41T80_SQW_MAX_FREQ) + return M41T80_SQW_MAX_FREQ; + if (rate >= M41T80_SQW_MAX_FREQ / 4) + return M41T80_SQW_MAX_FREQ / 4; + if (!rate) + return 0; + return 1 << ilog2(rate); } static int m41t80_sqw_set_rate(struct clk_hw *hw, unsigned long rate,
