From a9913dccdeaabca37343d0d8b0a48cda1e434e02 Mon Sep 17 00:00:00 2001 From: Phil Elwell Date: Wed, 1 Mar 2017 16:06:53 +0000 Subject: [PATCH] clk-bcm2835: Correct the prediv logic If a clock has the prediv flag set, both the integer and fractional parts must be scaled when calculating the resulting frequency. Signed-off-by: Phil Elwell --- drivers/clk/bcm/clk-bcm2835.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) --- a/drivers/clk/bcm/clk-bcm2835.c +++ b/drivers/clk/bcm/clk-bcm2835.c @@ -616,8 +616,10 @@ static unsigned long bcm2835_pll_get_rat using_prediv = cprman_read(cprman, data->ana_reg_base + 4) & data->ana->fb_prediv_mask; - if (using_prediv) + if (using_prediv) { ndiv *= 2; + fdiv *= 2; + } return bcm2835_pll_rate_from_divisors(parent_rate, ndiv, fdiv, pdiv); }