diff options
Diffstat (limited to 'target/linux/brcm2708/patches-4.9/0194-clk-bcm2835-Correct-the-prediv-logic.patch')
-rw-r--r-- | target/linux/brcm2708/patches-4.9/0194-clk-bcm2835-Correct-the-prediv-logic.patch | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.9/0194-clk-bcm2835-Correct-the-prediv-logic.patch b/target/linux/brcm2708/patches-4.9/0194-clk-bcm2835-Correct-the-prediv-logic.patch new file mode 100644 index 0000000000..c81194fe69 --- /dev/null +++ b/target/linux/brcm2708/patches-4.9/0194-clk-bcm2835-Correct-the-prediv-logic.patch @@ -0,0 +1,27 @@ +From a9913dccdeaabca37343d0d8b0a48cda1e434e02 Mon Sep 17 00:00:00 2001 +From: Phil Elwell <phil@raspberrypi.org> +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 <phil@raspberrypi.org> +--- + 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); + } |