diff options
Diffstat (limited to 'target/linux/brcm2708/patches-4.4/0258-clk-bcm2835-divider-value-has-to-be-1-or-more.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-4.4/0258-clk-bcm2835-divider-value-has-to-be-1-or-more.patch | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.4/0258-clk-bcm2835-divider-value-has-to-be-1-or-more.patch b/target/linux/brcm2708/patches-4.4/0258-clk-bcm2835-divider-value-has-to-be-1-or-more.patch new file mode 100644 index 0000000000..f6140cba9c --- /dev/null +++ b/target/linux/brcm2708/patches-4.4/0258-clk-bcm2835-divider-value-has-to-be-1-or-more.patch @@ -0,0 +1,36 @@ +From 54eece496d38fb701d9719169d9270d8798191cc Mon Sep 17 00:00:00 2001 +From: Martin Sperl <kernel@martin.sperl.org> +Date: Mon, 29 Feb 2016 11:39:20 +0000 +Subject: [PATCH 258/304] clk: bcm2835: divider value has to be 1 or more + +Current clamping of a normal divider allows a value < 1 to be valid. + +A divider of < 1 would actually only be possible if we had a PLL... + +So this patch clamps the divider to 1. + +Fixes: 41691b8862e2 ("clk: bcm2835: Add support for programming the +audio domain clocks") + +Signed-off-by: Martin Sperl <kernel@martin.sperl.org> +Signed-off-by: Eric Anholt <eric@anholt.net> +Reviewed-by: Eric Anholt <eric@anholt.net> +(cherry picked from commit 997f16bd5d2e9b3456027f96fcadfe1e2bf12f4e) +--- + drivers/clk/bcm/clk-bcm2835.c | 5 +++-- + 1 file changed, 3 insertions(+), 2 deletions(-) + +--- a/drivers/clk/bcm/clk-bcm2835.c ++++ b/drivers/clk/bcm/clk-bcm2835.c +@@ -1202,8 +1202,9 @@ static u32 bcm2835_clock_choose_div(stru + div += unused_frac_mask + 1; + div &= ~unused_frac_mask; + +- /* Clamp to the limits. */ +- div = max(div, unused_frac_mask + 1); ++ /* clamp to min divider of 1 */ ++ div = max_t(u32, div, 1 << CM_DIV_FRAC_BITS); ++ /* clamp to the highest possible fractional divider */ + div = min_t(u32, div, GENMASK(data->int_bits + CM_DIV_FRAC_BITS - 1, + CM_DIV_FRAC_BITS - data->frac_bits)); + |