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authorEugen Hristev <eugen.hristev@microchip.com>2019-12-10 11:25:19 +0000
committerStephen Boyd <sboyd@kernel.org>2020-01-05 19:06:54 -0800
commit66d9f5214c9ba1c151478f99520b6817302d50dc (patch)
treec32ec79cab5c4b87ff0a6221b0156aa0eff83885
parentdb2f44820a981d353c41d36b27dccd3bb90b5e62 (diff)
clk: at91: sam9x60: fix programmable clock prescaler
The prescaler works as parent rate divided by (PRES + 1) (is_pres_direct == 1) It does not work in the way of parent rate shifted to the right by (PRES + 1), which means division by 2^(PRES + 1) (is_pres_direct == 0) Thus is_pres_direct must be enabled for this SoC, to make the right computation. This field was added in commit 45b06682113b ("clk: at91: fix programmable clock for sama5d2") SAM9X60 has the same field as SAMA5D2 in the PCK Fixes: 01e2113de9a5 ("clk: at91: add sam9x60 pmc driver") Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com> Link: https://lkml.kernel.org/r/1575977088-16781-1-git-send-email-eugen.hristev@microchip.com Signed-off-by: Stephen Boyd <sboyd@kernel.org>
-rw-r--r--drivers/clk/at91/sam9x60.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/clk/at91/sam9x60.c b/drivers/clk/at91/sam9x60.c
index 86238d5ecb4d..77398aefeb6d 100644
--- a/drivers/clk/at91/sam9x60.c
+++ b/drivers/clk/at91/sam9x60.c
@@ -47,6 +47,7 @@ static const struct clk_programmable_layout sam9x60_programmable_layout = {
.pres_shift = 8,
.css_mask = 0x1f,
.have_slck_mck = 0,
+ .is_pres_direct = 1,
};
static const struct clk_pcr_layout sam9x60_pcr_layout = {