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| author | Eugen Hristev <eugen.hristev@microchip.com> | 2019-12-10 14:25:19 +0300 |
|---|---|---|
| committer | Stephen Boyd <sboyd@kernel.org> | 2020-01-06 06:06:54 +0300 |
| commit | 66d9f5214c9ba1c151478f99520b6817302d50dc (patch) | |
| tree | c32ec79cab5c4b87ff0a6221b0156aa0eff83885 /drivers/clk/at91 | |
| parent | db2f44820a981d353c41d36b27dccd3bb90b5e62 (diff) | |
| download | linux-66d9f5214c9ba1c151478f99520b6817302d50dc.tar.xz | |
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>
Diffstat (limited to 'drivers/clk/at91')
| -rw-r--r-- | drivers/clk/at91/sam9x60.c | 1 |
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 = { |