Messages in this thread Patch in this message | | | From | <> | Subject | [PATCH] clk: at91: sam9x60: fix programmable clock prescaler | Date | Tue, 10 Dec 2019 11:25:19 +0000 |
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From: Eugen Hristev <eugen.hristev@microchip.com>
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> --- drivers/clk/at91/sam9x60.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/drivers/clk/at91/sam9x60.c b/drivers/clk/at91/sam9x60.c index 86238d5..77398ae 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 = { -- 2.7.4
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