clk: at91: sam9x60: fix programmable clock

[ Upstream commit 2200ab6a7403f4fcd052c55ca328fc942f9392b6 ]

The prescaler mask for sam9x60 must be 0xff (8 bits).
Being set to 0, means that we cannot set any prescaler, thus the
programmable clocks do not work (except the case with prescaler 0)
Set the mask accordingly in layout struct.

Fixes: 01e2113de9a5 ("clk: at91: add sam9x60 pmc driver")
Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com>
Link: https://lkml.kernel.org/r/1569321191-27606-1-git-send-email-eugen.hristev@microchip.com
Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Acked-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/clk/at91/sam9x60.c b/drivers/clk/at91/sam9x60.c
index 9790ddfa5b3cba525c368bc4860a7a64067aac96..86238d5ecb4da948add6b2b3b203cda5cdd7bc21 100644 (file)
--- a/drivers/clk/at91/sam9x60.c
+++ b/drivers/clk/at91/sam9x60.c
@@ -43,6 +43,7 @@ static const struct clk_pll_characteristics upll_characteristics = {
 };
 
 static const struct clk_programmable_layout sam9x60_programmable_layout = {
+       .pres_mask = 0xff,
        .pres_shift = 8,
        .css_mask = 0x1f,
        .have_slck_mck = 0,