clk: imx8m: Set CLK_GET_RATE_NOCACHE on dram clocks

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These clocks are only modified as part of DRAM frequency switches during
which DRAM itself is briefly inaccessible. The switch is performed with
a SMC call to by TF-A which runs from a SRAM area; upon returning to
linux several clocks bits are modified and we need to update them.

For rate bits an easy solution is to just mark with
CLK_GET_RATE_NOCACHE so that new rates are always read back from
registers.

Signed-off-by: Leonard Crestez <leonard.crestez@nxp.com>
Reviewed-by: Abel Vesa <abel.vesa@nxp.com>
Acked-by: Stephen Boyd <sboyd@kernel.org>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

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Leonard Crestez 2019-11-22 23:45:00 +02:00 • committed by Shawn Guo

parent 2871736869

commit d9ea9ca2b4

3 changed files with 23 additions and 8 deletions

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9

drivers/clk/imx/clk-imx8mm.c

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10

drivers/clk/imx/clk-imx8mn.c

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12

drivers/clk/imx/clk-imx8mq.c

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