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authorAndré Draszik <andre.draszik@linaro.org>2024-02-01 19:11:39 +0300
committerKrzysztof Kozlowski <krzysztof.kozlowski@linaro.org>2024-02-07 18:33:16 +0300
commit2999e786d7e9596a0057d70098e339d59d7e72f9 (patch)
treef029547a5f01bcb744102f6713735d818800b055 /Documentation/devicetree/bindings/clock
parent3ab1d817c357a5a8d91898f0bf61370fc35277bb (diff)
downloadlinux-2999e786d7e9596a0057d70098e339d59d7e72f9.tar.xz
clk: samsung: gs101: add support for cmu_peric1
CMU_PERIC1 is the clock management unit used for the peric1 block which is used for additional USI, I3C and PWM interfaces/busses. Add support for muxes, dividers and gates of cmu_peric1, except for CLK_GOUT_PERIC1_IP which isn't well described in the datasheet and which downstream also ignores (similar to cmu_peric0). Two clocks have been marked as CLK_IS_CRITICAL for the following reason: * disabling them makes it impossible to access any peric1 registers, (including those two registers). * disabling gout_peric1_lhm_axi_p_peric1_i_clk sometimes has the additional effect of making the whole system unresponsive. One clock marked as CLK_IGNORE_UNUSED needs to be kept on until we have updated the respective driver for the following reason: * gout_peric1_gpio_peric1_pclk is required by the pinctrl configuration. With this clock disabled, reconfiguring the pins (for USI/I2C, USI/UART) will hang during register access. Since pinctrl-samsung doesn't support a clock at the moment, we just keep the kernel from disabling it at boot, until we have an update for pinctrl-samsung, at which point we'll drop the flag. Signed-off-by: André Draszik <andre.draszik@linaro.org> Reviewed-by: Sam Protsenko <semen.protsenko@linaro.org> Reviewed-by: Peter Griffin <peter.griffin@linaro.org> Reviewed-by: Tudor Ambarus <tudor.ambarus@linaro.org> Link: https://lore.kernel.org/r/20240201161258.1013664-4-andre.draszik@linaro.org Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
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