The patch below does not apply to the 4.19-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to stable@vger.kernel.org.

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From 990539486e7e311fb5dab1bf4d85d1a8973ae644 Mon Sep 17 00:00:00 2001 From: Olivier Moysan olivier.moysan@foss.st.com Date: Thu, 9 Jun 2022 11:52:34 +0200 Subject: [PATCH] iio: adc: stm32: fix maximum clock rate for stm32mp15x

Change maximum STM32 ADC input clock rate to 36MHz, as specified in STM32MP15x datasheets.

Fixes: d58c67d1d851 ("iio: adc: stm32-adc: add support for STM32MP1") Signed-off-by: Olivier Moysan olivier.moysan@foss.st.com Reviewed-by: Fabrice Gasnier fabrice.gasnier@foss.st.com Link: https://lore.kernel.org/r/20220609095234.375925-1-olivier.moysan@foss.st.com Cc: Stable@vger.kernel.org Signed-off-by: Jonathan Cameron Jonathan.Cameron@huawei.com

diff --git a/drivers/iio/adc/stm32-adc-core.c b/drivers/iio/adc/stm32-adc-core.c index bb04deeb7992..3efb8c404ccc 100644 --- a/drivers/iio/adc/stm32-adc-core.c +++ b/drivers/iio/adc/stm32-adc-core.c @@ -809,7 +809,7 @@ static const struct stm32_adc_priv_cfg stm32h7_adc_priv_cfg = { static const struct stm32_adc_priv_cfg stm32mp1_adc_priv_cfg = { .regs = &stm32h7_adc_common_regs, .clk_sel = stm32h7_adc_clk_sel, - .max_clk_rate_hz = 40000000, + .max_clk_rate_hz = 36000000, .has_syscfg = HAS_VBOOSTER | HAS_ANASWVDD, .num_irqs = 2, .num_adcs = 2,