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@xxxxxxxxxxxxxxx>.
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
>From 990539486e7e311fb5dab1bf4d85d1a8973ae644 Mon Sep 17 00:00:00 2001
From: Olivier Moysan <olivier.moysan@xxxxxxxxxxx>
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@xxxxxxxxxxx>
Reviewed-by: Fabrice Gasnier <fabrice.gasnier@xxxxxxxxxxx>
Link: https://lore.kernel.org/r/20220609095234.375925-1-olivier.moysan@xxxxxxxxxxx
Cc: <Stable@xxxxxxxxxxxxxxx>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>
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,
