tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
iio: adc: stm32-dfsdm: fix clock source selection
Add missing clock source selection. In case "audio" clock is provided,
it's unused currently: "dfsdm" clock is wrongly used by default.
Fixes: bed73904e76f ("IIO: ADC: add stm32 DFSDM core support")
Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com>
Acked-by: Arnaud Pouliquen <arnaud.pouliquen@st.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
authored by
Fabrice Gasnier
and committed by
Jonathan Cameron
179858ef
c278609b
+9
-1
+9
-1
drivers/iio/adc/stm32-dfsdm-core.c
+9
-1
drivers/iio/adc/stm32-dfsdm-core.c
···
83
83
{
84
84
struct dfsdm_priv *priv = container_of(dfsdm, struct dfsdm_priv, dfsdm);
85
85
struct device *dev = &priv->pdev->dev;
86
-
unsigned int clk_div = priv->spi_clk_out_div;
86
+
unsigned int clk_div = priv->spi_clk_out_div, clk_src;
87
87
int ret;
88
88
89
89
if (atomic_inc_return(&priv->n_active_ch) == 1) {
···
99
99
goto disable_clk;
100
100
}
101
101
}
102
+
103
+
/* select clock source, e.g. 0 for "dfsdm" or 1 for "audio" */
104
+
clk_src = priv->aclk ? 1 : 0;
105
+
ret = regmap_update_bits(dfsdm->regmap, DFSDM_CHCFGR1(0),
106
+
DFSDM_CHCFGR1_CKOUTSRC_MASK,
107
+
DFSDM_CHCFGR1_CKOUTSRC(clk_src));
108
+
if (ret < 0)
109
+
goto disable_aclk;
102
110
103
111
/* Output the SPI CLKOUT (if clk_div == 0 clock if OFF) */
104
112
ret = regmap_update_bits(dfsdm->regmap, DFSDM_CHCFGR1(0),