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Commit 179858ef authored by Fabrice Gasnier's avatar Fabrice Gasnier Committed by Jonathan Cameron
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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: bed73904 ("IIO: ADC: add stm32 DFSDM core support")

Signed-off-by: default avatarFabrice Gasnier <fabrice.gasnier@st.com>
Acked-by: default avatarArnaud Pouliquen <arnaud.pouliquen@st.com>
Signed-off-by: default avatarJonathan Cameron <Jonathan.Cameron@huawei.com>
parent c278609b

drivers/iio/adc/stm32-dfsdm-core.c

+9 −1
Original line number Diff line number Diff line
@@ -83,7 +83,7 @@ int stm32_dfsdm_start_dfsdm(struct stm32_dfsdm *dfsdm) 
{

	struct dfsdm_priv *priv = container_of(dfsdm, struct dfsdm_priv, dfsdm);

	struct device *dev = &priv->pdev->dev;

	unsigned int clk_div = priv->spi_clk_out_div;

	unsigned int clk_div = priv->spi_clk_out_div, clk_src;

	int ret;



	if (atomic_inc_return(&priv->n_active_ch) == 1) {
@@ -100,6 +100,14 @@ int stm32_dfsdm_start_dfsdm(struct stm32_dfsdm *dfsdm) 
			}

		}



		/* select clock source, e.g. 0 for "dfsdm" or 1 for "audio" */

		clk_src = priv->aclk ? 1 : 0;

		ret = regmap_update_bits(dfsdm->regmap, DFSDM_CHCFGR1(0),

					 DFSDM_CHCFGR1_CKOUTSRC_MASK,

					 DFSDM_CHCFGR1_CKOUTSRC(clk_src));

		if (ret < 0)

			goto disable_aclk;



		/* Output the SPI CLKOUT (if clk_div == 0 clock if OFF) */

		ret = regmap_update_bits(dfsdm->regmap, DFSDM_CHCFGR1(0),

					 DFSDM_CHCFGR1_CKOUTDIV_MASK,