From: Fabrice Gasnier <fabrice.gasnier@st.com>
To: <jic23@kernel.org>
Cc: <linux-arm-kernel@lists.infradead.org>,
<linux-kernel@vger.kernel.org>, <mcoquelin.stm32@gmail.com>,
<alexandre.torgue@st.com>, <fabrice.gasnier@st.com>,
<linux-iio@vger.kernel.org>, <lars@metafoo.de>, <knaack.h@gmx.de>,
<pmeerw@pmeerw.net>, <benjamin.gaignard@linaro.org>,
<arnaud.pouliquen@st.com>
Subject: [PATCH 3/7] iio: adc: stm32-dfsdm: fix clock source selection
Date: Fri, 23 Feb 2018 13:50:57 +0100 [thread overview]
Message-ID: <1519390261-25453-4-git-send-email-fabrice.gasnier@st.com> (raw)
In-Reply-To: <1519390261-25453-1-git-send-email-fabrice.gasnier@st.com>
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>
---
drivers/iio/adc/stm32-dfsdm-core.c | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)
diff --git a/drivers/iio/adc/stm32-dfsdm-core.c b/drivers/iio/adc/stm32-dfsdm-core.c
index 0635f93..e50efdc 100644
--- a/drivers/iio/adc/stm32-dfsdm-core.c
+++ b/drivers/iio/adc/stm32-dfsdm-core.c
@@ -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,
--
1.9.1
next prev parent reply other threads:[~2018-02-23 12:52 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-02-23 12:50 [PATCH 0/7] iio: adc: stm32-dfsdm: misc fixes and improvements Fabrice Gasnier
2018-02-23 12:50 ` [PATCH 1/7] iio: adc: stm32-dfsdm: fix compatible data use Fabrice Gasnier
2018-02-24 12:56 ` Jonathan Cameron
2018-02-23 12:50 ` [PATCH 2/7] iio: adc: stm32-dfsdm: fix call to stop channel Fabrice Gasnier
2018-02-24 12:57 ` Jonathan Cameron
2018-02-23 12:50 ` Fabrice Gasnier [this message]
2018-02-24 12:59 ` [PATCH 3/7] iio: adc: stm32-dfsdm: fix clock source selection Jonathan Cameron
2018-02-23 12:50 ` [PATCH 4/7] iio: adc: stm32-dfsdm: fix multiple channel initialization Fabrice Gasnier
2018-02-24 13:01 ` Jonathan Cameron
2018-02-23 12:50 ` [PATCH 5/7] iio: adc: stm32-dfsdm: misc style improvements and fixes Fabrice Gasnier
2018-02-24 13:03 ` Jonathan Cameron
2018-02-27 8:21 ` Fabrice Gasnier
2018-03-03 15:09 ` Jonathan Cameron
2018-04-23 7:48 ` Fabrice Gasnier
2018-04-28 14:52 ` Jonathan Cameron
2018-02-23 12:51 ` [PATCH 6/7] iio: adc: stm32-dfsdm: add check on max filter id Fabrice Gasnier
2018-04-28 15:07 ` Jonathan Cameron
2018-02-23 12:51 ` [PATCH 7/7] iio: adc: stm32-dfsdm: add check on spi-max-frequency Fabrice Gasnier
2018-04-28 15:07 ` Jonathan Cameron
2018-02-23 13:49 ` [PATCH 0/7] iio: adc: stm32-dfsdm: misc fixes and improvements Arnaud Pouliquen
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