This adds support for STM32F4 Digital-To-Analog converter.
Add compatible configuration data to handle hfsel (not present
in stm32f4).
Signed-off-by: Fabrice Gasnier <fabrice.gasnier@xxxxxx>
---
drivers/iio/dac/stm32-dac-core.c | 38 +++++++++++++++++++++++++++++++-------
1 file changed, 31 insertions(+), 7 deletions(-)
diff --git a/drivers/iio/dac/stm32-dac-core.c b/drivers/iio/dac/stm32-dac-core.c
index 75e4878..32701be 100644
--- a/drivers/iio/dac/stm32-dac-core.c
+++ b/drivers/iio/dac/stm32-dac-core.c
@@ -42,6 +42,14 @@ struct stm32_dac_priv {
struct stm32_dac_common common;
};
+/**
+ * struct stm32_dac_cfg - DAC configuration
+ * @has_hfsel: DAC has high frequency control
+ */
+struct stm32_dac_cfg {
+ bool has_hfsel;
+};
+
static struct stm32_dac_priv *to_stm32_dac_priv(struct stm32_dac_common *com)
{
return container_of(com, struct stm32_dac_priv, common);
@@ -57,6 +65,7 @@ static struct stm32_dac_priv *to_stm32_dac_priv(struct stm32_dac_common *com)
static int stm32_dac_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
+ const struct stm32_dac_cfg *cfg;
struct stm32_dac_priv *priv;
struct regmap *regmap;
struct resource *res;
@@ -69,6 +78,8 @@ static int stm32_dac_probe(struct platform_device *pdev)
priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
+ cfg = (const struct stm32_dac_cfg *)
+ of_match_device(dev->driver->of_match_table, dev)->data;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
mmio = devm_ioremap_resource(dev, res);
@@ -121,12 +132,16 @@ static int stm32_dac_probe(struct platform_device *pdev)
reset_control_deassert(priv->rst);
}
- /* When clock speed is higher than 80MHz, set HFSEL */
- priv->common.hfsel = (clk_get_rate(priv->pclk) > 80000000UL);
- ret = regmap_update_bits(regmap, STM32_DAC_CR, STM32H7_DAC_CR_HFSEL,
- priv->common.hfsel ? STM32H7_DAC_CR_HFSEL : 0);
- if (ret)
- goto err_pclk;
+ if (cfg && cfg->has_hfsel) {
+ /* When clock speed is higher than 80MHz, set HFSEL */
+ priv->common.hfsel = (clk_get_rate(priv->pclk) > 80000000UL);
+ ret = regmap_update_bits(regmap, STM32_DAC_CR,
+ STM32H7_DAC_CR_HFSEL,
+ priv->common.hfsel ?
+ STM32H7_DAC_CR_HFSEL : 0);
+ if (ret)
+ goto err_pclk;
+ }
platform_set_drvdata(pdev, &priv->common);
@@ -158,8 +173,17 @@ static int stm32_dac_remove(struct platform_device *pdev)
return 0;
}
+static const struct stm32_dac_cfg stm32h7_dac_cfg = {
+ .has_hfsel = true,
+};
+
static const struct of_device_id stm32_dac_of_match[] = {
- { .compatible = "st,stm32h7-dac-core", },
+ {
+ .compatible = "st,stm32f4-dac-core",
+ }, {
+ .compatible = "st,stm32h7-dac-core",
+ .data = (void *)&stm32h7_dac_cfg,
+ },
{},
};
MODULE_DEVICE_TABLE(of, stm32_dac_of_match);
--
1.9.1
--
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