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author | Fabrice Gasnier <fabrice.gasnier@st.com> | 2017-07-10 15:23:59 +0200 |
---|---|---|
committer | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2017-07-15 12:26:26 +0100 |
commit | 9d9ebe64dc2e1b3cb6411c817527409fe94227b1 (patch) | |
tree | 809b6507d7a05be8e40de5fd121e21a73a9b1ed9 /drivers/iio/dac | |
parent | 0c1a1b6cba85de405cd4c656f8bd65e54724a3cb (diff) | |
download | linux-9d9ebe64dc2e1b3cb6411c817527409fe94227b1.tar.gz linux-9d9ebe64dc2e1b3cb6411c817527409fe94227b1.tar.bz2 linux-9d9ebe64dc2e1b3cb6411c817527409fe94227b1.zip |
iio: dac: stm32: add support for stm32f4
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@st.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Diffstat (limited to 'drivers/iio/dac')
-rw-r--r-- | drivers/iio/dac/stm32-dac-core.c | 38 |
1 files changed, 31 insertions, 7 deletions
diff --git a/drivers/iio/dac/stm32-dac-core.c b/drivers/iio/dac/stm32-dac-core.c index 75e48788c7ea..32701be71cf7 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 const struct regmap_config stm32_dac_regmap_cfg = { 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); |