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authorFabrice Gasnier <fabrice.gasnier@st.com>2018-05-02 15:05:23 +0200
committerJonathan Cameron <Jonathan.Cameron@huawei.com>2018-05-12 10:22:17 +0100
commite2fad7450306df281d21111620124954d4cb2cd9 (patch)
tree632576daaff0f03978127ea2eee07b7f8d1004bc /drivers/iio
parentcbf73ae59bee340f423479eb48aef9a0efdd8010 (diff)
iio: adc: stm32-dfsdm: Add support for stm32mp1
Add support for DFSDM (Digital Filter For Sigma Delta Modulators) to STM32MP1. This variant is close to STM32H7 DFSDM, it implements 6 filter instances. Registers map is also increased. Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com> Reviewed-by: Rob Herring <robh@kernel.org> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Diffstat (limited to 'drivers/iio')
-rw-r--r--drivers/iio/adc/stm32-dfsdm-core.c21
1 files changed, 21 insertions, 0 deletions
diff --git a/drivers/iio/adc/stm32-dfsdm-core.c b/drivers/iio/adc/stm32-dfsdm-core.c
index 1d0d8238d9b5..bf089f5d6225 100644
--- a/drivers/iio/adc/stm32-dfsdm-core.c
+++ b/drivers/iio/adc/stm32-dfsdm-core.c
@@ -25,6 +25,8 @@ struct stm32_dfsdm_dev_data {
#define STM32H7_DFSDM_NUM_FILTERS 4
#define STM32H7_DFSDM_NUM_CHANNELS 8
+#define STM32MP1_DFSDM_NUM_FILTERS 6
+#define STM32MP1_DFSDM_NUM_CHANNELS 8
static bool stm32_dfsdm_volatile_reg(struct device *dev, unsigned int reg)
{
@@ -61,6 +63,21 @@ static const struct stm32_dfsdm_dev_data stm32h7_dfsdm_data = {
.regmap_cfg = &stm32h7_dfsdm_regmap_cfg,
};
+static const struct regmap_config stm32mp1_dfsdm_regmap_cfg = {
+ .reg_bits = 32,
+ .val_bits = 32,
+ .reg_stride = sizeof(u32),
+ .max_register = 0x7fc,
+ .volatile_reg = stm32_dfsdm_volatile_reg,
+ .fast_io = true,
+};
+
+static const struct stm32_dfsdm_dev_data stm32mp1_dfsdm_data = {
+ .num_filters = STM32MP1_DFSDM_NUM_FILTERS,
+ .num_channels = STM32MP1_DFSDM_NUM_CHANNELS,
+ .regmap_cfg = &stm32mp1_dfsdm_regmap_cfg,
+};
+
struct dfsdm_priv {
struct platform_device *pdev; /* platform device */
@@ -248,6 +265,10 @@ static const struct of_device_id stm32_dfsdm_of_match[] = {
.compatible = "st,stm32h7-dfsdm",
.data = &stm32h7_dfsdm_data,
},
+ {
+ .compatible = "st,stm32mp1-dfsdm",
+ .data = &stm32mp1_dfsdm_data,
+ },
{}
};
MODULE_DEVICE_TABLE(of, stm32_dfsdm_of_match);