On 04/29/2016 01:48 PM, Ksenija Stanojevic wrote:
> Add mxs-lradc adc driver.
Commit message could use some improvement ;-)
> Signed-off-by: Ksenija Stanojevic <ksenija.stanojevic@xxxxxxxxx>
> ---
> drivers/iio/adc/Kconfig | 37 +-
> drivers/iio/adc/Makefile | 1 +
> drivers/iio/adc/mxs-lradc-adc.c | 832 ++++++++++++++++++++++++++++++++++++++++
> 3 files changed, 858 insertions(+), 12 deletions(-)
> create mode 100644 drivers/iio/adc/mxs-lradc-adc.c
>
> diff --git a/drivers/iio/adc/Kconfig b/drivers/iio/adc/Kconfig
> index 82c718c..50847b8 100644
> --- a/drivers/iio/adc/Kconfig
> +++ b/drivers/iio/adc/Kconfig
> @@ -233,6 +233,19 @@ config IMX7D_ADC
> This driver can also be built as a module. If so, the module will be
> called imx7d_adc.
>
> +config MXS_LRADC_ADC
> + tristate "Freescale i.MX23/i.MX28 LRADC ADC"
> + depends on MFD_MXS_LRADC
> + select IIO_BUFFER
> + select IIO_TRIGGERED_BUFFER
> + help
> + Say yes here to build support for the ADC functions of the
> + i.MX23/i.MX28 LRADC. This includes general-purpose ADC readings,
> + battery voltage measurement, and die temperature measurement.
> +
> + This driver can also be built as a module. If so, the module will be
> + called mxs-lradc-adc.
> +
> config LP8788_ADC
> tristate "LP8788 ADC driver"
> depends on MFD_LP8788
> @@ -306,18 +319,18 @@ config MEN_Z188_ADC
> called men_z188_adc.
>
> config MXS_LRADC
> - tristate "Freescale i.MX23/i.MX28 LRADC"
> - depends on (ARCH_MXS || COMPILE_TEST) && HAS_IOMEM
> - depends on INPUT
> - select STMP_DEVICE
> - select IIO_BUFFER
> - select IIO_TRIGGERED_BUFFER
> - help
> - Say yes here to build support for i.MX23/i.MX28 LRADC convertor
> - built into these chips.
> -
> - To compile this driver as a module, choose M here: the
> - module will be called mxs-lradc.
> + tristate "Freescale i.MX23/i.MX28 LRADC"
> + depends on (ARCH_MXS || COMPILE_TEST) && HAS_IOMEM
> + depends on INPUT
> + select STMP_DEVICE
> + select IIO_BUFFER
> + select IIO_TRIGGERED_BUFFER
> + help
> + Say yes here to build support for i.MX23/i.MX28 LRADC convertor
> + built into these chips.
> +
> + To compile this driver as a module, choose M here: the
> + module will be called mxs-lradc.
>
> config NAU7802
> tristate "Nuvoton NAU7802 ADC driver"
> diff --git a/drivers/iio/adc/Makefile b/drivers/iio/adc/Makefile
> index 0cb7921..ca7d6aa 100644
> --- a/drivers/iio/adc/Makefile
> +++ b/drivers/iio/adc/Makefile
> @@ -31,6 +31,7 @@ obj-$(CONFIG_MCP320X) += mcp320x.o
> obj-$(CONFIG_MCP3422) += mcp3422.o
> obj-$(CONFIG_MEN_Z188_ADC) += men_z188_adc.o
> obj-$(CONFIG_MXS_LRADC) += mxs-lradc.o
> +obj-$(CONFIG_MXS_LRADC_ADC) += mxs-lradc-adc.o
> obj-$(CONFIG_NAU7802) += nau7802.o
> obj-$(CONFIG_PALMAS_GPADC) += palmas_gpadc.o
> obj-$(CONFIG_QCOM_SPMI_IADC) += qcom-spmi-iadc.o
> diff --git a/drivers/iio/adc/mxs-lradc-adc.c b/drivers/iio/adc/mxs-lradc-adc.c
> new file mode 100644
> index 0000000..793c369
> --- /dev/null
> +++ b/drivers/iio/adc/mxs-lradc-adc.c
[...]
> + if (lradc->soc == IMX28_LRADC)
> + mxs_lradc_reg_clear(
> + lradc,
> + lradc->buffer_vchans << LRADC_CTRL1_LRADC_IRQ_EN_OFFSET,
> + LRADC_CTRL1);
Can you tweak the formatting here ?
if (lradc->soc == IMX28_LRADC) {
mxs_lradc_reg_clear(lradc,
lradc->buffer_vchans << LRADC_CTRL1_LRADC_IRQ_EN_OFFSET,
LRADC_CTRL1);
}
might look at least a bit less odd.
> + mxs_lradc_reg_clear(lradc, lradc->buffer_vchans, LRADC_CTRL0);
> +
> + for_each_set_bit(chan, iio->active_scan_mask, LRADC_MAX_TOTAL_CHANS) {
> + ctrl4_set |= chan << LRADC_CTRL4_LRADCSELECT_OFFSET(ofs);
> + ctrl4_clr |= LRADC_CTRL4_LRADCSELECT_MASK(ofs);
> + ctrl1_irq |= LRADC_CTRL1_LRADC_IRQ_EN(ofs);
> + mxs_lradc_reg_wrt(lradc, chan_value, LRADC_CH(ofs));
> + bitmap_set(&enable, ofs, 1);
> + ofs++;
> + }
> +
> + mxs_lradc_reg_clear(lradc, LRADC_DELAY_TRIGGER_LRADCS_MASK |
> + LRADC_DELAY_KICK, LRADC_DELAY(0));
> + mxs_lradc_reg_clear(lradc, ctrl4_clr, LRADC_CTRL4);
> + mxs_lradc_reg_set(lradc, ctrl4_set, LRADC_CTRL4);
> + mxs_lradc_reg_set(lradc, ctrl1_irq, LRADC_CTRL1);
> + mxs_lradc_reg_set(lradc, enable << LRADC_DELAY_TRIGGER_LRADCS_OFFSET,
> + LRADC_DELAY(0));
> +
> + return 0;
> +
> +err_mem:
> + mutex_unlock(&adc->lock);
> + return ret;
> +}
[...]
> +
> +static int mxs_lradc_adc_buffer_postdisable(struct iio_dev *iio)
> +{
> + struct mxs_lradc_adc *adc = iio_priv(iio);
> + struct mxs_lradc *lradc = adc->lradc;
> +
> + mxs_lradc_reg_clear(lradc, LRADC_DELAY_TRIGGER_LRADCS_MASK |
> + LRADC_DELAY_KICK, LRADC_DELAY(0));
> +
> + mxs_lradc_reg_clear(lradc, lradc->buffer_vchans, LRADC_CTRL0);
> + if (lradc->soc == IMX28_LRADC)
> + mxs_lradc_reg_clear(
> + lradc,
> + lradc->buffer_vchans << LRADC_CTRL1_LRADC_IRQ_EN_OFFSET,
> + LRADC_CTRL1);
Same here, this is horrible :)
> + kfree(adc->buffer);
> + mutex_unlock(&adc->lock);
> +
> + return 0;
> +}
[...]
Looks good otherwise :)
--
Best regards,
Marek Vasut
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