On 15/09/16 13:44, Quentin Schulz wrote: > The Allwinner SoCs all have an ADC that can also act as a touchscreen > controller and a thermal sensor. This patch adds the ADC driver which is > based on the MFD for the same SoCs ADC. > > This also registers the thermal adc channel in the iio map array so > iio_hwmon could use it without modifying the Device Tree. This registers > the driver in the thermal framework. > > This driver probes on three different platform_device_id to take into > account slight differences (registers bit and temperature computation) > between Allwinner SoCs ADCs. > > Signed-off-by: Quentin Schulz <quentin.schulz@xxxxxxxxxxxxxxxxxx> > Acked-by: Maxime Ripard <maxime.ripard@xxxxxxxxxxxxxxxxxx> > Acked-by: Jonathan Cameron <jic23@xxxxxxxxxx> Hi Lee, As you applied the MFD part of this series, could you pick this up as well? Thanks, Jonathan > --- > > v6: > - remove useless member (regs) from sun4i_gpadc_dev structure, > - rename sun4i_gpadc_dev structure to sun4i_gpadc_iio, > - remove regmap_update_bits used to disable hardware interrupts, it is already > handled by devm functions, > > v5: > - correct mail address, > - correct several typos, > - move from const to static for sunxi_gpadc_chan_select functions, > - rename soc_specific struct to gpadc_data, > - rename soc_specific field to data in sun4i_gpadc_dev, > - return error code from regmap_write in case of failure in read_raws, > - share if condition in IIO_CHAN_INFO_RAW case, > - add comment on why we use parent device for registering in thermal, > - reordering remove function, > > v4: > - rename files and variables from sunxi* to sun4i*, > - shorten sunxi_gpadc_soc_specific structure to soc_specific, > - factorize sysfs ADC and temp read_raws, > - use cached values when read_raw times out (except before a first value > is gotten), > - remove mutex locks and unlocks from runtime_pm functions, > - factorize irq initializations, > - initialize temp_data and fifo_data values to -1 (error value), > - "impersonate" MFD to register in thermal framework, > - deactivate hardware interrupts one by one when probe fails or when > removing driver instead of blindly deactivating all hardware interrupts, > - selects THERMAL_OF in Kconfig, > > v3: > - correct wrapping, > - add comment about thermal sensor inner working, > - move defines in mfd header, > - use structure to define SoC specific registers or behaviour, > - attach this structure to the device according to of_device_id of the > platform device, > - use new mutex instead of iio_dev mutex, > - use atomic flags to avoid race between request_irq and disable_irq in > probe, > - switch from processed value to raw, offset and scale values for > temperature ADC channel, > - remove faulty sentinel in iio_chan_spec array, > - add pm_runtime support, > - register thermal sensor in thermal framework (forgotten since the > beginning whereas it is present in current sun4i-ts driver), > - remove useless ret variables to store return value of regmap_reads, > - move comments on thermal sensor acquisition period in code instead of > header, > - adding goto label to unregister iio_map_array when failing to register > iio_dev, > > v2: > - add SUNXI_GPADC_ prefixes for defines, > - correct typo in Kconfig, > - reorder alphabetically includes, makefile, > - add license header, > - fix architecture variations not being handled in interrupt handlers or > read raw functions, > - fix unability to return negative values from thermal sensor, > - add gotos to reduce code repetition, > - fix irq variable being unsigned int instead of int, > - remove useless dev_err and dev_info, > - deactivate all interrupts if probe fails, > - fix iio_device_register on NULL variable, > - deactivate ADC in the IP when probe fails or when removing driver, > > drivers/iio/adc/Kconfig | 13 + > drivers/iio/adc/Makefile | 1 + > drivers/iio/adc/sun4i-gpadc-iio.c | 522 ++++++++++++++++++++++++++++++++++++++ > 3 files changed, 536 insertions(+) > create mode 100644 drivers/iio/adc/sun4i-gpadc-iio.c > > diff --git a/drivers/iio/adc/Kconfig b/drivers/iio/adc/Kconfig > index 25378c5..ea36a4f 100644 > --- a/drivers/iio/adc/Kconfig > +++ b/drivers/iio/adc/Kconfig > @@ -384,6 +384,19 @@ config ROCKCHIP_SARADC > To compile this driver as a module, choose M here: the > module will be called rockchip_saradc. > > +config SUN4I_GPADC > + tristate "Support for the Allwinner SoCs GPADC" > + depends on IIO > + depends on MFD_SUN4I_GPADC > + select THERMAL_OF > + help > + Say yes here to build support for Allwinner (A10, A13 and A31) SoCs > + GPADC. This ADC provides 4 channels which can be used as an ADC or as > + a touchscreen input and one channel for thermal sensor. > + > + To compile this driver as a module, choose M here: the module will be > + called sun4i-gpadc-iio. > + > config TI_ADC081C > tristate "Texas Instruments ADC081C/ADC101C/ADC121C family" > depends on I2C > diff --git a/drivers/iio/adc/Makefile b/drivers/iio/adc/Makefile > index 38638d4..204372d 100644 > --- a/drivers/iio/adc/Makefile > +++ b/drivers/iio/adc/Makefile > @@ -37,6 +37,7 @@ obj-$(CONFIG_PALMAS_GPADC) += palmas_gpadc.o > obj-$(CONFIG_QCOM_SPMI_IADC) += qcom-spmi-iadc.o > obj-$(CONFIG_QCOM_SPMI_VADC) += qcom-spmi-vadc.o > obj-$(CONFIG_ROCKCHIP_SARADC) += rockchip_saradc.o > +obj-$(CONFIG_SUN4I_GPADC) += sun4i-gpadc-iio.o > obj-$(CONFIG_TI_ADC081C) += ti-adc081c.o > obj-$(CONFIG_TI_ADC0832) += ti-adc0832.o > obj-$(CONFIG_TI_ADC128S052) += ti-adc128s052.o > diff --git a/drivers/iio/adc/sun4i-gpadc-iio.c b/drivers/iio/adc/sun4i-gpadc-iio.c > new file mode 100644 > index 0000000..e2c5ba8 > --- /dev/null > +++ b/drivers/iio/adc/sun4i-gpadc-iio.c > @@ -0,0 +1,522 @@ > +/* ADC driver for sunxi platforms' (A10, A13 and A31) GPADC > + * > + * Copyright (c) 2016 Quentin Schulz <quentin.schulz@xxxxxxxxxxxxxxxxxx> > + * > + * This program is free software; you can redistribute it and/or modify it under > + * the terms of the GNU General Public License version 2 as published by the > + * Free Software Foundation. > + * > + * The Allwinner SoCs all have an ADC that can also act as a touchscreen > + * controller and a thermal sensor. > + * The thermal sensor works only when the ADC acts as a touchscreen controller > + * and is configured to throw an interrupt every fixed periods of time (let say > + * every X seconds). > + * One would be tempted to disable the IP on the hardware side rather than > + * disabling interrupts to save some power but that resets the internal clock of > + * the IP, resulting in having to wait X seconds every time we want to read the > + * value of the thermal sensor. > + * This is also the reason of using autosuspend in pm_runtime. If there was no > + * autosuspend, the thermal sensor would need X seconds after every > + * pm_runtime_get_sync to get a value from the ADC. The autosuspend allows the > + * thermal sensor to be requested again in a certain time span before it gets > + * shutdown for not being used. > + */ > + > +#include <linux/completion.h> > +#include <linux/interrupt.h> > +#include <linux/io.h> > +#include <linux/module.h> > +#include <linux/of.h> > +#include <linux/of_device.h> > +#include <linux/platform_device.h> > +#include <linux/pm_runtime.h> > +#include <linux/regmap.h> > +#include <linux/thermal.h> > + > +#include <linux/iio/iio.h> > +#include <linux/iio/driver.h> > +#include <linux/iio/machine.h> > +#include <linux/mfd/sun4i-gpadc.h> > + > +static unsigned int sun4i_gpadc_chan_select(unsigned int chan) > +{ > + return SUN4I_GPADC_CTRL1_ADC_CHAN_SELECT(chan); > +} > + > +static unsigned int sun6i_gpadc_chan_select(unsigned int chan) > +{ > + return SUN6I_GPADC_CTRL1_ADC_CHAN_SELECT(chan); > +} > + > +struct gpadc_data { > + int temp_offset; > + int temp_scale; > + unsigned int tp_mode_en; > + unsigned int tp_adc_select; > + unsigned int (*adc_chan_select)(unsigned int chan); > +}; > + > +static const struct gpadc_data sun4i_gpadc_data = { > + .temp_offset = -1932, > + .temp_scale = 133, > + .tp_mode_en = SUN4I_GPADC_CTRL1_TP_MODE_EN, > + .tp_adc_select = SUN4I_GPADC_CTRL1_TP_ADC_SELECT, > + .adc_chan_select = &sun4i_gpadc_chan_select, > +}; > + > +static const struct gpadc_data sun5i_gpadc_data = { > + .temp_offset = -1447, > + .temp_scale = 100, > + .tp_mode_en = SUN4I_GPADC_CTRL1_TP_MODE_EN, > + .tp_adc_select = SUN4I_GPADC_CTRL1_TP_ADC_SELECT, > + .adc_chan_select = &sun4i_gpadc_chan_select, > +}; > + > +static const struct gpadc_data sun6i_gpadc_data = { > + .temp_offset = -1623, > + .temp_scale = 167, > + .tp_mode_en = SUN6I_GPADC_CTRL1_TP_MODE_EN, > + .tp_adc_select = SUN6I_GPADC_CTRL1_TP_ADC_SELECT, > + .adc_chan_select = &sun6i_gpadc_chan_select, > +}; > + > +struct sun4i_gpadc_iio { > + struct iio_dev *indio_dev; > + struct completion completion; > + int temp_data; > + u32 adc_data; > + struct regmap *regmap; > + unsigned int fifo_data_irq; > + atomic_t ignore_fifo_data_irq; > + unsigned int temp_data_irq; > + atomic_t ignore_temp_data_irq; > + const struct gpadc_data *data; > + /* prevents concurrent reads of temperature and ADC */ > + struct mutex mutex; > +}; > + > +#define SUN4I_GPADC_ADC_CHANNEL(_channel, _name) { \ > + .type = IIO_VOLTAGE, \ > + .indexed = 1, \ > + .channel = _channel, \ > + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \ > + .datasheet_name = _name, \ > +} > + > +static struct iio_map sun4i_gpadc_hwmon_maps[] = { > + { > + .adc_channel_label = "temp_adc", > + .consumer_dev_name = "iio_hwmon.0", > + }, > + { /* sentinel */ }, > +}; > + > +static const struct iio_chan_spec sun4i_gpadc_channels[] = { > + SUN4I_GPADC_ADC_CHANNEL(0, "adc_chan0"), > + SUN4I_GPADC_ADC_CHANNEL(1, "adc_chan1"), > + SUN4I_GPADC_ADC_CHANNEL(2, "adc_chan2"), > + SUN4I_GPADC_ADC_CHANNEL(3, "adc_chan3"), > + { > + .type = IIO_TEMP, > + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | > + BIT(IIO_CHAN_INFO_SCALE) | > + BIT(IIO_CHAN_INFO_OFFSET), > + .datasheet_name = "temp_adc", > + }, > +}; > + > +static int sun4i_gpadc_read(struct iio_dev *indio_dev, int channel, int *val, > + unsigned int irq) > +{ > + struct sun4i_gpadc_iio *info = iio_priv(indio_dev); > + int ret = 0; > + > + pm_runtime_get_sync(indio_dev->dev.parent); > + mutex_lock(&info->mutex); > + > + reinit_completion(&info->completion); > + > + ret = regmap_write(info->regmap, SUN4I_GPADC_INT_FIFOC, > + SUN4I_GPADC_INT_FIFOC_TP_FIFO_TRIG_LEVEL(1) | > + SUN4I_GPADC_INT_FIFOC_TP_FIFO_FLUSH); > + if (ret) > + return ret; > + > + if (irq == info->fifo_data_irq) { > + ret = regmap_write(info->regmap, SUN4I_GPADC_CTRL1, > + info->data->tp_mode_en | > + info->data->tp_adc_select | > + info->data->adc_chan_select(channel)); > + } else { > + /* > + * The temperature sensor returns valid data only when the ADC > + * operates in touchscreen mode. > + */ > + ret = regmap_write(info->regmap, SUN4I_GPADC_CTRL1, > + info->data->tp_mode_en); > + } > + > + if (ret) > + return ret; > + > + enable_irq(irq); > + > + if (!wait_for_completion_timeout(&info->completion, > + msecs_to_jiffies(100))) { > + if ((irq == info->fifo_data_irq && info->adc_data == -1) || > + (irq == info->temp_data_irq && info->temp_data == -1)) { > + ret = -ETIMEDOUT; > + goto out; > + } > + } > + > + if (irq == info->fifo_data_irq) > + *val = info->adc_data; > + else > + *val = info->temp_data; > + > + ret = 0; > + > +out: > + disable_irq(irq); > + mutex_unlock(&info->mutex); > + pm_runtime_mark_last_busy(indio_dev->dev.parent); > + pm_runtime_put_autosuspend(indio_dev->dev.parent); > + > + return ret; > +} > + > +static int sun4i_gpadc_adc_read(struct iio_dev *indio_dev, int channel, > + int *val) > +{ > + struct sun4i_gpadc_iio *info = iio_priv(indio_dev); > + > + return sun4i_gpadc_read(indio_dev, channel, val, info->fifo_data_irq); > +} > + > +static int sun4i_gpadc_temp_read(struct iio_dev *indio_dev, int *val) > +{ > + struct sun4i_gpadc_iio *info = iio_priv(indio_dev); > + > + return sun4i_gpadc_read(indio_dev, 0, val, info->temp_data_irq); > +} > + > +static int sun4i_gpadc_temp_offset(struct iio_dev *indio_dev, int *val) > +{ > + struct sun4i_gpadc_iio *info = iio_priv(indio_dev); > + > + *val = info->data->temp_offset; > + > + return 0; > +} > + > +static int sun4i_gpadc_temp_scale(struct iio_dev *indio_dev, int *val) > +{ > + struct sun4i_gpadc_iio *info = iio_priv(indio_dev); > + > + *val = info->data->temp_scale; > + > + return 0; > +} > + > +static int sun4i_gpadc_read_raw(struct iio_dev *indio_dev, > + struct iio_chan_spec const *chan, int *val, > + int *val2, long mask) > +{ > + int ret; > + > + switch (mask) { > + case IIO_CHAN_INFO_OFFSET: > + ret = sun4i_gpadc_temp_offset(indio_dev, val); > + if (ret) > + return ret; > + > + return IIO_VAL_INT; > + case IIO_CHAN_INFO_RAW: > + if (chan->type == IIO_VOLTAGE) > + ret = sun4i_gpadc_adc_read(indio_dev, chan->channel, > + val); > + else > + ret = sun4i_gpadc_temp_read(indio_dev, val); > + > + if (ret) > + return ret; > + > + return IIO_VAL_INT; > + case IIO_CHAN_INFO_SCALE: > + ret = sun4i_gpadc_temp_scale(indio_dev, val); > + if (ret) > + return ret; > + > + return IIO_VAL_INT; > + default: > + return -EINVAL; > + } > + > + return -EINVAL; > +} > + > +static const struct iio_info sun4i_gpadc_iio_info = { > + .read_raw = sun4i_gpadc_read_raw, > + .driver_module = THIS_MODULE, > +}; > + > +static irqreturn_t sun4i_gpadc_temp_data_irq_handler(int irq, void *dev_id) > +{ > + struct sun4i_gpadc_iio *info = dev_id; > + > + if (atomic_read(&info->ignore_temp_data_irq)) > + return IRQ_HANDLED; > + > + if (!regmap_read(info->regmap, SUN4I_GPADC_TEMP_DATA, &info->temp_data)) > + complete(&info->completion); > + > + return IRQ_HANDLED; > +} > + > +static irqreturn_t sun4i_gpadc_fifo_data_irq_handler(int irq, void *dev_id) > +{ > + struct sun4i_gpadc_iio *info = dev_id; > + > + if (atomic_read(&info->ignore_fifo_data_irq)) > + return IRQ_HANDLED; > + > + if (!regmap_read(info->regmap, SUN4I_GPADC_DATA, &info->adc_data)) > + complete(&info->completion); > + > + return IRQ_HANDLED; > +} > + > +static int sun4i_gpadc_runtime_suspend(struct device *dev) > +{ > + struct sun4i_gpadc_iio *info = iio_priv(dev_get_drvdata(dev)); > + > + /* Disable the ADC on IP */ > + regmap_write(info->regmap, SUN4I_GPADC_CTRL1, 0); > + /* Disable temperature sensor on IP */ > + regmap_write(info->regmap, SUN4I_GPADC_TPR, 0); > + > + return 0; > +} > + > +static int sun4i_gpadc_runtime_resume(struct device *dev) > +{ > + struct sun4i_gpadc_iio *info = iio_priv(dev_get_drvdata(dev)); > + > + /* clkin = 6MHz */ > + regmap_write(info->regmap, SUN4I_GPADC_CTRL0, > + SUN4I_GPADC_CTRL0_ADC_CLK_DIVIDER(2) | > + SUN4I_GPADC_CTRL0_FS_DIV(7) | > + SUN4I_GPADC_CTRL0_T_ACQ(63)); > + regmap_write(info->regmap, SUN4I_GPADC_CTRL1, info->data->tp_mode_en); > + regmap_write(info->regmap, SUN4I_GPADC_CTRL3, > + SUN4I_GPADC_CTRL3_FILTER_EN | > + SUN4I_GPADC_CTRL3_FILTER_TYPE(1)); > + /* period = SUN4I_GPADC_TPR_TEMP_PERIOD * 256 * 16 / clkin; ~1.3s */ > + regmap_write(info->regmap, SUN4I_GPADC_TPR, > + SUN4I_GPADC_TPR_TEMP_ENABLE | > + SUN4I_GPADC_TPR_TEMP_PERIOD(1953)); > + > + return 0; > +} > + > +static int sun4i_gpadc_get_temp(void *data, int *temp) > +{ > + struct sun4i_gpadc_iio *info = (struct sun4i_gpadc_iio *)data; > + int val, scale, offset; > + > + /* If reading temperature times out, take stored previous value. */ > + if (sun4i_gpadc_temp_read(info->indio_dev, &val)) > + val = info->temp_data; > + sun4i_gpadc_temp_scale(info->indio_dev, &scale); > + sun4i_gpadc_temp_offset(info->indio_dev, &offset); > + > + *temp = (val + offset) * scale; > + > + return 0; > +} > + > +static const struct thermal_zone_of_device_ops sun4i_ts_tz_ops = { > + .get_temp = &sun4i_gpadc_get_temp, > +}; > + > +static const struct dev_pm_ops sun4i_gpadc_pm_ops = { > + .runtime_suspend = &sun4i_gpadc_runtime_suspend, > + .runtime_resume = &sun4i_gpadc_runtime_resume, > +}; > + > +static int sun4i_irq_init(struct platform_device *pdev, const char *name, > + irq_handler_t handler, const char *devname, > + unsigned int *irq, atomic_t *atomic) > +{ > + int ret; > + struct sun4i_gpadc_dev *mfd_dev = dev_get_drvdata(pdev->dev.parent); > + struct sun4i_gpadc_iio *info = iio_priv(dev_get_drvdata(&pdev->dev)); > + > + /* > + * Once the interrupt is activated, the IP continuously performs > + * conversions thus throws interrupts. The interrupt is activated right > + * after being requested but we want to control when these interrupts > + * occur thus we disable it right after being requested. However, an > + * interrupt might occur between these two instructions and we have to > + * make sure that does not happen, by using atomic flags. We set the > + * flag before requesting the interrupt and unset it right after > + * disabling the interrupt. When an interrupt occurs between these two > + * instructions, reading the atomic flag will tell us to ignore the > + * interrupt. > + */ > + atomic_set(atomic, 1); > + > + *irq = platform_get_irq_byname(pdev, name); > + if (*irq < 0) { > + dev_err(&pdev->dev, "no %s interrupt registered\n", name); > + return *irq; > + } > + > + *irq = regmap_irq_get_virq(mfd_dev->regmap_irqc, *irq); > + ret = devm_request_any_context_irq(&pdev->dev, *irq, handler, 0, > + devname, info); > + if (ret < 0) { > + dev_err(&pdev->dev, "could not request %s interrupt: %d\n", > + name, ret); > + return ret; > + } > + > + disable_irq(*irq); > + atomic_set(atomic, 0); > + > + return 0; > +} > + > +static int sun4i_gpadc_probe(struct platform_device *pdev) > +{ > + struct sun4i_gpadc_iio *info; > + struct iio_dev *indio_dev; > + int ret; > + struct sun4i_gpadc_dev *sun4i_gpadc_dev; > + struct thermal_zone_device *tzd; > + > + sun4i_gpadc_dev = dev_get_drvdata(pdev->dev.parent); > + > + indio_dev = devm_iio_device_alloc(&pdev->dev, sizeof(*info)); > + if (!indio_dev) > + return -ENOMEM; > + > + info = iio_priv(indio_dev); > + platform_set_drvdata(pdev, indio_dev); > + > + mutex_init(&info->mutex); > + info->regmap = sun4i_gpadc_dev->regmap; > + info->indio_dev = indio_dev; > + info->temp_data = -1; > + info->adc_data = -1; > + init_completion(&info->completion); > + indio_dev->name = dev_name(&pdev->dev); > + indio_dev->dev.parent = &pdev->dev; > + indio_dev->dev.of_node = pdev->dev.of_node; > + indio_dev->info = &sun4i_gpadc_iio_info; > + indio_dev->modes = INDIO_DIRECT_MODE; > + indio_dev->num_channels = ARRAY_SIZE(sun4i_gpadc_channels); > + indio_dev->channels = sun4i_gpadc_channels; > + > + info->data = (struct gpadc_data *)platform_get_device_id(pdev)->driver_data; > + > + /* > + * This driver is a child of an MFD which has a node in the DT but not > + * its children. Therefore, the resulting devices of this driver do not > + * have an of_node variable. > + * However, its parent (the MFD driver) has an of_node variable and > + * since devm_thermal_zone_of_sensor_register uses its first argument to > + * match the phandle defined in the node of the thermal driver with the > + * of_node of the device passed as first argument and the third argument > + * to call ops from thermal_zone_of_device_ops, the solution is to use > + * the parent device as first argument to match the phandle with its > + * of_node, and the device from this driver as third argument to return > + * the temperature. > + */ > + tzd = devm_thermal_zone_of_sensor_register(pdev->dev.parent, 0, info, > + &sun4i_ts_tz_ops); > + if (IS_ERR(tzd)) { > + dev_err(&pdev->dev, "could not register thermal sensor: %ld\n", > + PTR_ERR(tzd)); > + return PTR_ERR(tzd); > + } > + > + pm_runtime_set_autosuspend_delay(&pdev->dev, > + SUN4I_GPADC_AUTOSUSPEND_DELAY); > + pm_runtime_use_autosuspend(&pdev->dev); > + pm_runtime_set_suspended(&pdev->dev); > + pm_runtime_enable(&pdev->dev); > + > + ret = sun4i_irq_init(pdev, "TEMP_DATA_PENDING", > + sun4i_gpadc_temp_data_irq_handler, "temp_data", > + &info->temp_data_irq, &info->ignore_temp_data_irq); > + if (ret < 0) > + goto err; > + > + ret = sun4i_irq_init(pdev, "FIFO_DATA_PENDING", > + sun4i_gpadc_fifo_data_irq_handler, "fifo_data", > + &info->fifo_data_irq, &info->ignore_fifo_data_irq); > + if (ret < 0) > + goto err; > + > + ret = iio_map_array_register(indio_dev, sun4i_gpadc_hwmon_maps); > + if (ret < 0) { > + dev_err(&pdev->dev, "failed to register iio map array\n"); > + goto err; > + } > + > + ret = iio_device_register(indio_dev); > + if (ret < 0) { > + dev_err(&pdev->dev, "could not register the device\n"); > + goto err_map; > + } > + > + return 0; > + > +err_map: > + iio_map_array_unregister(indio_dev); > + > +err: > + pm_runtime_put(&pdev->dev); > + pm_runtime_disable(&pdev->dev); > + > + return ret; > +} > + > +static int sun4i_gpadc_remove(struct platform_device *pdev) > +{ > + struct sun4i_gpadc_iio *info; > + struct iio_dev *indio_dev = platform_get_drvdata(pdev); > + > + pm_runtime_put(&pdev->dev); > + pm_runtime_disable(&pdev->dev); > + info = iio_priv(indio_dev); > + iio_map_array_unregister(indio_dev); > + iio_device_unregister(indio_dev); > + > + return 0; > +} > + > +static const struct platform_device_id sun4i_gpadc_id[] = { > + { "sun4i-a10-gpadc-iio", (kernel_ulong_t)&sun4i_gpadc_data }, > + { "sun5i-a13-gpadc-iio", (kernel_ulong_t)&sun5i_gpadc_data }, > + { "sun6i-a31-gpadc-iio", (kernel_ulong_t)&sun6i_gpadc_data }, > + { /* sentinel */ }, > +}; > + > +static struct platform_driver sun4i_gpadc_driver = { > + .driver = { > + .name = "sun4i-gpadc-iio", > + .pm = &sun4i_gpadc_pm_ops, > + }, > + .id_table = sun4i_gpadc_id, > + .probe = sun4i_gpadc_probe, > + .remove = sun4i_gpadc_remove, > +}; > + > +module_platform_driver(sun4i_gpadc_driver); > + > +MODULE_DESCRIPTION("ADC driver for sunxi platforms"); > +MODULE_AUTHOR("Quentin Schulz <quentin.schulz@xxxxxxxxxxxxxxxxxx>"); > +MODULE_LICENSE("GPL v2"); > -- To unsubscribe from this list: send the line "unsubscribe linux-iio" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html