linux/drivers/mfd/sun4i-gpadc.c
Rob Herring dc0c386e09 mfd: Explicitly include correct DT includes
The DT of_device.h and of_platform.h date back to the separate
of_platform_bus_type before it as merged into the regular platform bus.
As part of that merge prepping Arm DT support 13 years ago, they
"temporarily" include each other. They also include platform_device.h
and of.h. As a result, there's a pretty much random mix of those include
files used throughout the tree. In order to detangle these headers and
replace the implicit includes with struct declarations, users need to
explicitly include the correct includes.

Signed-off-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20230714174731.4059811-1-robh@kernel.org
Signed-off-by: Lee Jones <lee@kernel.org>
2023-08-18 21:48:03 +01:00

176 lines
4.3 KiB
C

// SPDX-License-Identifier: GPL-2.0-only
/* ADC MFD core driver for sunxi platforms
*
* Copyright (c) 2016 Quentin Schulz <quentin.schulz@free-electrons.com>
*/
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/mfd/core.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
#include <linux/mfd/sun4i-gpadc.h>
#define ARCH_SUN4I_A10 0
#define ARCH_SUN5I_A13 1
#define ARCH_SUN6I_A31 2
static const struct resource adc_resources[] = {
DEFINE_RES_IRQ_NAMED(SUN4I_GPADC_IRQ_FIFO_DATA, "FIFO_DATA_PENDING"),
DEFINE_RES_IRQ_NAMED(SUN4I_GPADC_IRQ_TEMP_DATA, "TEMP_DATA_PENDING"),
};
static const struct regmap_irq sun4i_gpadc_regmap_irq[] = {
REGMAP_IRQ_REG(SUN4I_GPADC_IRQ_FIFO_DATA, 0,
SUN4I_GPADC_INT_FIFOC_TP_DATA_IRQ_EN),
REGMAP_IRQ_REG(SUN4I_GPADC_IRQ_TEMP_DATA, 0,
SUN4I_GPADC_INT_FIFOC_TEMP_IRQ_EN),
};
static const struct regmap_irq_chip sun4i_gpadc_regmap_irq_chip = {
.name = "sun4i_gpadc_irq_chip",
.status_base = SUN4I_GPADC_INT_FIFOS,
.ack_base = SUN4I_GPADC_INT_FIFOS,
.unmask_base = SUN4I_GPADC_INT_FIFOC,
.init_ack_masked = true,
.irqs = sun4i_gpadc_regmap_irq,
.num_irqs = ARRAY_SIZE(sun4i_gpadc_regmap_irq),
.num_regs = 1,
};
static struct mfd_cell sun4i_gpadc_cells[] = {
{
.name = "sun4i-a10-gpadc-iio",
.resources = adc_resources,
.num_resources = ARRAY_SIZE(adc_resources),
},
{ .name = "iio_hwmon" }
};
static struct mfd_cell sun5i_gpadc_cells[] = {
{
.name = "sun5i-a13-gpadc-iio",
.resources = adc_resources,
.num_resources = ARRAY_SIZE(adc_resources),
},
{ .name = "iio_hwmon" },
};
static struct mfd_cell sun6i_gpadc_cells[] = {
{
.name = "sun6i-a31-gpadc-iio",
.resources = adc_resources,
.num_resources = ARRAY_SIZE(adc_resources),
},
{ .name = "iio_hwmon" },
};
static const struct regmap_config sun4i_gpadc_regmap_config = {
.reg_bits = 32,
.val_bits = 32,
.reg_stride = 4,
.fast_io = true,
};
static const struct of_device_id sun4i_gpadc_of_match[] = {
{
.compatible = "allwinner,sun4i-a10-ts",
.data = (void *)ARCH_SUN4I_A10,
}, {
.compatible = "allwinner,sun5i-a13-ts",
.data = (void *)ARCH_SUN5I_A13,
}, {
.compatible = "allwinner,sun6i-a31-ts",
.data = (void *)ARCH_SUN6I_A31,
}, { /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, sun4i_gpadc_of_match);
static int sun4i_gpadc_probe(struct platform_device *pdev)
{
struct sun4i_gpadc_dev *dev;
const struct of_device_id *of_id;
const struct mfd_cell *cells;
unsigned int irq, size;
int ret;
of_id = of_match_node(sun4i_gpadc_of_match, pdev->dev.of_node);
if (!of_id)
return -EINVAL;
switch ((long)of_id->data) {
case ARCH_SUN4I_A10:
cells = sun4i_gpadc_cells;
size = ARRAY_SIZE(sun4i_gpadc_cells);
break;
case ARCH_SUN5I_A13:
cells = sun5i_gpadc_cells;
size = ARRAY_SIZE(sun5i_gpadc_cells);
break;
case ARCH_SUN6I_A31:
cells = sun6i_gpadc_cells;
size = ARRAY_SIZE(sun6i_gpadc_cells);
break;
default:
return -EINVAL;
}
dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL);
if (!dev)
return -ENOMEM;
dev->base = devm_platform_get_and_ioremap_resource(pdev, 0, NULL);
if (IS_ERR(dev->base))
return PTR_ERR(dev->base);
dev->dev = &pdev->dev;
dev_set_drvdata(dev->dev, dev);
dev->regmap = devm_regmap_init_mmio(dev->dev, dev->base,
&sun4i_gpadc_regmap_config);
if (IS_ERR(dev->regmap)) {
ret = PTR_ERR(dev->regmap);
dev_err(&pdev->dev, "failed to init regmap: %d\n", ret);
return ret;
}
/* Disable all interrupts */
regmap_write(dev->regmap, SUN4I_GPADC_INT_FIFOC, 0);
irq = platform_get_irq(pdev, 0);
ret = devm_regmap_add_irq_chip(&pdev->dev, dev->regmap, irq,
IRQF_ONESHOT, 0,
&sun4i_gpadc_regmap_irq_chip,
&dev->regmap_irqc);
if (ret) {
dev_err(&pdev->dev, "failed to add irq chip: %d\n", ret);
return ret;
}
ret = devm_mfd_add_devices(dev->dev, 0, cells, size, NULL, 0, NULL);
if (ret) {
dev_err(&pdev->dev, "failed to add MFD devices: %d\n", ret);
return ret;
}
return 0;
}
static struct platform_driver sun4i_gpadc_driver = {
.driver = {
.name = "sun4i-gpadc",
.of_match_table = sun4i_gpadc_of_match,
},
.probe = sun4i_gpadc_probe,
};
module_platform_driver(sun4i_gpadc_driver);
MODULE_DESCRIPTION("Allwinner sunxi platforms' GPADC MFD core driver");
MODULE_AUTHOR("Quentin Schulz <quentin.schulz@free-electrons.com>");
MODULE_LICENSE("GPL v2");