Contributors: 10
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Anton Vorontsov |
241 |
58.35% |
1 |
9.09% |
| Esben Haabendal |
133 |
32.20% |
1 |
9.09% |
| Wanlong Gao |
10 |
2.42% |
1 |
9.09% |
| Ulf Hansson |
9 |
2.18% |
1 |
9.09% |
| Grant C. Likely |
7 |
1.69% |
2 |
18.18% |
| David S. Miller |
6 |
1.45% |
1 |
9.09% |
| Tejun Heo |
3 |
0.73% |
1 |
9.09% |
| Andy Shevchenko |
2 |
0.48% |
1 |
9.09% |
| Saurabh Sengar |
1 |
0.24% |
1 |
9.09% |
| Roland Stigge |
1 |
0.24% |
1 |
9.09% |
| Total |
413 |
|
11 |
|
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* OpenFirmware bindings for the MMC-over-SPI driver
*
* Copyright (c) MontaVista Software, Inc. 2008.
*
* Author: Anton Vorontsov <avorontsov@ru.mvista.com>
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/device.h>
#include <linux/slab.h>
#include <linux/irq.h>
#include <linux/of.h>
#include <linux/of_irq.h>
#include <linux/spi/spi.h>
#include <linux/spi/mmc_spi.h>
#include <linux/mmc/core.h>
#include <linux/mmc/host.h>
/* For archs that don't support NO_IRQ (such as mips), provide a dummy value */
#ifndef NO_IRQ
#define NO_IRQ 0
#endif
MODULE_LICENSE("GPL");
struct of_mmc_spi {
int detect_irq;
struct mmc_spi_platform_data pdata;
};
static struct of_mmc_spi *to_of_mmc_spi(struct device *dev)
{
return container_of(dev->platform_data, struct of_mmc_spi, pdata);
}
static int of_mmc_spi_init(struct device *dev,
irqreturn_t (*irqhandler)(int, void *), void *mmc)
{
struct of_mmc_spi *oms = to_of_mmc_spi(dev);
return request_threaded_irq(oms->detect_irq, NULL, irqhandler,
IRQF_ONESHOT, dev_name(dev), mmc);
}
static void of_mmc_spi_exit(struct device *dev, void *mmc)
{
struct of_mmc_spi *oms = to_of_mmc_spi(dev);
free_irq(oms->detect_irq, mmc);
}
struct mmc_spi_platform_data *mmc_spi_get_pdata(struct spi_device *spi)
{
struct device *dev = &spi->dev;
struct device_node *np = dev->of_node;
struct of_mmc_spi *oms;
if (dev->platform_data || !np)
return dev->platform_data;
oms = kzalloc(sizeof(*oms), GFP_KERNEL);
if (!oms)
return NULL;
if (mmc_of_parse_voltage(np, &oms->pdata.ocr_mask) <= 0)
goto err_ocr;
oms->detect_irq = irq_of_parse_and_map(np, 0);
if (oms->detect_irq != 0) {
oms->pdata.init = of_mmc_spi_init;
oms->pdata.exit = of_mmc_spi_exit;
} else {
oms->pdata.caps |= MMC_CAP_NEEDS_POLL;
}
dev->platform_data = &oms->pdata;
return dev->platform_data;
err_ocr:
kfree(oms);
return NULL;
}
EXPORT_SYMBOL(mmc_spi_get_pdata);
void mmc_spi_put_pdata(struct spi_device *spi)
{
struct device *dev = &spi->dev;
struct device_node *np = dev->of_node;
struct of_mmc_spi *oms = to_of_mmc_spi(dev);
if (!dev->platform_data || !np)
return;
kfree(oms);
dev->platform_data = NULL;
}
EXPORT_SYMBOL(mmc_spi_put_pdata);