mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-05 10:26:42 +07:00
f78d29f166
In ancient times it was necessary to manually initialize the bus field of an spi_driver to spi_bus_type. These days this is done in spi_driver_register(), so we can drop the manual assignment. The patch was generated using the following coccinelle semantic patch: // <smpl> @@ identifier _driver; @@ struct spi_driver _driver = { .driver = { - .bus = &spi_bus_type, }, }; // </smpl> Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
142 lines
3.2 KiB
C
142 lines
3.2 KiB
C
/*
|
|
* tps65912-spi.c -- SPI access for TI TPS65912x PMIC
|
|
*
|
|
* Copyright 2011 Texas Instruments Inc.
|
|
*
|
|
* Author: Margarita Olaya Cabrera <magi@slimlogic.co.uk>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License as published by the
|
|
* Free Software Foundation; either version 2 of the License, or (at your
|
|
* option) any later version.
|
|
*
|
|
* This driver is based on wm8350 implementation.
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/moduleparam.h>
|
|
#include <linux/init.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/gpio.h>
|
|
#include <linux/spi/spi.h>
|
|
#include <linux/mfd/core.h>
|
|
#include <linux/mfd/tps65912.h>
|
|
|
|
static int tps65912_spi_write(struct tps65912 *tps65912, u8 addr,
|
|
int bytes, void *src)
|
|
{
|
|
struct spi_device *spi = tps65912->control_data;
|
|
u8 *data = (u8 *) src;
|
|
int ret;
|
|
/* bit 23 is the read/write bit */
|
|
unsigned long spi_data = 1 << 23 | addr << 15 | *data;
|
|
struct spi_transfer xfer;
|
|
struct spi_message msg;
|
|
u32 tx_buf, rx_buf;
|
|
|
|
tx_buf = spi_data;
|
|
rx_buf = 0;
|
|
|
|
xfer.tx_buf = &tx_buf;
|
|
xfer.rx_buf = NULL;
|
|
xfer.len = sizeof(unsigned long);
|
|
xfer.bits_per_word = 24;
|
|
|
|
spi_message_init(&msg);
|
|
spi_message_add_tail(&xfer, &msg);
|
|
|
|
ret = spi_sync(spi, &msg);
|
|
return ret;
|
|
}
|
|
|
|
static int tps65912_spi_read(struct tps65912 *tps65912, u8 addr,
|
|
int bytes, void *dest)
|
|
{
|
|
struct spi_device *spi = tps65912->control_data;
|
|
/* bit 23 is the read/write bit */
|
|
unsigned long spi_data = 0 << 23 | addr << 15;
|
|
struct spi_transfer xfer;
|
|
struct spi_message msg;
|
|
int ret;
|
|
u8 *data = (u8 *) dest;
|
|
u32 tx_buf, rx_buf;
|
|
|
|
tx_buf = spi_data;
|
|
rx_buf = 0;
|
|
|
|
xfer.tx_buf = &tx_buf;
|
|
xfer.rx_buf = &rx_buf;
|
|
xfer.len = sizeof(unsigned long);
|
|
xfer.bits_per_word = 24;
|
|
|
|
spi_message_init(&msg);
|
|
spi_message_add_tail(&xfer, &msg);
|
|
|
|
if (spi == NULL)
|
|
return 0;
|
|
|
|
ret = spi_sync(spi, &msg);
|
|
if (ret == 0)
|
|
*data = (u8) (rx_buf & 0xFF);
|
|
return ret;
|
|
}
|
|
|
|
static int __devinit tps65912_spi_probe(struct spi_device *spi)
|
|
{
|
|
struct tps65912 *tps65912;
|
|
|
|
tps65912 = kzalloc(sizeof(struct tps65912), GFP_KERNEL);
|
|
if (tps65912 == NULL)
|
|
return -ENOMEM;
|
|
|
|
tps65912->dev = &spi->dev;
|
|
tps65912->control_data = spi;
|
|
tps65912->read = tps65912_spi_read;
|
|
tps65912->write = tps65912_spi_write;
|
|
|
|
spi_set_drvdata(spi, tps65912);
|
|
|
|
return tps65912_device_init(tps65912);
|
|
}
|
|
|
|
static int __devexit tps65912_spi_remove(struct spi_device *spi)
|
|
{
|
|
struct tps65912 *tps65912 = spi_get_drvdata(spi);
|
|
|
|
tps65912_device_exit(tps65912);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct spi_driver tps65912_spi_driver = {
|
|
.driver = {
|
|
.name = "tps65912",
|
|
.owner = THIS_MODULE,
|
|
},
|
|
.probe = tps65912_spi_probe,
|
|
.remove = __devexit_p(tps65912_spi_remove),
|
|
};
|
|
|
|
static int __init tps65912_spi_init(void)
|
|
{
|
|
int ret;
|
|
|
|
ret = spi_register_driver(&tps65912_spi_driver);
|
|
if (ret != 0)
|
|
pr_err("Failed to register TPS65912 SPI driver: %d\n", ret);
|
|
|
|
return 0;
|
|
}
|
|
/* init early so consumer devices can complete system boot */
|
|
subsys_initcall(tps65912_spi_init);
|
|
|
|
static void __exit tps65912_spi_exit(void)
|
|
{
|
|
spi_unregister_driver(&tps65912_spi_driver);
|
|
}
|
|
module_exit(tps65912_spi_exit);
|
|
|
|
MODULE_AUTHOR("Margarita Olaya <magi@slimlogic.co.uk>");
|
|
MODULE_DESCRIPTION("SPI support for TPS65912 chip family mfd");
|
|
MODULE_LICENSE("GPL");
|