d2a44ae8d2
Change legacy name master to modern name host or controller. No functional changed. Signed-off-by: Yang Yingliang <yangyingliang@huawei.com> Link: https://lore.kernel.org/r/20230728093221.3312026-15-yangyingliang@huawei.com Signed-off-by: Mark Brown <broonie@kernel.org>
101 lines
2.4 KiB
C
101 lines
2.4 KiB
C
/*
|
|
* This file is subject to the terms and conditions of the GNU General Public
|
|
* License. See the file "COPYING" in the main directory of this archive
|
|
* for more details.
|
|
*
|
|
* Copyright (C) 2011, 2012 Cavium, Inc.
|
|
*/
|
|
|
|
#include <linux/platform_device.h>
|
|
#include <linux/spi/spi.h>
|
|
#include <linux/module.h>
|
|
#include <linux/io.h>
|
|
#include <linux/of.h>
|
|
|
|
#include <asm/octeon/octeon.h>
|
|
|
|
#include "spi-cavium.h"
|
|
|
|
static int octeon_spi_probe(struct platform_device *pdev)
|
|
{
|
|
void __iomem *reg_base;
|
|
struct spi_controller *host;
|
|
struct octeon_spi *p;
|
|
int err = -ENOENT;
|
|
|
|
host = spi_alloc_host(&pdev->dev, sizeof(struct octeon_spi));
|
|
if (!host)
|
|
return -ENOMEM;
|
|
p = spi_controller_get_devdata(host);
|
|
platform_set_drvdata(pdev, host);
|
|
|
|
reg_base = devm_platform_ioremap_resource(pdev, 0);
|
|
if (IS_ERR(reg_base)) {
|
|
err = PTR_ERR(reg_base);
|
|
goto fail;
|
|
}
|
|
|
|
p->register_base = reg_base;
|
|
p->sys_freq = octeon_get_io_clock_rate();
|
|
|
|
p->regs.config = 0;
|
|
p->regs.status = 0x08;
|
|
p->regs.tx = 0x10;
|
|
p->regs.data = 0x80;
|
|
|
|
host->num_chipselect = 4;
|
|
host->mode_bits = SPI_CPHA |
|
|
SPI_CPOL |
|
|
SPI_CS_HIGH |
|
|
SPI_LSB_FIRST |
|
|
SPI_3WIRE;
|
|
|
|
host->transfer_one_message = octeon_spi_transfer_one_message;
|
|
host->bits_per_word_mask = SPI_BPW_MASK(8);
|
|
host->max_speed_hz = OCTEON_SPI_MAX_CLOCK_HZ;
|
|
|
|
host->dev.of_node = pdev->dev.of_node;
|
|
err = devm_spi_register_controller(&pdev->dev, host);
|
|
if (err) {
|
|
dev_err(&pdev->dev, "register host failed: %d\n", err);
|
|
goto fail;
|
|
}
|
|
|
|
dev_info(&pdev->dev, "OCTEON SPI bus driver\n");
|
|
|
|
return 0;
|
|
fail:
|
|
spi_controller_put(host);
|
|
return err;
|
|
}
|
|
|
|
static void octeon_spi_remove(struct platform_device *pdev)
|
|
{
|
|
struct spi_controller *host = platform_get_drvdata(pdev);
|
|
struct octeon_spi *p = spi_controller_get_devdata(host);
|
|
|
|
/* Clear the CSENA* and put everything in a known state. */
|
|
writeq(0, p->register_base + OCTEON_SPI_CFG(p));
|
|
}
|
|
|
|
static const struct of_device_id octeon_spi_match[] = {
|
|
{ .compatible = "cavium,octeon-3010-spi", },
|
|
{},
|
|
};
|
|
MODULE_DEVICE_TABLE(of, octeon_spi_match);
|
|
|
|
static struct platform_driver octeon_spi_driver = {
|
|
.driver = {
|
|
.name = "spi-octeon",
|
|
.of_match_table = octeon_spi_match,
|
|
},
|
|
.probe = octeon_spi_probe,
|
|
.remove_new = octeon_spi_remove,
|
|
};
|
|
|
|
module_platform_driver(octeon_spi_driver);
|
|
|
|
MODULE_DESCRIPTION("Cavium, Inc. OCTEON SPI bus driver");
|
|
MODULE_AUTHOR("David Daney");
|
|
MODULE_LICENSE("GPL");
|