mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-23 04:34:11 +08:00
568852b700
Add the missing clk_disable_unprepare() before return in the probe error handling case and remove. Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com> Signed-off-by: Mark Brown <broonie@kernel.org>
121 lines
2.6 KiB
C
121 lines
2.6 KiB
C
/*
|
|
* Cavium ThunderX SPI driver.
|
|
*
|
|
* Copyright (C) 2016 Cavium Inc.
|
|
* Authors: Jan Glauber <jglauber@cavium.com>
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/pci.h>
|
|
#include <linux/spi/spi.h>
|
|
|
|
#include "spi-cavium.h"
|
|
|
|
#define DRV_NAME "spi-thunderx"
|
|
|
|
#define SYS_FREQ_DEFAULT 700000000 /* 700 Mhz */
|
|
|
|
static int thunderx_spi_probe(struct pci_dev *pdev,
|
|
const struct pci_device_id *ent)
|
|
{
|
|
struct device *dev = &pdev->dev;
|
|
struct spi_master *master;
|
|
struct octeon_spi *p;
|
|
int ret;
|
|
|
|
master = spi_alloc_master(dev, sizeof(struct octeon_spi));
|
|
if (!master)
|
|
return -ENOMEM;
|
|
|
|
p = spi_master_get_devdata(master);
|
|
|
|
ret = pcim_enable_device(pdev);
|
|
if (ret)
|
|
goto error;
|
|
|
|
ret = pci_request_regions(pdev, DRV_NAME);
|
|
if (ret)
|
|
goto error;
|
|
|
|
p->register_base = pcim_iomap(pdev, 0, pci_resource_len(pdev, 0));
|
|
if (!p->register_base) {
|
|
ret = -EINVAL;
|
|
goto error;
|
|
}
|
|
|
|
p->regs.config = 0x1000;
|
|
p->regs.status = 0x1008;
|
|
p->regs.tx = 0x1010;
|
|
p->regs.data = 0x1080;
|
|
|
|
p->clk = devm_clk_get(dev, NULL);
|
|
if (IS_ERR(p->clk)) {
|
|
ret = PTR_ERR(p->clk);
|
|
goto error;
|
|
}
|
|
|
|
ret = clk_prepare_enable(p->clk);
|
|
if (ret)
|
|
goto error;
|
|
|
|
p->sys_freq = clk_get_rate(p->clk);
|
|
if (!p->sys_freq)
|
|
p->sys_freq = SYS_FREQ_DEFAULT;
|
|
dev_info(dev, "Set system clock to %u\n", p->sys_freq);
|
|
|
|
master->num_chipselect = 4;
|
|
master->mode_bits = SPI_CPHA | SPI_CPOL | SPI_CS_HIGH |
|
|
SPI_LSB_FIRST | SPI_3WIRE;
|
|
master->transfer_one_message = octeon_spi_transfer_one_message;
|
|
master->bits_per_word_mask = SPI_BPW_MASK(8);
|
|
master->max_speed_hz = OCTEON_SPI_MAX_CLOCK_HZ;
|
|
master->dev.of_node = pdev->dev.of_node;
|
|
|
|
pci_set_drvdata(pdev, master);
|
|
|
|
ret = devm_spi_register_master(dev, master);
|
|
if (ret)
|
|
goto error;
|
|
|
|
return 0;
|
|
|
|
error:
|
|
clk_disable_unprepare(p->clk);
|
|
spi_master_put(master);
|
|
return ret;
|
|
}
|
|
|
|
static void thunderx_spi_remove(struct pci_dev *pdev)
|
|
{
|
|
struct spi_master *master = pci_get_drvdata(pdev);
|
|
struct octeon_spi *p;
|
|
|
|
p = spi_master_get_devdata(master);
|
|
if (!p)
|
|
return;
|
|
|
|
clk_disable_unprepare(p->clk);
|
|
/* Put everything in a known state. */
|
|
writeq(0, p->register_base + OCTEON_SPI_CFG(p));
|
|
}
|
|
|
|
static const struct pci_device_id thunderx_spi_pci_id_table[] = {
|
|
{ PCI_DEVICE(PCI_VENDOR_ID_CAVIUM, 0xa00b) },
|
|
{ 0, }
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(pci, thunderx_spi_pci_id_table);
|
|
|
|
static struct pci_driver thunderx_spi_driver = {
|
|
.name = DRV_NAME,
|
|
.id_table = thunderx_spi_pci_id_table,
|
|
.probe = thunderx_spi_probe,
|
|
.remove = thunderx_spi_remove,
|
|
};
|
|
|
|
module_pci_driver(thunderx_spi_driver);
|
|
|
|
MODULE_DESCRIPTION("Cavium, Inc. ThunderX SPI bus driver");
|
|
MODULE_AUTHOR("Jan Glauber");
|
|
MODULE_LICENSE("GPL");
|