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path: root/drivers/spi/spi-bcm63xx.c
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Diffstat (limited to 'drivers/spi/spi-bcm63xx.c')
-rw-r--r--drivers/spi/spi-bcm63xx.c184
1 files changed, 36 insertions, 148 deletions
diff --git a/drivers/spi/spi-bcm63xx.c b/drivers/spi/spi-bcm63xx.c
index 9578af782a7..8510400e786 100644
--- a/drivers/spi/spi-bcm63xx.c
+++ b/drivers/spi/spi-bcm63xx.c
@@ -20,7 +20,6 @@
*/
#include <linux/kernel.h>
-#include <linux/init.h>
#include <linux/clk.h>
#include <linux/io.h>
#include <linux/module.h>
@@ -30,13 +29,10 @@
#include <linux/spi/spi.h>
#include <linux/completion.h>
#include <linux/err.h>
-#include <linux/workqueue.h>
#include <linux/pm_runtime.h>
#include <bcm63xx_dev_spi.h>
-#define PFX KBUILD_MODNAME
-
#define BCM63XX_SPI_MAX_PREPEND 15
struct bcm63xx_spi {
@@ -46,7 +42,6 @@ struct bcm63xx_spi {
int irq;
/* Platform data */
- u32 speed_hz;
unsigned fifo_size;
unsigned int msg_type_shift;
unsigned int msg_ctl_width;
@@ -93,40 +88,16 @@ static const unsigned bcm63xx_spi_freq_table[SPI_CLK_MASK][2] = {
{ 391000, SPI_CLK_0_391MHZ }
};
-static int bcm63xx_spi_check_transfer(struct spi_device *spi,
- struct spi_transfer *t)
-{
- u8 bits_per_word;
-
- bits_per_word = (t) ? t->bits_per_word : spi->bits_per_word;
- if (bits_per_word != 8) {
- dev_err(&spi->dev, "%s, unsupported bits_per_word=%d\n",
- __func__, bits_per_word);
- return -EINVAL;
- }
-
- if (spi->chip_select > spi->master->num_chipselect) {
- dev_err(&spi->dev, "%s, unsupported slave %d\n",
- __func__, spi->chip_select);
- return -EINVAL;
- }
-
- return 0;
-}
-
static void bcm63xx_spi_setup_transfer(struct spi_device *spi,
struct spi_transfer *t)
{
struct bcm63xx_spi *bs = spi_master_get_devdata(spi->master);
- u32 hz;
u8 clk_cfg, reg;
int i;
- hz = (t) ? t->speed_hz : spi->max_speed_hz;
-
/* Find the closest clock configuration */
for (i = 0; i < SPI_CLK_MASK; i++) {
- if (hz >= bcm63xx_spi_freq_table[i][0]) {
+ if (t->speed_hz >= bcm63xx_spi_freq_table[i][0]) {
clk_cfg = bcm63xx_spi_freq_table[i][1];
break;
}
@@ -143,34 +114,12 @@ static void bcm63xx_spi_setup_transfer(struct spi_device *spi,
bcm_spi_writeb(bs, reg, SPI_CLK_CFG);
dev_dbg(&spi->dev, "Setting clock register to %02x (hz %d)\n",
- clk_cfg, hz);
+ clk_cfg, t->speed_hz);
}
/* the spi->mode bits understood by this driver: */
#define MODEBITS (SPI_CPOL | SPI_CPHA)
-static int bcm63xx_spi_setup(struct spi_device *spi)
-{
- struct bcm63xx_spi *bs;
- int ret;
-
- bs = spi_master_get_devdata(spi->master);
-
- if (!spi->bits_per_word)
- spi->bits_per_word = 8;
-
- if (spi->mode & ~MODEBITS) {
- dev_err(&spi->dev, "%s, unsupported mode bits %x\n",
- __func__, spi->mode & ~MODEBITS);
- return -EINVAL;
- }
-
- dev_dbg(&spi->dev, "%s, mode %d, %u bits/w, %u nsec/bit\n",
- __func__, spi->mode & MODEBITS, spi->bits_per_word, 0);
-
- return 0;
-}
-
static int bcm63xx_txrx_bufs(struct spi_device *spi, struct spi_transfer *first,
unsigned int num_transfers)
{
@@ -216,9 +165,7 @@ static int bcm63xx_txrx_bufs(struct spi_device *spi, struct spi_transfer *first,
transfer_list);
}
- len -= prepend_len;
-
- init_completion(&bs->done);
+ reinit_completion(&bs->done);
/* Fill in the Message control register */
msg_ctl = (len << SPI_BYTE_CNT_SHIFT);
@@ -252,13 +199,7 @@ static int bcm63xx_txrx_bufs(struct spi_device *spi, struct spi_transfer *first,
if (!timeout)
return -ETIMEDOUT;
- /* read out all data */
- rx_tail = bcm_spi_readb(bs, SPI_RX_TAIL);
-
- if (do_rx && rx_tail != len)
- return -EIO;
-
- if (!rx_tail)
+ if (!do_rx)
return 0;
len = 0;
@@ -278,24 +219,6 @@ static int bcm63xx_txrx_bufs(struct spi_device *spi, struct spi_transfer *first,
return 0;
}
-static int bcm63xx_spi_prepare_transfer(struct spi_master *master)
-{
- struct bcm63xx_spi *bs = spi_master_get_devdata(master);
-
- pm_runtime_get_sync(&bs->pdev->dev);
-
- return 0;
-}
-
-static int bcm63xx_spi_unprepare_transfer(struct spi_master *master)
-{
- struct bcm63xx_spi *bs = spi_master_get_devdata(master);
-
- pm_runtime_put(&bs->pdev->dev);
-
- return 0;
-}
-
static int bcm63xx_spi_transfer_one(struct spi_master *master,
struct spi_message *m)
{
@@ -313,10 +236,6 @@ static int bcm63xx_spi_transfer_one(struct spi_master *master,
* full-duplex transfers.
*/
list_for_each_entry(t, &m->transfers, transfer_list) {
- status = bcm63xx_spi_check_transfer(spi, t);
- if (status < 0)
- goto exit;
-
if (!first)
first = t;
@@ -404,58 +323,41 @@ static int bcm63xx_spi_probe(struct platform_device *pdev)
{
struct resource *r;
struct device *dev = &pdev->dev;
- struct bcm63xx_spi_pdata *pdata = pdev->dev.platform_data;
+ struct bcm63xx_spi_pdata *pdata = dev_get_platdata(&pdev->dev);
int irq;
struct spi_master *master;
struct clk *clk;
struct bcm63xx_spi *bs;
int ret;
- r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (!r) {
- dev_err(dev, "no iomem\n");
- ret = -ENXIO;
- goto out;
- }
-
irq = platform_get_irq(pdev, 0);
if (irq < 0) {
dev_err(dev, "no irq\n");
- ret = -ENXIO;
- goto out;
+ return -ENXIO;
}
- clk = clk_get(dev, "spi");
+ clk = devm_clk_get(dev, "spi");
if (IS_ERR(clk)) {
dev_err(dev, "no clock for device\n");
- ret = PTR_ERR(clk);
- goto out;
+ return PTR_ERR(clk);
}
master = spi_alloc_master(dev, sizeof(*bs));
if (!master) {
dev_err(dev, "out of memory\n");
- ret = -ENOMEM;
- goto out_clk;
+ return -ENOMEM;
}
bs = spi_master_get_devdata(master);
+ init_completion(&bs->done);
platform_set_drvdata(pdev, master);
bs->pdev = pdev;
- if (!devm_request_mem_region(&pdev->dev, r->start,
- resource_size(r), PFX)) {
- dev_err(dev, "iomem request failed\n");
- ret = -ENXIO;
- goto out_err;
- }
-
- bs->regs = devm_ioremap_nocache(&pdev->dev, r->start,
- resource_size(r));
- if (!bs->regs) {
- dev_err(dev, "unable to ioremap regs\n");
- ret = -ENOMEM;
+ r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ bs->regs = devm_ioremap_resource(&pdev->dev, r);
+ if (IS_ERR(bs->regs)) {
+ ret = PTR_ERR(bs->regs);
goto out_err;
}
@@ -472,12 +374,10 @@ static int bcm63xx_spi_probe(struct platform_device *pdev)
master->bus_num = pdata->bus_num;
master->num_chipselect = pdata->num_chipselect;
- master->setup = bcm63xx_spi_setup;
- master->prepare_transfer_hardware = bcm63xx_spi_prepare_transfer;
- master->unprepare_transfer_hardware = bcm63xx_spi_unprepare_transfer;
master->transfer_one_message = bcm63xx_spi_transfer_one;
master->mode_bits = MODEBITS;
- bs->speed_hz = pdata->speed_hz;
+ master->bits_per_word_mask = SPI_BPW_MASK(8);
+ master->auto_runtime_pm = true;
bs->msg_type_shift = pdata->msg_type_shift;
bs->msg_ctl_width = pdata->msg_ctl_width;
bs->tx_io = (u8 *)(bs->regs + bcm63xx_spireg(SPI_MSG_DATA));
@@ -490,15 +390,18 @@ static int bcm63xx_spi_probe(struct platform_device *pdev)
default:
dev_err(dev, "unsupported MSG_CTL width: %d\n",
bs->msg_ctl_width);
- goto out_clk_disable;
+ goto out_err;
}
/* Initialize hardware */
- clk_enable(bs->clk);
+ ret = clk_prepare_enable(bs->clk);
+ if (ret)
+ goto out_err;
+
bcm_spi_writeb(bs, SPI_INTR_CLEAR_ALL, SPI_INT_STATUS);
/* register and we are done */
- ret = spi_register_master(master);
+ ret = devm_spi_register_master(dev, master);
if (ret) {
dev_err(dev, "spi register failed\n");
goto out_clk_disable;
@@ -510,79 +413,64 @@ static int bcm63xx_spi_probe(struct platform_device *pdev)
return 0;
out_clk_disable:
- clk_disable(clk);
+ clk_disable_unprepare(clk);
out_err:
- platform_set_drvdata(pdev, NULL);
spi_master_put(master);
-out_clk:
- clk_put(clk);
-out:
return ret;
}
static int bcm63xx_spi_remove(struct platform_device *pdev)
{
- struct spi_master *master = spi_master_get(platform_get_drvdata(pdev));
+ struct spi_master *master = platform_get_drvdata(pdev);
struct bcm63xx_spi *bs = spi_master_get_devdata(master);
- spi_unregister_master(master);
-
/* reset spi block */
bcm_spi_writeb(bs, 0, SPI_INT_MASK);
/* HW shutdown */
- clk_disable(bs->clk);
- clk_put(bs->clk);
-
- platform_set_drvdata(pdev, 0);
-
- spi_master_put(master);
+ clk_disable_unprepare(bs->clk);
return 0;
}
-#ifdef CONFIG_PM
+#ifdef CONFIG_PM_SLEEP
static int bcm63xx_spi_suspend(struct device *dev)
{
- struct spi_master *master =
- platform_get_drvdata(to_platform_device(dev));
+ struct spi_master *master = dev_get_drvdata(dev);
struct bcm63xx_spi *bs = spi_master_get_devdata(master);
spi_master_suspend(master);
- clk_disable(bs->clk);
+ clk_disable_unprepare(bs->clk);
return 0;
}
static int bcm63xx_spi_resume(struct device *dev)
{
- struct spi_master *master =
- platform_get_drvdata(to_platform_device(dev));
+ struct spi_master *master = dev_get_drvdata(dev);
struct bcm63xx_spi *bs = spi_master_get_devdata(master);
+ int ret;
- clk_enable(bs->clk);
+ ret = clk_prepare_enable(bs->clk);
+ if (ret)
+ return ret;
spi_master_resume(master);
return 0;
}
+#endif
static const struct dev_pm_ops bcm63xx_spi_pm_ops = {
- .suspend = bcm63xx_spi_suspend,
- .resume = bcm63xx_spi_resume,
+ SET_SYSTEM_SLEEP_PM_OPS(bcm63xx_spi_suspend, bcm63xx_spi_resume)
};
-#define BCM63XX_SPI_PM_OPS (&bcm63xx_spi_pm_ops)
-#else
-#define BCM63XX_SPI_PM_OPS NULL
-#endif
-
static struct platform_driver bcm63xx_spi_driver = {
.driver = {
.name = "bcm63xx-spi",
.owner = THIS_MODULE,
- .pm = BCM63XX_SPI_PM_OPS,
+ .pm = &bcm63xx_spi_pm_ops,
},
.probe = bcm63xx_spi_probe,
.remove = bcm63xx_spi_remove,
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-10 04:47:58 +0000