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path: root/drivers/spi/spi-txx9.c
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Diffstat (limited to 'drivers/spi/spi-txx9.c')
-rw-r--r--drivers/spi/spi-txx9.c71
1 files changed, 21 insertions, 50 deletions
diff --git a/drivers/spi/spi-txx9.c b/drivers/spi/spi-txx9.c
index d5a3cbb646c..5f183baa91a 100644
--- a/drivers/spi/spi-txx9.c
+++ b/drivers/spi/spi-txx9.c
@@ -26,7 +26,7 @@
#include <linux/clk.h>
#include <linux/io.h>
#include <linux/module.h>
-#include <asm/gpio.h>
+#include <linux/gpio.h>
#define SPI_FIFO_SIZE 4
@@ -80,7 +80,6 @@ struct txx9spi {
void __iomem *membase;
int baseclk;
struct clk *clk;
- u32 max_speed_hz, min_speed_hz;
int last_chipselect;
int last_chipselect_val;
};
@@ -116,15 +115,8 @@ static void txx9spi_cs_func(struct spi_device *spi, struct txx9spi *c,
static int txx9spi_setup(struct spi_device *spi)
{
struct txx9spi *c = spi_master_get_devdata(spi->master);
- u8 bits_per_word;
- if (!spi->max_speed_hz
- || spi->max_speed_hz > c->max_speed_hz
- || spi->max_speed_hz < c->min_speed_hz)
- return -EINVAL;
-
- bits_per_word = spi->bits_per_word;
- if (bits_per_word != 8 && bits_per_word != 16)
+ if (!spi->max_speed_hz)
return -EINVAL;
if (gpio_direction_output(spi->chip_select,
@@ -182,16 +174,15 @@ static void txx9spi_work_one(struct txx9spi *c, struct spi_message *m)
| 0x08,
TXx9_SPCR0);
- list_for_each_entry (t, &m->transfers, transfer_list) {
+ list_for_each_entry(t, &m->transfers, transfer_list) {
const void *txbuf = t->tx_buf;
void *rxbuf = t->rx_buf;
u32 data;
unsigned int len = t->len;
unsigned int wsize;
u32 speed_hz = t->speed_hz ? : spi->max_speed_hz;
- u8 bits_per_word = t->bits_per_word ? : spi->bits_per_word;
+ u8 bits_per_word = t->bits_per_word;
- bits_per_word = bits_per_word ? : 8;
wsize = bits_per_word >> 3; /* in bytes */
if (prev_speed_hz != speed_hz
@@ -271,7 +262,8 @@ static void txx9spi_work_one(struct txx9spi *c, struct spi_message *m)
exit:
m->status = status;
- m->complete(m->context);
+ if (m->complete)
+ m->complete(m->context);
/* normally deactivate chipselect ... unless no error and
* cs_change has hinted that the next message will probably
@@ -314,19 +306,9 @@ static int txx9spi_transfer(struct spi_device *spi, struct spi_message *m)
m->actual_length = 0;
/* check each transfer's parameters */
- list_for_each_entry (t, &m->transfers, transfer_list) {
- u32 speed_hz = t->speed_hz ? : spi->max_speed_hz;
- u8 bits_per_word = t->bits_per_word ? : spi->bits_per_word;
-
- bits_per_word = bits_per_word ? : 8;
+ list_for_each_entry(t, &m->transfers, transfer_list) {
if (!t->tx_buf && !t->rx_buf && t->len)
return -EINVAL;
- if (bits_per_word != 8 && bits_per_word != 16)
- return -EINVAL;
- if (t->len & ((bits_per_word >> 3) - 1))
- return -EINVAL;
- if (speed_hz < c->min_speed_hz || speed_hz > c->max_speed_hz)
- return -EINVAL;
}
spin_lock_irqsave(&c->lock, flags);
@@ -337,7 +319,7 @@ static int txx9spi_transfer(struct spi_device *spi, struct spi_message *m)
return 0;
}
-static int __init txx9spi_probe(struct platform_device *dev)
+static int txx9spi_probe(struct platform_device *dev)
{
struct spi_master *master;
struct txx9spi *c;
@@ -357,7 +339,7 @@ static int __init txx9spi_probe(struct platform_device *dev)
INIT_LIST_HEAD(&c->queue);
init_waitqueue_head(&c->waitq);
- c->clk = clk_get(&dev->dev, "spi-baseclk");
+ c->clk = devm_clk_get(&dev->dev, "spi-baseclk");
if (IS_ERR(c->clk)) {
ret = PTR_ERR(c->clk);
c->clk = NULL;
@@ -365,22 +347,16 @@ static int __init txx9spi_probe(struct platform_device *dev)
}
ret = clk_enable(c->clk);
if (ret) {
- clk_put(c->clk);
c->clk = NULL;
goto exit;
}
c->baseclk = clk_get_rate(c->clk);
- c->min_speed_hz = DIV_ROUND_UP(c->baseclk, SPI_MAX_DIVIDER + 1);
- c->max_speed_hz = c->baseclk / (SPI_MIN_DIVIDER + 1);
+ master->min_speed_hz = DIV_ROUND_UP(c->baseclk, SPI_MAX_DIVIDER + 1);
+ master->max_speed_hz = c->baseclk / (SPI_MIN_DIVIDER + 1);
res = platform_get_resource(dev, IORESOURCE_MEM, 0);
- if (!res)
- goto exit_busy;
- if (!devm_request_mem_region(&dev->dev, res->start, resource_size(res),
- "spi_txx9"))
- goto exit_busy;
- c->membase = devm_ioremap(&dev->dev, res->start, resource_size(res));
- if (!c->membase)
+ c->membase = devm_ioremap_resource(&dev->dev, res);
+ if (IS_ERR(c->membase))
goto exit_busy;
/* enter config mode */
@@ -413,8 +389,9 @@ static int __init txx9spi_probe(struct platform_device *dev)
master->setup = txx9spi_setup;
master->transfer = txx9spi_transfer;
master->num_chipselect = (u16)UINT_MAX; /* any GPIO numbers */
+ master->bits_per_word_mask = SPI_BPW_MASK(8) | SPI_BPW_MASK(16);
- ret = spi_register_master(master);
+ ret = devm_spi_register_master(&dev->dev, master);
if (ret)
goto exit;
return 0;
@@ -423,26 +400,19 @@ exit_busy:
exit:
if (c->workqueue)
destroy_workqueue(c->workqueue);
- if (c->clk) {
+ if (c->clk)
clk_disable(c->clk);
- clk_put(c->clk);
- }
- platform_set_drvdata(dev, NULL);
spi_master_put(master);
return ret;
}
-static int __exit txx9spi_remove(struct platform_device *dev)
+static int txx9spi_remove(struct platform_device *dev)
{
- struct spi_master *master = spi_master_get(platform_get_drvdata(dev));
+ struct spi_master *master = platform_get_drvdata(dev);
struct txx9spi *c = spi_master_get_devdata(master);
- spi_unregister_master(master);
- platform_set_drvdata(dev, NULL);
destroy_workqueue(c->workqueue);
clk_disable(c->clk);
- clk_put(c->clk);
- spi_master_put(master);
return 0;
}
@@ -450,7 +420,8 @@ static int __exit txx9spi_remove(struct platform_device *dev)
MODULE_ALIAS("platform:spi_txx9");
static struct platform_driver txx9spi_driver = {
- .remove = __exit_p(txx9spi_remove),
+ .probe = txx9spi_probe,
+ .remove = txx9spi_remove,
.driver = {
.name = "spi_txx9",
.owner = THIS_MODULE,
@@ -459,7 +430,7 @@ static struct platform_driver txx9spi_driver = {
static int __init txx9spi_init(void)
{
- return platform_driver_probe(&txx9spi_driver, txx9spi_probe);
+ return platform_driver_register(&txx9spi_driver);
}
subsys_initcall(txx9spi_init);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-09 23:05:37 +0000