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path: root/drivers/spi/spi-sh-msiof.c
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Diffstat (limited to 'drivers/spi/spi-sh-msiof.c')
-rw-r--r--drivers/spi/spi-sh-msiof.c53
1 files changed, 3 insertions, 50 deletions
diff --git a/drivers/spi/spi-sh-msiof.c b/drivers/spi/spi-sh-msiof.c
index 8f134735291f..b3732dc231cb 100644
--- a/drivers/spi/spi-sh-msiof.c
+++ b/drivers/spi/spi-sh-msiof.c
@@ -14,8 +14,6 @@
#include <linux/dma-mapping.h>
#include <linux/dmaengine.h>
#include <linux/err.h>
-#include <linux/gpio.h>
-#include <linux/gpio/consumer.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/iopoll.h>
@@ -55,7 +53,6 @@ struct sh_msiof_spi_priv {
void *rx_dma_page;
dma_addr_t tx_dma_addr;
dma_addr_t rx_dma_addr;
- unsigned short unused_ss;
bool native_cs_inited;
bool native_cs_high;
bool slave_aborted;
@@ -587,7 +584,7 @@ static int sh_msiof_prepare_message(struct spi_controller *ctlr,
/* Configure pins before asserting CS */
if (spi->cs_gpiod) {
- ss = p->unused_ss;
+ ss = ctlr->unused_native_cs;
cs_high = p->native_cs_high;
} else {
ss = spi->chip_select;
@@ -1124,46 +1121,6 @@ static struct sh_msiof_spi_info *sh_msiof_spi_parse_dt(struct device *dev)
}
#endif
-static int sh_msiof_get_cs_gpios(struct sh_msiof_spi_priv *p)
-{
- struct device *dev = &p->pdev->dev;
- unsigned int used_ss_mask = 0;
- unsigned int cs_gpios = 0;
- unsigned int num_cs, i;
- int ret;
-
- ret = gpiod_count(dev, "cs");
- if (ret <= 0)
- return 0;
-
- num_cs = max_t(unsigned int, ret, p->ctlr->num_chipselect);
- for (i = 0; i < num_cs; i++) {
- struct gpio_desc *gpiod;
-
- gpiod = devm_gpiod_get_index(dev, "cs", i, GPIOD_ASIS);
- if (!IS_ERR(gpiod)) {
- devm_gpiod_put(dev, gpiod);
- cs_gpios++;
- continue;
- }
-
- if (PTR_ERR(gpiod) != -ENOENT)
- return PTR_ERR(gpiod);
-
- if (i >= MAX_SS) {
- dev_err(dev, "Invalid native chip select %d\n", i);
- return -EINVAL;
- }
- used_ss_mask |= BIT(i);
- }
- p->unused_ss = ffz(used_ss_mask);
- if (cs_gpios && p->unused_ss >= MAX_SS) {
- dev_err(dev, "No unused native chip select available\n");
- return -EINVAL;
- }
- return 0;
-}
-
static struct dma_chan *sh_msiof_request_dma_chan(struct device *dev,
enum dma_transfer_direction dir, unsigned int id, dma_addr_t port_addr)
{
@@ -1373,17 +1330,12 @@ static int sh_msiof_spi_probe(struct platform_device *pdev)
if (p->info->rx_fifo_override)
p->rx_fifo_size = p->info->rx_fifo_override;
- /* Setup GPIO chip selects */
- ctlr->num_chipselect = p->info->num_chipselect;
- ret = sh_msiof_get_cs_gpios(p);
- if (ret)
- goto err1;
-
/* init controller code */
ctlr->mode_bits = SPI_CPOL | SPI_CPHA | SPI_CS_HIGH;
ctlr->mode_bits |= SPI_LSB_FIRST | SPI_3WIRE;
ctlr->flags = chipdata->ctlr_flags;
ctlr->bus_num = pdev->id;
+ ctlr->num_chipselect = p->info->num_chipselect;
ctlr->dev.of_node = pdev->dev.of_node;
ctlr->setup = sh_msiof_spi_setup;
ctlr->prepare_message = sh_msiof_prepare_message;
@@ -1392,6 +1344,7 @@ static int sh_msiof_spi_probe(struct platform_device *pdev)
ctlr->auto_runtime_pm = true;
ctlr->transfer_one = sh_msiof_transfer_one;
ctlr->use_gpio_descriptors = true;
+ ctlr->max_native_cs = MAX_SS;
ret = sh_msiof_request_dma(p);
if (ret < 0)