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-rw-r--r--drivers/spi/spi-cadence.c2
-rw-r--r--drivers/spi/spi-fsl-dspi.c12
-rw-r--r--drivers/spi/spi-orion.c77
-rw-r--r--drivers/spi/spi-sh-msiof.c53
4 files changed, 82 insertions, 62 deletions
diff --git a/drivers/spi/spi-cadence.c b/drivers/spi/spi-cadence.c
index f3dad6fcdc35..a568f35522f9 100644
--- a/drivers/spi/spi-cadence.c
+++ b/drivers/spi/spi-cadence.c
@@ -319,7 +319,7 @@ static void cdns_spi_fill_tx_fifo(struct cdns_spi *xspi)
*/
if (cdns_spi_read(xspi, CDNS_SPI_ISR) &
CDNS_SPI_IXR_TXFULL)
- usleep_range(10, 20);
+ udelay(10);
if (xspi->txbuf)
cdns_spi_write(xspi, CDNS_SPI_TXD, *xspi->txbuf++);
diff --git a/drivers/spi/spi-fsl-dspi.c b/drivers/spi/spi-fsl-dspi.c
index 39b3c6f4f5c3..d83d3496d538 100644
--- a/drivers/spi/spi-fsl-dspi.c
+++ b/drivers/spi/spi-fsl-dspi.c
@@ -857,11 +857,23 @@ static int dspi_resume(struct device *dev)
static SIMPLE_DEV_PM_OPS(dspi_pm, dspi_suspend, dspi_resume);
+static const struct regmap_range dspi_volatile_ranges[] = {
+ regmap_reg_range(SPI_MCR, SPI_TCR),
+ regmap_reg_range(SPI_SR, SPI_SR),
+ regmap_reg_range(SPI_PUSHR, SPI_RXFR3),
+};
+
+static const struct regmap_access_table dspi_volatile_table = {
+ .yes_ranges = dspi_volatile_ranges,
+ .n_yes_ranges = ARRAY_SIZE(dspi_volatile_ranges),
+};
+
static const struct regmap_config dspi_regmap_config = {
.reg_bits = 32,
.val_bits = 32,
.reg_stride = 4,
.max_register = 0x88,
+ .volatile_table = &dspi_volatile_table,
};
static void dspi_init(struct fsl_dspi *dspi)
diff --git a/drivers/spi/spi-orion.c b/drivers/spi/spi-orion.c
index d01a6adc726e..47ef6b1a2e76 100644
--- a/drivers/spi/spi-orion.c
+++ b/drivers/spi/spi-orion.c
@@ -20,6 +20,7 @@
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/of_device.h>
+#include <linux/of_gpio.h>
#include <linux/clk.h>
#include <linux/sizes.h>
#include <linux/gpio.h>
@@ -681,9 +682,9 @@ static int orion_spi_probe(struct platform_device *pdev)
goto out_rel_axi_clk;
}
- /* Scan all SPI devices of this controller for direct mapped devices */
for_each_available_child_of_node(pdev->dev.of_node, np) {
u32 cs;
+ int cs_gpio;
/* Get chip-select number from the "reg" property */
status = of_property_read_u32(np, "reg", &cs);
@@ -695,6 +696,44 @@ static int orion_spi_probe(struct platform_device *pdev)
}
/*
+ * Initialize the CS GPIO:
+ * - properly request the actual GPIO signal
+ * - de-assert the logical signal so that all GPIO CS lines
+ * are inactive when probing for slaves
+ * - find an unused physical CS which will be driven for any
+ * slave which uses a CS GPIO
+ */
+ cs_gpio = of_get_named_gpio(pdev->dev.of_node, "cs-gpios", cs);
+ if (cs_gpio > 0) {
+ char *gpio_name;
+ int cs_flags;
+
+ if (spi->unused_hw_gpio == -1) {
+ dev_info(&pdev->dev,
+ "Selected unused HW CS#%d for any GPIO CSes\n",
+ cs);
+ spi->unused_hw_gpio = cs;
+ }
+
+ gpio_name = devm_kasprintf(&pdev->dev, GFP_KERNEL,
+ "%s-CS%d", dev_name(&pdev->dev), cs);
+ if (!gpio_name) {
+ status = -ENOMEM;
+ goto out_rel_axi_clk;
+ }
+
+ cs_flags = of_property_read_bool(np, "spi-cs-high") ?
+ GPIOF_OUT_INIT_LOW : GPIOF_OUT_INIT_HIGH;
+ status = devm_gpio_request_one(&pdev->dev, cs_gpio,
+ cs_flags, gpio_name);
+ if (status) {
+ dev_err(&pdev->dev,
+ "Can't request GPIO for CS %d\n", cs);
+ goto out_rel_axi_clk;
+ }
+ }
+
+ /*
* Check if an address is configured for this SPI device. If
* not, the MBus mapping via the 'ranges' property in the 'soc'
* node is not configured and this device should not use the
@@ -740,44 +779,8 @@ static int orion_spi_probe(struct platform_device *pdev)
if (status < 0)
goto out_rel_pm;
- if (master->cs_gpios) {
- int i;
- for (i = 0; i < master->num_chipselect; ++i) {
- char *gpio_name;
-
- if (!gpio_is_valid(master->cs_gpios[i])) {
- continue;
- }
-
- gpio_name = devm_kasprintf(&pdev->dev, GFP_KERNEL,
- "%s-CS%d", dev_name(&pdev->dev), i);
- if (!gpio_name) {
- status = -ENOMEM;
- goto out_rel_master;
- }
-
- status = devm_gpio_request(&pdev->dev,
- master->cs_gpios[i], gpio_name);
- if (status) {
- dev_err(&pdev->dev,
- "Can't request GPIO for CS %d\n",
- master->cs_gpios[i]);
- goto out_rel_master;
- }
- if (spi->unused_hw_gpio == -1) {
- dev_info(&pdev->dev,
- "Selected unused HW CS#%d for any GPIO CSes\n",
- i);
- spi->unused_hw_gpio = i;
- }
- }
- }
-
-
return status;
-out_rel_master:
- spi_unregister_master(master);
out_rel_pm:
pm_runtime_disable(&pdev->dev);
out_rel_axi_clk:
diff --git a/drivers/spi/spi-sh-msiof.c b/drivers/spi/spi-sh-msiof.c
index 0e74cbf9929d..539d6d1a277a 100644
--- a/drivers/spi/spi-sh-msiof.c
+++ b/drivers/spi/spi-sh-msiof.c
@@ -49,6 +49,7 @@ struct sh_msiof_spi_priv {
struct platform_device *pdev;
struct sh_msiof_spi_info *info;
struct completion done;
+ struct completion done_txdma;
unsigned int tx_fifo_size;
unsigned int rx_fifo_size;
unsigned int min_div_pow;
@@ -649,19 +650,21 @@ static int sh_msiof_slave_abort(struct spi_master *master)
p->slave_aborted = true;
complete(&p->done);
+ complete(&p->done_txdma);
return 0;
}
-static int sh_msiof_wait_for_completion(struct sh_msiof_spi_priv *p)
+static int sh_msiof_wait_for_completion(struct sh_msiof_spi_priv *p,
+ struct completion *x)
{
if (spi_controller_is_slave(p->master)) {
- if (wait_for_completion_interruptible(&p->done) ||
+ if (wait_for_completion_interruptible(x) ||
p->slave_aborted) {
dev_dbg(&p->pdev->dev, "interrupted\n");
return -EINTR;
}
} else {
- if (!wait_for_completion_timeout(&p->done, HZ)) {
+ if (!wait_for_completion_timeout(x, HZ)) {
dev_err(&p->pdev->dev, "timeout\n");
return -ETIMEDOUT;
}
@@ -711,7 +714,7 @@ static int sh_msiof_spi_txrx_once(struct sh_msiof_spi_priv *p,
}
/* wait for tx fifo to be emptied / rx fifo to be filled */
- ret = sh_msiof_wait_for_completion(p);
+ ret = sh_msiof_wait_for_completion(p, &p->done);
if (ret)
goto stop_reset;
@@ -740,10 +743,7 @@ stop_ier:
static void sh_msiof_dma_complete(void *arg)
{
- struct sh_msiof_spi_priv *p = arg;
-
- sh_msiof_write(p, IER, 0);
- complete(&p->done);
+ complete(arg);
}
static int sh_msiof_dma_once(struct sh_msiof_spi_priv *p, const void *tx,
@@ -764,7 +764,7 @@ static int sh_msiof_dma_once(struct sh_msiof_spi_priv *p, const void *tx,
return -EAGAIN;
desc_rx->callback = sh_msiof_dma_complete;
- desc_rx->callback_param = p;
+ desc_rx->callback_param = &p->done;
cookie = dmaengine_submit(desc_rx);
if (dma_submit_error(cookie))
return cookie;
@@ -782,13 +782,8 @@ static int sh_msiof_dma_once(struct sh_msiof_spi_priv *p, const void *tx,
goto no_dma_tx;
}
- if (rx) {
- /* No callback */
- desc_tx->callback = NULL;
- } else {
- desc_tx->callback = sh_msiof_dma_complete;
- desc_tx->callback_param = p;
- }
+ desc_tx->callback = sh_msiof_dma_complete;
+ desc_tx->callback_param = &p->done_txdma;
cookie = dmaengine_submit(desc_tx);
if (dma_submit_error(cookie)) {
ret = cookie;
@@ -805,6 +800,8 @@ static int sh_msiof_dma_once(struct sh_msiof_spi_priv *p, const void *tx,
sh_msiof_write(p, IER, ier_bits);
reinit_completion(&p->done);
+ if (tx)
+ reinit_completion(&p->done_txdma);
p->slave_aborted = false;
/* Now start DMA */
@@ -819,17 +816,24 @@ static int sh_msiof_dma_once(struct sh_msiof_spi_priv *p, const void *tx,
goto stop_dma;
}
- /* wait for tx/rx DMA completion */
- ret = sh_msiof_wait_for_completion(p);
- if (ret)
- goto stop_reset;
+ if (tx) {
+ /* wait for tx DMA completion */
+ ret = sh_msiof_wait_for_completion(p, &p->done_txdma);
+ if (ret)
+ goto stop_reset;
+ }
- if (!rx) {
- reinit_completion(&p->done);
- sh_msiof_write(p, IER, IER_TEOFE);
+ if (rx) {
+ /* wait for rx DMA completion */
+ ret = sh_msiof_wait_for_completion(p, &p->done);
+ if (ret)
+ goto stop_reset;
+ sh_msiof_write(p, IER, 0);
+ } else {
/* wait for tx fifo to be emptied */
- ret = sh_msiof_wait_for_completion(p);
+ sh_msiof_write(p, IER, IER_TEOFE);
+ ret = sh_msiof_wait_for_completion(p, &p->done);
if (ret)
goto stop_reset;
}
@@ -1327,6 +1331,7 @@ static int sh_msiof_spi_probe(struct platform_device *pdev)
p->min_div_pow = chipdata->min_div_pow;
init_completion(&p->done);
+ init_completion(&p->done_txdma);
p->clk = devm_clk_get(&pdev->dev, NULL);
if (IS_ERR(p->clk)) {
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-27 13:13:22 +0000