summaryrefslogtreecommitdiffstats
path: root/drivers/spi/spi-pxa2xx.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/spi/spi-pxa2xx.c')
-rw-r--r--drivers/spi/spi-pxa2xx.c52
1 files changed, 27 insertions, 25 deletions
diff --git a/drivers/spi/spi-pxa2xx.c b/drivers/spi/spi-pxa2xx.c
index 2eb06ee0b32..cb0e1f1137a 100644
--- a/drivers/spi/spi-pxa2xx.c
+++ b/drivers/spi/spi-pxa2xx.c
@@ -546,8 +546,17 @@ static irqreturn_t ssp_int(int irq, void *dev_id)
if (pm_runtime_suspended(&drv_data->pdev->dev))
return IRQ_NONE;
- sccr1_reg = read_SSCR1(reg);
+ /*
+ * If the device is not yet in RPM suspended state and we get an
+ * interrupt that is meant for another device, check if status bits
+ * are all set to one. That means that the device is already
+ * powered off.
+ */
status = read_SSSR(reg);
+ if (status == ~0)
+ return IRQ_NONE;
+
+ sccr1_reg = read_SSCR1(reg);
/* Ignore possible writes if we don't need to write */
if (!(sccr1_reg & SSCR1_TIE))
@@ -564,8 +573,8 @@ static irqreturn_t ssp_int(int irq, void *dev_id)
write_SSTO(0, reg);
write_SSSR_CS(drv_data, drv_data->clear_sr);
- dev_err(&drv_data->pdev->dev, "bad message state "
- "in interrupt handler\n");
+ dev_err(&drv_data->pdev->dev,
+ "bad message state in interrupt handler\n");
/* Never fail */
return IRQ_HANDLED;
@@ -642,8 +651,8 @@ static void pump_transfers(unsigned long data)
if (message->is_dma_mapped
|| transfer->rx_dma || transfer->tx_dma) {
dev_err(&drv_data->pdev->dev,
- "pump_transfers: mapped transfer length "
- "of %u is greater than %d\n",
+ "pump_transfers: mapped transfer length of "
+ "%u is greater than %d\n",
transfer->len, MAX_DMA_LEN);
message->status = -EINVAL;
giveback(drv_data);
@@ -651,11 +660,10 @@ static void pump_transfers(unsigned long data)
}
/* warn ... we force this to PIO mode */
- if (printk_ratelimit())
- dev_warn(&message->spi->dev, "pump_transfers: "
- "DMA disabled for transfer length %ld "
- "greater than %d\n",
- (long)drv_data->len, MAX_DMA_LEN);
+ dev_warn_ratelimited(&message->spi->dev,
+ "pump_transfers: DMA disabled for transfer length %ld "
+ "greater than %d\n",
+ (long)drv_data->len, MAX_DMA_LEN);
}
/* Setup the transfer state based on the type of transfer */
@@ -717,11 +725,8 @@ static void pump_transfers(unsigned long data)
message->spi,
bits, &dma_burst,
&dma_thresh))
- if (printk_ratelimit())
- dev_warn(&message->spi->dev,
- "pump_transfers: "
- "DMA burst size reduced to "
- "match bits_per_word\n");
+ dev_warn_ratelimited(&message->spi->dev,
+ "pump_transfers: DMA burst size reduced to match bits_per_word\n");
}
cr0 = clk_div
@@ -845,8 +850,8 @@ static int setup_cs(struct spi_device *spi, struct chip_data *chip,
if (gpio_is_valid(chip_info->gpio_cs)) {
err = gpio_request(chip_info->gpio_cs, "SPI_CS");
if (err) {
- dev_err(&spi->dev, "failed to request chip select "
- "GPIO%d\n", chip_info->gpio_cs);
+ dev_err(&spi->dev, "failed to request chip select GPIO%d\n",
+ chip_info->gpio_cs);
return err;
}
@@ -890,8 +895,8 @@ static int setup(struct spi_device *spi)
if (drv_data->ssp_type == CE4100_SSP) {
if (spi->chip_select > 4) {
- dev_err(&spi->dev, "failed setup: "
- "cs number must not be > 4.\n");
+ dev_err(&spi->dev,
+ "failed setup: cs number must not be > 4.\n");
kfree(chip);
return -EINVAL;
}
@@ -947,8 +952,8 @@ static int setup(struct spi_device *spi)
spi->bits_per_word,
&chip->dma_burst_size,
&chip->dma_threshold)) {
- dev_warn(&spi->dev, "in setup: DMA burst size reduced "
- "to match bits_per_word\n");
+ dev_warn(&spi->dev,
+ "in setup: DMA burst size reduced to match bits_per_word\n");
}
}
@@ -1196,7 +1201,7 @@ static int pxa2xx_spi_probe(struct platform_device *pdev)
/* Register with the SPI framework */
platform_set_drvdata(pdev, drv_data);
- status = spi_register_master(master);
+ status = devm_spi_register_master(&pdev->dev, master);
if (status != 0) {
dev_err(&pdev->dev, "problem registering spi master\n");
goto out_error_clock_enabled;
@@ -1248,9 +1253,6 @@ static int pxa2xx_spi_remove(struct platform_device *pdev)
/* Release SSP */
pxa_ssp_free(ssp);
- /* Disconnect from the SPI framework */
- spi_unregister_master(drv_data->master);
-
return 0;
}