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authorMark Brown <broonie@linaro.org>2013-10-25 12:51:36 +0400
committerMark Brown <broonie@linaro.org>2013-10-25 12:51:36 +0400
commitb3d6c80050900f55b3f51eba97c3e563d5d099c0 (patch)
treeba3cb8f53715576f32cbd3e1b57a33628dd9edd3 /drivers/spi
parent982d6287435afb2cbd05bcabe1392658e20e613c (diff)
parentdabefd56c6ee883bae0bdce4d5396c3f21286ab8 (diff)
downloadlinux-b3d6c80050900f55b3f51eba97c3e563d5d099c0.tar.xz
Merge remote-tracking branch 'spi/topic/qspi' into spi-next
Diffstat (limited to 'drivers/spi')
-rw-r--r--drivers/spi/spi-ti-qspi.c50
1 files changed, 16 insertions, 34 deletions
diff --git a/drivers/spi/spi-ti-qspi.c b/drivers/spi/spi-ti-qspi.c
index 4e2109d9853d..0b71270fbf67 100644
--- a/drivers/spi/spi-ti-qspi.c
+++ b/drivers/spi/spi-ti-qspi.c
@@ -41,9 +41,6 @@ struct ti_qspi_regs {
struct ti_qspi {
struct completion transfer_complete;
- /* IRQ synchronization */
- spinlock_t lock;
-
/* list synchronization */
struct mutex list_lock;
@@ -57,7 +54,6 @@ struct ti_qspi {
u32 spi_max_frequency;
u32 cmd;
u32 dc;
- u32 stat;
};
#define QSPI_PID (0x0)
@@ -397,13 +393,12 @@ static irqreturn_t ti_qspi_isr(int irq, void *dev_id)
{
struct ti_qspi *qspi = dev_id;
u16 int_stat;
+ u32 stat;
irqreturn_t ret = IRQ_HANDLED;
- spin_lock(&qspi->lock);
-
int_stat = ti_qspi_read(qspi, QSPI_INTR_STATUS_ENABLED_CLEAR);
- qspi->stat = ti_qspi_read(qspi, QSPI_SPI_STATUS_REG);
+ stat = ti_qspi_read(qspi, QSPI_SPI_STATUS_REG);
if (!int_stat) {
dev_dbg(qspi->dev, "No IRQ triggered\n");
@@ -411,35 +406,14 @@ static irqreturn_t ti_qspi_isr(int irq, void *dev_id)
goto out;
}
- ret = IRQ_WAKE_THREAD;
-
- ti_qspi_write(qspi, QSPI_WC_INT_DISABLE, QSPI_INTR_ENABLE_CLEAR_REG);
ti_qspi_write(qspi, QSPI_WC_INT_DISABLE,
QSPI_INTR_STATUS_ENABLED_CLEAR);
-
+ if (stat & WC)
+ complete(&qspi->transfer_complete);
out:
- spin_unlock(&qspi->lock);
-
return ret;
}
-static irqreturn_t ti_qspi_threaded_isr(int this_irq, void *dev_id)
-{
- struct ti_qspi *qspi = dev_id;
- unsigned long flags;
-
- spin_lock_irqsave(&qspi->lock, flags);
-
- if (qspi->stat & WC)
- complete(&qspi->transfer_complete);
-
- spin_unlock_irqrestore(&qspi->lock, flags);
-
- ti_qspi_write(qspi, QSPI_WC_INT_EN, QSPI_INTR_ENABLE_SET_REG);
-
- return IRQ_HANDLED;
-}
-
static int ti_qspi_runtime_resume(struct device *dev)
{
struct ti_qspi *qspi;
@@ -472,7 +446,7 @@ static int ti_qspi_probe(struct platform_device *pdev)
if (!master)
return -ENOMEM;
- master->mode_bits = SPI_CPOL | SPI_CPHA;
+ master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_RX_DUAL | SPI_RX_QUAD;
master->bus_num = -1;
master->flags = SPI_MASTER_HALF_DUPLEX;
@@ -499,7 +473,6 @@ static int ti_qspi_probe(struct platform_device *pdev)
return irq;
}
- spin_lock_init(&qspi->lock);
mutex_init(&qspi->list_lock);
qspi->base = devm_ioremap_resource(&pdev->dev, r);
@@ -508,8 +481,7 @@ static int ti_qspi_probe(struct platform_device *pdev)
goto free_master;
}
- ret = devm_request_threaded_irq(&pdev->dev, irq, ti_qspi_isr,
- ti_qspi_threaded_isr, 0,
+ ret = devm_request_irq(&pdev->dev, irq, ti_qspi_isr, 0,
dev_name(&pdev->dev), qspi);
if (ret < 0) {
dev_err(&pdev->dev, "Failed to register ISR for IRQ %d\n",
@@ -543,12 +515,22 @@ free_master:
return ret;
}
+static int ti_qspi_remove(struct platform_device *pdev)
+{
+ struct ti_qspi *qspi = platform_get_drvdata(pdev);
+
+ ti_qspi_write(qspi, QSPI_WC_INT_DISABLE, QSPI_INTR_ENABLE_CLEAR_REG);
+
+ return 0;
+}
+
static const struct dev_pm_ops ti_qspi_pm_ops = {
.runtime_resume = ti_qspi_runtime_resume,
};
static struct platform_driver ti_qspi_driver = {
.probe = ti_qspi_probe,
+ .remove = ti_qspi_remove,
.driver = {
.name = "ti,dra7xxx-qspi",
.owner = THIS_MODULE,