From 633795b992ebae2a78890c0cfa5c17058eb93817 Mon Sep 17 00:00:00 2001 From: Sourav Poddar Date: Tue, 24 Sep 2013 20:41:23 +0530 Subject: spi/qspi: Add dual/quad read mode bit. Add dual/quad read mode bit flag for the master controller. These check will be used in the spi framework to determine whether the master controller can do dual/quad read respectively. Signed-off-by: Sourav Poddar Signed-off-by: Mark Brown --- drivers/spi/spi-ti-qspi.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/spi/spi-ti-qspi.c b/drivers/spi/spi-ti-qspi.c index e12d962a289f..7a45c3e665f8 100644 --- a/drivers/spi/spi-ti-qspi.c +++ b/drivers/spi/spi-ti-qspi.c @@ -472,7 +472,7 @@ 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; -- cgit v1.2.3 From 3b3a80019ff194e86e740ec2f013a8915efd1ccf Mon Sep 17 00:00:00 2001 From: Sebastian Andrzej Siewior Date: Wed, 2 Oct 2013 16:45:25 +0200 Subject: spi: ti-qspi: one only one interrupt handler The here used irq and threaded irq handler is a complete non-sense. After the status register is read and the source disabled it schedules a thread (the irq thread) to read the status from the variable, invoke complete() and then renable the interrupt. Again: schedule a thread which invokes _only_ complete(). This patch removes this non-sense and we remain with one handler which invokes complete() if needed. The device remove path should now disable the interupts. This has been compile time tested. Signed-off-by: Sebastian Andrzej Siewior Tested-by: Sourav Poddar Signed-off-by: Mark Brown --- drivers/spi/spi-ti-qspi.c | 39 ++++++--------------------------------- 1 file changed, 6 insertions(+), 33 deletions(-) diff --git a/drivers/spi/spi-ti-qspi.c b/drivers/spi/spi-ti-qspi.c index 7a45c3e665f8..a61aeb9bb823 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; @@ -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", @@ -547,6 +519,7 @@ 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); spi_unregister_master(qspi->master); return 0; -- cgit v1.2.3