From 113b1a071583aff4750e95f3373fac18ac319bee Mon Sep 17 00:00:00 2001 From: Jingoo Han Date: Wed, 7 May 2014 16:50:04 +0900 Subject: spi: qup: Make of_device_id array const Make of_device_id array const, because all OF functions handle it as const. Signed-off-by: Jingoo Han Reviewed-by: Axel Lin Signed-off-by: Mark Brown --- drivers/spi/spi-qup.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/spi/spi-qup.c') diff --git a/drivers/spi/spi-qup.c b/drivers/spi/spi-qup.c index b032e8885e2..17c5f600100 100644 --- a/drivers/spi/spi-qup.c +++ b/drivers/spi/spi-qup.c @@ -749,7 +749,7 @@ static int spi_qup_remove(struct platform_device *pdev) return 0; } -static struct of_device_id spi_qup_dt_match[] = { +static const struct of_device_id spi_qup_dt_match[] = { { .compatible = "qcom,spi-qup-v2.1.1", }, { .compatible = "qcom,spi-qup-v2.2.1", }, { } -- cgit v1.2.3-70-g09d2 From 8f391222c06c27e072e306e7eefd41d39b68ec46 Mon Sep 17 00:00:00 2001 From: Andy Gross Date: Tue, 13 May 2014 16:34:42 -0500 Subject: spi: qup: Correct selection of FIFO/Block mode This patch fixes the calculation for determining whether to use FIFO or BLOCK mode. Signed-off-by: Andy Gross Signed-off-by: Mark Brown --- drivers/spi/spi-qup.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'drivers/spi/spi-qup.c') diff --git a/drivers/spi/spi-qup.c b/drivers/spi/spi-qup.c index 78c66e3c53e..943f973a59a 100644 --- a/drivers/spi/spi-qup.c +++ b/drivers/spi/spi-qup.c @@ -287,7 +287,7 @@ static irqreturn_t spi_qup_qup_irq(int irq, void *dev_id) writel_relaxed(opflags, controller->base + QUP_OPERATIONAL); if (!xfer) { - dev_err_ratelimited(controller->dev, "unexpected irq %x08 %x08 %x08\n", + dev_err_ratelimited(controller->dev, "unexpected irq %08x %08x %08x\n", qup_err, spi_err, opflags); return IRQ_HANDLED; } @@ -366,7 +366,7 @@ static int spi_qup_io_config(struct spi_device *spi, struct spi_transfer *xfer) n_words = xfer->len / w_size; controller->w_size = w_size; - if (n_words <= controller->in_fifo_sz) { + if (n_words <= (controller->in_fifo_sz / sizeof(u32))) { mode = QUP_IO_M_MODE_FIFO; writel_relaxed(n_words, controller->base + QUP_MX_READ_CNT); writel_relaxed(n_words, controller->base + QUP_MX_WRITE_CNT); -- cgit v1.2.3-70-g09d2 From 045c243a511c8b688d36659cc3f781e84e9c2ddb Mon Sep 17 00:00:00 2001 From: Andy Gross Date: Thu, 12 Jun 2014 14:34:11 -0500 Subject: spi: qup: Fix order of spi_register_master This patch moves the devm_spi_register_master below the initialization of the runtime_pm. If done in the wrong order, the spi_register_master fails if any probed slave devices issue SPI transactions. Signed-off-by: Andy Gross Acked-by: Ivan T. Ivanov Signed-off-by: Mark Brown --- drivers/spi/spi-qup.c | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-) (limited to 'drivers/spi/spi-qup.c') diff --git a/drivers/spi/spi-qup.c b/drivers/spi/spi-qup.c index fc1de86d3c8..e783e4ce2cd 100644 --- a/drivers/spi/spi-qup.c +++ b/drivers/spi/spi-qup.c @@ -640,16 +640,19 @@ static int spi_qup_probe(struct platform_device *pdev) if (ret) goto error; - ret = devm_spi_register_master(dev, master); - if (ret) - goto error; - pm_runtime_set_autosuspend_delay(dev, MSEC_PER_SEC); pm_runtime_use_autosuspend(dev); pm_runtime_set_active(dev); pm_runtime_enable(dev); + + ret = devm_spi_register_master(dev, master); + if (ret) + goto disable_pm; + return 0; +disable_pm: + pm_runtime_disable(&pdev->dev); error: clk_disable_unprepare(cclk); clk_disable_unprepare(iclk); -- cgit v1.2.3-70-g09d2 From 4a8573abe965115bc5b064401fd669b74e985258 Mon Sep 17 00:00:00 2001 From: Andy Gross Date: Thu, 12 Jun 2014 14:34:10 -0500 Subject: spi: qup: Remove chip select function This patch removes the chip select function. Chip select should instead be supported using GPIOs, defining the DT entry "cs-gpios", and letting the SPI core assert/deassert the chip select as it sees fit. The chip select control inside the controller is buggy. It is supposed to automatically assert the chip select based on the activity in the controller, but it is buggy and doesn't work at all. So instead we elect to use GPIOs. Signed-off-by: Andy Gross Signed-off-by: Mark Brown --- .../devicetree/bindings/spi/qcom,spi-qup.txt | 6 ++++ drivers/spi/spi-qup.c | 33 ++++------------------ 2 files changed, 12 insertions(+), 27 deletions(-) (limited to 'drivers/spi/spi-qup.c') diff --git a/Documentation/devicetree/bindings/spi/qcom,spi-qup.txt b/Documentation/devicetree/bindings/spi/qcom,spi-qup.txt index b82a268f1bd..bee6ff204ba 100644 --- a/Documentation/devicetree/bindings/spi/qcom,spi-qup.txt +++ b/Documentation/devicetree/bindings/spi/qcom,spi-qup.txt @@ -23,6 +23,12 @@ Optional properties: - spi-max-frequency: Specifies maximum SPI clock frequency, Units - Hz. Definition as per Documentation/devicetree/bindings/spi/spi-bus.txt +- num-cs: total number of chipselects +- cs-gpios: should specify GPIOs used for chipselects. + The gpios will be referred to as reg = in the SPI child + nodes. If unspecified, a single SPI device without a chip + select can be used. + SPI slave nodes must be children of the SPI master node and can contain properties described in Documentation/devicetree/bindings/spi/spi-bus.txt diff --git a/drivers/spi/spi-qup.c b/drivers/spi/spi-qup.c index e783e4ce2cd..c08da380cb2 100644 --- a/drivers/spi/spi-qup.c +++ b/drivers/spi/spi-qup.c @@ -424,31 +424,6 @@ static int spi_qup_io_config(struct spi_device *spi, struct spi_transfer *xfer) return 0; } -static void spi_qup_set_cs(struct spi_device *spi, bool enable) -{ - struct spi_qup *controller = spi_master_get_devdata(spi->master); - - u32 iocontol, mask; - - iocontol = readl_relaxed(controller->base + SPI_IO_CONTROL); - - /* Disable auto CS toggle and use manual */ - iocontol &= ~SPI_IO_C_MX_CS_MODE; - iocontol |= SPI_IO_C_FORCE_CS; - - iocontol &= ~SPI_IO_C_CS_SELECT_MASK; - iocontol |= SPI_IO_C_CS_SELECT(spi->chip_select); - - mask = SPI_IO_C_CS_N_POLARITY_0 << spi->chip_select; - - if (enable) - iocontol |= mask; - else - iocontol &= ~mask; - - writel_relaxed(iocontol, controller->base + SPI_IO_CONTROL); -} - static int spi_qup_transfer_one(struct spi_master *master, struct spi_device *spi, struct spi_transfer *xfer) @@ -571,12 +546,16 @@ static int spi_qup_probe(struct platform_device *pdev) return -ENOMEM; } + /* use num-cs unless not present or out of range */ + if (of_property_read_u16(dev->of_node, "num-cs", + &master->num_chipselect) || + (master->num_chipselect > SPI_NUM_CHIPSELECTS)) + master->num_chipselect = SPI_NUM_CHIPSELECTS; + master->bus_num = pdev->id; master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_CS_HIGH | SPI_LOOP; - master->num_chipselect = SPI_NUM_CHIPSELECTS; master->bits_per_word_mask = SPI_BPW_RANGE_MASK(4, 32); master->max_speed_hz = max_freq; - master->set_cs = spi_qup_set_cs; master->transfer_one = spi_qup_transfer_one; master->dev.of_node = pdev->dev.of_node; master->auto_runtime_pm = true; -- cgit v1.2.3-70-g09d2