diff options
Diffstat (limited to '')
| -rw-r--r-- | Documentation/devicetree/bindings/spi/qcom,spi-qup.txt | 6 | ||||
| -rw-r--r-- | drivers/spi/spi-pxa2xx.c | 8 | ||||
| -rw-r--r-- | drivers/spi/spi-qup.c | 44 | ||||
| -rw-r--r-- | drivers/spi/spi-sh-sci.c | 4 |
4 files changed, 27 insertions, 35 deletions
diff --git a/Documentation/devicetree/bindings/spi/qcom,spi-qup.txt b/Documentation/devicetree/bindings/spi/qcom,spi-qup.txt index b82a268f1bd4..bee6ff204baf 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 = <index> 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-pxa2xx.c b/drivers/spi/spi-pxa2xx.c index a98df7eeb42d..fe792106bdc5 100644 --- a/drivers/spi/spi-pxa2xx.c +++ b/drivers/spi/spi-pxa2xx.c @@ -118,6 +118,7 @@ static void lpss_ssp_setup(struct driver_data *drv_data) */ orig = readl(drv_data->ioaddr + offset + SPI_CS_CONTROL); + /* Test SPI_CS_CONTROL_SW_MODE bit enabling */ value = orig | SPI_CS_CONTROL_SW_MODE; writel(value, drv_data->ioaddr + offset + SPI_CS_CONTROL); value = readl(drv_data->ioaddr + offset + SPI_CS_CONTROL); @@ -126,10 +127,13 @@ static void lpss_ssp_setup(struct driver_data *drv_data) goto detection_done; } - value &= ~SPI_CS_CONTROL_SW_MODE; + orig = readl(drv_data->ioaddr + offset + SPI_CS_CONTROL); + + /* Test SPI_CS_CONTROL_SW_MODE bit disabling */ + value = orig & ~SPI_CS_CONTROL_SW_MODE; writel(value, drv_data->ioaddr + offset + SPI_CS_CONTROL); value = readl(drv_data->ioaddr + offset + SPI_CS_CONTROL); - if (value != orig) { + if (value != (orig & ~SPI_CS_CONTROL_SW_MODE)) { offset = 0x800; goto detection_done; } diff --git a/drivers/spi/spi-qup.c b/drivers/spi/spi-qup.c index fc1de86d3c8a..c08da380cb23 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; @@ -640,16 +619,19 @@ 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); diff --git a/drivers/spi/spi-sh-sci.c b/drivers/spi/spi-sh-sci.c index 1f56ef651d1a..b83dd733684c 100644 --- a/drivers/spi/spi-sh-sci.c +++ b/drivers/spi/spi-sh-sci.c @@ -175,9 +175,9 @@ static int sh_sci_spi_remove(struct platform_device *dev) { struct sh_sci_spi *sp = platform_get_drvdata(dev); - iounmap(sp->membase); - setbits(sp, PIN_INIT, 0); spi_bitbang_stop(&sp->bitbang); + setbits(sp, PIN_INIT, 0); + iounmap(sp->membase); spi_master_put(sp->bitbang.master); return 0; } |