diff options
| -rw-r--r-- | drivers/spi/spi-clps711x.c | 86 |
1 files changed, 57 insertions, 29 deletions
diff --git a/drivers/spi/spi-clps711x.c b/drivers/spi/spi-clps711x.c index ab010c05dc5a..d9eec4e3b246 100644 --- a/drivers/spi/spi-clps711x.c +++ b/drivers/spi/spi-clps711x.c @@ -17,14 +17,21 @@ #include <linux/module.h> #include <linux/interrupt.h> #include <linux/platform_device.h> +#include <linux/regmap.h> +#include <linux/mfd/syscon.h> +#include <linux/mfd/syscon/clps711x.h> #include <linux/spi/spi.h> #include <linux/platform_data/spi-clps711x.h> -#include <mach/hardware.h> - #define DRIVER_NAME "spi-clps711x" +#define SYNCIO_FRMLEN(x) ((x) << 8) +#define SYNCIO_TXFRMEN (1 << 14) + struct spi_clps711x_data { + void __iomem *syncio; + struct regmap *syscon; + struct regmap *syscon1; struct clk *spi_clk; u32 max_speed_hz; @@ -49,31 +56,29 @@ static void spi_clps711x_setup_xfer(struct spi_device *spi, /* Setup SPI frequency divider */ if (!xfer->speed_hz || (xfer->speed_hz >= hw->max_speed_hz)) - clps_writel((clps_readl(SYSCON1) & ~SYSCON1_ADCKSEL_MASK) | - SYSCON1_ADCKSEL(3), SYSCON1); + regmap_update_bits(hw->syscon1, SYSCON_OFFSET, + SYSCON1_ADCKSEL_MASK, SYSCON1_ADCKSEL(3)); else if (xfer->speed_hz >= (hw->max_speed_hz / 2)) - clps_writel((clps_readl(SYSCON1) & ~SYSCON1_ADCKSEL_MASK) | - SYSCON1_ADCKSEL(2), SYSCON1); + regmap_update_bits(hw->syscon1, SYSCON_OFFSET, + SYSCON1_ADCKSEL_MASK, SYSCON1_ADCKSEL(2)); else if (xfer->speed_hz >= (hw->max_speed_hz / 8)) - clps_writel((clps_readl(SYSCON1) & ~SYSCON1_ADCKSEL_MASK) | - SYSCON1_ADCKSEL(1), SYSCON1); + regmap_update_bits(hw->syscon1, SYSCON_OFFSET, + SYSCON1_ADCKSEL_MASK, SYSCON1_ADCKSEL(1)); else - clps_writel((clps_readl(SYSCON1) & ~SYSCON1_ADCKSEL_MASK) | - SYSCON1_ADCKSEL(0), SYSCON1); + regmap_update_bits(hw->syscon1, SYSCON_OFFSET, + SYSCON1_ADCKSEL_MASK, SYSCON1_ADCKSEL(0)); } static int spi_clps711x_prepare_message(struct spi_master *master, struct spi_message *msg) { + struct spi_clps711x_data *hw = spi_master_get_devdata(master); struct spi_device *spi = msg->spi; - /* Setup edge for transfer */ - if (spi->mode & SPI_CPHA) - clps_writew(clps_readw(SYSCON3) | SYSCON3_ADCCKNSEN, SYSCON3); - else - clps_writew(clps_readw(SYSCON3) & ~SYSCON3_ADCCKNSEN, SYSCON3); - - return 0; + /* Setup mode for transfer */ + return regmap_update_bits(hw->syscon, SYSCON_OFFSET, SYSCON3_ADCCKNSEN, + (spi->mode & SPI_CPHA) ? + SYSCON3_ADCCKNSEN : 0); } static int spi_clps711x_transfer_one(struct spi_master *master, @@ -92,7 +97,8 @@ static int spi_clps711x_transfer_one(struct spi_master *master, /* Initiate transfer */ data = hw->tx_buf ? *hw->tx_buf++ : 0; - clps_writel(data | SYNCIO_FRMLEN(hw->bpw) | SYNCIO_TXFRMEN, SYNCIO); + writel(data | SYNCIO_FRMLEN(hw->bpw) | SYNCIO_TXFRMEN, hw->syncio); + return 1; } @@ -103,15 +109,15 @@ static irqreturn_t spi_clps711x_isr(int irq, void *dev_id) u8 data; /* Handle RX */ - data = clps_readb(SYNCIO); + data = readb(hw->syncio); if (hw->rx_buf) *hw->rx_buf++ = data; /* Handle TX */ if (--hw->len > 0) { data = hw->tx_buf ? *hw->tx_buf++ : 0; - clps_writel(data | SYNCIO_FRMLEN(hw->bpw) | SYNCIO_TXFRMEN, - SYNCIO); + writel(data | SYNCIO_FRMLEN(hw->bpw) | SYNCIO_TXFRMEN, + hw->syncio); } else spi_finalize_current_transfer(master); @@ -120,10 +126,11 @@ static irqreturn_t spi_clps711x_isr(int irq, void *dev_id) static int spi_clps711x_probe(struct platform_device *pdev) { - int i, ret; - struct spi_master *master; struct spi_clps711x_data *hw; struct spi_clps711x_pdata *pdata = dev_get_platdata(&pdev->dev); + struct spi_master *master; + struct resource *res; + int i, irq, ret; if (!pdata) { dev_err(&pdev->dev, "No platform data supplied\n"); @@ -135,6 +142,10 @@ static int spi_clps711x_probe(struct platform_device *pdev) return -EINVAL; } + irq = platform_get_irq(pdev, 0); + if (irq < 0) + return irq; + master = spi_alloc_master(&pdev->dev, sizeof(*hw)); if (!master) return -ENOMEM; @@ -176,18 +187,35 @@ static int spi_clps711x_probe(struct platform_device *pdev) platform_set_drvdata(pdev, master); + hw->syscon = syscon_regmap_lookup_by_pdevname("syscon.3"); + if (IS_ERR(hw->syscon)) { + ret = PTR_ERR(hw->syscon); + goto err_out; + } + + hw->syscon1 = syscon_regmap_lookup_by_pdevname("syscon.1"); + if (IS_ERR(hw->syscon1)) { + ret = PTR_ERR(hw->syscon1); + goto err_out; + } + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + hw->syncio = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(hw->syncio)) { + ret = PTR_ERR(hw->syncio); + goto err_out; + } + /* Disable extended mode due hardware problems */ - clps_writew(clps_readw(SYSCON3) & ~SYSCON3_ADCCON, SYSCON3); + regmap_update_bits(hw->syscon, SYSCON_OFFSET, SYSCON3_ADCCON, 0); /* Clear possible pending interrupt */ - clps_readl(SYNCIO); + readl(hw->syncio); - ret = devm_request_irq(&pdev->dev, IRQ_SSEOTI, spi_clps711x_isr, 0, + ret = devm_request_irq(&pdev->dev, irq, spi_clps711x_isr, 0, dev_name(&pdev->dev), master); - if (ret) { - dev_err(&pdev->dev, "Can't request IRQ\n"); + if (ret) goto err_out; - } ret = devm_spi_register_master(&pdev->dev, master); if (!ret) { |