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author | 2014-02-18 17:15:54 +0800 | |
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committer | 2014-02-20 08:37:51 +0900 | |
commit | bf5c2e27036cffda6e20f445391a4d4e1ccc232e (patch) | |
tree | ca66006b7dd2fed4a384d620fce38e2988eb472c /drivers/spi/spi-clps711x.c | |
parent | spi: clps711x: Use SPI-core "cs_gpios" property for storing GPIOs (diff) | |
download | linux-bf5c2e27036cffda6e20f445391a4d4e1ccc232e.tar.gz linux-bf5c2e27036cffda6e20f445391a4d4e1ccc232e.tar.bz2 linux-bf5c2e27036cffda6e20f445391a4d4e1ccc232e.zip |
spi: clps711x: Refactor to use core message parsing
Convert to use default implementation of transfer_one_message() which provides
standard handling of delays and chip select management.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Tested-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Mark Brown <broonie@linaro.org>
Diffstat (limited to 'drivers/spi/spi-clps711x.c')
-rw-r--r-- | drivers/spi/spi-clps711x.c | 82 |
1 files changed, 30 insertions, 52 deletions
diff --git a/drivers/spi/spi-clps711x.c b/drivers/spi/spi-clps711x.c index df086ee4cdaa..eda7472ceefa 100644 --- a/drivers/spi/spi-clps711x.c +++ b/drivers/spi/spi-clps711x.c @@ -25,8 +25,6 @@ #define DRIVER_NAME "spi-clps711x" struct spi_clps711x_data { - struct completion done; - struct clk *spi_clk; u32 max_speed_hz; @@ -44,15 +42,6 @@ static int spi_clps711x_setup(struct spi_device *spi) return 0; } -static void spi_clps711x_setup_mode(struct spi_device *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); -} - static void spi_clps711x_setup_xfer(struct spi_device *spi, struct spi_transfer *xfer) { @@ -74,55 +63,44 @@ static void spi_clps711x_setup_xfer(struct spi_device *spi, SYSCON1_ADCKSEL(0), SYSCON1); } -static int spi_clps711x_transfer_one_message(struct spi_master *master, - struct spi_message *msg) +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; - struct spi_transfer *xfer; - - spi_clps711x_setup_mode(spi); - - list_for_each_entry(xfer, &msg->transfers, transfer_list) { - u8 data; - - spi_clps711x_setup_xfer(spi, xfer); - gpio_set_value(spi->cs_gpio, !!(spi->mode & SPI_CS_HIGH)); - - reinit_completion(&hw->done); - - hw->len = xfer->len; - hw->bpw = xfer->bits_per_word ? : spi->bits_per_word; - hw->tx_buf = (u8 *)xfer->tx_buf; - hw->rx_buf = (u8 *)xfer->rx_buf; - - /* Initiate transfer */ - data = hw->tx_buf ? *hw->tx_buf++ : 0; - clps_writel(data | SYNCIO_FRMLEN(hw->bpw) | SYNCIO_TXFRMEN, - SYNCIO); - - wait_for_completion(&hw->done); + /* 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); - if (xfer->delay_usecs) - udelay(xfer->delay_usecs); + return 0; +} - if (xfer->cs_change || - list_is_last(&xfer->transfer_list, &msg->transfers)) - gpio_set_value(spi->cs_gpio, !(spi->mode & SPI_CS_HIGH)); +static int spi_clps711x_transfer_one(struct spi_master *master, + struct spi_device *spi, + struct spi_transfer *xfer) +{ + struct spi_clps711x_data *hw = spi_master_get_devdata(master); + u8 data; - msg->actual_length += xfer->len; - } + spi_clps711x_setup_xfer(spi, xfer); - msg->status = 0; - spi_finalize_current_message(master); + hw->len = xfer->len; + hw->bpw = xfer->bits_per_word ? : spi->bits_per_word; + hw->tx_buf = (u8 *)xfer->tx_buf; + hw->rx_buf = (u8 *)xfer->rx_buf; - return 0; + /* Initiate transfer */ + data = hw->tx_buf ? *hw->tx_buf++ : 0; + clps_writel(data | SYNCIO_FRMLEN(hw->bpw) | SYNCIO_TXFRMEN, SYNCIO); + return 1; } static irqreturn_t spi_clps711x_isr(int irq, void *dev_id) { - struct spi_clps711x_data *hw = (struct spi_clps711x_data *)dev_id; + struct spi_master *master = dev_id; + struct spi_clps711x_data *hw = spi_master_get_devdata(master); u8 data; /* Handle RX */ @@ -136,7 +114,7 @@ static irqreturn_t spi_clps711x_isr(int irq, void *dev_id) clps_writel(data | SYNCIO_FRMLEN(hw->bpw) | SYNCIO_TXFRMEN, SYNCIO); } else - complete(&hw->done); + spi_finalize_current_transfer(master); return IRQ_HANDLED; } @@ -174,7 +152,8 @@ static int spi_clps711x_probe(struct platform_device *pdev) master->bits_per_word_mask = SPI_BPW_RANGE_MASK(1, 8); master->num_chipselect = pdata->num_chipselect; master->setup = spi_clps711x_setup; - master->transfer_one_message = spi_clps711x_transfer_one_message; + master->prepare_message = spi_clps711x_prepare_message; + master->transfer_one = spi_clps711x_transfer_one; hw = spi_master_get_devdata(master); @@ -200,7 +179,6 @@ static int spi_clps711x_probe(struct platform_device *pdev) } hw->max_speed_hz = clk_get_rate(hw->spi_clk); - init_completion(&hw->done); platform_set_drvdata(pdev, master); /* Disable extended mode due hardware problems */ @@ -210,7 +188,7 @@ static int spi_clps711x_probe(struct platform_device *pdev) clps_readl(SYNCIO); ret = devm_request_irq(&pdev->dev, IRQ_SSEOTI, spi_clps711x_isr, 0, - dev_name(&pdev->dev), hw); + dev_name(&pdev->dev), master); if (ret) { dev_err(&pdev->dev, "Can't request IRQ\n"); goto err_out; |