diff options
author | Axel Lin <axel.lin@ingics.com> | 2014-02-24 15:07:36 (GMT) |
---|---|---|
committer | Mark Brown <broonie@linaro.org> | 2014-02-25 23:54:54 (GMT) |
commit | 00cce74d081e86ee0660cbe41699cbc523a55605 (patch) | |
tree | 4a8faf69010a3ea2b15c483b33f524d065dae801 | |
parent | 83f091440db9ba3f739522cee0c627ecfe1cc8ef (diff) | |
download | linux-00cce74d081e86ee0660cbe41699cbc523a55605.tar.xz |
spi: qup: Get rid of using struct spi_qup_device
Current code uses struct spi_qup_device to store spi->mode and spi->chip_select
settings. We can get these settings in spi_qup_transfer_one and spi_qup_set_cs
without using struct spi_qup_device. Refactor the code a bit to remove
spi_qup_setup(), spi_qup_cleanup(), and struct spi_qup_device.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Tested-by: Ivan T. Ivanov <iivanov@mm-sol.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
-rw-r--r-- | drivers/spi/spi-qup.c | 61 |
1 files changed, 9 insertions, 52 deletions
diff --git a/drivers/spi/spi-qup.c b/drivers/spi/spi-qup.c index 203f0d4..b032e88 100644 --- a/drivers/spi/spi-qup.c +++ b/drivers/spi/spi-qup.c @@ -123,11 +123,6 @@ #define SPI_DELAY_THRESHOLD 1 #define SPI_DELAY_RETRY 10 -struct spi_qup_device { - int select; - u16 mode; -}; - struct spi_qup { void __iomem *base; struct device *dev; @@ -338,14 +333,13 @@ static irqreturn_t spi_qup_qup_irq(int irq, void *dev_id) /* set clock freq ... bits per word */ -static int spi_qup_io_config(struct spi_qup *controller, - struct spi_qup_device *chip, - struct spi_transfer *xfer) +static int spi_qup_io_config(struct spi_device *spi, struct spi_transfer *xfer) { + struct spi_qup *controller = spi_master_get_devdata(spi->master); u32 config, iomode, mode; int ret, n_words, w_size; - if (chip->mode & SPI_LOOP && xfer->len > controller->in_fifo_sz) { + if (spi->mode & SPI_LOOP && xfer->len > controller->in_fifo_sz) { dev_err(controller->dev, "too big size for loopback %d > %d\n", xfer->len, controller->in_fifo_sz); return -EIO; @@ -399,12 +393,12 @@ static int spi_qup_io_config(struct spi_qup *controller, config = readl_relaxed(controller->base + SPI_CONFIG); - if (chip->mode & SPI_LOOP) + if (spi->mode & SPI_LOOP) config |= SPI_CONFIG_LOOPBACK; else config &= ~SPI_CONFIG_LOOPBACK; - if (chip->mode & SPI_CPHA) + if (spi->mode & SPI_CPHA) config &= ~SPI_CONFIG_INPUT_FIRST; else config |= SPI_CONFIG_INPUT_FIRST; @@ -413,7 +407,7 @@ static int spi_qup_io_config(struct spi_qup *controller, * HS_MODE improves signal stability for spi-clk high rates, * but is invalid in loop back mode. */ - if ((xfer->speed_hz >= SPI_HS_MIN_RATE) && !(chip->mode & SPI_LOOP)) + if ((xfer->speed_hz >= SPI_HS_MIN_RATE) && !(spi->mode & SPI_LOOP)) config |= SPI_CONFIG_HS_MODE; else config &= ~SPI_CONFIG_HS_MODE; @@ -433,7 +427,6 @@ static int spi_qup_io_config(struct spi_qup *controller, static void spi_qup_set_cs(struct spi_device *spi, bool enable) { struct spi_qup *controller = spi_master_get_devdata(spi->master); - struct spi_qup_device *chip = spi_get_ctldata(spi); u32 iocontol, mask; @@ -444,9 +437,9 @@ static void spi_qup_set_cs(struct spi_device *spi, bool enable) iocontol |= SPI_IO_C_FORCE_CS; iocontol &= ~SPI_IO_C_CS_SELECT_MASK; - iocontol |= SPI_IO_C_CS_SELECT(chip->select); + iocontol |= SPI_IO_C_CS_SELECT(spi->chip_select); - mask = SPI_IO_C_CS_N_POLARITY_0 << chip->select; + mask = SPI_IO_C_CS_N_POLARITY_0 << spi->chip_select; if (enable) iocontol |= mask; @@ -461,11 +454,10 @@ static int spi_qup_transfer_one(struct spi_master *master, struct spi_transfer *xfer) { struct spi_qup *controller = spi_master_get_devdata(master); - struct spi_qup_device *chip = spi_get_ctldata(spi); unsigned long timeout, flags; int ret = -EIO; - ret = spi_qup_io_config(controller, chip, xfer); + ret = spi_qup_io_config(spi, xfer); if (ret) return ret; @@ -511,38 +503,6 @@ exit: return ret; } -static int spi_qup_setup(struct spi_device *spi) -{ - struct spi_qup *controller = spi_master_get_devdata(spi->master); - struct spi_qup_device *chip = spi_get_ctldata(spi); - - if (!chip) { - /* First setup */ - chip = kzalloc(sizeof(*chip), GFP_KERNEL); - if (!chip) { - dev_err(controller->dev, "no memory for chip data\n"); - return -ENOMEM; - } - - chip->mode = spi->mode; - chip->select = spi->chip_select; - spi_set_ctldata(spi, chip); - } - - return 0; -} - -static void spi_qup_cleanup(struct spi_device *spi) -{ - struct spi_qup_device *chip = spi_get_ctldata(spi); - - if (!chip) - return; - - spi_set_ctldata(spi, NULL); - kfree(chip); -} - static int spi_qup_probe(struct platform_device *pdev) { struct spi_master *master; @@ -561,7 +521,6 @@ static int spi_qup_probe(struct platform_device *pdev) return PTR_ERR(base); irq = platform_get_irq(pdev, 0); - if (irq < 0) return irq; @@ -617,8 +576,6 @@ static int spi_qup_probe(struct platform_device *pdev) master->num_chipselect = SPI_NUM_CHIPSELECTS; master->bits_per_word_mask = SPI_BPW_RANGE_MASK(4, 32); master->max_speed_hz = max_freq; - master->setup = spi_qup_setup; - master->cleanup = spi_qup_cleanup; master->set_cs = spi_qup_set_cs; master->transfer_one = spi_qup_transfer_one; master->dev.of_node = pdev->dev.of_node; |