168 lines
5.1 KiB
Diff
168 lines
5.1 KiB
Diff
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From 3027505ab8c8cb17291e53bca1d7bd770539d468 Mon Sep 17 00:00:00 2001
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From: Axel Lin <axel.lin@ingics.com>
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Date: Mon, 24 Feb 2014 23:07:36 +0800
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Subject: [PATCH 073/182] spi: qup: Get rid of using struct spi_qup_device
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Current code uses struct spi_qup_device to store spi->mode and spi->chip_select
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settings. We can get these settings in spi_qup_transfer_one and spi_qup_set_cs
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without using struct spi_qup_device. Refactor the code a bit to remove
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spi_qup_setup(), spi_qup_cleanup(), and struct spi_qup_device.
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Signed-off-by: Axel Lin <axel.lin@ingics.com>
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Tested-by: Ivan T. Ivanov <iivanov@mm-sol.com>
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Signed-off-by: Mark Brown <broonie@linaro.org>
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---
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drivers/spi/spi-qup.c | 61 ++++++++-----------------------------------------
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1 file changed, 9 insertions(+), 52 deletions(-)
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diff --git a/drivers/spi/spi-qup.c b/drivers/spi/spi-qup.c
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index 203f0d4..b032e88 100644
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--- a/drivers/spi/spi-qup.c
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+++ b/drivers/spi/spi-qup.c
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@@ -123,11 +123,6 @@
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#define SPI_DELAY_THRESHOLD 1
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#define SPI_DELAY_RETRY 10
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-struct spi_qup_device {
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- int select;
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- u16 mode;
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-};
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-
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struct spi_qup {
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void __iomem *base;
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struct device *dev;
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@@ -338,14 +333,13 @@ static irqreturn_t spi_qup_qup_irq(int irq, void *dev_id)
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/* set clock freq ... bits per word */
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-static int spi_qup_io_config(struct spi_qup *controller,
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- struct spi_qup_device *chip,
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- struct spi_transfer *xfer)
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+static int spi_qup_io_config(struct spi_device *spi, struct spi_transfer *xfer)
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{
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+ struct spi_qup *controller = spi_master_get_devdata(spi->master);
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u32 config, iomode, mode;
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int ret, n_words, w_size;
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- if (chip->mode & SPI_LOOP && xfer->len > controller->in_fifo_sz) {
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+ if (spi->mode & SPI_LOOP && xfer->len > controller->in_fifo_sz) {
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dev_err(controller->dev, "too big size for loopback %d > %d\n",
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xfer->len, controller->in_fifo_sz);
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return -EIO;
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@@ -399,12 +393,12 @@ static int spi_qup_io_config(struct spi_qup *controller,
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config = readl_relaxed(controller->base + SPI_CONFIG);
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- if (chip->mode & SPI_LOOP)
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+ if (spi->mode & SPI_LOOP)
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config |= SPI_CONFIG_LOOPBACK;
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else
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config &= ~SPI_CONFIG_LOOPBACK;
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- if (chip->mode & SPI_CPHA)
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+ if (spi->mode & SPI_CPHA)
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config &= ~SPI_CONFIG_INPUT_FIRST;
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else
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config |= SPI_CONFIG_INPUT_FIRST;
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@@ -413,7 +407,7 @@ static int spi_qup_io_config(struct spi_qup *controller,
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* HS_MODE improves signal stability for spi-clk high rates,
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* but is invalid in loop back mode.
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*/
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- if ((xfer->speed_hz >= SPI_HS_MIN_RATE) && !(chip->mode & SPI_LOOP))
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+ if ((xfer->speed_hz >= SPI_HS_MIN_RATE) && !(spi->mode & SPI_LOOP))
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config |= SPI_CONFIG_HS_MODE;
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else
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config &= ~SPI_CONFIG_HS_MODE;
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@@ -433,7 +427,6 @@ static int spi_qup_io_config(struct spi_qup *controller,
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static void spi_qup_set_cs(struct spi_device *spi, bool enable)
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{
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struct spi_qup *controller = spi_master_get_devdata(spi->master);
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- struct spi_qup_device *chip = spi_get_ctldata(spi);
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u32 iocontol, mask;
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@@ -444,9 +437,9 @@ static void spi_qup_set_cs(struct spi_device *spi, bool enable)
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iocontol |= SPI_IO_C_FORCE_CS;
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iocontol &= ~SPI_IO_C_CS_SELECT_MASK;
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- iocontol |= SPI_IO_C_CS_SELECT(chip->select);
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+ iocontol |= SPI_IO_C_CS_SELECT(spi->chip_select);
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- mask = SPI_IO_C_CS_N_POLARITY_0 << chip->select;
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+ mask = SPI_IO_C_CS_N_POLARITY_0 << spi->chip_select;
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if (enable)
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iocontol |= mask;
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@@ -461,11 +454,10 @@ static int spi_qup_transfer_one(struct spi_master *master,
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struct spi_transfer *xfer)
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{
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struct spi_qup *controller = spi_master_get_devdata(master);
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- struct spi_qup_device *chip = spi_get_ctldata(spi);
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unsigned long timeout, flags;
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int ret = -EIO;
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- ret = spi_qup_io_config(controller, chip, xfer);
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+ ret = spi_qup_io_config(spi, xfer);
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if (ret)
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return ret;
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@@ -511,38 +503,6 @@ exit:
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return ret;
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}
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-static int spi_qup_setup(struct spi_device *spi)
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-{
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- struct spi_qup *controller = spi_master_get_devdata(spi->master);
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- struct spi_qup_device *chip = spi_get_ctldata(spi);
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-
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- if (!chip) {
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- /* First setup */
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- chip = kzalloc(sizeof(*chip), GFP_KERNEL);
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- if (!chip) {
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- dev_err(controller->dev, "no memory for chip data\n");
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- return -ENOMEM;
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- }
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-
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- chip->mode = spi->mode;
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- chip->select = spi->chip_select;
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- spi_set_ctldata(spi, chip);
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- }
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-
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- return 0;
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-}
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-
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-static void spi_qup_cleanup(struct spi_device *spi)
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-{
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- struct spi_qup_device *chip = spi_get_ctldata(spi);
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-
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- if (!chip)
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- return;
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-
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- spi_set_ctldata(spi, NULL);
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- kfree(chip);
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-}
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-
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static int spi_qup_probe(struct platform_device *pdev)
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{
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struct spi_master *master;
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@@ -561,7 +521,6 @@ static int spi_qup_probe(struct platform_device *pdev)
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return PTR_ERR(base);
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irq = platform_get_irq(pdev, 0);
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-
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if (irq < 0)
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return irq;
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@@ -617,8 +576,6 @@ static int spi_qup_probe(struct platform_device *pdev)
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master->num_chipselect = SPI_NUM_CHIPSELECTS;
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master->bits_per_word_mask = SPI_BPW_RANGE_MASK(4, 32);
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master->max_speed_hz = max_freq;
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- master->setup = spi_qup_setup;
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- master->cleanup = spi_qup_cleanup;
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master->set_cs = spi_qup_set_cs;
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master->transfer_one = spi_qup_transfer_one;
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master->dev.of_node = pdev->dev.of_node;
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--
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1.7.10.4
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