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From 3027505ab8c8cb17291e53bca1d7bd770539d468 Mon Sep 17 00:00:00 2001
From: Axel Lin <axel.lin@ingics.com>
Date: Mon, 24 Feb 2014 23:07:36 +0800
Subject: [PATCH 073/182] 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>
---
drivers/spi/spi-qup.c | 61 ++++++++-----------------------------------------
1 file 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;
--
1.7.10.4
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