forked from luck/tmp_suning_uos_patched
spi: davinci: use spi_device.cs_gpio to store gpio cs per spi device
Rework Davinci SPI driver to store GPIO CS number in cs_gpio field of SPI device structure (spi_device) for both DT and non-DT cases. This will make Davinci SPI driver code simpler and allows to reuse more SPI core functionality. Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com> Signed-off-by: Mark Brown <broonie@linaro.org>
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a88e34ea21
commit
c060014063
@ -208,9 +208,7 @@ static inline void clear_io_bits(void __iomem *addr, u32 bits)
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static void davinci_spi_chipselect(struct spi_device *spi, int value)
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{
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struct davinci_spi *dspi;
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struct device_node *np = spi->dev.of_node;
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struct davinci_spi_platform_data *pdata;
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struct spi_master *master = spi->master;
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u8 chip_sel = spi->chip_select;
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u16 spidat1 = CS_DEFAULT;
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bool gpio_chipsel = false;
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@ -219,16 +217,10 @@ static void davinci_spi_chipselect(struct spi_device *spi, int value)
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dspi = spi_master_get_devdata(spi->master);
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pdata = &dspi->pdata;
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if (np && master->cs_gpios != NULL && spi->cs_gpio >= 0) {
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if (spi->cs_gpio >= 0) {
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/* SPI core parse and update master->cs_gpio */
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gpio_chipsel = true;
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gpio = spi->cs_gpio;
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} else if (pdata->chip_sel &&
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chip_sel < pdata->num_chipselect &&
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pdata->chip_sel[chip_sel] != SPI_INTERN_CS) {
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/* platform data defines chip_sel */
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gpio_chipsel = true;
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gpio = pdata->chip_sel[chip_sel];
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}
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/*
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@ -237,9 +229,9 @@ static void davinci_spi_chipselect(struct spi_device *spi, int value)
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*/
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if (gpio_chipsel) {
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if (value == BITBANG_CS_ACTIVE)
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gpio_set_value(gpio, 0);
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gpio_set_value(gpio, spi->mode & SPI_CS_HIGH);
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else
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gpio_set_value(gpio, 1);
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gpio_set_value(gpio, !(spi->mode & SPI_CS_HIGH));
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} else {
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if (value == BITBANG_CS_ACTIVE) {
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spidat1 |= SPIDAT1_CSHOLD_MASK;
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@ -405,35 +397,34 @@ static int davinci_spi_setup(struct spi_device *spi)
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struct spi_master *master = spi->master;
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struct device_node *np = spi->dev.of_node;
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bool internal_cs = true;
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unsigned long flags = GPIOF_DIR_OUT;
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dspi = spi_master_get_devdata(spi->master);
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pdata = &dspi->pdata;
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flags |= (spi->mode & SPI_CS_HIGH) ? GPIOF_INIT_LOW : GPIOF_INIT_HIGH;
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if (!(spi->mode & SPI_NO_CS)) {
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if (np && (master->cs_gpios != NULL) && (spi->cs_gpio >= 0)) {
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unsigned long flags;
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flags = GPIOF_DIR_OUT;
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if (spi->mode & SPI_CS_HIGH)
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flags |= GPIOF_INIT_LOW;
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else
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flags |= GPIOF_INIT_HIGH;
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retval = gpio_request_one(spi->cs_gpio,
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flags, dev_name(&spi->dev));
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if (retval) {
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dev_err(&spi->dev,
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"GPIO %d request failed (%d)\n",
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spi->cs_gpio, retval);
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return retval;
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}
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internal_cs = false;
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} else if (pdata->chip_sel &&
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spi->chip_select < pdata->num_chipselect &&
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pdata->chip_sel[spi->chip_select] != SPI_INTERN_CS) {
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spi->cs_gpio = pdata->chip_sel[spi->chip_select];
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retval = gpio_request_one(spi->cs_gpio,
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flags, dev_name(&spi->dev));
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internal_cs = false;
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}
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}
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if (retval) {
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dev_err(&spi->dev, "GPIO %d setup failed (%d)\n",
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spi->cs_gpio, retval);
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return retval;
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}
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if (internal_cs)
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set_io_bits(dspi->base + SPIPC0, 1 << spi->chip_select);
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@ -450,10 +441,7 @@ static int davinci_spi_setup(struct spi_device *spi)
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static void davinci_spi_cleanup(struct spi_device *spi)
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{
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struct spi_master *master = spi->master;
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struct device_node *np = spi->dev.of_node;
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if (np && (master->cs_gpios != NULL) && (spi->cs_gpio >= 0))
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if (spi->cs_gpio >= 0)
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gpio_free(spi->cs_gpio);
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}
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@ -895,7 +883,7 @@ static int davinci_spi_probe(struct platform_device *pdev)
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struct resource *r;
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resource_size_t dma_rx_chan = SPI_NO_RESOURCE;
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resource_size_t dma_tx_chan = SPI_NO_RESOURCE;
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int i = 0, ret = 0;
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int ret = 0;
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u32 spipc0;
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master = spi_alloc_master(&pdev->dev, sizeof(struct davinci_spi));
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@ -1016,14 +1004,6 @@ static int davinci_spi_probe(struct platform_device *pdev)
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spipc0 = SPIPC0_DIFUN_MASK | SPIPC0_DOFUN_MASK | SPIPC0_CLKFUN_MASK;
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iowrite32(spipc0, dspi->base + SPIPC0);
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/* initialize chip selects */
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if (pdata->chip_sel) {
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for (i = 0; i < pdata->num_chipselect; i++) {
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if (pdata->chip_sel[i] != SPI_INTERN_CS)
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gpio_direction_output(pdata->chip_sel[i], 1);
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}
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}
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if (pdata->intr_line)
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iowrite32(SPI_INTLVL_1, dspi->base + SPILVL);
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else
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