C++ spi_master_get_devdata函数代码示例

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本文整理汇总了C++中spi_master_get_devdata函数的典型用法代码示例。如果您正苦于以下问题：C++ spi_master_get_devdata函数的具体用法？C++ spi_master_get_devdata怎么用？C++ spi_master_get_devdata使用的例子？那么恭喜您, 这里精选的函数代码示例或许可以为您提供帮助。

在下文中一共展示了spi_master_get_devdata函数的20个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于我们的系统推荐出更棒的C++代码示例。

示例1: omap2_mcspi_txrx_dma

static unsigned
omap2_mcspi_txrx_dma(struct spi_device *spi, struct spi_transfer *xfer)
{
	struct omap2_mcspi	*mcspi;
	struct omap2_mcspi_cs	*cs = spi->controller_state;
	struct omap2_mcspi_dma  *mcspi_dma;
	unsigned int		count, c;
	unsigned long		base, tx_reg, rx_reg;
	int			word_len, data_type, element_count;
	int			elements = 0;
	u32			l;
	u8			* rx;
	const u8		* tx;
	void __iomem		*chstat_reg;

	mcspi = spi_master_get_devdata(spi->master);
	mcspi_dma = &mcspi->dma_channels[spi->chip_select];
	l = mcspi_cached_chconf0(spi);

	chstat_reg = cs->base + OMAP2_MCSPI_CHSTAT0;

	count = xfer->len;
	c = count;
	word_len = cs->word_len;

	base = cs->phys;
	tx_reg = base + OMAP2_MCSPI_TX0;
	rx_reg = base + OMAP2_MCSPI_RX0;
	rx = xfer->rx_buf;
	tx = xfer->tx_buf;

	if (word_len <= 8) {
		data_type = OMAP_DMA_DATA_TYPE_S8;
		element_count = count;
	} else if (word_len <= 16) {
		data_type = OMAP_DMA_DATA_TYPE_S16;
		element_count = count >> 1;
	} else /* word_len <= 32 */ {

开发者ID:AsherBond，项目名称:ceph-client，代码行数:38，代码来源:spi-omap2-mcspi.c

示例2: xilinx_spi_setup_transfer

/* spi_bitbang requires custom setup_transfer() to be defined if there is a
 * custom txrx_bufs(). We have nothing to setup here as the SPI IP block
 * supports just 8 bits per word, and SPI clock can't be changed in software.
 * Check for 8 bits per word. Chip select delay calculations could be
 * added here as soon as bitbang_work() can be made aware of the delay value.
 */
static int xilinx_spi_setup_transfer(struct spi_device *spi,
		struct spi_transfer *t)
{
	u8 bits_per_word;
	u32 hz;
	struct xilinx_spi *xspi = spi_master_get_devdata(spi->master);

	bits_per_word = (t) ? t->bits_per_word : spi->bits_per_word;
	hz = (t) ? t->speed_hz : spi->max_speed_hz;
	if (bits_per_word != 8) {
		dev_err(&spi->dev, "%s, unsupported bits_per_word=%d\n",
			__func__, bits_per_word);
		return -EINVAL;
	}

	if (hz && xspi->speed_hz > hz) {
		dev_err(&spi->dev, "%s, unsupported clock rate %uHz\n",
			__func__, hz);
		return -EINVAL;
	}

	return 0;
}

开发者ID:LouZiffer，项目名称:m900_kernel_cupcake-SDX，代码行数:29，代码来源:xilinx_spi.c

示例3: omap2_mcspi_rx_dma

static unsigned
omap2_mcspi_rx_dma(struct spi_device *spi, struct spi_transfer *xfer,
				struct dma_slave_config cfg,
				unsigned es)
{
	struct omap2_mcspi	*mcspi;
	struct omap2_mcspi_dma  *mcspi_dma;
	unsigned int		count;
	u32			l;
	int			elements = 0;
	int			word_len, element_count;
	struct omap2_mcspi_cs	*cs = spi->controller_state;
	mcspi = spi_master_get_devdata(spi->master);
	mcspi_dma = &mcspi->dma_channels[spi->chip_select];
	count = xfer->len;
	word_len = cs->word_len;
	l = mcspi_cached_chconf0(spi);

	if (word_len <= 8)
		element_count = count;
	else if (word_len <= 16)
		element_count = count >> 1;
	else /* word_len <= 32 */

开发者ID:AiWinters，项目名称:linux，代码行数:23，代码来源:spi-omap2-mcspi.c

示例4: omap2_mcspi_set_master_mode

static void omap2_mcspi_set_master_mode(struct spi_master *master)
{
	u32 l;
	struct omap2_mcspi *mcspi = spi_master_get_devdata(master);

	/* setup when switching from (reset default) slave mode
	 * to single-channel master mode based on config value
	 */
	l = mcspi_read_reg(master, OMAP2_MCSPI_MODULCTRL);
	MOD_REG_BIT(l, OMAP2_MCSPI_MODULCTRL_STEST, 0);
	MOD_REG_BIT(l, OMAP2_MCSPI_MODULCTRL_MS, 0);

#ifdef CONFIG_SPI_SW_CS
	if (mcspi->force_cs_mode)
		MOD_REG_BIT(l, OMAP2_MCSPI_MODULCTRL_SINGLE, 1);
#else
	MOD_REG_BIT(l, OMAP2_MCSPI_MODULCTRL_SINGLE, 0);
#endif

	mcspi_write_reg(master, OMAP2_MCSPI_MODULCTRL, l);

	omap2_mcspi_ctx[master->bus_num - 1].modulctrl = l;
}

开发者ID:STS-Dev-Team，项目名称:kernel_mapphone_kexec，代码行数:23，代码来源:omap2_mcspi.c

示例5: spi_stm_remove

static int spi_stm_remove(struct platform_device *pdev)
{
	struct spi_stm *spi_stm;
	struct spi_master *master;

	master = platform_get_drvdata(pdev);
	spi_stm = spi_master_get_devdata(master);

	spi_bitbang_stop(&spi_stm->bitbang);

	clk_disable(spi_stm->clk);

	stm_pad_release(spi_stm->pad_state);
	free_irq(spi_stm->r_irq.start, spi_stm);
	iounmap(spi_stm->base);
	release_mem_region(spi_stm->r_mem.start,
			   resource_size(&spi_stm->r_mem));

	spi_master_put(spi_stm->bitbang.master);
	platform_set_drvdata(pdev, NULL);

	return 0;
}

开发者ID:geraldmusch，项目名称:satip-axe，代码行数:23，代码来源:spi_stm.c

示例6: spi_qup_remove

static int spi_qup_remove(struct platform_device *pdev)
{
	struct spi_master *master = dev_get_drvdata(&pdev->dev);
	struct spi_qup *controller = spi_master_get_devdata(master);
	int ret;

	ret = pm_runtime_get_sync(&pdev->dev);
	if (ret < 0)
		return ret;

	ret = spi_qup_set_state(controller, QUP_STATE_RESET);
	if (ret)
		return ret;

	spi_qup_release_dma(master);

	clk_disable_unprepare(controller->cclk);
	clk_disable_unprepare(controller->iclk);

	pm_runtime_put_noidle(&pdev->dev);
	pm_runtime_disable(&pdev->dev);
	return 0;
}

开发者ID:020gzh，项目名称:linux，代码行数:23，代码来源:spi-qup.c

示例7: spi_ppc4xx_txrx

static int spi_ppc4xx_txrx(struct spi_device *spi, struct spi_transfer *t)
{
	struct ppc4xx_spi *hw;
	u8 data;

	dev_dbg(&spi->dev, "txrx: tx %p, rx %p, len %d\n",
		t->tx_buf, t->rx_buf, t->len);

	hw = spi_master_get_devdata(spi->master);

	hw->tx = t->tx_buf;
	hw->rx = t->rx_buf;
	hw->len = t->len;
	hw->count = 0;

	/* send the first byte */
	data = hw->tx ? hw->tx[0] : 0;
	out_8(&hw->regs->txd, data);
	out_8(&hw->regs->cr, SPI_PPC4XX_CR_STR);
	wait_for_completion(&hw->done);

	return hw->count;
}

开发者ID:AnadoluPanteri，项目名称:kernel-plus-harmattan，代码行数:23，代码来源:spi-ppc4xx.c

示例8: xilinx_spi_chipselect

static void xilinx_spi_chipselect(struct spi_device *spi, int is_on)
{
	struct xilinx_spi *xspi = spi_master_get_devdata(spi->master);

	if (is_on == BITBANG_CS_INACTIVE) {
		
		xspi->write_fn(0xffff, xspi->regs + XSPI_SSR_OFFSET);
	} else if (is_on == BITBANG_CS_ACTIVE) {
		
		u16 cr = xspi->read_fn(xspi->regs + XSPI_CR_OFFSET)
			 & ~XSPI_CR_MODE_MASK;
		if (spi->mode & SPI_CPHA)
			cr |= XSPI_CR_CPHA;
		if (spi->mode & SPI_CPOL)
			cr |= XSPI_CR_CPOL;
		xspi->write_fn(cr, xspi->regs + XSPI_CR_OFFSET);


		
		xspi->write_fn(~(0x0001 << spi->chip_select),
			xspi->regs + XSPI_SSR_OFFSET);
	}
}

开发者ID:DirtyDroidX，项目名称:android_kernel_htc_m8ul，代码行数:23，代码来源:spi-xilinx.c

示例9: spi_bitbang_bufs

static int spi_bitbang_bufs(struct spi_device *spi, struct spi_transfer *t)
{
	struct spi_bitbang_cs	*cs = spi->controller_state;
	unsigned		nsecs = cs->nsecs;
	struct spi_bitbang	*bitbang;

	bitbang = spi_master_get_devdata(spi->master);
	if (bitbang->set_line_direction) {
		int err;

		err = bitbang->set_line_direction(spi, !!(t->tx_buf));
		if (err < 0)
			return err;
	}

	if (spi->mode & SPI_3WIRE) {
		unsigned flags;

		flags = t->tx_buf ? SPI_MASTER_NO_RX : SPI_MASTER_NO_TX;
		return cs->txrx_bufs(spi, cs->txrx_word, nsecs, t, flags);
	}
	return cs->txrx_bufs(spi, cs->txrx_word, nsecs, t, 0);
}

开发者ID:AlexShiLucky，项目名称:linux，代码行数:23，代码来源:spi-bitbang.c

示例10: mx21_config

static int mx21_config(struct spi_device *spi, struct spi_imx_config *config)
{
	struct spi_imx_data *spi_imx = spi_master_get_devdata(spi->master);
	unsigned int reg = MX21_CSPICTRL_ENABLE | MX21_CSPICTRL_MASTER;
	unsigned int max = is_imx27_cspi(spi_imx) ? 16 : 18;

	reg |= spi_imx_clkdiv_1(spi_imx->spi_clk, config->speed_hz, max) <<
		MX21_CSPICTRL_DR_SHIFT;
	reg |= config->bpw - 1;

	if (spi->mode & SPI_CPHA)
		reg |= MX21_CSPICTRL_PHA;
	if (spi->mode & SPI_CPOL)
		reg |= MX21_CSPICTRL_POL;
	if (spi->mode & SPI_CS_HIGH)
		reg |= MX21_CSPICTRL_SSPOL;
	if (spi->cs_gpio < 0)
		reg |= (spi->cs_gpio + 32) << MX21_CSPICTRL_CS_SHIFT;

	writel(reg, spi_imx->base + MXC_CSPICTRL);

	return 0;
}

开发者ID:acton393，项目名称:linux，代码行数:23，代码来源:spi-imx.c

示例11: bcm2835aux_spi_prepare_message

static int bcm2835aux_spi_prepare_message(struct spi_master *master,
					  struct spi_message *msg)
{
	struct spi_device *spi = msg->spi;
	struct bcm2835aux_spi *bs = spi_master_get_devdata(master);

	bs->cntl[0] = BCM2835_AUX_SPI_CNTL0_ENABLE |
		      BCM2835_AUX_SPI_CNTL0_VAR_WIDTH |
		      BCM2835_AUX_SPI_CNTL0_MSBF_OUT;
	bs->cntl[1] = BCM2835_AUX_SPI_CNTL1_MSBF_IN;

	/* handle all the modes */
	if (spi->mode & SPI_CPOL) {
		bs->cntl[0] |= BCM2835_AUX_SPI_CNTL0_CPOL;
		bs->cntl[0] |= BCM2835_AUX_SPI_CNTL0_OUT_RISING;
	} else {
		bs->cntl[0] |= BCM2835_AUX_SPI_CNTL0_IN_RISING;
	}
	bcm2835aux_wr(bs, BCM2835_AUX_SPI_CNTL1, bs->cntl[1]);
	bcm2835aux_wr(bs, BCM2835_AUX_SPI_CNTL0, bs->cntl[0]);

	return 0;
}

开发者ID:grate-driver，项目名称:linux，代码行数:23，代码来源:spi-bcm2835aux.c

示例12: p3_enable_clk

static int p3_enable_clk(struct p3_dev *p3_device)
{
	int ret_val = 0;
	struct spi_device *spidev = NULL;
	struct s3c64xx_spi_driver_data *sdd = NULL;

	/* for defence MULTI-OPEN */
	if (p3_device->enabled_clk) {
		P3_ERR_MSG("%s - clock was ALREADY enabled!\n", __func__);
		return -EBUSY;
	}

	spin_lock_irq(&p3_device->ese_spi_lock);
	spidev = spi_dev_get(p3_device->spi);
	spin_unlock_irq(&p3_device->ese_spi_lock);
	if (spidev == NULL) {
		P3_ERR_MSG("%s - Failed to get spi dev.\n", __func__);
		return -1;
	}

	sdd = spi_master_get_devdata(spidev->master);
	if (!sdd){
		P3_ERR_MSG("%s - Failed to get spi dev.\n", __func__);
		return -EFAULT;
	}
	pm_runtime_get_sync(&sdd->pdev->dev); /* Enable clk */

	/* set spi clock rate */
	clk_set_rate(sdd->src_clk, spidev->max_speed_hz * 2);
#ifdef FEATURE_ESE_WAKELOCK
	wake_lock(&p3_device->ese_lock);
#endif
	p3_device->enabled_clk = true;
	spi_dev_put(spidev);

	return ret_val;
}

开发者ID:MikeForeskin，项目名称:Vindicator-S6，代码行数:37，代码来源:ese_p3.c

示例13: sifive_spi_transfer_one

static int
sifive_spi_transfer_one(struct spi_master *master, struct spi_device *device,
			struct spi_transfer *t)
{
	struct sifive_spi *spi = spi_master_get_devdata(master);
	int poll = sifive_spi_prep_transfer(spi, device, t);
	const u8 *tx_ptr = t->tx_buf;
	u8 *rx_ptr = t->rx_buf;
	unsigned int remaining_words = t->len;

	while (remaining_words) {
		unsigned int n_words = min(remaining_words, spi->fifo_depth);
		unsigned int i;

		/* Enqueue n_words for transmission */
		for (i = 0; i < n_words; i++)
			sifive_spi_tx(spi, tx_ptr++);

		if (rx_ptr) {
			/* Wait for transmission + reception to complete */
			sifive_spi_write(spi, SIFIVE_SPI_REG_RXMARK,
					 n_words - 1);
			sifive_spi_wait(spi, SIFIVE_SPI_IP_RXWM, poll);

			/* Read out all the data from the RX FIFO */
			for (i = 0; i < n_words; i++)
				sifive_spi_rx(spi, rx_ptr++);
		} else {
			/* Wait for transmission to complete */
			sifive_spi_wait(spi, SIFIVE_SPI_IP_TXWM, poll);
		}

		remaining_words -= n_words;
	}

	return 0;
}

开发者ID:Anjali05，项目名称:linux，代码行数:37，代码来源:spi-sifive.c

示例14: p61_set_clk

static int p61_set_clk(struct p61_dev *p61_device)
{
    int ret_val = 0;
    struct spi_device *spidev = NULL;
    struct s3c64xx_spi_driver_data *sdd = NULL;

    spin_lock_irq(&p61_device->ese_spi_lock);
    spidev = spi_dev_get(p61_device->spi);
    spin_unlock_irq(&p61_device->ese_spi_lock);
    if (spidev == NULL) {
        pr_err("%s - Failed to get spi dev\n", __func__);
        return -1;
    }

    spidev->max_speed_hz = P61_SPI_CLOCK;
    sdd = spi_master_get_devdata(spidev->master);
    if (!sdd) {
        pr_err("%s - Failed to get spi dev.\n", __func__);
        return -1;
    }
    pm_runtime_get_sync(&sdd->pdev->dev); /* Enable clk */

    /* set spi clock rate */
    clk_set_rate(sdd->src_clk, spidev->max_speed_hz * 2);

    p61_device->enabled_clk = true;
    spi_dev_put(spidev);

    //CS enable
    gpio_set_value(p61_device->cspin, 0);
    usleep_range(50, 70);
    if (!wake_lock_active(&p61_device->ese_lock)) {
        pr_info("%s: [NFC-ESE] wake lock.\n", __func__);
        wake_lock(&p61_device->ese_lock);
    }
    return ret_val;
}

开发者ID:zydroid，项目名称:kernel-g9208-s6，代码行数:37，代码来源:p61.c

示例15: omap2_mcspi_txrx_dma

static unsigned
omap2_mcspi_txrx_dma(struct spi_device *spi, struct spi_transfer *xfer)
{
	struct omap2_mcspi	*mcspi;
	struct omap2_mcspi_cs	*cs = spi->controller_state;
	struct omap2_mcspi_dma  *mcspi_dma;
	unsigned int		count, c, bytes_per_transfer;
	unsigned long		base, tx_reg, rx_reg;
	int			word_len, data_type, element_count;
	int			elements = 0, frame_count, sync_type;
	u32			l, irq_enable;
	u8			* rx;
	const u8		* tx;

	mcspi = spi_master_get_devdata(spi->master);
	mcspi_dma = &mcspi->dma_channels[spi->chip_select];
	l = mcspi_cached_chconf0(spi);

	count = xfer->len;
	c = count;
	word_len = cs->word_len;

	base = cs->phys;
	tx_reg = base + mcspi->regs[OMAP2_MCSPI_TX0];
	rx_reg = base + mcspi->regs[OMAP2_MCSPI_RX0];
	rx = xfer->rx_buf;
	tx = xfer->tx_buf;

	if (word_len <= 8) {
		data_type = OMAP_DMA_DATA_TYPE_S8;
		element_count = count;
		bytes_per_transfer = 1;
	} else if (word_len <= 16) {
		data_type = OMAP_DMA_DATA_TYPE_S16;
		element_count = count >> 1;
		bytes_per_transfer = 2;
	} else /* word_len <= 32 */ {

开发者ID:CunningLogic，项目名称:asteroid_smart_kernel，代码行数:37，代码来源:omap2_mcspi.c

示例16: bcm53xxspi_transfer_one

static int bcm53xxspi_transfer_one(struct spi_master *master,
				   struct spi_device *spi,
				   struct spi_transfer *t)
{
	struct bcm53xxspi *b53spi = spi_master_get_devdata(master);
	u8 *buf;
	size_t left;

	if (t->tx_buf) {
		buf = (u8 *)t->tx_buf;
		left = t->len;
		while (left) {
			size_t to_write = min_t(size_t, 16, left);
			bool cont = left - to_write > 0;

			bcm53xxspi_buf_write(b53spi, buf, to_write, cont);
			left -= to_write;
			buf += to_write;
		}
	}

	if (t->rx_buf) {
		buf = (u8 *)t->rx_buf;
		left = t->len;
		while (left) {
			size_t to_read = min_t(size_t, 16 - b53spi->read_offset,
					       left);
			bool cont = left - to_read > 0;

			bcm53xxspi_buf_read(b53spi, buf, to_read, cont);
			left -= to_read;
			buf += to_read;
		}
	}

	return 0;
}

开发者ID:Abioy，项目名称:kasan，代码行数:37，代码来源:spi-bcm53xx.c

示例17: dspi_txrx_transfer

static int dspi_txrx_transfer(struct spi_device *spi, struct spi_transfer *t)
{
	struct fsl_dspi *dspi = spi_master_get_devdata(spi->master);
	dspi->cur_transfer = t;
	dspi->cur_chip = spi_get_ctldata(spi);
	dspi->cs = spi->chip_select;
	dspi->void_write_data = dspi->cur_chip->void_write_data;

	dspi->dataflags = 0;
	dspi->tx = (void *)t->tx_buf;
	dspi->tx_end = dspi->tx + t->len;
	dspi->rx = t->rx_buf;
	dspi->rx_end = dspi->rx + t->len;
	dspi->len = t->len;

	if (!dspi->rx)
		dspi->dataflags |= TRAN_STATE_RX_VOID;

	if (!dspi->tx)
		dspi->dataflags |= TRAN_STATE_TX_VOID;

	writel(dspi->cur_chip->mcr_val, dspi->base + SPI_MCR);
	writel(dspi->cur_chip->ctar_val, dspi->base + SPI_CTAR(dspi->cs));
	writel(SPI_RSER_EOQFE, dspi->base + SPI_RSER);

	if (t->speed_hz)
		writel(dspi->cur_chip->ctar_val,
				dspi->base + SPI_CTAR(dspi->cs));

	dspi_transfer_write(dspi);

	if (wait_event_interruptible(dspi->waitq, dspi->waitflags))
		dev_err(&dspi->pdev->dev, "wait transfer complete fail!\n");
	dspi->waitflags = 0;

	return t->len - dspi->len;
}

开发者ID:AeroGirl，项目名称:VAR-SOM-AM33-SDK7-Kernel，代码行数:37，代码来源:spi-fsl-dspi.c

示例18: efm32_spi_txrx_bufs

static int efm32_spi_txrx_bufs(struct spi_device *spi, struct spi_transfer *t)
{
	struct efm32_spi_ddata *ddata = spi_master_get_devdata(spi->master);
	int ret = -EBUSY;

	spin_lock_irq(&ddata->lock);

	if (ddata->tx_buf || ddata->rx_buf)
		goto out_unlock;

	ddata->tx_buf = t->tx_buf;
	ddata->rx_buf = t->rx_buf;
	ddata->tx_len = ddata->rx_len =
		t->len * DIV_ROUND_UP(t->bits_per_word, 8);

	efm32_spi_filltx(ddata);

	reinit_completion(&ddata->done);

	efm32_spi_write32(ddata, REG_IF_TXBL | REG_IF_RXDATAV, REG_IEN);

	spin_unlock_irq(&ddata->lock);

	wait_for_completion(&ddata->done);

	spin_lock_irq(&ddata->lock);

	ret = t->len - max(ddata->tx_len, ddata->rx_len);

	efm32_spi_write32(ddata, 0, REG_IEN);
	ddata->tx_buf = ddata->rx_buf = NULL;

out_unlock:
	spin_unlock_irq(&ddata->lock);

	return ret;
}

开发者ID:020gzh，项目名称:linux，代码行数:37，代码来源:spi-efm32.c

示例19: omap2_mcspi_rx_dma

static unsigned
omap2_mcspi_rx_dma(struct spi_device *spi, struct spi_transfer *xfer,
				struct dma_slave_config cfg,
				unsigned es)
{
	struct omap2_mcspi	*mcspi;
	struct omap2_mcspi_dma  *mcspi_dma;
	unsigned int		count, transfer_reduction = 0;
	struct scatterlist	*sg_out[2];
	int			nb_sizes = 0, out_mapped_nents[2], ret, x;
	size_t			sizes[2];
	u32			l;
	int			elements = 0;
	int			word_len, element_count;
	struct omap2_mcspi_cs	*cs = spi->controller_state;
	void __iomem		*chstat_reg = cs->base + OMAP2_MCSPI_CHSTAT0;

	mcspi = spi_master_get_devdata(spi->master);
	mcspi_dma = &mcspi->dma_channels[spi->chip_select];
	count = xfer->len;

	/*
	 *  In the "End-of-Transfer Procedure" section for DMA RX in OMAP35x TRM
	 *  it mentions reducing DMA transfer length by one element in master
	 *  normal mode.
	 */
	if (mcspi->fifo_depth == 0)
		transfer_reduction = es;

	word_len = cs->word_len;
	l = mcspi_cached_chconf0(spi);

	if (word_len <= 8)
		element_count = count;
	else if (word_len <= 16)
		element_count = count >> 1;
	else /* word_len <= 32 */

开发者ID:Anjali05，项目名称:linux，代码行数:37，代码来源:spi-omap2-mcspi.c

示例20: omap2_mcspi_tx_dma

static void omap2_mcspi_tx_dma(struct spi_device *spi,
				struct spi_transfer *xfer,
				struct dma_slave_config cfg)
{
	struct omap2_mcspi	*mcspi;
	struct omap2_mcspi_dma  *mcspi_dma;
	unsigned int		count;

	mcspi = spi_master_get_devdata(spi->master);
	mcspi_dma = &mcspi->dma_channels[spi->chip_select];
	count = xfer->len;

	if (mcspi_dma->dma_tx) {
		struct dma_async_tx_descriptor *tx;
		struct scatterlist sg;

		dmaengine_slave_config(mcspi_dma->dma_tx, &cfg);

		sg_init_table(&sg, 1);
		sg_dma_address(&sg) = xfer->tx_dma;
		sg_dma_len(&sg) = xfer->len;

		tx = dmaengine_prep_slave_sg(mcspi_dma->dma_tx, &sg, 1,
		DMA_MEM_TO_DEV, DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
		if (tx) {
			tx->callback = omap2_mcspi_tx_callback;
			tx->callback_param = spi;
			dmaengine_submit(tx);
		} else {
			/* FIXME: fall back to PIO? */
		}
	}
	dma_async_issue_pending(mcspi_dma->dma_tx);
	omap2_mcspi_set_dma_req(spi, 0, 1);

}

开发者ID:imcek，项目名称:BEAGLEBONE_BSP，代码行数:36，代码来源:spi-omap2-mcspi.c

注：本文中的spi_master_get_devdata函数示例由纯净天空整理自Github/MSDocs等源码及文档管理平台，相关代码片段筛选自各路编程大神贡献的开源项目，源码版权归原作者所有，传播和使用请参考对应项目的License；未经允许，请勿转载。

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C++ spi_master_get_devdata函数代码示例

示例1: omap2_mcspi_txrx_dma

示例2: xilinx_spi_setup_transfer

示例3: omap2_mcspi_rx_dma

示例4: omap2_mcspi_set_master_mode

示例5: spi_stm_remove

示例6: spi_qup_remove

示例7: spi_ppc4xx_txrx

示例8: xilinx_spi_chipselect

示例9: spi_bitbang_bufs

示例10: mx21_config

示例11: bcm2835aux_spi_prepare_message

示例12: p3_enable_clk

示例13: sifive_spi_transfer_one

示例14: p61_set_clk

示例15: omap2_mcspi_txrx_dma

示例16: bcm53xxspi_transfer_one

示例17: dspi_txrx_transfer

示例18: efm32_spi_txrx_bufs

示例19: omap2_mcspi_rx_dma

示例20: omap2_mcspi_tx_dma

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