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Commit 8cc9dddd authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge branch 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux 

Pull i2c fixes from Wolfram Sang:
 "I2C has some pretty standard driver bugfixes and one minor cleanup"

* 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
  i2c: meson: Use complete() instead of complete_all()
  i2c: brcmstb: Use complete() instead of complete_all()
  i2c: bcm-kona: Use complete() instead of complete_all()
  i2c: bcm-iproc: Use complete() instead of complete_all()
  i2c: at91: fix support of the "alternative command" feature
  i2c: ocores: add missed clk_disable_unprepare() on failure paths
  i2c: cros-ec-tunnel: Fix usage of cros_ec_cmd_xfer()
  i2c: mux: demux-pinctrl: properly roll back when adding adapter fails
parents 43f4d36c 0268263f

drivers/i2c/busses/i2c-at91.c

+14 −10
Original line number Diff line number Diff line
@@ -38,6 +38,7 @@ 
#define AT91_I2C_TIMEOUT	msecs_to_jiffies(100)	/* transfer timeout */

#define AT91_I2C_DMA_THRESHOLD	8			/* enable DMA if transfer size is bigger than this threshold */

#define AUTOSUSPEND_TIMEOUT		2000

#define AT91_I2C_MAX_ALT_CMD_DATA_SIZE	256



/* AT91 TWI register definitions */

#define	AT91_TWI_CR		0x0000	/* Control Register */
@@ -141,6 +142,7 @@ struct at91_twi_dev { 
	unsigned twi_cwgr_reg;

	struct at91_twi_pdata *pdata;

	bool use_dma;

	bool use_alt_cmd;

	bool recv_len_abort;

	u32 fifo_size;

	struct at91_twi_dma dma;
@@ -269,7 +271,7 @@ static void at91_twi_write_next_byte(struct at91_twi_dev *dev) 


	/* send stop when last byte has been written */

	if (--dev->buf_len == 0)

		if (!dev->pdata->has_alt_cmd)

		if (!dev->use_alt_cmd)

			at91_twi_write(dev, AT91_TWI_CR, AT91_TWI_STOP);



	dev_dbg(dev->dev, "wrote 0x%x, to go %d\n", *dev->buf, dev->buf_len);
@@ -292,7 +294,7 @@ static void at91_twi_write_data_dma_callback(void *data) 
	 * we just have to enable TXCOMP one.

	 */

	at91_twi_write(dev, AT91_TWI_IER, AT91_TWI_TXCOMP);

	if (!dev->pdata->has_alt_cmd)

	if (!dev->use_alt_cmd)

		at91_twi_write(dev, AT91_TWI_CR, AT91_TWI_STOP);

}
@@ -410,7 +412,7 @@ static void at91_twi_read_next_byte(struct at91_twi_dev *dev) 
	}



	/* send stop if second but last byte has been read */

	if (!dev->pdata->has_alt_cmd && dev->buf_len == 1)

	if (!dev->use_alt_cmd && dev->buf_len == 1)

		at91_twi_write(dev, AT91_TWI_CR, AT91_TWI_STOP);



	dev_dbg(dev->dev, "read 0x%x, to go %d\n", *dev->buf, dev->buf_len);
@@ -426,7 +428,7 @@ static void at91_twi_read_data_dma_callback(void *data) 
	dma_unmap_single(dev->dev, sg_dma_address(&dev->dma.sg[0]),

			 dev->buf_len, DMA_FROM_DEVICE);



	if (!dev->pdata->has_alt_cmd) {

	if (!dev->use_alt_cmd) {

		/* The last two bytes have to be read without using dma */

		dev->buf += dev->buf_len - 2;

		dev->buf_len = 2;
@@ -443,7 +445,7 @@ static void at91_twi_read_data_dma(struct at91_twi_dev *dev) 
	struct dma_chan *chan_rx = dma->chan_rx;

	size_t buf_len;



	buf_len = (dev->pdata->has_alt_cmd) ? dev->buf_len : dev->buf_len - 2;

	buf_len = (dev->use_alt_cmd) ? dev->buf_len : dev->buf_len - 2;

	dma->direction = DMA_FROM_DEVICE;



	/* Keep in mind that we won't use dma to read the last two bytes */
@@ -651,7 +653,7 @@ static int at91_do_twi_transfer(struct at91_twi_dev *dev) 
		unsigned start_flags = AT91_TWI_START;



		/* if only one byte is to be read, immediately stop transfer */

		if (!has_alt_cmd && dev->buf_len <= 1 &&

		if (!dev->use_alt_cmd && dev->buf_len <= 1 &&

		    !(dev->msg->flags & I2C_M_RECV_LEN))

			start_flags |= AT91_TWI_STOP;

		at91_twi_write(dev, AT91_TWI_CR, start_flags);
@@ -745,7 +747,7 @@ static int at91_twi_xfer(struct i2c_adapter *adap, struct i2c_msg *msg, int num) 
	int ret;

	unsigned int_addr_flag = 0;

	struct i2c_msg *m_start = msg;

	bool is_read, use_alt_cmd = false;

	bool is_read;



	dev_dbg(&adap->dev, "at91_xfer: processing %d messages:\n", num);
@@ -768,14 +770,16 @@ static int at91_twi_xfer(struct i2c_adapter *adap, struct i2c_msg *msg, int num) 
		at91_twi_write(dev, AT91_TWI_IADR, internal_address);

	}



	dev->use_alt_cmd = false;

	is_read = (m_start->flags & I2C_M_RD);

	if (dev->pdata->has_alt_cmd) {

		if (m_start->len > 0) {

		if (m_start->len > 0 &&

		    m_start->len < AT91_I2C_MAX_ALT_CMD_DATA_SIZE) {

			at91_twi_write(dev, AT91_TWI_CR, AT91_TWI_ACMEN);

			at91_twi_write(dev, AT91_TWI_ACR,

				       AT91_TWI_ACR_DATAL(m_start->len) |

				       ((is_read) ? AT91_TWI_ACR_DIR : 0));

			use_alt_cmd = true;

			dev->use_alt_cmd = true;

		} else {

			at91_twi_write(dev, AT91_TWI_CR, AT91_TWI_ACMDIS);

		}
@@ -784,7 +788,7 @@ static int at91_twi_xfer(struct i2c_adapter *adap, struct i2c_msg *msg, int num) 
	at91_twi_write(dev, AT91_TWI_MMR,

		       (m_start->addr << 16) |

		       int_addr_flag |

		       ((!use_alt_cmd && is_read) ? AT91_TWI_MREAD : 0));

		       ((!dev->use_alt_cmd && is_read) ? AT91_TWI_MREAD : 0));



	dev->buf_len = m_start->len;

	dev->buf = m_start->buf;

drivers/i2c/busses/i2c-bcm-iproc.c

+1 −1
Original line number Diff line number Diff line
@@ -158,7 +158,7 @@ static irqreturn_t bcm_iproc_i2c_isr(int irq, void *data) 


	if (status & BIT(IS_M_START_BUSY_SHIFT)) {

		iproc_i2c->xfer_is_done = 1;

		complete_all(&iproc_i2c->done);

		complete(&iproc_i2c->done);

	}



	writel(status, iproc_i2c->base + IS_OFFSET);

drivers/i2c/busses/i2c-bcm-kona.c

+1 −1
Original line number Diff line number Diff line
@@ -229,7 +229,7 @@ static irqreturn_t bcm_kona_i2c_isr(int irq, void *devid) 
		       dev->base + TXFCR_OFFSET);



	writel(status & ~ISR_RESERVED_MASK, dev->base + ISR_OFFSET);

	complete_all(&dev->done);

	complete(&dev->done);



	return IRQ_HANDLED;

}

drivers/i2c/busses/i2c-brcmstb.c

+1 −1
Original line number Diff line number Diff line
@@ -228,7 +228,7 @@ static irqreturn_t brcmstb_i2c_isr(int irq, void *devid) 
		return IRQ_NONE;



	brcmstb_i2c_enable_disable_irq(dev, INT_DISABLE);

	complete_all(&dev->done);

	complete(&dev->done);



	dev_dbg(dev->device, "isr handled");

	return IRQ_HANDLED;

drivers/i2c/busses/i2c-cros-ec-tunnel.c

+1 −1
Original line number Diff line number Diff line
@@ -215,7 +215,7 @@ static int ec_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg i2c_msgs[], 
	msg->outsize = request_len;

	msg->insize = response_len;



	result = cros_ec_cmd_xfer(bus->ec, msg);

	result = cros_ec_cmd_xfer_status(bus->ec, msg);

	if (result < 0) {

		dev_err(dev, "Error transferring EC i2c message %d\n", result);

		goto exit;