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

Pull i2c fixes from Wolfram Sang:
 "A core fix for ACPI matching and two driver bugfixes"

* 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
  i2c: iproc: Fix shifting 31 bits
  i2c: rcar: in slave mode, clear NACK earlier
  i2c: acpi: Remove dead code, i.e. i2c_acpi_match_device()
  i2c: core: Don't fail PRP0001 enumeration when no ID table exist

Author: torvalds

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

@@ -720,7 +720,7 @@ static int bcm_iproc_i2c_xfer_internal(struct bcm_iproc_i2c_dev *iproc_i2c,
 
 			/* mark the last byte */
 			if (!process_call && (i == msg->len - 1))
-				val |= 1 << M_TX_WR_STATUS_SHIFT;
+				val |= BIT(M_TX_WR_STATUS_SHIFT);
 
 			iproc_i2c_wr_reg(iproc_i2c, M_TX_OFFSET, val);
 		}
@@ -738,7 +738,7 @@ static int bcm_iproc_i2c_xfer_internal(struct bcm_iproc_i2c_dev *iproc_i2c,
 		 */
 		addr = i2c_8bit_addr_from_msg(msg);
 		/* mark it the last byte out */
-		val = addr | (1 << M_TX_WR_STATUS_SHIFT);
+		val = addr | BIT(M_TX_WR_STATUS_SHIFT);
 		iproc_i2c_wr_reg(iproc_i2c, M_TX_OFFSET, val);
 	}
 

drivers/i2c/busses/i2c-rcar.c

@@ -590,6 +590,7 @@ static bool rcar_i2c_slave_irq(struct rcar_i2c_priv *priv)
 	/* master sent stop */
 	if (ssr_filtered & SSR) {
 		i2c_slave_event(priv->slave, I2C_SLAVE_STOP, &value);
+		rcar_i2c_write(priv, ICSCR, SIE | SDBS); /* clear our NACK */
 		rcar_i2c_write(priv, ICSIER, SAR);
 		rcar_i2c_write(priv, ICSSR, ~SSR & 0xff);
 	}

drivers/i2c/i2c-core-acpi.c

@@ -276,16 +276,6 @@ void i2c_acpi_register_devices(struct i2c_adapter *adap)
 		dev_warn(&adap->dev, "failed to enumerate I2C slaves\n");
 }
 
-const struct acpi_device_id *
-i2c_acpi_match_device(const struct acpi_device_id *matches,
-		      struct i2c_client *client)
-{
-	if (!(client && matches))
-		return NULL;
-
-	return acpi_match_device(matches, &client->dev);
-}
-
 static const struct acpi_device_id i2c_acpi_force_400khz_device_ids[] = {
 	/*
 	 * These Silead touchscreen controllers only work at 400KHz, for

drivers/i2c/i2c-core-base.c

@@ -480,7 +480,7 @@ static int i2c_device_probe(struct device *dev)
 	 * or ACPI ID table is supplied for the probing device.
 	 */
 	if (!driver->id_table &&
-	    !i2c_acpi_match_device(dev->driver->acpi_match_table, client) &&
+	    !acpi_driver_match_device(dev, dev->driver) &&
 	    !i2c_of_match_device(dev->driver->of_match_table, client)) {
 		status = -ENODEV;
 		goto put_sync_adapter;

drivers/i2c/i2c-core.h

@@ -59,20 +59,11 @@ static inline int __i2c_check_suspended(struct i2c_adapter *adap)
 }
 
 #ifdef CONFIG_ACPI
-const struct acpi_device_id *
-i2c_acpi_match_device(const struct acpi_device_id *matches,
-		      struct i2c_client *client);
 void i2c_acpi_register_devices(struct i2c_adapter *adap);
 
 int i2c_acpi_get_irq(struct i2c_client *client);
 #else /* CONFIG_ACPI */
 static inline void i2c_acpi_register_devices(struct i2c_adapter *adap) { }
-static inline const struct acpi_device_id *
-i2c_acpi_match_device(const struct acpi_device_id *matches,
-		      struct i2c_client *client)
-{
-	return NULL;
-}
 
 static inline int i2c_acpi_get_irq(struct i2c_client *client)
 {