dm: spi: Correct SPI claim/release_bus() methods

These methods should be passed a slave device, not a bus. This matches the
old SPI interface. It is important to know which device is claiming the bus
so passing a bus is not that useful.

Reported-by: Haikun Wang <haikun.wang@freescale.com>
Signed-off-by: Simon Glass <sjg@chromium.org>
Tested-by: Peng Fan <Peng.Fan@freescale.com>
Reviewed-by: Jagannadha Sutradharudu Teki <jagannadh.teki@gmail.com>

drivers/spi/exynos_spi.c

@@ -296,8 +296,9 @@ static int exynos_spi_probe(struct udevice *bus)
 	return 0;
 }
 
-static int exynos_spi_claim_bus(struct udevice *bus)
+static int exynos_spi_claim_bus(struct udevice *dev)
 {
+	struct udevice *bus = dev->parent;
 	struct exynos_spi_priv *priv = dev_get_priv(bus);
 
 	exynos_pinmux_config(priv->periph_id, PINMUX_FLAG_NONE);
@@ -308,8 +309,9 @@ static int exynos_spi_claim_bus(struct udevice *bus)
 	return 0;
 }
 
-static int exynos_spi_release_bus(struct udevice *bus)
+static int exynos_spi_release_bus(struct udevice *dev)
 {
+	struct udevice *bus = dev->parent;
 	struct exynos_spi_priv *priv = dev_get_priv(bus);
 
 	spi_flush_fifo(priv->regs);

drivers/spi/spi-uclass.c

@@ -67,7 +67,7 @@ int spi_claim_bus(struct spi_slave *slave)
 	if (ret)
 		return ret;
 
-	return ops->claim_bus ? ops->claim_bus(bus) : 0;
+	return ops->claim_bus ? ops->claim_bus(dev) : 0;
 }
 
 void spi_release_bus(struct spi_slave *slave)
@@ -77,7 +77,7 @@ void spi_release_bus(struct spi_slave *slave)
 	struct dm_spi_ops *ops = spi_get_ops(bus);
 
 	if (ops->release_bus)
-		ops->release_bus(bus);
+		ops->release_bus(dev);
 }
 
 int spi_xfer(struct spi_slave *slave, unsigned int bitlen,

drivers/spi/tegra114_spi.c

@@ -153,8 +153,9 @@ static int tegra114_spi_probe(struct udevice *bus)
 	return 0;
 }
 
-static int tegra114_spi_claim_bus(struct udevice *bus)
+static int tegra114_spi_claim_bus(struct udevice *dev)
 {
+	struct udevice *bus = dev->parent;
 	struct tegra114_spi_priv *priv = dev_get_priv(bus);
 	struct spi_regs *regs = priv->regs;
 

drivers/spi/tegra20_sflash.c

@@ -125,8 +125,9 @@ static int tegra20_sflash_probe(struct udevice *bus)
 	return 0;
 }
 
-static int tegra20_sflash_claim_bus(struct udevice *bus)
+static int tegra20_sflash_claim_bus(struct udevice *dev)
 {
+	struct udevice *bus = dev->parent;
 	struct tegra20_sflash_priv *priv = dev_get_priv(bus);
 	struct spi_regs *regs = priv->regs;
 	u32 reg;

drivers/spi/tegra20_slink.c

@@ -141,8 +141,9 @@ static int tegra30_spi_probe(struct udevice *bus)
 	return 0;
 }
 
-static int tegra30_spi_claim_bus(struct udevice *bus)
+static int tegra30_spi_claim_bus(struct udevice *dev)
 {
+	struct udevice *bus = dev->parent;
 	struct tegra30_spi_priv *priv = dev_get_priv(bus);
 	struct spi_regs *regs = priv->regs;
 	u32 reg;

include/spi.h

@@ -386,12 +386,12 @@ struct dm_spi_ops {
 	 * allowed to claim the same bus for several slaves without releasing
 	 * the bus in between.
 	 *
-	 * @bus:	The SPI slave
+	 * @dev:	The SPI slave
 	 *
 	 * Returns: 0 if the bus was claimed successfully, or a negative value
 	 * if it wasn't.
 	 */
-	int (*claim_bus)(struct udevice *bus);
+	int (*claim_bus)(struct udevice *dev);
 
 	/**
 	 * Release the SPI bus
@@ -400,9 +400,9 @@ struct dm_spi_ops {
 	 * all transfers have finished. It may disable any SPI hardware as
 	 * appropriate.
 	 *
-	 * @bus:	The SPI slave
+	 * @dev:	The SPI slave
 	 */
-	int (*release_bus)(struct udevice *bus);
+	int (*release_bus)(struct udevice *dev);
 
 	/**
 	 * Set the word length for SPI transactions
@@ -414,7 +414,7 @@ struct dm_spi_ops {
 	 *
 	 * Returns: 0 on success, -ve on failure.
 	 */
-	int (*set_wordlen)(struct udevice *bus, unsigned int wordlen);
+	int (*set_wordlen)(struct udevice *dev, unsigned int wordlen);
 
 	/**
 	 * SPI transfer