[U-Boot] [PATCH 2/8] rockchip: spi: remove unused code and fields in priv

[Philipp Tomsich]

Even though the priv-structure and the claim-bus function contain
logic for 16bit frames and for unidirectional transfer modes, neither
of these is used anywhere in the driver.

This removes the unused (as in "has no effect") logic and fields.

Signed-off-by: Philipp Tomsich <philipp.tomsich at theobroma-systems.com>
---

 drivers/spi/rk_spi.c | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/drivers/spi/rk_spi.c b/drivers/spi/rk_spi.c
index 4153240..1df497d 100644
--- a/drivers/spi/rk_spi.c
+++ b/drivers/spi/rk_spi.c
@@ -40,11 +40,8 @@ struct rockchip_spi_priv {
 	unsigned int max_freq;
 	unsigned int mode;
 	ulong last_transaction_us;	/* Time of last transaction end */
-	u8 bits_per_word;		/* max 16 bits per word */
-	u8 n_bytes;
 	unsigned int speed_hz;
 	unsigned int last_speed_hz;
-	unsigned int tmode;
 	uint input_rate;
 };
 
@@ -268,8 +265,6 @@ static int rockchip_spi_probe(struct udevice *bus)
 	}
 	priv->input_rate = ret;
 	debug("%s: rate = %u\n", __func__, priv->input_rate);
-	priv->bits_per_word = 8;
-	priv->tmode = TMOD_TR; /* Tx & Rx */
 
 	return 0;
 }
@@ -279,29 +274,11 @@ static int rockchip_spi_claim_bus(struct udevice *dev)
 	struct udevice *bus = dev->parent;
 	struct rockchip_spi_priv *priv = dev_get_priv(bus);
 	struct rockchip_spi *regs = priv->regs;
-	u8 spi_dfs, spi_tf;
 	uint ctrlr0;
 
 	/* Disable the SPI hardware */
 	rkspi_enable_chip(regs, 0);
 
-	switch (priv->bits_per_word) {
-	case 8:
-		priv->n_bytes = 1;
-		spi_dfs = DFS_8BIT;
-		spi_tf = HALF_WORD_OFF;
-		break;
-	case 16:
-		priv->n_bytes = 2;
-		spi_dfs = DFS_16BIT;
-		spi_tf = HALF_WORD_ON;
-		break;
-	default:
-		debug("%s: unsupported bits: %dbits\n", __func__,
-		      priv->bits_per_word);
-		return -EPROTONOSUPPORT;
-	}
-
 	if (priv->speed_hz != priv->last_speed_hz)
 		rkspi_set_clk(priv, priv->speed_hz);
 
@@ -309,7 +286,7 @@ static int rockchip_spi_claim_bus(struct udevice *dev)
 	ctrlr0 = OMOD_MASTER << OMOD_SHIFT;
 
 	/* Data Frame Size */
-	ctrlr0 |= spi_dfs << DFS_SHIFT;
+	ctrlr0 |= DFS_8BIT << DFS_SHIFT;
 
 	/* set SPI mode 0..3 */
 	if (priv->mode & SPI_CPOL)
@@ -330,7 +307,7 @@ static int rockchip_spi_claim_bus(struct udevice *dev)
 	ctrlr0 |= FBM_MSB << FBM_SHIFT;
 
 	/* Byte and Halfword Transform */
-	ctrlr0 |= spi_tf << HALF_WORD_TX_SHIFT;
+	ctrlr0 |= HALF_WORD_OFF << HALF_WORD_TX_SHIFT;
 
 	/* Rxd Sample Delay */
 	ctrlr0 |= 0 << RXDSD_SHIFT;
@@ -339,7 +316,7 @@ static int rockchip_spi_claim_bus(struct udevice *dev)
 	ctrlr0 |= FRF_SPI << FRF_SHIFT;
 
 	/* Tx and Rx mode */
-	ctrlr0 |= (priv->tmode & TMOD_MASK) << TMOD_SHIFT;
+	ctrlr0 |= TMOD_TR << TMOD_SHIFT;
 
 	writel(ctrlr0, &regs->ctrlr0);
 
-- 
2.1.4