rockchip: spi: remove unused code and fields in priv

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@theobroma-systems.com>

diff --git a/drivers/spi/rk_spi.c b/drivers/spi/rk_spi.c
index 41532403a4f1cd401345cdaaeddf1eb7a2732b31..1df497df6327a94adfe3e915a2a94dff76469cec 100644 (file)
--- 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);