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spi: sun4i: Simplify reg writes using set/clrbits_le32

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Update the existing register writes using setbits_le32 and
clrbits_le32 in required places.

Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
This commit is contained in:
Jagan Teki 2019-02-27 20:02:07 +05:30
parent 82111469a5
commit 8cbf09ba1c
1 changed files with 8 additions and 13 deletions
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21
drivers/spi/sun4i_spi.c
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@ -283,20 +283,18 @@ static int sun4i_spi_claim_bus(struct udevice *dev)
{
struct sun4i_spi_priv *priv = dev_get_priv(dev->parent);
writel(SUN4I_CTL_ENABLE | SUN4I_CTL_MASTER | SUN4I_CTL_TP |
SUN4I_CTL_CS_MANUAL | SUN4I_CTL_CS_ACTIVE_LOW,
&priv->regs->ctl);
setbits_le32(&priv->regs->ctl, SUN4I_CTL_ENABLE |
SUN4I_CTL_MASTER | SUN4I_CTL_TP |
SUN4I_CTL_CS_MANUAL | SUN4I_CTL_CS_ACTIVE_LOW);
return 0;
}
static int sun4i_spi_release_bus(struct udevice *dev)
{
struct sun4i_spi_priv *priv = dev_get_priv(dev->parent);
u32 reg;
reg = readl(&priv->regs->ctl);
reg &= ~SUN4I_CTL_ENABLE;
writel(reg, &priv->regs->ctl);
clrbits_le32(&priv->regs->ctl, SUN4I_CTL_ENABLE);
return 0;
}
@ -309,7 +307,7 @@ static int sun4i_spi_xfer(struct udevice *dev, unsigned int bitlen,
struct dm_spi_slave_platdata *slave_plat = dev_get_parent_platdata(dev);
u32 len = bitlen / 8;
u32 reg, rx_fifocnt;
u32 rx_fifocnt;
u8 nbytes;
int ret;
@ -324,10 +322,8 @@ static int sun4i_spi_xfer(struct udevice *dev, unsigned int bitlen,
if (flags & SPI_XFER_BEGIN)
sun4i_spi_set_cs(bus, slave_plat->cs, true);
reg = readl(&priv->regs->ctl);
/* Reset FIFOs */
writel(reg | SUN4I_CTL_RF_RST | SUN4I_CTL_TF_RST, &priv->regs->ctl);
setbits_le32(&priv->regs->ctl, SUN4I_CTL_RF_RST | SUN4I_CTL_TF_RST);
while (len) {
/* Setup the transfer now... */
@ -341,8 +337,7 @@ static int sun4i_spi_xfer(struct udevice *dev, unsigned int bitlen,
sun4i_spi_fill_fifo(priv, nbytes);
/* Start the transfer */
reg = readl(&priv->regs->ctl);
writel(reg | SUN4I_CTL_XCH, &priv->regs->ctl);
setbits_le32(&priv->regs->ctl, SUN4I_CTL_XCH);
/* Wait till RX FIFO to be empty */
ret = readl_poll_timeout(&priv->regs->fifo_sta, rx_fifocnt,