diff options
| author | Jagan Teki <jagan@amarulasolutions.com> | 2019-02-27 20:02:07 +0530 |
|---|---|---|
| committer | Jagan Teki <jagan@amarulasolutions.com> | 2019-03-04 18:08:56 +0530 |
| commit | 8cbf09ba1cfdc7b47ead3ff330e9a7bc57bda4ab (patch) | |
| tree | 434842fa118d8b000f06c55e5f8aaff0dcbe9bd5 | |
| parent | 82111469a5451adeb14413dc744c96f1bf13c758 (diff) | |
spi: sun4i: Simplify reg writes using set/clrbits_le32
Update the existing register writes using setbits_le32 and
clrbits_le32 in required places.
Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
| -rw-r--r-- | drivers/spi/sun4i_spi.c | 21 |
1 files changed, 8 insertions, 13 deletions
diff --git a/drivers/spi/sun4i_spi.c b/drivers/spi/sun4i_spi.c index f5f2d5635a..0b1663038c 100644 --- a/drivers/spi/sun4i_spi.c +++ b/drivers/spi/sun4i_spi.c @@ -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, |