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spi: dw: Remove spi_enable_chip

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This function does nothing but wrap dw_write.

Signed-off-by: Sean Anderson <seanga2@gmail.com>
Reviewed-by: Jagan Teki <jagan@amarulasolutions.com>
This commit is contained in:
Sean Anderson 2020-10-16 18:57:48 -04:00 committed by Jagan Teki
parent 3004034989
commit 934beab882
1 changed files with 6 additions and 11 deletions
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17
drivers/spi/designware_spi.c
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@ -171,17 +171,12 @@ static int dw_spi_ofdata_to_platdata(struct udevice *bus)
return request_gpio_cs(bus);
}
static inline void spi_enable_chip(struct dw_spi_priv *priv, int enable)
{
dw_write(priv, DW_SPI_SSIENR, (enable ? 1 : 0));
}
/* Restart the controller, disable all interrupts, clean rx fifo */
static void spi_hw_init(struct udevice *bus, struct dw_spi_priv *priv)
{
spi_enable_chip(priv, 0);
dw_write(priv, DW_SPI_SSIENR, 0);
dw_write(priv, DW_SPI_IMR, 0xff);
spi_enable_chip(priv, 1);
dw_write(priv, DW_SPI_SSIENR, 1);
/*
* Try to detect the FIFO depth if not set by interface driver,
@ -438,7 +433,7 @@ static int dw_spi_xfer(struct udevice *dev, unsigned int bitlen,
priv->rx_end = priv->rx + priv->len;
/* Disable controller before writing control registers */
spi_enable_chip(priv, 0);
dw_write(priv, DW_SPI_SSIENR, 0);
dev_dbg(dev, "cr0=%08x rx=%p tx=%p len=%d [bytes]\n", cr0, rx, tx,
priv->len);
@ -455,7 +450,7 @@ static int dw_spi_xfer(struct udevice *dev, unsigned int bitlen,
dw_write(priv, DW_SPI_SER, 1 << cs);
/* Enable controller after writing control registers */
spi_enable_chip(priv, 1);
dw_write(priv, DW_SPI_SSIENR, 1);
/* Start transfer in a polling loop */
ret = poll_transfer(priv);
@ -490,7 +485,7 @@ static int dw_spi_set_speed(struct udevice *bus, uint speed)
speed = plat->frequency;
/* Disable controller before writing control registers */
spi_enable_chip(priv, 0);
dw_write(priv, DW_SPI_SSIENR, 0);
/* clk_div doesn't support odd number */
clk_div = priv->bus_clk_rate / speed;
@ -498,7 +493,7 @@ static int dw_spi_set_speed(struct udevice *bus, uint speed)
dw_write(priv, DW_SPI_BAUDR, clk_div);
/* Enable controller after writing control registers */
spi_enable_chip(priv, 1);
dw_write(priv, DW_SPI_SSIENR, 1);
priv->freq = speed;
dev_dbg(bus, "speed=%d clk_div=%d\n", priv->freq, clk_div);