ramips: disable spi full duplex on mt7621

Signed-off-by: John Crispin <john@phrozen.org>

target/linux/ramips/patches-4.14/0043-spi-add-mt7621-support.patch

@@ -11,8 +11,10 @@ Signed-off-by: John Crispin <blogic@openwrt.org>
  3 files changed, 487 insertions(+)
  create mode 100644 drivers/spi/spi-mt7621.c
 
---- a/drivers/spi/Kconfig
-+++ b/drivers/spi/Kconfig
+Index: linux-4.14.37/drivers/spi/Kconfig
+===================================================================
+--- linux-4.14.37.orig/drivers/spi/Kconfig
++++ linux-4.14.37/drivers/spi/Kconfig
 @@ -569,6 +569,12 @@ config SPI_RT2880
  	help
  	  This selects a driver for the Ralink RT288x/RT305x SPI Controller.
@@ -26,8 +28,10 @@ Signed-off-by: John Crispin <blogic@openwrt.org>
  config SPI_S3C24XX
  	tristate "Samsung S3C24XX series SPI"
  	depends on ARCH_S3C24XX
---- a/drivers/spi/Makefile
-+++ b/drivers/spi/Makefile
+Index: linux-4.14.37/drivers/spi/Makefile
+===================================================================
+--- linux-4.14.37.orig/drivers/spi/Makefile
++++ linux-4.14.37/drivers/spi/Makefile
 @@ -60,6 +60,7 @@ obj-$(CONFIG_SPI_MPC512x_PSC)		+= spi-mp
  obj-$(CONFIG_SPI_MPC52xx_PSC)		+= spi-mpc52xx-psc.o
  obj-$(CONFIG_SPI_MPC52xx)		+= spi-mpc52xx.o
@@ -36,9 +40,11 @@ Signed-off-by: John Crispin <blogic@openwrt.org>
  obj-$(CONFIG_SPI_MXS)			+= spi-mxs.o
  obj-$(CONFIG_SPI_NUC900)		+= spi-nuc900.o
  obj-$(CONFIG_SPI_OC_TINY)		+= spi-oc-tiny.o
+Index: linux-4.14.37/drivers/spi/spi-mt7621.c
+===================================================================
 --- /dev/null
-+++ b/drivers/spi/spi-mt7621.c
-@@ -0,0 +1,488 @@
++++ linux-4.14.37/drivers/spi/spi-mt7621.c
+@@ -0,0 +1,494 @@
 +/*
 + * spi-mt7621.c -- MediaTek MT7621 SPI controller driver
 + *
@@ -131,9 +137,11 @@ Signed-off-by: John Crispin <blogic@openwrt.org>
 +
 +	master |= 7 << 29;
 +	master |= 1 << 2;
++#ifdef CONFIG_SOC_MT7620
 +	if (duplex)
 +		master |= 1 << 10;
 +	else
++#endif
 +		master &= ~(1 << 10);
 +
 +	mt7621_spi_write(rs, MT7621_SPI_MASTER, master);
@@ -308,6 +316,7 @@ Signed-off-by: John Crispin <blogic@openwrt.org>
 +	return 0;
 +}
 +
++#ifdef CONFIG_SOC_MT7620
 +static int mt7621_spi_transfer_full_duplex(struct spi_master *master,
 +					   struct spi_message *m)
 +{
@@ -392,15 +401,18 @@ Signed-off-by: John Crispin <blogic@openwrt.org>
 +
 +	return 0;
 +}
++#endif
 +
 +static int mt7621_spi_transfer_one_message(struct spi_master *master,
 +					   struct spi_message *m)
 +{
 +	struct spi_device *spi = m->spi;
++#ifdef CONFIG_SOC_MT7620
 +	int cs = spi->chip_select;
 +
 +	if (cs)
 +		return mt7621_spi_transfer_full_duplex(master, m);
++#endif
 +	return mt7621_spi_transfer_half_duplex(master, m);
 +}
 +