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ramips: disable spi full duplex on mt7621

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Signed-off-by: John Crispin <john@phrozen.org>
This commit is contained in:
John Crispin 2018-05-05 08:25:18 +02:00
parent bc5283381c
commit 6e0ae87a98
1 changed files with 18 additions and 6 deletions
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24
target/linux/ramips/patches-4.14/0043-spi-add-mt7621-support.patch
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@ -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);
+}
+