ramips: make the mt7628 spi driver work for both cs lines

Signed-off-by: John Crispin <blogic@openwrt.org>
Backport of r46951

git-svn-id: svn://svn.openwrt.org/openwrt/branches/chaos_calmer@47087 3c298f89-4303-0410-b956-a3cf2f4a3e73

diff --git a/target/linux/ramips/patches-3.18/0061-SPI-ralink-add-mt7621-SoC-spi-driver.patch b/target/linux/ramips/patches-3.18/0061-SPI-ralink-add-mt7621-SoC-spi-driver.patch
index 9ee8893..762462f 100644 (file)
--- a/target/linux/ramips/patches-3.18/0061-SPI-ralink-add-mt7621-SoC-spi-driver.patch
+++ b/target/linux/ramips/patches-3.18/0061-SPI-ralink-add-mt7621-SoC-spi-driver.patch
@@ -1,6 +1,6 @@
 --- a/drivers/spi/Kconfig
 +++ b/drivers/spi/Kconfig
-@@ -439,6 +439,12 @@ config SPI_RT2880
+@@ -439,6 +439,12 @@
        help
          This selects a driver for the Ralink RT288x/RT305x SPI Controller.
  
@@ -15,7 +15,7 @@
        depends on ARCH_S3C24XX
 --- a/drivers/spi/Makefile
 +++ b/drivers/spi/Makefile
-@@ -46,6 +46,7 @@ obj-$(CONFIG_SPI_LM70_LLP)           += spi-lm70l
+@@ -46,6 +46,7 @@
  obj-$(CONFIG_SPI_MPC512x_PSC)         += spi-mpc512x-psc.o
  obj-$(CONFIG_SPI_MPC52xx_PSC)         += spi-mpc52xx-psc.o
  obj-$(CONFIG_SPI_MPC52xx)             += spi-mpc52xx.o
@@ -25,7 +25,7 @@
  obj-$(CONFIG_SPI_OC_TINY)             += spi-oc-tiny.o
 --- /dev/null
 +++ b/drivers/spi/spi-mt7621.c
-@@ -0,0 +1,315 @@
+@@ -0,0 +1,314 @@
 +/*
 + * spi-mt7621.c -- MediaTek MT7621 SPI controller driver
 + *
@@ -111,12 +111,11 @@
 +static void mt7621_spi_set_cs(struct spi_device *spi, int enable)
 +{
 +      struct mt7621_spi *rs = spidev_to_mt7621_spi(spi);
-+      u32 polar = mt7621_spi_read(rs, MT7621_SPI_POLAR);
++      int cs = spi->chip_select;
++      u32 polar = 0;
 +
 +      if (enable)
-+              polar |= 1;
-+      else
-+              polar &= ~1;
++              polar = BIT(cs);
 +      mt7621_spi_write(rs, MT7621_SPI_POLAR, polar);
 +}
 +
@@ -290,7 +289,7 @@
 +      master->transfer_one_message = mt7621_spi_transfer_one_message;
 +      master->bits_per_word_mask = SPI_BPW_MASK(8);
 +      master->dev.of_node = pdev->dev.of_node;
-+      master->num_chipselect = 1;
++      master->num_chipselect = 2;
 +
 +      dev_set_drvdata(&pdev->dev, master);
 +