ramips: remove rt2880 spi lock and clean bit operation

Signed-off-by: Michael Lee <igvtee@gmail.com>
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@47574 3c298f89-4303-0410-b956-a3cf2f4a3e73

diff --git a/target/linux/ramips/patches-3.18/0050-SPI-ralink-add-Ralink-SoC-spi-driver.patch b/target/linux/ramips/patches-3.18/0050-SPI-ralink-add-Ralink-SoC-spi-driver.patch
index ca04a17..d6a462c 100644 (file)
--- a/target/linux/ramips/patches-3.18/0050-SPI-ralink-add-Ralink-SoC-spi-driver.patch
+++ b/target/linux/ramips/patches-3.18/0050-SPI-ralink-add-Ralink-SoC-spi-driver.patch
@@ -41,7 +41,7 @@ Acked-by: John Crispin <blogic@openwrt.org>
  spi-s3c24xx-hw-$(CONFIG_SPI_S3C24XX_FIQ) += spi-s3c24xx-fiq.o
 --- /dev/null
 +++ b/drivers/spi/spi-rt2880.c
-@@ -0,0 +1,493 @@
+@@ -0,0 +1,480 @@
 +/*
 + * spi-rt2880.c -- Ralink RT288x/RT305x SPI controller driver
 + *
@@ -174,7 +174,6 @@ Acked-by: John Crispin <blogic@openwrt.org>
 +      unsigned int            sys_freq;
 +      unsigned int            speed;
 +      struct clk              *clk;
-+      spinlock_t              lock;
 +};
 +
 +static inline struct rt2880_spi *spidev_to_rt2880_spi(struct spi_device *spi)
@@ -187,7 +186,8 @@ Acked-by: John Crispin <blogic@openwrt.org>
 +      return ioread32(rs->base + reg);
 +}
 +
-+static inline void rt2880_spi_write(struct rt2880_spi *rs, u32 reg, u32 val)
++static inline void rt2880_spi_write(struct rt2880_spi *rs, u32 reg,
++              const u32 val)
 +{
 +      iowrite32(val, rs->base + reg);
 +}
@@ -195,27 +195,15 @@ Acked-by: John Crispin <blogic@openwrt.org>
 +static inline void rt2880_spi_setbits(struct rt2880_spi *rs, u32 reg, u32 mask)
 +{
 +      void __iomem *addr = rs->base + reg;
-+      unsigned long flags;
-+      u32 val;
 +
-+      spin_lock_irqsave(&rs->lock, flags);
-+      val = ioread32(addr);
-+      val |= mask;
-+      iowrite32(val, addr);
-+      spin_unlock_irqrestore(&rs->lock, flags);
++      iowrite32((ioread32(addr) | mask), addr);
 +}
 +
 +static inline void rt2880_spi_clrbits(struct rt2880_spi *rs, u32 reg, u32 mask)
 +{
 +      void __iomem *addr = rs->base + reg;
-+      unsigned long flags;
-+      u32 val;
 +
-+      spin_lock_irqsave(&rs->lock, flags);
-+      val = ioread32(addr);
-+      val &= ~mask;
-+      iowrite32(val, addr);
-+      spin_unlock_irqrestore(&rs->lock, flags);
++      iowrite32((ioread32(addr) & ~mask), addr);
 +}
 +
 +static int rt2880_spi_baudrate_set(struct spi_device *spi, unsigned int speed)
@@ -488,7 +476,6 @@ Acked-by: John Crispin <blogic@openwrt.org>
 +      rs->master = master;
 +      rs->sys_freq = clk_get_rate(rs->clk);
 +      dev_dbg(&pdev->dev, "sys_freq: %u\n", rs->sys_freq);
-+      spin_lock_irqsave(&rs->lock, flags);
 +
 +      device_reset(&pdev->dev);
 +