On Fri, Jan 10, 2014 at 10:25:54AM +, David Laight wrote:
From: Peter Chen
...
+#ifdef
+static inline void imx28_ci_writel(u32 val, volatile void __iomem *addr)
+{
+ __asm__ (swp %0, %0, [%1] : : r(val), r(addr));
+}
+#else
+static inline void imx28_ci_writel(u32 val,
From: gre...@linuxfoundation.org
...
+#ifdef
+static inline void imx28_ci_writel(u32 val, volatile void __iomem *addr)
+{
+ __asm__ (swp %0, %0, [%1] : : r(val), r(addr));
+}
+#else
+static inline void imx28_ci_writel(u32 val, volatile void __iomem *addr)
+{
+}
On Fri, Jan 10, 2014 at 03:09:03PM +, David Laight wrote:
This code ought to be defensive against 'imx28_write_fix' being
set when the kernel isn't compiled with CONFIG_SOC_IMX28.
This can easily be done by changing the #else block to do an iowrite().
You missed the long email
According to Freescale imx28 Errata, ENGR119653 USB: ARM to USB
register error issue, All USB register write operations must
use the ARM SWP instruction. So, we implement special hw_write
and hw_test_and_clear for imx28.
Discussion for it at below:
