@@ -16,6 +16,8 @@
#include <linux/init.h>
#include <linux/module.h>
#include <linux/io.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
#include "hardware.h"
#include "common.h"
@@ -24,10 +26,26 @@ static int mx5_cpu_rev = -1;
#define IIM_SREV 0x24
+static u32 imx5_read_srev_reg(const char *compat)
+{
+ void __iomem *iim_base;
+ struct device_node *np;
+ u32 srev;
+
+ np = of_find_compatible_node(NULL, NULL, compat);
+ iim_base = of_iomap(np, 0);
+ WARN_ON(!iim_base);
+
+ srev = readl(iim_base + IIM_SREV) & 0xff;
+
+ iounmap(iim_base);
+
+ return srev;
+}
+
static int get_mx51_srev(void)
{
- void __iomem *iim_base = MX51_IO_ADDRESS(MX51_IIM_BASE_ADDR);
- u32 rev = readl(iim_base + IIM_SREV) & 0xff;
+ u32 rev = imx5_read_srev_reg("fsl,imx51-iim");
switch (rev) {
case 0x0:
@@ -77,8 +95,7 @@ int __init mx51_neon_fixup(void)
static int get_mx53_srev(void)
{
- void __iomem *iim_base = MX51_IO_ADDRESS(MX53_IIM_BASE_ADDR);
- u32 rev = readl(iim_base + IIM_SREV) & 0xff;
+ u32 rev = imx5_read_srev_reg("fsl,imx53-iim");
switch (rev) {
case 0x0:
Instead of using static define and mapping, the patch changes imx5 code that reads chip revision from IIM to retrieve base address from device tree and use dynamic mapping. Signed-off-by: Shawn Guo <shawn.guo@freescale.com> --- arch/arm/mach-imx/cpu-imx5.c | 25 +++++++++++++++++++++---- 1 file changed, 21 insertions(+), 4 deletions(-)