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ARM: imx5: retrieve iim base from device tree

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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>
This commit is contained in:
Shawn Guo 2014-05-19 22:23:43 +08:00
parent 1f84e906f8
commit ee18a7154e
1 changed files with 21 additions and 4 deletions
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25
arch/arm/mach-imx/cpu-imx5.c
View file

@ -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: