[PATCH v3 2/6] ARM: mx25: Retrieve IIM base from dt

Fabio Estevam
2015-03-13T13:31:54Z

We should use dt to retrieve the IIM base address.

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
---
Changes since v2:
- Only changed the order of this patch as per Shawn's suggestion

arch/arm/mach-imx/cpu-imx25.c | 11 ++++++++++-
1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/arch/arm/mach-imx/cpu-imx25.c b/arch/arm/mach-imx/cpu-imx25.c
index 96ec64b..d0ad67e 100644
--- a/arch/arm/mach-imx/cpu-imx25.c
+++ b/arch/arm/mach-imx/cpu-imx25.c
@@ -11,6 +11,8 @@
*/
#include <linux/module.h>
#include <linux/io.h>
+#include <linux/of.h>
+#include <linux/of_address.h>

#include "iim.h"
#include "hardware.h"
@@ -20,8 +22,15 @@ static int mx25_cpu_rev = -1;
static int mx25_read_cpu_rev(void)
{
u32 rev;
+ void __iomem *iim_base;
+ struct device_node *np;
+
+ np = of_find_compatible_node(NULL, NULL, "fsl,imx25-iim");
+ iim_base = of_iomap(np, 0);
+ BUG_ON(!iim_base);
+ rev = readl(iim_base + MXC_IIMSREV);
+ iounmap(iim_base);

- rev = __raw_readl(MX25_IO_ADDRESS(MX25_IIM_BASE_ADDR + MXC_IIMSREV));
switch (rev) {
case 0x00:
return IMX_CHIP_REVISION_1_0;
--
1.9.1