ARM: tegra: add function to read chipid
Add function to read chip id from APB MISC registers. This function
will also get called from clock driver to flush write operations on
apb bus.
Signed-off-by: Prashant Gaikwad <pgaikwad@nvidia.com>
Signed-off-by: Stephen Warren <swarren@nvidia.com>
diff --git a/arch/arm/mach-tegra/fuse.c b/arch/arm/mach-tegra/fuse.c
index 8121742..f7db078 100644
--- a/arch/arm/mach-tegra/fuse.c
+++ b/arch/arm/mach-tegra/fuse.c
@@ -20,6 +20,7 @@
#include <linux/kernel.h>
#include <linux/io.h>
#include <linux/export.h>
+#include <linux/tegra-soc.h>
#include "fuse.h"
#include "iomap.h"
@@ -105,6 +106,11 @@
tegra_core_process_id = (reg >> 12) & 3;
}
+u32 tegra_read_chipid(void)
+{
+ return readl_relaxed(IO_ADDRESS(TEGRA_APB_MISC_BASE) + 0x804);
+}
+
void tegra_init_fuse(void)
{
u32 id;
@@ -119,7 +125,7 @@
reg = tegra_apb_readl(TEGRA_APB_MISC_BASE + STRAP_OPT);
tegra_bct_strapping = (reg & RAM_ID_MASK) >> RAM_CODE_SHIFT;
- id = readl_relaxed(IO_ADDRESS(TEGRA_APB_MISC_BASE) + 0x804);
+ id = tegra_read_chipid();
tegra_chip_id = (id >> 8) & 0xff;
switch (tegra_chip_id) {