[PATCH v4 1/9] 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
---
arch/arm/mach-tegra/fuse.c |8 +++-
include/linux/tegra-soc.h | 22 ++
2 files changed, 29 insertions(+), 1 deletions(-)
create mode 100644 include/linux/tegra-soc.h
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
#include
#include
+#include
#include "fuse.h"
#include "iomap.h"
@@ -105,6 +106,11 @@ static void tegra_get_process_id(void)
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 @@ void tegra_init_fuse(void)
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) {
diff --git a/include/linux/tegra-soc.h b/include/linux/tegra-soc.h
new file mode 100644
index 000..95f611d
--- /dev/null
+++ b/include/linux/tegra-soc.h
@@ -0,0 +1,22 @@
+/*
+ * Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see
[PATCH v4 1/9] 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 pgaik...@nvidia.com
---
arch/arm/mach-tegra/fuse.c |8 +++-
include/linux/tegra-soc.h | 22 ++
2 files changed, 29 insertions(+), 1 deletions(-)
create mode 100644 include/linux/tegra-soc.h
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 @@ static void tegra_get_process_id(void)
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 @@ void tegra_init_fuse(void)
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) {
diff --git a/include/linux/tegra-soc.h b/include/linux/tegra-soc.h
new file mode 100644
index 000..95f611d
--- /dev/null
+++ b/include/linux/tegra-soc.h
@@ -0,0 +1,22 @@
+/*
+ * Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see http://www.gnu.org/licenses/.
+ */
+
+#ifndef __LINUX_TEGRA_SOC_H_
+#define __LINUX_TEGRA_SOC_H_
+
+u32 tegra_read_chipid(void);
+
+#endif /* __LINUX_TEGRA_SOC_H_ */
--
1.7.4.1
--
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