linux-kernel - [PATCH] ARM: tegra: fuse: add fuctions to read speedo id and process id

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Message-ID: <1363660405-10668-1-git-send-email-dahuang@nvidia.com>
Date:	Tue, 19 Mar 2013 10:33:25 +0800
From:	Danny Huang <dahuang@...dia.com>
To:	<linux@....linux.org.uk>, <swarren@...dotorg.org>,
	<dahuang@...dia.com>, <ldewangan@...dia.com>,
	<pgaikwad@...dia.com>, <linux-arm-kernel@...ts.infradead.org>,
	<linux-tegra@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: [PATCH] ARM: tegra: fuse: add fuctions to read speedo id and process id

Add functions to read the speedo and process id of both cpu and soc.
There might be some drivers need the information as well.

Signed-off-by: Danny Huang <dahuang@...dia.com>
---
 arch/arm/mach-tegra/fuse.c | 24 ++++++++++++++++++++++++
 include/linux/tegra-soc.h  |  6 +++++-
 2 files changed, 29 insertions(+), 1 deletion(-)

diff --git a/arch/arm/mach-tegra/fuse.c b/arch/arm/mach-tegra/fuse.c
index f7db078..f0e356e 100644
--- a/arch/arm/mach-tegra/fuse.c
+++ b/arch/arm/mach-tegra/fuse.c
@@ -2,6 +2,7 @@
  * arch/arm/mach-tegra/fuse.c
  *
  * Copyright (C) 2010 Google, Inc.
+ * Copyright (c) 2013, NVIDIA CORPORATION.  All rights reserved.
  *
  * Author:
  *	Colin Cross <ccross@...roid.com>
@@ -161,3 +162,26 @@ unsigned long long tegra_chip_uid(void)
 	return (hi << 32ull) | lo;
 }
 EXPORT_SYMBOL(tegra_chip_uid);
+
+int tegra_get_cpu_process_id(void)
+{
+	return tegra_cpu_process_id;
+}
+
+int tegra_get_core_process_id(void)
+{
+	return tegra_core_process_id;
+}
+
+int tegra_get_cpu_speedo_id(void)
+{
+	if (tegra_chip_id == TEGRA20)
+		return -EINVAL;
+
+	return tegra_cpu_speedo_id;
+}
+
+int tegra_get_soc_speedo_id(void)
+{
+	return tegra_soc_speedo_id;
+}
diff --git a/include/linux/tegra-soc.h b/include/linux/tegra-soc.h
index 95f611d..b3e4b74 100644
--- a/include/linux/tegra-soc.h
+++ b/include/linux/tegra-soc.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2012, NVIDIA CORPORATION.  All rights reserved.
+ * Copyright (c) 2012,2013, 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,
@@ -18,5 +18,9 @@
 #define __LINUX_TEGRA_SOC_H_
 
 u32 tegra_read_chipid(void);
+int tegra_get_cpu_process_id(void);
+int tegra_get_core_process_id(void);
+int tegra_get_cpu_speedo_id(void);
+int tegra_get_soc_speedo_id(void);
 
 #endif /* __LINUX_TEGRA_SOC_H_ */
-- 
1.8.2

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