From: Prashant Gaikwad <pgaikwad@nvidia.com>
To: <mturquette@linaro.org>, <swarren@nvidia.com>
Cc: <linux-kernel@vger.kernel.org>,
<linux-arm-kernel@lists.infradead.org>,
Prashant Gaikwad <pgaikwad@nvidia.com>
Subject: [PATCH v3 1/9] ARM: tegra: Add function to read chipid
Date: Fri, 4 Jan 2013 15:10:45 +0530 [thread overview]
Message-ID: <1357292453-28418-2-git-send-email-pgaikwad@nvidia.com> (raw)
In-Reply-To: <1357292453-28418-1-git-send-email-pgaikwad@nvidia.com>
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>
---
arch/arm/mach-tegra/fuse.c | 12 ++++++++++--
include/linux/tegra-soc.h | 22 ++++++++++++++++++++++
2 files changed, 32 insertions(+), 2 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..2cd8ac9 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 +106,14 @@ static void tegra_get_process_id(void)
tegra_core_process_id = (reg >> 12) & 3;
}
+void tegra_read_chipid(void)
+{
+ u32 reg;
+
+ reg = readl_relaxed(IO_ADDRESS(TEGRA_APB_MISC_BASE) + 0x804);
+ tegra_chip_id = (reg >> 8) & 0xff;
+}
+
void tegra_init_fuse(void)
{
u32 id;
@@ -119,8 +128,7 @@ 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);
- tegra_chip_id = (id >> 8) & 0xff;
+ tegra_read_chipid();
switch (tegra_chip_id) {
case TEGRA20:
diff --git a/include/linux/tegra-soc.h b/include/linux/tegra-soc.h
new file mode 100644
index 0000000..dcbc14c
--- /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_
+
+void tegra_read_chipid(void);
+
+#endif /* __LINUX_TEGRA_SOC_H_ */
--
1.7.4.1
next prev parent reply other threads:[~2013-01-04 9:41 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-01-04 9:40 [PATCH v3 0/9] Migrate Tegra to common clock framework Prashant Gaikwad
2013-01-04 9:40 ` Prashant Gaikwad [this message]
2013-01-04 9:40 ` [PATCH v3 2/9] clk: tegra: Add tegra specific clocks Prashant Gaikwad
2013-01-04 9:40 ` [PATCH v3 3/9] arm: tegra: Move tegra_cpu_car.h to linux/clk/tegra.h Prashant Gaikwad
2013-01-04 9:40 ` [PATCH v3 4/9] ARM: tegra: Define Tegra20 CAR binding Prashant Gaikwad
2013-01-04 9:40 ` [PATCH v3 5/9] ARM: Tegra: Define Tegra30 " Prashant Gaikwad
2013-01-04 9:40 ` [PATCH v3 6/9] clk: tegra: add clock support for tegra20 Prashant Gaikwad
2013-01-04 9:40 ` [PATCH v3 7/9] clk: tegra: add clock support for tegra30 Prashant Gaikwad
2013-01-04 9:40 ` [PATCH v3 8/9] arm: tegra: Migrate to new clock code Prashant Gaikwad
2013-01-04 9:40 ` [PATCH v3 9/9] arm: tegra: Remove legacy " Prashant Gaikwad
2013-01-04 11:20 ` [PATCH v3 0/9] Migrate Tegra to common clock framework Joseph Lo
2013-01-04 17:22 ` Stephen Warren
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