[PATCH 1/3] ARM: timer: fix checkpatch warnings

[PATCH 1/3] ARM: timer: fix checkpatch warnings

[Stephen Warren]

From: Stephen Warren <swarren@nvidia.com>

This prevents checkpatch complaining when this file is moved in a later
patch.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
---
 arch/arm/mach-tegra/timer.c |    7 +++----
 1 files changed, 3 insertions(+), 4 deletions(-)

diff --git a/arch/arm/mach-tegra/timer.c b/arch/arm/mach-tegra/timer.c
index e5deb54..026bad4 100644
--- a/arch/arm/mach-tegra/timer.c
+++ b/arch/arm/mach-tegra/timer.c
@@ -185,8 +185,7 @@ static void __init tegra_init_timer(void)
 
 	clk = clk_get_sys("timer", NULL);
 	if (IS_ERR(clk)) {
-		pr_warn("Unable to get timer clock."
-			" Assuming 12Mhz input clock.\n");
+		pr_warn("Unable to get timer clock. Assuming 12Mhz input clock.\n");
 		rate = 12000000;
 	} else {
 		clk_prepare_enable(clk);
@@ -226,13 +225,13 @@ static void __init tegra_init_timer(void)
 
 	if (clocksource_mmio_init(timer_reg_base + TIMERUS_CNTR_1US,
 		"timer_us", 1000000, 300, 32, clocksource_mmio_readl_up)) {
-		printk(KERN_ERR "Failed to register clocksource\n");
+		pr_err("Failed to register clocksource\n");
 		BUG();
 	}
 
 	ret = setup_irq(tegra_timer_irq.irq, &tegra_timer_irq);
 	if (ret) {
-		printk(KERN_ERR "Failed to register timer IRQ: %d\n", ret);
+		pr_err("Failed to register timer IRQ: %d\n", ret);
 		BUG();
 	}
 
-- 
1.7.0.4

[PATCH 2/3] ARM: tegra: enhance timer.c to get IO address from device tree

[Stephen Warren]

From: Stephen Warren <swarren@nvidia.com>

Modify Tegra's timer code to parse the IO address from device tree,
hence removing the dependency on <mach/iomap.h>. This will allow the
driver to be moved to drivers/clocksource/.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
---
 arch/arm/mach-tegra/timer.c |   32 ++++++++++++++++++++++++++++----
 1 files changed, 28 insertions(+), 4 deletions(-)

diff --git a/arch/arm/mach-tegra/timer.c b/arch/arm/mach-tegra/timer.c
index 026bad4..e4863f3 100644
--- a/arch/arm/mach-tegra/timer.c
+++ b/arch/arm/mach-tegra/timer.c
@@ -26,6 +26,7 @@
 #include <linux/clocksource.h>
 #include <linux/clk.h>
 #include <linux/io.h>
+#include <linux/of_address.h>
 #include <linux/of_irq.h>
 
 #include <asm/mach/time.h>
@@ -33,8 +34,6 @@
 #include <asm/sched_clock.h>
 
 #include "board.h"
-#include "clock.h"
-#include "iomap.h"
 
 #define RTC_SECONDS            0x08
 #define RTC_SHADOW_SECONDS     0x0c
@@ -52,8 +51,8 @@
 #define TIMER_PTV 0x0
 #define TIMER_PCR 0x4
 
-static void __iomem *timer_reg_base = IO_ADDRESS(TEGRA_TMR1_BASE);
-static void __iomem *rtc_base = IO_ADDRESS(TEGRA_RTC_BASE);
+static void __iomem *timer_reg_base;
+static void __iomem *rtc_base;
 
 static struct timespec persistent_ts;
 static u64 persistent_ms, last_persistent_ms;
@@ -164,6 +163,11 @@ static const struct of_device_id timer_match[] __initconst = {
 	{}
 };
 
+static const struct of_device_id rtc_match[] __initconst = {
+	{ .compatible = "nvidia,tegra20-rtc" },
+	{}
+};
+
 static void __init tegra_init_timer(void)
 {
 	struct device_node *np;
@@ -177,6 +181,12 @@ static void __init tegra_init_timer(void)
 		BUG();
 	}
 
+	timer_reg_base = of_iomap(np, 0);
+	if (!timer_reg_base) {
+		pr_err("Can't map timer registers");
+		BUG();
+	}
+
 	tegra_timer_irq.irq = irq_of_parse_and_map(np, 2);
 	if (tegra_timer_irq.irq <= 0) {
 		pr_err("Failed to map timer IRQ\n");
@@ -192,6 +202,20 @@ static void __init tegra_init_timer(void)
 		rate = clk_get_rate(clk);
 	}
 
+	of_node_put(np);
+
+	np = of_find_matching_node(NULL, rtc_match);
+	if (!np) {
+		pr_err("Failed to find RTC DT node\n");
+		BUG();
+	}
+
+	rtc_base = of_iomap(np, 0);
+	if (!rtc_base) {
+		pr_err("Can't map RTC registers");
+		BUG();
+	}
+
 	/*
 	 * rtc registers are used by read_persistent_clock, keep the rtc clock
 	 * enabled
-- 
1.7.0.4

[PATCH 3/3] ARM: tegra: move timer.c to drivers/clocksource/

[Stephen Warren]

From: Stephen Warren <swarren@nvidia.com>

Move arch/arm/mach-tegra/timer.c to drivers/clocksource/tegra20_timer.c
so that the code is co-located with other clocksource drivers, and to
reduce the size of the mach-tegra directory.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
---
 arch/arm/mach-tegra/Makefile                       |    1 -
 arch/arm/mach-tegra/board-dt-tegra20.c             |    3 +-
 arch/arm/mach-tegra/board-dt-tegra30.c             |    3 +-
 arch/arm/mach-tegra/board.h                        |    1 -
 drivers/clocksource/Makefile                       |    1 +
 .../timer.c => drivers/clocksource/tegra20_timer.c |    7 +----
 include/linux/tegra20_timer.h                      |   24 ++++++++++++++++++++
 7 files changed, 31 insertions(+), 9 deletions(-)
 rename arch/arm/mach-tegra/timer.c => drivers/clocksource/tegra20_timer.c (98%)
 create mode 100644 include/linux/tegra20_timer.h

diff --git a/arch/arm/mach-tegra/Makefile b/arch/arm/mach-tegra/Makefile
index 9aa653b..4a59038 100644
--- a/arch/arm/mach-tegra/Makefile
+++ b/arch/arm/mach-tegra/Makefile
@@ -2,7 +2,6 @@ obj-y                                   += common.o
 obj-y                                   += io.o
 obj-y                                   += irq.o
 obj-y                                   += clock.o
-obj-y                                   += timer.o
 obj-y					+= fuse.o
 obj-y					+= pmc.o
 obj-y					+= flowctrl.o
diff --git a/arch/arm/mach-tegra/board-dt-tegra20.c b/arch/arm/mach-tegra/board-dt-tegra20.c
index 0419056..b66f7e7 100644
--- a/arch/arm/mach-tegra/board-dt-tegra20.c
+++ b/arch/arm/mach-tegra/board-dt-tegra20.c
@@ -33,6 +33,7 @@
 #include <linux/i2c.h>
 #include <linux/i2c-tegra.h>
 #include <linux/usb/tegra_usb_phy.h>
+#include <linux/tegra20_timer.h>
 
 #include <asm/hardware/gic.h>
 #include <asm/mach-types.h>
@@ -184,7 +185,7 @@ DT_MACHINE_START(TEGRA_DT, "nVidia Tegra20 (Flattened Device Tree)")
 	.init_early	= tegra20_init_early,
 	.init_irq	= tegra_dt_init_irq,
 	.handle_irq	= gic_handle_irq,
-	.timer		= &tegra_sys_timer,
+	.timer		= &tegra20_sys_timer,
 	.init_machine	= tegra_dt_init,
 	.init_late	= tegra_dt_init_late,
 	.restart	= tegra_assert_system_reset,
diff --git a/arch/arm/mach-tegra/board-dt-tegra30.c b/arch/arm/mach-tegra/board-dt-tegra30.c
index 7368ebd..a47d19e 100644
--- a/arch/arm/mach-tegra/board-dt-tegra30.c
+++ b/arch/arm/mach-tegra/board-dt-tegra30.c
@@ -29,6 +29,7 @@
 #include <linux/of_fdt.h>
 #include <linux/of_irq.h>
 #include <linux/of_platform.h>
+#include <linux/tegra20_timer.h>
 
 #include <asm/mach/arch.h>
 #include <asm/hardware/gic.h>
@@ -92,7 +93,7 @@ DT_MACHINE_START(TEGRA30_DT, "NVIDIA Tegra30 (Flattened Device Tree)")
 	.init_early	= tegra30_init_early,
 	.init_irq	= tegra_dt_init_irq,
 	.handle_irq	= gic_handle_irq,
-	.timer		= &tegra_sys_timer,
+	.timer		= &tegra20_sys_timer,
 	.init_machine	= tegra30_dt_init,
 	.init_late	= tegra_init_late,
 	.restart	= tegra_assert_system_reset,
diff --git a/arch/arm/mach-tegra/board.h b/arch/arm/mach-tegra/board.h
index 91fbe73..da8f5a3 100644
--- a/arch/arm/mach-tegra/board.h
+++ b/arch/arm/mach-tegra/board.h
@@ -55,5 +55,4 @@ static inline int harmony_pcie_init(void) { return 0; }
 
 void __init tegra_paz00_wifikill_init(void);
 
-extern struct sys_timer tegra_sys_timer;
 #endif
diff --git a/drivers/clocksource/Makefile b/drivers/clocksource/Makefile
index 603be36..a09c598 100644
--- a/drivers/clocksource/Makefile
+++ b/drivers/clocksource/Makefile
@@ -14,5 +14,6 @@ obj-$(CONFIG_DW_APB_TIMER_OF)	+= dw_apb_timer_of.o
 obj-$(CONFIG_CLKSRC_DBX500_PRCMU)	+= clksrc-dbx500-prcmu.o
 obj-$(CONFIG_ARMADA_370_XP_TIMER)	+= time-armada-370-xp.o
 obj-$(CONFIG_ARCH_BCM2835)	+= bcm2835_timer.o
+obj-$(CONFIG_ARCH_TEGRA)	+= tegra20_timer.o
 
 obj-$(CONFIG_CLKSRC_ARM_GENERIC)	+= arm_generic.o
diff --git a/arch/arm/mach-tegra/timer.c b/drivers/clocksource/tegra20_timer.c
similarity index 98%
rename from arch/arm/mach-tegra/timer.c
rename to drivers/clocksource/tegra20_timer.c
index e4863f3..996ceb8 100644
--- a/arch/arm/mach-tegra/timer.c
+++ b/drivers/clocksource/tegra20_timer.c
@@ -1,6 +1,4 @@
 /*
- * arch/arch/mach-tegra/timer.c
- *
  * Copyright (C) 2010 Google, Inc.
  *
  * Author:
@@ -17,6 +15,7 @@
  *
  */
 
+#include <linux/tegra20_timer.h>
 #include <linux/init.h>
 #include <linux/err.h>
 #include <linux/time.h>
@@ -33,8 +32,6 @@
 #include <asm/smp_twd.h>
 #include <asm/sched_clock.h>
 
-#include "board.h"
-
 #define RTC_SECONDS            0x08
 #define RTC_SHADOW_SECONDS     0x0c
 #define RTC_MILLISECONDS       0x10
@@ -273,7 +270,7 @@ static void __init tegra_init_timer(void)
 	register_persistent_clock(NULL, tegra_read_persistent_clock);
 }
 
-struct sys_timer tegra_sys_timer = {
+struct sys_timer tegra20_sys_timer = {
 	.init = tegra_init_timer,
 };
 
diff --git a/include/linux/tegra20_timer.h b/include/linux/tegra20_timer.h
new file mode 100644
index 0000000..aa9b9c4
--- /dev/null
+++ b/include/linux/tegra20_timer.h
@@ -0,0 +1,24 @@
+/*
+ * 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 __TEGRA20_TIMER_H
+#define __TEGRA20_TIMER_H
+
+#include <asm/mach/time.h>
+
+extern struct sys_timer tegra20_sys_timer;
+
+#endif
-- 
1.7.0.4

[PATCH 1/3] ARM: timer: fix checkpatch warnings

[Stephen Warren]

On 10/23/2012 12:28 PM, Stephen Warren wrote:
> This prevents checkpatch complaining when this file is moved in a later
> patch.

I have applied patches 1 and 2 to Tegra's tree for 3.8. I'll hold off on
patch 3 for a bit. I need to see if it could benefit from similar rework
that drivers/irqchip recently received from Thomas Petazzoni.