[U-Boot] [PATCH v4 2/2] arc: use timer driver instead of arch/arc/lib/timer.c

[Vlad Zakharov]

This commit replaces legacy timer code with usage of arc timer
driver.

Also it adds timer0 device tree node with corresponding
"clock-frequency" property.

Therefore we remove legacy CONFIG_SYS_TIMER_RATE config symbol
that is not longer required.

Furthermore the commit selects CONFIG_TIMER and CONFIG_ARC_TIMER
by default when selecting ARC architecture.

Signed-off-by: Vlad Zakharov <vzakhar at synopsys.com>
Reviewed-by: Simon Glass <sjg at chromium.org>
---
Changes v3..v4:
 - Remove CONFIG_SYS_TIMER_RATE not only from "axs10x.h" but also
from "nsim.h" and "tb100.h".

 arch/Kconfig               |  2 ++
 arch/arc/dts/skeleton.dtsi |  6 ++++++
 arch/arc/lib/Makefile      |  1 -
 arch/arc/lib/timer.c       | 24 ------------------------
 include/configs/axs10x.h   |  2 --
 include/configs/nsim.h     |  5 -----
 include/configs/tb100.h    |  5 -----
 7 files changed, 8 insertions(+), 37 deletions(-)
 delete mode 100644 arch/arc/lib/timer.c

diff --git a/arch/Kconfig b/arch/Kconfig
index ffc7b45..56fa70e 100644
--- a/arch/Kconfig
+++ b/arch/Kconfig
@@ -12,6 +12,8 @@ config ARC
 	bool "ARC architecture"
 	select HAVE_PRIVATE_LIBGCC
 	select SUPPORT_OF_CONTROL
+	select TIMER
+	select ARC_TIMER
 
 config ARM
 	bool "ARM architecture"
diff --git a/arch/arc/dts/skeleton.dtsi b/arch/arc/dts/skeleton.dtsi
index b41d241..3e93d697 100644
--- a/arch/arc/dts/skeleton.dtsi
+++ b/arch/arc/dts/skeleton.dtsi
@@ -10,4 +10,10 @@
 	chosen { };
 	aliases { };
 	memory { device_type = "memory"; reg = <0 0>; };
+
+	timer at 0 {
+			compatible = "snps,arc-timer";
+			clock-frequency = <100000000>;
+			reg = <0>;
+	};
 };
diff --git a/arch/arc/lib/Makefile b/arch/arc/lib/Makefile
index eb62b3c..12097bf 100644
--- a/arch/arc/lib/Makefile
+++ b/arch/arc/lib/Makefile
@@ -18,7 +18,6 @@ obj-y += memcmp.o
 obj-y += memcpy-700.o
 obj-y += memset.o
 obj-y += reset.o
-obj-y += timer.o
 obj-y += ints_low.o
 obj-y += init_helpers.o
 
diff --git a/arch/arc/lib/timer.c b/arch/arc/lib/timer.c
deleted file mode 100644
index a0acbbc..0000000
--- a/arch/arc/lib/timer.c
+++ /dev/null
@@ -1,24 +0,0 @@
-/*
- * Copyright (C) 2013-2014 Synopsys, Inc. All rights reserved.
- *
- * SPDX-License-Identifier:	GPL-2.0+
- */
-
-#include <asm/arcregs.h>
-
-#define NH_MODE	(1 << 1)	/* Disable timer if CPU is halted */
-
-int timer_init(void)
-{
-	write_aux_reg(ARC_AUX_TIMER0_CTRL, NH_MODE);
-	/* Set max value for counter/timer */
-	write_aux_reg(ARC_AUX_TIMER0_LIMIT, 0xffffffff);
-	/* Set initial count value and restart counter/timer */
-	write_aux_reg(ARC_AUX_TIMER0_CNT, 0);
-	return 0;
-}
-
-unsigned long timer_read_counter(void)
-{
-	return read_aux_reg(ARC_AUX_TIMER0_CNT);
-}
diff --git a/include/configs/axs10x.h b/include/configs/axs10x.h
index 3546c8d..0476223 100644
--- a/include/configs/axs10x.h
+++ b/include/configs/axs10x.h
@@ -11,8 +11,6 @@
 /*
  *  CPU configuration
  */
-#define CONFIG_SYS_TIMER_RATE		CONFIG_SYS_CLK_FREQ
-
 #define ARC_FPGA_PERIPHERAL_BASE	0xE0000000
 #define ARC_APB_PERIPHERAL_BASE		0xF0000000
 #define ARC_DWMMC_BASE			(ARC_FPGA_PERIPHERAL_BASE + 0x15000)
diff --git a/include/configs/nsim.h b/include/configs/nsim.h
index 1edc560..630d529 100644
--- a/include/configs/nsim.h
+++ b/include/configs/nsim.h
@@ -10,11 +10,6 @@
 #include <linux/sizes.h>
 
 /*
- *  CPU configuration
- */
-#define CONFIG_SYS_TIMER_RATE		CONFIG_SYS_CLK_FREQ
-
-/*
  * Memory configuration
  */
 #define CONFIG_SYS_MONITOR_BASE		CONFIG_SYS_TEXT_BASE
diff --git a/include/configs/tb100.h b/include/configs/tb100.h
index 39bb5b3..856f8cb 100644
--- a/include/configs/tb100.h
+++ b/include/configs/tb100.h
@@ -10,11 +10,6 @@
 #include <linux/sizes.h>
 
 /*
- *  CPU configuration
- */
-#define CONFIG_SYS_TIMER_RATE		CONFIG_SYS_CLK_FREQ
-
-/*
  * Memory configuration
  */
 #define CONFIG_SYS_MONITOR_BASE		CONFIG_SYS_TEXT_BASE
-- 
2.7.4