[U-Boot] [PATCH v2 3/3] arc: use timer driver for ARC boards

[Vlad Zakharov]

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

It removes arch/arc/lib/time.c file and selects CONFIG_CLK,
CONFIG_TIMER and CONFIG_ARC_TIMER options for all ARC boards by default.
Therefore we remove CONFIG_CLK option from less common axs101 and
axs103 defconfigs.

Also it removes legacy CONFIG_SYS_TIMER_RATE config symbol from
axs10x.h, tb100.h and nsim.h configs files as it is no longer required.

Signed-off-by: Vlad Zakharov <vzakhar at synopsys.com>
Reviewed-by: Simon Glass <sjg at chromium.org>
---
No changes compared to v1

 arch/Kconfig             |  3 +++
 arch/arc/lib/Makefile    |  1 -
 arch/arc/lib/timer.c     | 24 ------------------------
 configs/axs101_defconfig |  1 -
 configs/axs103_defconfig |  1 -
 include/configs/axs10x.h |  2 --
 include/configs/nsim.h   |  5 -----
 include/configs/tb100.h  |  5 -----
 8 files changed, 3 insertions(+), 39 deletions(-)
 delete mode 100644 arch/arc/lib/timer.c

diff --git a/arch/Kconfig b/arch/Kconfig
index ffc7b45..1d2f4ef 100644
--- a/arch/Kconfig
+++ b/arch/Kconfig
@@ -12,6 +12,9 @@ config ARC
 	bool "ARC architecture"
 	select HAVE_PRIVATE_LIBGCC
 	select SUPPORT_OF_CONTROL
+	select CLK
+	select TIMER
+	select ARC_TIMER
 
 config ARM
 	bool "ARM architecture"
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/configs/axs101_defconfig b/configs/axs101_defconfig
index a8983df..45dd5c4 100644
--- a/configs/axs101_defconfig
+++ b/configs/axs101_defconfig
@@ -19,7 +19,6 @@ CONFIG_OF_CONTROL=y
 CONFIG_OF_EMBED=y
 CONFIG_NET_RANDOM_ETHADDR=y
 CONFIG_DM=y
-CONFIG_CLK=y
 CONFIG_SYS_I2C_DW=y
 CONFIG_MMC_DW=y
 CONFIG_DM_ETH=y
diff --git a/configs/axs103_defconfig b/configs/axs103_defconfig
index 2a0e3cc..e2f6265 100644
--- a/configs/axs103_defconfig
+++ b/configs/axs103_defconfig
@@ -18,7 +18,6 @@ CONFIG_OF_CONTROL=y
 CONFIG_OF_EMBED=y
 CONFIG_NET_RANDOM_ETHADDR=y
 CONFIG_DM=y
-CONFIG_CLK=y
 CONFIG_SYS_I2C_DW=y
 CONFIG_MMC_DW=y
 CONFIG_DM_ETH=y
diff --git a/include/configs/axs10x.h b/include/configs/axs10x.h
index 2dd9d31..9dbc9de 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