On Thursday, March 17, 2016 11:44 AM, Marek Vasut wrote:
On 03/17/2016 04:39 AM, Wills Wang wrote:
On Thursday, March 17, 2016 05:35 AM, Marek Vasut wrote:
On 03/16/2016 09:59 AM, Wills Wang wrote:
This patch add some common code for QCA/Atheros ath79 SOCs such as
DDR tuning, chip reset and CPU detection.
Signed-off-by: Wills Wang <[email protected]>
---
Changes in v8:
- Use setbits_be32
- Use lookup-table instead of big switch statement for CPU detection
Good stuff, minor nits below.
[...]
+phys_size_t initdram(int board_type)
+{
+ ddr_tap_tuning();
Is the DDR tap tuning needed on all AR7xxx/AR9xxx systems ?
Yes, it's for optimizing DDR timing according to hardware.
Sometimes, the hard code value is not ideal.
AR934x doesn't seem to need this.
I seem the following code in u-boot from Atheros LSDK:
#ifdef CONFIG_AP123
ath_ddr_tap_cal();
+ return get_ram_size((void *)KSEG1, SZ_256M);
+}
diff --git a/arch/mips/mach-ath79/include/mach/ar71xx_regs.h
b/arch/mips/mach-ath79/include/mach/ar71xx_regs.h
new file mode 100644
index 0000000..893dedc
--- /dev/null
+++ b/arch/mips/mach-ath79/include/mach/ar71xx_regs.h
@@ -0,0 +1,1184 @@
+/*
+ * Atheros AR71XX/AR724X/AR913X SoC register definitions
+ *
+ * Copyright (C) 2015-2016 Wills Wang <[email protected]>
+ * Copyright (C) 2010-2011 Jaiganesh Narayanan <[email protected]>
+ * Copyright (C) 2008-2010 Gabor Juhos <[email protected]>
+ * Copyright (C) 2008 Imre Kaloz <[email protected]>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#ifndef __ASM_MACH_AR71XX_REGS_H
+#define __ASM_MACH_AR71XX_REGS_H
+
+#ifndef __ASSEMBLY__
+#include <linux/bitops.h>
+#else
+#ifndef BIT
+#define BIT(nr) (1 << (nr))
This should really go into some common header.
This header is also included by some assembly code,
but the BIT macro in linux/bitops.h isn't compatiable with assembler.
Because of the 1UL in it ?
Yes, there are also a few other C keywords and syntax, such as in-line
function.
[...]
--
Best Regards
Wills
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