From: Antony Pavlov <antonynpavlov@gmail.com>
To: barebox@lists.infradead.org
Subject: [PATCH v2 1/5] MIPS: rzx50: prepare for new debug_ll
Date: Mon, 3 Jun 2013 14:53:23 +0400 [thread overview]
Message-ID: <1370256807-26755-2-git-send-email-antonynpavlov@gmail.com> (raw)
In-Reply-To: <1370256807-26755-1-git-send-email-antonynpavlov@gmail.com>
Set DEBUG_LL_UART_DIVISOR to use <asm/debug_ll_ns16550.h>.
The JZ4755 uses 24 MHz as the main reference frequency (EXCLK).
The UART controller can work on full EXCLK or on EXCLK/2.
Just now we use EXCLK/2 legacy clock setup made by U-Boot.
So set UART controller base frequency to 12 MHz.
Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
---
arch/mips/mach-xburst/include/mach/debug_ll_jz4750d.h | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/arch/mips/mach-xburst/include/mach/debug_ll_jz4750d.h b/arch/mips/mach-xburst/include/mach/debug_ll_jz4750d.h
index 7bf66b1..2a55dea 100644
--- a/arch/mips/mach-xburst/include/mach/debug_ll_jz4750d.h
+++ b/arch/mips/mach-xburst/include/mach/debug_ll_jz4750d.h
@@ -34,4 +34,8 @@
#define DEBUG_LL_UART_SHIFT 2
+#define DEBUG_LL_UART_CLK (12000000 / 16)
+#define DEBUG_LL_UART_BPS CONFIG_BAUDRATE
+#define DEBUG_LL_UART_DIVISOR (DEBUG_LL_UART_CLK / DEBUG_LL_UART_BPS)
+
#endif /* __INCLUDE_DEBUG_LL_JZ4750D_H__ */
--
1.7.10.4
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next prev parent reply other threads:[~2013-06-03 11:20 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-06-03 10:53 [PATCH v2 0/5] MIPS: rework ns16550 debug_ll Antony Pavlov
2013-06-03 10:53 ` Antony Pavlov [this message]
2013-06-03 10:53 ` [PATCH v2 2/5] MIPS: malta: prepare for new debug_ll Antony Pavlov
2013-06-03 10:53 ` [PATCH v2 3/5] MIPS: unify ns16550 debug_ll support code Antony Pavlov
2013-06-03 10:53 ` [PATCH v2 4/5] MIPS: rzx50: pbl: use debug_ll Antony Pavlov
2013-06-03 10:53 ` [PATCH v2 5/5] MIPS: rzx50_defconfig: use UART1 for low-level debug Antony Pavlov
2013-06-04 7:03 ` [PATCH v2 0/5] MIPS: rework ns16550 debug_ll Sascha Hauer
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