From: Magnus Damm <magnus.damm@gmail.com>
To: linux-kernel@vger.kernel.org
Cc: linux-sh@vger.kernel.org, johnstul@us.ibm.com,
horms@verge.net.au, shinya.kuribayashi.px@renesas.com,
Magnus Damm <magnus.damm@gmail.com>,
tglx@linutronix.de
Subject: [PATCH 08/08] clocksource: sh_cmt: Add CMT register layout comment
Date: Fri, 14 Dec 2012 05:54:37 +0000 [thread overview]
Message-ID: <20121214055437.10081.97676.sendpatchset@w520> (raw)
In-Reply-To: <20121214055323.10081.12056.sendpatchset@w520>
From: Magnus Damm <damm@opensource.se>
Add a comment about different register layouts
supported by the CMT driver.
Signed-off-by: Magnus Damm <damm@opensource.se>
---
drivers/clocksource/sh_cmt.c | 15 +++++++++++++++
1 file changed, 15 insertions(+)
--- 0005/drivers/clocksource/sh_cmt.c
+++ work/drivers/clocksource/sh_cmt.c 2012-12-14 11:43:10.000000000 +0900
@@ -66,6 +66,21 @@ struct sh_cmt_priv {
unsigned long value);
};
+/* Examples of supported CMT timer register layouts and I/O access widths:
+ *
+ * "16-bit counter and 16-bit control" as found on sh7263:
+ * CMSTR 0xfffec000 16-bit
+ * CMCSR 0xfffec002 16-bit
+ * CMCNT 0xfffec004 16-bit
+ * CMCOR 0xfffec006 16-bit
+ *
+ * "32-bit counter and 16-bit control" as found on sh7372, sh73a0, r8a7740:
+ * CMSTR 0xffca0000 16-bit
+ * CMCSR 0xffca0060 16-bit
+ * CMCNT 0xffca0064 32-bit
+ * CMCOR 0xffca0068 32-bit
+ */
+
static unsigned long sh_cmt_read16(void __iomem *base, unsigned long offs)
{
return ioread16(base + (offs << 1));
next prev parent reply other threads:[~2012-12-14 5:54 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-12-14 5:53 [PATCH 00/08] clocksource: sh_cmt: CMT driver update Magnus Damm
2012-12-14 5:53 ` [PATCH 01/08] clocksource: sh_cmt: Take care of clk_put() when setup_irq() fails Magnus Damm
2012-12-14 5:53 ` [PATCH 02/08] clocksource: sh_cmt: Initialize 'max_match_value' and 'lock' in sh_cmt_setup() Magnus Damm
2012-12-14 5:53 ` [PATCH 03/08] clocksource: sh_cmt: Consolidate platform_set_drvdata() call Magnus Damm
2012-12-14 5:54 ` [PATCH 04/08] clocksource: sh_cmt: Introduce per-register functions Magnus Damm
2012-12-14 5:54 ` [PATCH 05/08] clocksource: sh_cmt: CMSTR and CMCSR register access update Magnus Damm
2012-12-14 5:54 ` [PATCH 06/08] clocksource: sh_cmt: CMCNT and CMCOR " Magnus Damm
2012-12-14 5:54 ` [PATCH 07/08] clocksource: sh_cmt: Add control register callbacks Magnus Damm
2012-12-14 5:54 ` Magnus Damm [this message]
2012-12-19 17:57 ` [PATCH 00/08] clocksource: sh_cmt: CMT driver update John Stultz
2013-02-13 9:45 ` Guennadi Liakhovetski
2013-02-13 10:54 ` Simon Horman
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