From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
To: Pratyush Anand <pratyush.anand@st.com>
Cc: viresh.kumar@st.com, vipulkumar.samar@st.com,
bhupesh.sharma@st.com, tmarri@apm.com, linux-usb@vger.kernel.org,
vipin.kumar@st.com, shiraz.hashim@st.com, Amit.VIRDI@st.com,
rajeev-dlh.kumar@st.com, mmiesfeld@apm.com, deepak.sikri@st.com,
linuxppc-dev@lists.ozlabs.org, fchen@apm.com
Subject: Re: [PATCH 14/14] arm/include/asm/io.h : added macros to read/write big/little endian register
Date: Wed, 31 Aug 2011 09:35:00 +0200 [thread overview]
Message-ID: <20110831073500.GB9353@linutronix.de> (raw)
In-Reply-To: <335243c9467c0127206234819a94c9f72358fdf2.1314704558.git.pratyush.anand@st.com>
* Pratyush Anand | 2011-08-30 17:28:01 [+0530]:
>diff --git a/arch/arm/include/asm/io.h b/arch/arm/include/asm/io.h
>index 815efa2..32282b4 100644
>--- a/arch/arm/include/asm/io.h
>+++ b/arch/arm/include/asm/io.h
>@@ -297,6 +297,14 @@ extern int valid_mmap_phys_addr_range(unsigned long pfn, size_t size);
> extern int devmem_is_allowed(unsigned long pfn);
> #endif
>
>+/* Big Endian */
>+#define out_be32(a, v) writel(__cpu_to_be32(v), a)
>+#define in_be32(a) __be32_to_cpu(readl(a))
>+
>+/* Little endian */
>+#define out_le32(a, v) writel(__cpu_to_le32(v), a)
>+#define in_le32(a) __le32_to_cpu(readl(a))
In LE-mode __le32_to_cpu() is NOP and you get a LE value.
In BE-mode readl() will swap a and le32_to_cpu will swap a again. So you
get a BE value. Is this what you want?
>+
Please split this patch out and get it accepterd by ARM community. USB
people won't merge this.
Sebastian
next prev parent reply other threads:[~2011-08-31 7:35 UTC|newest]
Thread overview: 51+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-08-30 11:57 [PATCH 00/14] Modifications for DWC OTG since v13 Pratyush Anand
2011-08-30 11:57 ` [PATCH 01/14] dwc/otg: Add Register definitions Pratyush Anand
2011-08-31 22:35 ` Greg KH
2011-09-02 11:31 ` Pratyush Anand
2011-08-30 11:57 ` [PATCH 02/14] dwc/otg: Structure declaration for shared data Pratyush Anand
2011-08-30 15:29 ` Tirumala Marri
2011-08-30 15:43 ` Pratyush Anand
2011-08-31 17:17 ` Tirumala Marri
2011-09-02 11:42 ` Pratyush Anand
2011-09-02 12:30 ` Alexander Gordeev
2011-09-02 16:40 ` Tirumala Marri
2011-09-02 16:37 ` Tirumala Marri
2011-08-31 22:36 ` Greg KH
2011-09-01 0:18 ` Josh Boyer
2011-09-01 1:37 ` Greg KH
2011-08-31 22:36 ` Greg KH
2011-09-02 11:49 ` Pratyush Anand
2011-09-02 13:57 ` Greg KH
2011-08-30 11:57 ` [PATCH 03/14] dwc/otg: Add driver framework Pratyush Anand
2011-08-31 7:19 ` Sebastian Andrzej Siewior
2011-09-02 11:17 ` Pratyush Anand
2011-09-02 11:32 ` Sebastian Andrzej Siewior
2011-09-02 11:55 ` Pratyush Anand
2011-08-30 11:57 ` [PATCH 04/14] dwc/otg: Add Core Interface Layer (CIL) Pratyush Anand
2011-08-30 11:57 ` [PATCH 05/14] dwc/otg: Add HCD function Pratyush Anand
2011-08-30 11:57 ` [PATCH 06/14] dwc/otg: Add HCD interrupt function Pratyush Anand
2011-08-30 11:57 ` [PATCH 07/14] dwc/otg: Add HCD queue function Pratyush Anand
2011-08-30 11:57 ` [PATCH 08/14] dwc/otg: Add PCD function Pratyush Anand
2011-08-31 7:44 ` Sebastian Andrzej Siewior
2011-09-02 11:26 ` Pratyush Anand
2011-08-30 11:57 ` [PATCH 09/14] dwc/otg: Add PCD interrupt function Pratyush Anand
2011-08-30 11:57 ` [PATCH 10/14] dwc/otg: Add driver kernel configuration and Makefile Pratyush Anand
2011-08-30 11:57 ` [PATCH 11/14] dwc/otg: Driver enable gadget support Pratyush Anand
2011-08-30 13:01 ` Sergei Shtylyov
2011-08-30 15:40 ` Pratyush Anand
2011-08-30 11:57 ` [PATCH 12/14] include/linux/usb/gadget.h : include <linux/device.h> for successful compilation Pratyush Anand
2011-08-30 12:57 ` Sergei Shtylyov
2011-08-30 11:58 ` [PATCH 13/14] usb/gadget/kconfig: added dwc otg as an option for peripheral controller Pratyush Anand
2011-08-30 11:58 ` [PATCH 14/14] arm/include/asm/io.h : added macros to read/write big/little endian register Pratyush Anand
2011-08-31 7:35 ` Sebastian Andrzej Siewior [this message]
2011-09-02 10:43 ` Pratyush Anand
2011-09-02 11:02 ` Benjamin Herrenschmidt
2011-09-02 11:01 ` Benjamin Herrenschmidt
2011-09-05 14:28 ` Sebastian Andrzej Siewior
2011-09-05 17:16 ` Benjamin Herrenschmidt
2011-08-30 15:27 ` [PATCH 00/14] Modifications for DWC OTG since v13 Tirumala Marri
2011-08-30 15:46 ` Pratyush Anand
2011-08-31 1:18 ` Kyungmin Park
2011-08-31 6:49 ` Alexander Gordeev
2011-08-31 7:03 ` Pratyush Anand
2011-08-31 20:33 ` Felipe Balbi
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