From: plagnioj@jcrosoft.com (Jean-Christophe PLAGNIOL-VILLARD)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v2 02/19] ARM: at91/at91x40: remove use of at91_sys_read/write
Date: Thu, 23 Feb 2012 07:01:51 +0100 [thread overview]
Message-ID: <20120223060151.GD20176@game.jcrosoft.org> (raw)
In-Reply-To: <4F45B985.1000204@gmail.com>
On 14:59 Thu 23 Feb , Ryan Mallon wrote:
> On 23/02/12 14:25, Jean-Christophe PLAGNIOL-VILLARD wrote:
>
> > On 09:22 Thu 23 Feb , Ryan Mallon wrote:
> >> On 22/02/12 20:39, Nicolas Ferre wrote:
> >>
> >>> From: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
> >>>
> >>> Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
> >>> Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
> >>> ---
> >>> arch/arm/mach-at91/at91x40.c | 2 +-
> >>> arch/arm/mach-at91/at91x40_time.c | 28 +++++++++++++++++-----------
> >>> arch/arm/mach-at91/include/mach/at91x40.h | 18 +++++++++---------
> >>> 3 files changed, 27 insertions(+), 21 deletions(-)
> >>>
> >>> diff --git a/arch/arm/mach-at91/at91x40.c b/arch/arm/mach-at91/at91x40.c
> >>> index 0154b7f..5400a1d 100644
> >>> --- a/arch/arm/mach-at91/at91x40.c
> >>> +++ b/arch/arm/mach-at91/at91x40.c
> >>> @@ -44,7 +44,7 @@ static void at91x40_idle(void)
> >>> * Disable the processor clock. The processor will be automatically
> >>> * re-enabled by an interrupt or by a reset.
> >>> */
> >>> - at91_sys_write(AT91_PS_CR, AT91_PS_CR_CPU);
> >>> + __raw_writel(AT91_PS_CR_CPU, AT91_PS_CR);
> >>
> >>
> >> This doesn't seem to be equivalent, at91_sys_write does:
> >>
> >> void __iomem *addr = (void __iomem *)AT91_VA_BASE_SYS;
> >> __raw_writel(value, addr + reg_offset);
> >>
> >> and this patch doesn't redefine AT91_PS_CR. Was it broken before this
> >> patch? What am I missing?
> > this is right
> > #define AT91_PS_CR (AT91_PS + 0) /* PS Control register */
>
>
> That doesn't answer my question.
>
> The old, at91_sys_write, version was writing to (using __raw_writel):
>
> AT91_VA_BASE_SYS + AT91_PS_CR
>
> The new version is writing, also using __raw_writel, to:
>
> AT91_PS_CR
>
> The value of AT91_PS_CR is not changed in this patch. Assuming that
> AT91_VA_BASE_SYS for at91x40 (which at a quick glance it is not), then
> the old and the new version of the code are not writing to the same
> address.
>
> Was it previously incorrect, or is it incorrect now?
it's as we update
+#define AT91_PS 0xffff4000 /* Power Save */
Best Regards,
J.
next prev parent reply other threads:[~2012-02-23 6:01 UTC|newest]
Thread overview: 58+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-02-22 9:39 [PATCH v2 00/19] at91 first cleanup series for 3.4 Nicolas Ferre
2012-02-22 9:39 ` [PATCH v2 01/19] ARM: at91: factorise duplicated at91sam9 idle Nicolas Ferre
2012-02-22 9:39 ` [PATCH v2 02/19] ARM: at91/at91x40: remove use of at91_sys_read/write Nicolas Ferre
2012-02-22 14:36 ` Arnd Bergmann
2012-02-22 16:26 ` Jean-Christophe PLAGNIOL-VILLARD
2012-02-22 22:22 ` Ryan Mallon
2012-02-23 3:25 ` Jean-Christophe PLAGNIOL-VILLARD
2012-02-23 3:59 ` Ryan Mallon
2012-02-23 6:01 ` Jean-Christophe PLAGNIOL-VILLARD [this message]
2012-02-23 9:23 ` Ryan Mallon
2012-02-22 9:39 ` [PATCH v2 03/19] ARM: at91: make matrix register base soc independent Nicolas Ferre
2012-02-22 22:17 ` Ryan Mallon
2012-02-23 3:26 ` Jean-Christophe PLAGNIOL-VILLARD
2012-02-22 9:39 ` [PATCH v2 04/19] ARM: at91: make ST (System Timer) " Nicolas Ferre
2012-02-22 22:24 ` Ryan Mallon
2012-02-22 9:39 ` [PATCH v2 05/19] ARM: at91/ST: remove not needed casts Nicolas Ferre
2012-02-22 22:24 ` Ryan Mallon
2012-02-22 9:39 ` [PATCH v2 06/19] ARM: at91/pm_slowclock: rename register to named define Nicolas Ferre
2012-02-22 9:50 ` Russell King - ARM Linux
2012-02-22 17:34 ` Jean-Christophe PLAGNIOL-VILLARD
2012-02-22 9:39 ` [PATCH v2 07/19] ARM: at91/pm_slowclock: function slow_clock() accepts parameters Nicolas Ferre
2012-02-22 9:52 ` Russell King - ARM Linux
2012-02-22 12:58 ` Jean-Christophe PLAGNIOL-VILLARD
2012-02-22 13:18 ` Russell King - ARM Linux
2012-02-22 13:57 ` Jean-Christophe PLAGNIOL-VILLARD
2012-02-22 9:39 ` [PATCH v2 08/19] ARM: at91: move at91rm9200 sdramc defines to at91rm9200_sdramc.h Nicolas Ferre
2012-02-22 9:39 ` [PATCH v2 09/19] ARM: at91: make sdram/ddr register base soc independent Nicolas Ferre
2012-02-22 22:33 ` Ryan Mallon
2012-02-23 8:56 ` Nicolas Ferre
2012-02-23 9:58 ` Nicolas Ferre
2012-02-23 10:51 ` Ryan Mallon
2012-02-23 13:47 ` Nicolas Ferre
2012-02-22 9:39 ` [PATCH v2 10/19] ARM: at91/pm_slowclock: add runtime detection of memory contoller Nicolas Ferre
2012-02-22 9:39 ` [PATCH v2 11/19] ARM: at91/PMC: make register base soc independent Nicolas Ferre
2012-02-22 22:50 ` Ryan Mallon
2012-02-23 8:38 ` Nicolas Ferre
2012-02-23 9:22 ` Ryan Mallon
2012-02-22 9:39 ` [PATCH v2 12/19] ARM: at91/rtc-at91sam9: each SoC can select the RTT device to use Nicolas Ferre
2012-02-22 14:50 ` Arnd Bergmann
2012-02-22 16:24 ` Jean-Christophe PLAGNIOL-VILLARD
2012-02-22 16:47 ` Arnd Bergmann
2012-02-22 17:07 ` Jean-Christophe PLAGNIOL-VILLARD
2012-02-22 17:25 ` Arnd Bergmann
2012-02-22 18:02 ` Jean-Christophe PLAGNIOL-VILLARD
2012-02-22 9:39 ` [PATCH v2 13/19] ARM: at91:rtc/rtc-at91sam9: ioremap register bank Nicolas Ferre
2012-02-22 9:39 ` [PATCH v2 14/19] ARM: at91/rtc-at91sam9: pass the GPBR to use via resources Nicolas Ferre
2012-02-22 9:39 ` [PATCH v2 15/19] ARM: at91: finally drop at91_sys_read/write Nicolas Ferre
2012-02-22 9:39 ` [PATCH v2 16/19] ARM: at91: merge SRAM Memory banks thanks to mirroring Nicolas Ferre
2012-02-22 23:13 ` Ryan Mallon
2012-02-23 3:28 ` Jean-Christophe PLAGNIOL-VILLARD
2012-02-22 9:39 ` [PATCH v2 17/19] Atmel: move console default platform_device to serial driver Nicolas Ferre
2012-02-22 9:39 ` [PATCH v2 18/19] ARM: at91/board-dt: drop default console Nicolas Ferre
2012-02-22 9:39 ` [PATCH v2 19/19] ARM: at91/board-dt: move at91_initialize() to init_irq() Nicolas Ferre
2012-02-22 9:48 ` Russell King - ARM Linux
2012-02-22 13:03 ` Jean-Christophe PLAGNIOL-VILLARD
2012-02-22 16:15 ` [PATCH 0/2] ARM: at91: two additional patches to cleanup series Nicolas Ferre
2012-02-22 16:15 ` [PATCH 1/2] ARM: at91: add at91sam9g25ek.dts in Makefile.boot Nicolas Ferre
2012-02-22 16:15 ` [PATCH 2/2] ARM: at91: properly sort dtb files " Nicolas Ferre
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