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From: "Ludovic Desroches" <ludovic.desroches@gmail.com>
To: linuxppc-embedded@ozlabs.org
Subject: How accessing to my IP registers from Linux
Date: Tue, 3 Jun 2008 09:23:07 +0200	[thread overview]
Message-ID: <388e90610806030023x4a2c1077hfbabb49b95853bd0@mail.gmail.com> (raw)

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Hi,



I have put xilinx kernel on my board : a memec FX12 based on a Virtex 4 FX.
Everything thing is OK, I have my serial console, Ethernet is also OK.

I have to make some drivers. For example one for the LCD screen. It is my
first driver so I want to try with something easier like LEDs. I know there
is a driver from Xilinx but I want to do it by myself. Moreover it is only a
file to adapt Xilinx standelone driver for Kernel.



I try to read and to write the registers of my GPIO IP which is working, I
have made some tests in standelone. How accessing to these registers ?

I have tried with this for example but without success :

ptr = ioremap_nocache(0x70001e00,0x00000004);
printk("GPIO_DATA (readl): %u\n",readl(ptr));



readl, outl, ioread32 : same result.



Thanks



Best Regards

-- 
Ludovic Desroches
Ingénieur ESIEE 2008
mobile : 06 19 21 02 08
http://www.odulo.net

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             reply	other threads:[~2008-06-03  7:23 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-06-03  7:23 Ludovic Desroches [this message]
2008-06-03  9:14 ` How accessing to my IP registers from Linux A. Nolson
2008-06-03 10:05   ` Ludovic Desroches

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