Hi,
I have recently developed a similar driver for that. Your IO memory
remapping should look like similar to this in your module_init:
-------
if ( (lcd_remap_address = (u32) ioremap(LCD_BASE, LCD_END - LCD_BASE
+1 )) == 0) {
printk(KERN_ERR "Couldn't ioremap memory at 0x%08lX\n",
(unsigned long) LCD_BASE);
return -EFAULT;
}
// Configure the IO as outputs
XIo_Out32(lcd_remap_address + 0x4,0x00);
-------
/A
Ludovic Desroches wrote:
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
------------------------------------------------------------------------
_______________________________________________
Linuxppc-embedded mailing list
[email protected]
https://ozlabs.org/mailman/listinfo/linuxppc-embedded
_______________________________________________
Linuxppc-embedded mailing list
[email protected]
https://ozlabs.org/mailman/listinfo/linuxppc-embedded
