mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-29 15:43:59 +08:00
b1fb05cdb9
au1xmmc.c driver depends on it, so export it for modules. Signed-off-by: Manuel Lauss <mano@roarinelk.homelinux.net> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
94 lines
2.8 KiB
C
94 lines
2.8 KiB
C
/*
|
|
* BRIEF MODULE DESCRIPTION
|
|
* Simple Au1xx0 clocks routines.
|
|
*
|
|
* Copyright 2001, 2008 MontaVista Software Inc.
|
|
* Author: MontaVista Software, Inc. <source@mvista.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License as published by the
|
|
* Free Software Foundation; either version 2 of the License, or (at your
|
|
* option) any later version.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
|
|
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
|
|
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
|
|
* NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
|
|
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
|
|
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
|
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*
|
|
* You should have received a copy of the GNU General Public License along
|
|
* with this program; if not, write to the Free Software Foundation, Inc.,
|
|
* 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <asm/mach-au1x00/au1000.h>
|
|
|
|
static unsigned int au1x00_clock; /* Hz */
|
|
static unsigned int lcd_clock; /* KHz */
|
|
static unsigned long uart_baud_base;
|
|
|
|
/*
|
|
* Set the au1000_clock
|
|
*/
|
|
void set_au1x00_speed(unsigned int new_freq)
|
|
{
|
|
au1x00_clock = new_freq;
|
|
}
|
|
|
|
unsigned int get_au1x00_speed(void)
|
|
{
|
|
return au1x00_clock;
|
|
}
|
|
EXPORT_SYMBOL(get_au1x00_speed);
|
|
|
|
/*
|
|
* The UART baud base is not known at compile time ... if
|
|
* we want to be able to use the same code on different
|
|
* speed CPUs.
|
|
*/
|
|
unsigned long get_au1x00_uart_baud_base(void)
|
|
{
|
|
return uart_baud_base;
|
|
}
|
|
|
|
void set_au1x00_uart_baud_base(unsigned long new_baud_base)
|
|
{
|
|
uart_baud_base = new_baud_base;
|
|
}
|
|
|
|
/*
|
|
* Calculate the Au1x00's LCD clock based on the current
|
|
* cpu clock and the system bus clock, and try to keep it
|
|
* below 40 MHz (the Pb1000 board can lock-up if the LCD
|
|
* clock is over 40 MHz).
|
|
*/
|
|
void set_au1x00_lcd_clock(void)
|
|
{
|
|
unsigned int static_cfg0;
|
|
unsigned int sys_busclk = (get_au1x00_speed() / 1000) /
|
|
((int)(au_readl(SYS_POWERCTRL) & 0x03) + 2);
|
|
|
|
static_cfg0 = au_readl(MEM_STCFG0);
|
|
|
|
if (static_cfg0 & (1 << 11))
|
|
lcd_clock = sys_busclk / 5; /* note: BCLK switching fails with D5 */
|
|
else
|
|
lcd_clock = sys_busclk / 4;
|
|
|
|
if (lcd_clock > 50000) /* Epson MAX */
|
|
printk(KERN_WARNING "warning: LCD clock too high (%u KHz)\n",
|
|
lcd_clock);
|
|
}
|
|
|
|
unsigned int get_au1x00_lcd_clock(void)
|
|
{
|
|
return lcd_clock;
|
|
}
|
|
EXPORT_SYMBOL(get_au1x00_lcd_clock);
|