summaryrefslogtreecommitdiff
path: root/arch/mips/alchemy/common/clocks.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/mips/alchemy/common/clocks.c')
-rw-r--r--arch/mips/alchemy/common/clocks.c105
1 files changed, 0 insertions, 105 deletions
diff --git a/arch/mips/alchemy/common/clocks.c b/arch/mips/alchemy/common/clocks.c
deleted file mode 100644
index f38298a8b98c..000000000000
--- a/arch/mips/alchemy/common/clocks.c
+++ /dev/null
@@ -1,105 +0,0 @@
-/*
- * 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 <linux/spinlock.h>
-#include <asm/time.h>
-#include <asm/mach-au1x00/au1000.h>
-
-/*
- * I haven't found anyone that doesn't use a 12 MHz source clock,
- * but just in case.....
- */
-#define AU1000_SRC_CLK 12000000
-
-static unsigned int au1x00_clock; /* Hz */
-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;
-}
-
-/*
- * We read the real processor speed from the PLL. This is important
- * because it is more accurate than computing it from the 32 KHz
- * counter, if it exists. If we don't have an accurate processor
- * speed, all of the peripherals that derive their clocks based on
- * this advertised speed will introduce error and sometimes not work
- * properly. This function is further convoluted to still allow configurations
- * to do that in case they have really, really old silicon with a
- * write-only PLL register. -- Dan
- */
-unsigned long au1xxx_calc_clock(void)
-{
- unsigned long cpu_speed;
-
- /*
- * On early Au1000, sys_cpupll was write-only. Since these
- * silicon versions of Au1000 are not sold by AMD, we don't bend
- * over backwards trying to determine the frequency.
- */
- if (au1xxx_cpu_has_pll_wo())
- cpu_speed = 396000000;
- else
- cpu_speed = (au_readl(SYS_CPUPLL) & 0x0000003f) * AU1000_SRC_CLK;
-
- /* On Alchemy CPU:counter ratio is 1:1 */
- mips_hpt_frequency = cpu_speed;
- /* Equation: Baudrate = CPU / (SD * 2 * CLKDIV * 16) */
- set_au1x00_uart_baud_base(cpu_speed / (2 * ((int)(au_readl(SYS_POWERCTRL)
- & 0x03) + 2) * 16));
-
- set_au1x00_speed(cpu_speed);
-
- return cpu_speed;
-}