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ARM: S3C2410: CPUFREQ: Add PLL table

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Add PLL table for the S3C2410 SoC.

Signed-off-by: Ben Dooks <ben@simtec.co.uk>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
This commit is contained in:
Ben Dooks 2009-07-30 23:23:28 +01:00 committed by Ben Dooks
parent a24c091db9
commit 438a09e1eb
3 changed files with 103 additions and 0 deletions
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7
arch/arm/mach-s3c2410/Kconfig
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@ -55,6 +55,13 @@ config S3C2410_CPUFREQ
help
CPU Frequency scaling support for S3C2410
config S3C2410_PLLTABLE
bool
depends on S3C2410_CPUFREQ && CPU_FREQ_S3C24XX_PLL
default y
help
Select the PLL table for the S3C2410
menu "S3C2410 Machines"
config ARCH_SMDK2410

1
arch/arm/mach-s3c2410/Makefile
View file

@ -16,6 +16,7 @@ obj-$(CONFIG_CPU_S3C2410_DMA) += dma.o
obj-$(CONFIG_S3C2410_PM) += pm.o sleep.o
obj-$(CONFIG_S3C2410_GPIO) += gpio.o
obj-$(CONFIG_S3C2410_CPUFREQ) += cpu-freq.o
obj-$(CONFIG_S3C2410_PLLTABLE) += pll.o
# Machine support

95
arch/arm/mach-s3c2410/pll.c Normal file
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@ -0,0 +1,95 @@
/* arch/arm/mach-s3c2410/pll.c
*
* Copyright (c) 2006,2007 Simtec Electronics
* http://armlinux.simtec.co.uk/
* Ben Dooks <ben@simtec.co.uk>
* Vincent Sanders <vince@arm.linux.org.uk>
*
* S3C2410 CPU PLL tables
*
* 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 program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/sysdev.h>
#include <linux/list.h>
#include <linux/clk.h>
#include <linux/err.h>
#include <plat/cpu.h>
#include <plat/cpu-freq-core.h>
static struct cpufreq_frequency_table pll_vals_12MHz[] = {
{ .frequency = 34000000, .index = PLLVAL(82, 2, 3), },
{ .frequency = 45000000, .index = PLLVAL(82, 1, 3), },
{ .frequency = 51000000, .index = PLLVAL(161, 3, 3), },
{ .frequency = 48000000, .index = PLLVAL(120, 2, 3), },
{ .frequency = 56000000, .index = PLLVAL(142, 2, 3), },
{ .frequency = 68000000, .index = PLLVAL(82, 2, 2), },
{ .frequency = 79000000, .index = PLLVAL(71, 1, 2), },
{ .frequency = 85000000, .index = PLLVAL(105, 2, 2), },
{ .frequency = 90000000, .index = PLLVAL(112, 2, 2), },
{ .frequency = 101000000, .index = PLLVAL(127, 2, 2), },
{ .frequency = 113000000, .index = PLLVAL(105, 1, 2), },
{ .frequency = 118000000, .index = PLLVAL(150, 2, 2), },
{ .frequency = 124000000, .index = PLLVAL(116, 1, 2), },
{ .frequency = 135000000, .index = PLLVAL(82, 2, 1), },
{ .frequency = 147000000, .index = PLLVAL(90, 2, 1), },
{ .frequency = 152000000, .index = PLLVAL(68, 1, 1), },
{ .frequency = 158000000, .index = PLLVAL(71, 1, 1), },
{ .frequency = 170000000, .index = PLLVAL(77, 1, 1), },
{ .frequency = 180000000, .index = PLLVAL(82, 1, 1), },
{ .frequency = 186000000, .index = PLLVAL(85, 1, 1), },
{ .frequency = 192000000, .index = PLLVAL(88, 1, 1), },
{ .frequency = 203000000, .index = PLLVAL(161, 3, 1), },
/* 2410A extras */
{ .frequency = 210000000, .index = PLLVAL(132, 2, 1), },
{ .frequency = 226000000, .index = PLLVAL(105, 1, 1), },
{ .frequency = 266000000, .index = PLLVAL(125, 1, 1), },
{ .frequency = 268000000, .index = PLLVAL(126, 1, 1), },
{ .frequency = 270000000, .index = PLLVAL(127, 1, 1), },
};
static int s3c2410_plls_add(struct sys_device *dev)
{
return s3c_plltab_register(pll_vals_12MHz, ARRAY_SIZE(pll_vals_12MHz));
}
static struct sysdev_driver s3c2410_plls_drv = {
.add = s3c2410_plls_add,
};
static int __init s3c2410_pll_init(void)
{
return sysdev_driver_register(&s3c2410_sysclass, &s3c2410_plls_drv);
}
arch_initcall(s3c2410_pll_init);
static struct sysdev_driver s3c2410a_plls_drv = {
.add = s3c2410_plls_add,
};
static int __init s3c2410a_pll_init(void)
{
return sysdev_driver_register(&s3c2410a_sysclass, &s3c2410a_plls_drv);
}
arch_initcall(s3c2410a_pll_init);