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[ARM] S3C24XX: Split pll code out of regs-clock.h

Browse source 
Move the PLL calculation code into it's own header
file for re-use with the other plat-s3c24xx based
systems such as the S3C24A0.

Note, we change the name of s3c2410_get_pll to the
more generically named s3c24xx_get_pll as well as
the related defintions.

Signed-off-by: Ben Dooks <ben-linux@fluff.org>
This commit is contained in:
Ben Dooks 2008-10-21 14:06:34 +01:00
parent 93bc6b6371
commit e24b864ab3
7 changed files with 49 additions and 41 deletions
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33
arch/arm/mach-s3c2410/include/mach/regs-clock.h
View file

@ -42,13 +42,6 @@
#define S3C2410_CLKCON_IIS (1<<17)
#define S3C2410_CLKCON_SPI (1<<18)
#define S3C2410_PLLCON_MDIVSHIFT 12
#define S3C2410_PLLCON_PDIVSHIFT 4
#define S3C2410_PLLCON_SDIVSHIFT 0
#define S3C2410_PLLCON_MDIVMASK ((1<<(1+(19-12)))-1)
#define S3C2410_PLLCON_PDIVMASK ((1<<5)-1)
#define S3C2410_PLLCON_SDIVMASK 3
/* DCLKCON register addresses in gpio.h */
#define S3C2410_DCLKCON_DCLK0EN (1<<0)
@ -76,32 +69,6 @@
#define S3C2410_CLKSLOW_SLOWVAL(x) (x)
#define S3C2410_CLKSLOW_GET_SLOWVAL(x) ((x) & 7)
#ifndef __ASSEMBLY__
#include <asm/div64.h>
static inline unsigned int
s3c2410_get_pll(unsigned int pllval, unsigned int baseclk)
{
unsigned int mdiv, pdiv, sdiv;
uint64_t fvco;
mdiv = pllval >> S3C2410_PLLCON_MDIVSHIFT;
pdiv = pllval >> S3C2410_PLLCON_PDIVSHIFT;
sdiv = pllval >> S3C2410_PLLCON_SDIVSHIFT;
mdiv &= S3C2410_PLLCON_MDIVMASK;
pdiv &= S3C2410_PLLCON_PDIVMASK;
sdiv &= S3C2410_PLLCON_SDIVMASK;
fvco = (uint64_t)baseclk * (mdiv + 8);
do_div(fvco, (pdiv + 2) << sdiv);
return (unsigned int)fvco;
}
#endif /* __ASSEMBLY__ */
#if defined(CONFIG_CPU_S3C2440) || defined(CONFIG_CPU_S3C2442)
/* extra registers */

8
arch/arm/mach-s3c2410/mach-h1940.c
View file

@ -43,6 +43,7 @@
#include <plat/clock.h>
#include <plat/devs.h>
#include <plat/cpu.h>
#include <plat/pll.h>
#include <plat/pm.h>
static struct map_desc h1940_iodesc[] __initdata = {
@ -223,10 +224,9 @@ static void __init h1940_init(void)
S3C2410_MISCCR_USBSUSPND0 |
S3C2410_MISCCR_USBSUSPND1, 0x0);
tmp = (
0x78 << S3C2410_PLLCON_MDIVSHIFT)
| (0x02 << S3C2410_PLLCON_PDIVSHIFT)
| (0x03 << S3C2410_PLLCON_SDIVSHIFT);
tmp = (0x78 << S3C24XX_PLLCON_MDIVSHIFT)
| (0x02 << S3C24XX_PLLCON_PDIVSHIFT)
| (0x03 << S3C24XX_PLLCON_SDIVSHIFT);
writel(tmp, S3C2410_UPLLCON);
platform_add_devices(h1940_devices, ARRAY_SIZE(h1940_devices));

3
arch/arm/mach-s3c2410/s3c2410.c
View file

@ -35,6 +35,7 @@
#include <plat/cpu.h>
#include <plat/devs.h>
#include <plat/clock.h>
#include <plat/pll.h>
/* Initial IO mappings */
@ -74,7 +75,7 @@ void __init s3c2410_init_clocks(int xtal)
/* now we've got our machine bits initialised, work out what
* clocks we've got */
fclk = s3c2410_get_pll(__raw_readl(S3C2410_MPLLCON), xtal);
fclk = s3c24xx_get_pll(__raw_readl(S3C2410_MPLLCON), xtal);
tmp = __raw_readl(S3C2410_CLKDIVN);

3
arch/arm/mach-s3c2412/s3c2412.c
View file

@ -47,6 +47,7 @@
#include <plat/devs.h>
#include <plat/clock.h>
#include <plat/pm.h>
#include <plat/pll.h>
#ifndef CONFIG_CPU_S3C2412_ONLY
void __iomem *s3c24xx_va_gpio2 = S3C24XX_VA_GPIO;
@ -165,7 +166,7 @@ void __init s3c2412_init_clocks(int xtal)
/* now we've got our machine bits initialised, work out what
* clocks we've got */
fclk = s3c2410_get_pll(__raw_readl(S3C2410_MPLLCON), xtal*2);
fclk = s3c24xx_get_pll(__raw_readl(S3C2410_MPLLCON), xtal*2);
clk_mpll.rate = fclk;

3
arch/arm/plat-s3c24xx/clock.c
View file

@ -49,6 +49,7 @@
#include <plat/clock.h>
#include <plat/cpu.h>
#include <plat/pll.h>
/* clock information */
@ -332,7 +333,7 @@ int __init s3c24xx_setup_clocks(unsigned long xtal,
/* initialise the main system clocks */
clk_xtal.rate = xtal;
clk_upll.rate = s3c2410_get_pll(__raw_readl(S3C2410_UPLLCON), xtal);
clk_upll.rate = s3c24xx_get_pll(__raw_readl(S3C2410_UPLLCON), xtal);
clk_mpll.rate = fclk;
clk_h.rate = hclk;

37
arch/arm/plat-s3c24xx/include/plat/pll.h Normal file
View file

@ -0,0 +1,37 @@
/* linux/arch/arm/plat-s3c24xx/include/plat/pll.h
*
* Copyright 2008 Simtec Electronics
* Ben Dooks <ben@simtec.co.uk>
* http://armlinux.simtec.co.uk/
*
* S3C24xx - common pll registers and code
*/
#define S3C24XX_PLLCON_MDIVSHIFT 12
#define S3C24XX_PLLCON_PDIVSHIFT 4
#define S3C24XX_PLLCON_SDIVSHIFT 0
#define S3C24XX_PLLCON_MDIVMASK ((1<<(1+(19-12)))-1)
#define S3C24XX_PLLCON_PDIVMASK ((1<<5)-1)
#define S3C24XX_PLLCON_SDIVMASK 3
#include <asm/div64.h>
static inline unsigned int
s3c24xx_get_pll(unsigned int pllval, unsigned int baseclk)
{
unsigned int mdiv, pdiv, sdiv;
uint64_t fvco;
mdiv = pllval >> S3C24XX_PLLCON_MDIVSHIFT;
pdiv = pllval >> S3C24XX_PLLCON_PDIVSHIFT;
sdiv = pllval >> S3C24XX_PLLCON_SDIVSHIFT;
mdiv &= S3C24XX_PLLCON_MDIVMASK;
pdiv &= S3C24XX_PLLCON_PDIVMASK;
sdiv &= S3C24XX_PLLCON_SDIVMASK;
fvco = (uint64_t)baseclk * (mdiv + 8);
do_div(fvco, (pdiv + 2) << sdiv);
return (unsigned int)fvco;
}

3
arch/arm/plat-s3c24xx/s3c244x.c
View file

@ -42,6 +42,7 @@
#include <plat/devs.h>
#include <plat/cpu.h>
#include <plat/pm.h>
#include <plat/pll.h>
static struct map_desc s3c244x_iodesc[] __initdata = {
IODESC_ENT(CLKPWR),
@ -80,7 +81,7 @@ void __init s3c244x_init_clocks(int xtal)
/* now we've got our machine bits initialised, work out what
* clocks we've got */
fclk = s3c2410_get_pll(__raw_readl(S3C2410_MPLLCON), xtal) * 2;
fclk = s3c24xx_get_pll(__raw_readl(S3C2410_MPLLCON), xtal) * 2;
clkdiv = __raw_readl(S3C2410_CLKDIVN);
camdiv = __raw_readl(S3C2440_CAMDIVN);