| Message ID | 1597277.ZvWPFlKtBI@flatron (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
Tomasz Figa wrote: > > From 1518d67b93432272312a55c4602040c580f46a0c Mon Sep 17 00:00:00 2001 > From: Tomasz Figa <tomasz.figa@gmail.com> > Date: Fri, 19 Aug 2011 11:54:31 +0200 > Subject: [PATCH 4/4 v3] ARM: s3c64xx: Add support for synchronous clock > operation. > > Some boards based on S3C6410 use synchronous clocking, which means that > HCLKx2 > and other system clocks are generated from APLL instead of MPLL. > > This patch adds support for such boards, by calculating hclk2 depending on > the status of S3C_OTHERS_SYNCMUXSEL bit in S3C64XX_OTHERS regist > > Signed-off-by: Tomasz Figa <tomasz.figa@gmail.com> > --- > arch/arm/mach-s3c64xx/clock.c | 8 +++++++- > arch/arm/mach-s3c64xx/include/mach/regs-sys.h | 1 + > 2 files changed, 8 insertions(+), 1 deletions(-) > > diff --git a/arch/arm/mach-s3c64xx/clock.c b/arch/arm/mach-s3c64xx/clock.c > index fdfc4d5..a7dab43 100644 > --- a/arch/arm/mach-s3c64xx/clock.c > +++ b/arch/arm/mach-s3c64xx/clock.c > @@ -780,7 +780,13 @@ void __init_or_cpufreq s3c6400_setup_clocks(void) > printk(KERN_INFO "S3C64XX: PLL settings, A=%ld, M=%ld, E=%ld\n", > apll, mpll, epll); > > - hclk2 = mpll / GET_DIV(clkdiv0, S3C6400_CLKDIV0_HCLK2); > + if(__raw_readl(S3C64XX_OTHERS) & S3C64XX_OTHERS_SYNCMUXSEL) > + /* Synchronous mode */ > + hclk2 = apll / GET_DIV(clkdiv0, S3C6400_CLKDIV0_HCLK2); > + else > + /* Asynchronous mode */ > + hclk2 = mpll / GET_DIV(clkdiv0, S3C6400_CLKDIV0_HCLK2); > + > hclk = hclk2 / GET_DIV(clkdiv0, S3C6400_CLKDIV0_HCLK); > pclk = hclk2 / GET_DIV(clkdiv0, S3C6400_CLKDIV0_PCLK); > > diff --git a/arch/arm/mach-s3c64xx/include/mach/regs-sys.h b/arch/arm/mach- > s3c64xx/include/mach/regs-sys.h > index 774e0de..b91e020 100644 > --- a/arch/arm/mach-s3c64xx/include/mach/regs-sys.h > +++ b/arch/arm/mach-s3c64xx/include/mach/regs-sys.h > @@ -26,5 +26,6 @@ > #define S3C64XX_OTHERS S3C_SYSREG(0x900) > > #define S3C64XX_OTHERS_USBMASK (1 << 16) > +#define S3C64XX_OTHERS_SYNCMUXSEL (1 << 6) > > #endif /* _PLAT_REGS_SYS_H */ > -- > 1.7.6 OK, applied. Thanks. Best regards, Kgene. -- Kukjin Kim <kgene.kim@samsung.com>, Senior Engineer, SW Solution Development Team, Samsung Electronics Co., Ltd.
diff --git a/arch/arm/mach-s3c64xx/clock.c b/arch/arm/mach-s3c64xx/clock.c index fdfc4d5..a7dab43 100644 --- a/arch/arm/mach-s3c64xx/clock.c +++ b/arch/arm/mach-s3c64xx/clock.c @@ -780,7 +780,13 @@ void __init_or_cpufreq s3c6400_setup_clocks(void) printk(KERN_INFO "S3C64XX: PLL settings, A=%ld, M=%ld, E=%ld\n", apll, mpll, epll); - hclk2 = mpll / GET_DIV(clkdiv0, S3C6400_CLKDIV0_HCLK2); + if(__raw_readl(S3C64XX_OTHERS) & S3C64XX_OTHERS_SYNCMUXSEL) + /* Synchronous mode */ + hclk2 = apll / GET_DIV(clkdiv0, S3C6400_CLKDIV0_HCLK2); + else + /* Asynchronous mode */ + hclk2 = mpll / GET_DIV(clkdiv0, S3C6400_CLKDIV0_HCLK2); + hclk = hclk2 / GET_DIV(clkdiv0, S3C6400_CLKDIV0_HCLK); pclk = hclk2 / GET_DIV(clkdiv0, S3C6400_CLKDIV0_PCLK); diff --git a/arch/arm/mach-s3c64xx/include/mach/regs-sys.h b/arch/arm/mach-s3c64xx/include/mach/regs-sys.h index 774e0de..b91e020 100644 --- a/arch/arm/mach-s3c64xx/include/mach/regs-sys.h +++ b/arch/arm/mach-s3c64xx/include/mach/regs-sys.h @@ -26,5 +26,6 @@ #define S3C64XX_OTHERS S3C_SYSREG(0x900) #define S3C64XX_OTHERS_USBMASK (1 << 16) +#define S3C64XX_OTHERS_SYNCMUXSEL (1 << 6) #endif /* _PLAT_REGS_SYS_H */