[U-Boot] [PATCH 1/3] ARM: at91: clock: add PLLB enable/disable functions

[Yang, Wenyou]

Hi Heiko,

> -----Original Message-----
> From: Heiko Schocher [mailto:hs at denx.de]
> Sent: 2015年12月10日 17:34
> To: Yang, Wenyou <Wenyou.Yang at atmel.com>
> Cc: U-Boot Mailing List <u-boot at lists.denx.de>
> Subject: Re: [U-Boot] [PATCH 1/3] ARM: at91: clock: add PLLB enable/disable
> functions
> 
> Hello Wenyou,
> 
> Am 09.12.2015 um 05:29 schrieb Wenyou Yang:
> > To avoid the duplicated code, add the PLLB handle functions.
> >
> > Signed-off-by: Wenyou Yang <wenyou.yang at atmel.com>
> > ---
> >
> >   arch/arm/mach-at91/arm926ejs/clock.c  |   38
> +++++++++++++++++++++++++++++++++
> >   arch/arm/mach-at91/include/mach/clk.h |    2 ++
> >   2 files changed, 40 insertions(+)
> 
> Tested on the smartweb board, see log:
> http://xeidos.ddns.net/buildbot/builders/smartweb_dfu/builds/29/steps/shell/logs/tb
> otlog
> 
> Tested-by: Heiko Schocher <hs at denx.de>

Thank you very much for your effort for ALL series.

> 
> bye,
> Heiko
> >
> > diff --git a/arch/arm/mach-at91/arm926ejs/clock.c
> > b/arch/arm/mach-at91/arm926ejs/clock.c
> > index c8b5e10..c8d24ae 100644
> > --- a/arch/arm/mach-at91/arm926ejs/clock.c
> > +++ b/arch/arm/mach-at91/arm926ejs/clock.c
> > @@ -18,6 +18,8 @@
> >   # error You need to define CONFIG_AT91FAMILY in your board config!
> >   #endif
> >
> > +#define EN_PLLB_TIMEOUT	500
> > +
> >   DECLARE_GLOBAL_DATA_PTR;
> >
> >   static unsigned long at91_css_to_rate(unsigned long css) @@ -242,3
> > +244,39 @@ void at91_mck_init(u32 mckr)
> >   	while (!(readl(&pmc->sr) & AT91_PMC_MCKRDY))
> >   		;
> >   }
> > +
> > +int at91_pllb_clk_enable(u32 pllbr)
> > +{
> > +	struct at91_pmc *pmc = (at91_pmc_t *)ATMEL_BASE_PMC;
> > +	ulong start_time, tmp_time;
> > +
> > +	start_time = get_timer(0);
> > +	writel(pllbr, &pmc->pllbr);
> > +	while ((readl(&pmc->sr) & AT91_PMC_LOCKB) != AT91_PMC_LOCKB) {
> > +		tmp_time = get_timer(0);
> > +		if ((tmp_time - start_time) > EN_PLLB_TIMEOUT) {
> > +			printf("ERROR: failed to enable PLLB\n");
> > +			return -1;
> > +		}
> > +	}
> > +
> > +	return 0;
> > +}
> > +
> > +int at91_pllb_clk_disable(void)
> > +{
> > +	struct at91_pmc *pmc = (at91_pmc_t *)ATMEL_BASE_PMC;
> > +	ulong start_time, tmp_time;
> > +
> > +	start_time = get_timer(0);
> > +	writel(0, &pmc->pllbr);
> > +	while ((readl(&pmc->sr) & AT91_PMC_LOCKB) != 0) {
> > +		tmp_time = get_timer(0);
> > +		if ((tmp_time - start_time) > EN_PLLB_TIMEOUT) {
> > +			printf("ERROR: failed to disable PLLB\n");
> > +			return -1;
> > +		}
> > +	}
> > +
> > +	return 0;
> > +}
> > diff --git a/arch/arm/mach-at91/include/mach/clk.h
> > b/arch/arm/mach-at91/include/mach/clk.h
> > index b2604ef..64dec52 100644
> > --- a/arch/arm/mach-at91/include/mach/clk.h
> > +++ b/arch/arm/mach-at91/include/mach/clk.h
> > @@ -133,5 +133,7 @@ void at91_system_clk_disable(int sys_clk);
> >   int at91_upll_clk_enable(void);
> >   int at91_upll_clk_disable(void);
> >   void at91_usb_clk_init(u32 value);
> > +int at91_pllb_clk_enable(u32 pllbr);
> > +int at91_pllb_clk_disable(void);
> >
> >   #endif /* __ASM_ARM_ARCH_CLK_H__ */
> >
> 
> --
> DENX Software Engineering GmbH,      Managing Director: Wolfgang Denk
> HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany


Best Regards,
Wenyou Yang