From mboxrd@z Thu Jan 1 00:00:00 1970 From: =?UTF-8?Q?Andreas_Bie=c3=9fmann?= Date: Tue, 26 Jan 2016 16:35:51 +0100 Subject: [U-Boot] [PATCH 1/3] ARM: at91: clock: add PLLB enable/disable functions In-Reply-To: <1449635383-8180-2-git-send-email-wenyou.yang@atmel.com> References: <1449635383-8180-1-git-send-email-wenyou.yang@atmel.com> <1449635383-8180-2-git-send-email-wenyou.yang@atmel.com> Message-ID: <56A79257.7050009@gmail.com> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de On 09.12.2015 05:29, Wenyou Yang wrote: > To avoid the duplicated code, add the PLLB handle functions. > > Signed-off-by: Wenyou Yang Reviewed-by: Andreas Bie?mann > --- > > arch/arm/mach-at91/arm926ejs/clock.c | 38 +++++++++++++++++++++++++++++++++ > arch/arm/mach-at91/include/mach/clk.h | 2 ++ > 2 files changed, 40 insertions(+) > > 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__ */ >