From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mail-lb0-f177.google.com ([209.85.217.177]) by merlin.infradead.org with esmtps (Exim 4.76 #1 (Red Hat Linux)) id 1SVJjR-00084W-Vb for barebox@lists.infradead.org; Fri, 18 May 2012 09:44:24 +0000 Received: by mail-lb0-f177.google.com with SMTP id gg6so2448980lbb.36 for ; Fri, 18 May 2012 02:44:21 -0700 (PDT) From: Alexey Galakhov Date: Fri, 18 May 2012 15:43:29 +0600 Message-Id: <1337334211-12576-6-git-send-email-agalakhov@gmail.com> In-Reply-To: <1337334211-12576-1-git-send-email-agalakhov@gmail.com> References: <20120517175244.GH30400@pengutronix.de> <1337334211-12576-1-git-send-email-agalakhov@gmail.com> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: barebox-bounces@lists.infradead.org Errors-To: barebox-bounces+u.kleine-koenig=pengutronix.de@lists.infradead.org Subject: [PATCHv4 5/7] S5P lowlevel clock init To: barebox@lists.infradead.org Cc: Alexey Galakhov Signed-off-by: Alexey Galakhov --- arch/arm/mach-samsung/Makefile | 1 + arch/arm/mach-samsung/include/mach/s3c-generic.h | 4 ++ arch/arm/mach-samsung/lowlevel-s5pcxx.c | 61 ++++++++++++++++++++++ 3 files changed, 66 insertions(+) create mode 100644 arch/arm/mach-samsung/lowlevel-s5pcxx.c diff --git a/arch/arm/mach-samsung/Makefile b/arch/arm/mach-samsung/Makefile index 0b95e14..d7344c8 100644 --- a/arch/arm/mach-samsung/Makefile +++ b/arch/arm/mach-samsung/Makefile @@ -1,5 +1,6 @@ obj-y += s3c-timer.o generic.o obj-lowlevel-$(CONFIG_ARCH_S3C24xx) += lowlevel-s3c24x0.o +obj-lowlevel-$(CONFIG_ARCH_S5PCxx) += lowlevel-s5pcxx.o obj-$(CONFIG_ARCH_S3C24xx) += gpio-s3c24x0.o s3c24xx-clocks.o mem-s3c24x0.o obj-$(CONFIG_ARCH_S5PCxx) += gpio-s5pcxx.o clocks-s5pcxx.o obj-$(CONFIG_S3C_LOWLEVEL_INIT) += $(obj-lowlevel-y) diff --git a/arch/arm/mach-samsung/include/mach/s3c-generic.h b/arch/arm/mach-samsung/include/mach/s3c-generic.h index 9d40ef8..11b083d 100644 --- a/arch/arm/mach-samsung/include/mach/s3c-generic.h +++ b/arch/arm/mach-samsung/include/mach/s3c-generic.h @@ -37,3 +37,7 @@ unsigned s3c_get_uart_clk(unsigned src); uint32_t s3c24xx_get_memory_size(void); void s3c24xx_disable_second_sdram_bank(void); #endif + +#ifdef CONFIG_ARCH_S5PCxx +void s5p_init_pll(void); +#endif diff --git a/arch/arm/mach-samsung/lowlevel-s5pcxx.c b/arch/arm/mach-samsung/lowlevel-s5pcxx.c new file mode 100644 index 0000000..15afa47 --- /dev/null +++ b/arch/arm/mach-samsung/lowlevel-s5pcxx.c @@ -0,0 +1,61 @@ +/* + * Copyright (C) 2012 Alexey Galakhov + * + * Based on code from u-boot found somewhere on the web + * that seems to originate from Samsung + * + * 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. + */ + +#include +#include +#include +#include +#include +#include +#include + +#ifdef CONFIG_S3C_PLL_INIT +void __bare_init s5p_init_pll(void) +{ + uint32_t reg; + int i; + + /* Set Mux to FIN */ + writel(0, S5P_CLK_SRC0); + + writel(BOARD_APLL_LOCKTIME, S5P_xPLL_LOCK + S5P_APLL); + + /* Disable PLL */ + writel(0, S5P_xPLL_CON + S5P_APLL); + writel(0, S5P_xPLL_CON + S5P_MPLL); + + /* Set up dividers */ + reg = readl(S5P_CLK_DIV0); + reg &= ~(BOARD_CLK_DIV0_MASK); + reg |= (BOARD_CLK_DIV0_VAL); + writel(reg, S5P_CLK_DIV0); + + /* Set up PLLs */ + writel(BOARD_APLL_VAL, S5P_xPLL_CON + S5P_APLL); + writel(BOARD_MPLL_VAL, S5P_xPLL_CON + S5P_MPLL); + writel(BOARD_EPLL_VAL, S5P_xPLL_CON + S5P_EPLL); + writel(BOARD_VPLL_VAL, S5P_xPLL_CON + S5P_VPLL); + + /* Wait for sync */ + for (i = 0; i < 0x10000; ++i) + barrier(); + + reg = readl(S5P_CLK_SRC0); + reg |= 0x1111; /* switch MUX to PLL outputs */ + writel(reg, S5P_CLK_SRC0); +} +#endif /* CONFIG_S3C_PLL_INIT */ -- 1.7.10 _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox