From 916ee9249a7f19d8eb18cc9ee16ca495a517ab34 Mon Sep 17 00:00:00 2001 From: Ben Dooks Date: Tue, 26 Jan 2010 16:31:32 +0900 Subject: ARM: S3C244X: Move S3C2442 code into S3C2440 Move the remaining S3C2442 code into mach-s3c2440 as there is only one file currently in there and these two SoCs are very similar. Signed-off-by: Ben Dooks --- arch/arm/mach-s3c2440/Kconfig | 12 +++ arch/arm/mach-s3c2440/Makefile | 2 + arch/arm/mach-s3c2440/s3c2442.c | 165 ++++++++++++++++++++++++++++++++++++++++ 3 files changed, 179 insertions(+) create mode 100644 arch/arm/mach-s3c2440/s3c2442.c (limited to 'arch/arm/mach-s3c2440') diff --git a/arch/arm/mach-s3c2440/Kconfig b/arch/arm/mach-s3c2440/Kconfig index 45cab7af5cde..f496385e1c75 100644 --- a/arch/arm/mach-s3c2440/Kconfig +++ b/arch/arm/mach-s3c2440/Kconfig @@ -15,6 +15,18 @@ config CPU_S3C2440 help Support for S3C2440 Samsung Mobile CPU based systems. +config CPU_S3C2442 + bool + depends on ARCH_S3C2410 + select CPU_ARM920T + select S3C2410_CLOCK + select S3C2410_GPIO + select S3C2410_PM if PM + select CPU_S3C244X + select CPU_LLSERIAL_S3C2440 + help + Support for S3C2442 Samsung Mobile CPU based systems. + config S3C2440_DMA bool depends on ARCH_S3C2410 && CPU_S3C24405B diff --git a/arch/arm/mach-s3c2440/Makefile b/arch/arm/mach-s3c2440/Makefile index e51497ca12ea..e8412b35dcb0 100644 --- a/arch/arm/mach-s3c2440/Makefile +++ b/arch/arm/mach-s3c2440/Makefile @@ -10,6 +10,8 @@ obj-n := obj- := obj-$(CONFIG_CPU_S3C2440) += s3c2440.o dsc.o +obj-$(CONFIG_CPU_S3C2442) += s3c2442.o + obj-$(CONFIG_CPU_S3C2440) += irq.o obj-$(CONFIG_CPU_S3C2440) += clock.o obj-$(CONFIG_S3C2440_DMA) += dma.o diff --git a/arch/arm/mach-s3c2440/s3c2442.c b/arch/arm/mach-s3c2440/s3c2442.c new file mode 100644 index 000000000000..188ad1e57dc0 --- /dev/null +++ b/arch/arm/mach-s3c2440/s3c2442.c @@ -0,0 +1,165 @@ +/* linux/arch/arm/mach-s3c2442/s3c2442.c + * + * Copyright (c) 2004-2005 Simtec Electronics + * http://armlinux.simtec.co.uk/ + * Ben Dooks + * + * S3C2442 core and lock support + * + * 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. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA +*/ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include + +#include + +#include +#include + +/* S3C2442 extended clock support */ + +static unsigned long s3c2442_camif_upll_round(struct clk *clk, + unsigned long rate) +{ + unsigned long parent_rate = clk_get_rate(clk->parent); + int div; + + if (rate > parent_rate) + return parent_rate; + + div = parent_rate / rate; + + if (div == 3) + return parent_rate / 3; + + /* note, we remove the +/- 1 calculations for the divisor */ + + div /= 2; + + if (div < 1) + div = 1; + else if (div > 16) + div = 16; + + return parent_rate / (div * 2); +} + +static int s3c2442_camif_upll_setrate(struct clk *clk, unsigned long rate) +{ + unsigned long parent_rate = clk_get_rate(clk->parent); + unsigned long camdivn = __raw_readl(S3C2440_CAMDIVN); + + rate = s3c2442_camif_upll_round(clk, rate); + + camdivn &= ~S3C2442_CAMDIVN_CAMCLK_DIV3; + + if (rate == parent_rate) { + camdivn &= ~S3C2440_CAMDIVN_CAMCLK_SEL; + } else if ((parent_rate / rate) == 3) { + camdivn |= S3C2440_CAMDIVN_CAMCLK_SEL; + camdivn |= S3C2442_CAMDIVN_CAMCLK_DIV3; + } else { + camdivn &= ~S3C2440_CAMDIVN_CAMCLK_MASK; + camdivn |= S3C2440_CAMDIVN_CAMCLK_SEL; + camdivn |= (((parent_rate / rate) / 2) - 1); + } + + __raw_writel(camdivn, S3C2440_CAMDIVN); + + return 0; +} + +/* Extra S3C2442 clocks */ + +static struct clk s3c2442_clk_cam = { + .name = "camif", + .id = -1, + .enable = s3c2410_clkcon_enable, + .ctrlbit = S3C2440_CLKCON_CAMERA, +}; + +static struct clk s3c2442_clk_cam_upll = { + .name = "camif-upll", + .id = -1, + .ops = &(struct clk_ops) { + .set_rate = s3c2442_camif_upll_setrate, + .round_rate = s3c2442_camif_upll_round, + }, +}; + +static int s3c2442_clk_add(struct sys_device *sysdev) +{ + struct clk *clock_upll; + struct clk *clock_h; + struct clk *clock_p; + + clock_p = clk_get(NULL, "pclk"); + clock_h = clk_get(NULL, "hclk"); + clock_upll = clk_get(NULL, "upll"); + + if (IS_ERR(clock_p) || IS_ERR(clock_h) || IS_ERR(clock_upll)) { + printk(KERN_ERR "S3C2442: Failed to get parent clocks\n"); + return -EINVAL; + } + + s3c2442_clk_cam.parent = clock_h; + s3c2442_clk_cam_upll.parent = clock_upll; + + s3c24xx_register_clock(&s3c2442_clk_cam); + s3c24xx_register_clock(&s3c2442_clk_cam_upll); + + clk_disable(&s3c2442_clk_cam); + + return 0; +} + +static struct sysdev_driver s3c2442_clk_driver = { + .add = s3c2442_clk_add, +}; + +static __init int s3c2442_clk_init(void) +{ + return sysdev_driver_register(&s3c2442_sysclass, &s3c2442_clk_driver); +} + +arch_initcall(s3c2442_clk_init); + + +static struct sys_device s3c2442_sysdev = { + .cls = &s3c2442_sysclass, +}; + +int __init s3c2442_init(void) +{ + printk("S3C2442: Initialising architecture\n"); + + return sysdev_register(&s3c2442_sysdev); +} -- cgit v1.2.3