bb072c3cf2
Replace sysdev classes and struct sys_device objects used for "core" power management by Samsung platforms with struct syscore_ops objects that are simpler. This generally reduces the code size and the kernel memory footprint. It also is necessary for removing sysdevs entirely from the kernel in the future. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Acked-by: Greg Kroah-Hartman <gregkh@suse.de> Acked-by: Kukjin Kim <kgene.kim@samsung.com>
184 lines
4.2 KiB
C
184 lines
4.2 KiB
C
/* linux/arch/arm/mach-s3c2410/s3c2410.c
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*
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* Copyright (c) 2003-2005 Simtec Electronics
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* Ben Dooks <ben@simtec.co.uk>
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*
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* http://www.simtec.co.uk/products/EB2410ITX/
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/kernel.h>
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#include <linux/types.h>
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#include <linux/interrupt.h>
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#include <linux/list.h>
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#include <linux/timer.h>
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#include <linux/init.h>
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#include <linux/gpio.h>
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#include <linux/clk.h>
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#include <linux/sysdev.h>
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#include <linux/syscore_ops.h>
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#include <linux/serial_core.h>
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#include <linux/platform_device.h>
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#include <linux/io.h>
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#include <asm/mach/arch.h>
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#include <asm/mach/map.h>
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#include <asm/mach/irq.h>
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#include <mach/hardware.h>
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#include <asm/irq.h>
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#include <plat/cpu-freq.h>
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#include <mach/regs-clock.h>
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#include <plat/regs-serial.h>
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#include <plat/s3c2410.h>
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#include <plat/cpu.h>
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#include <plat/devs.h>
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#include <plat/clock.h>
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#include <plat/pll.h>
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#include <plat/pm.h>
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#include <plat/gpio-core.h>
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#include <plat/gpio-cfg.h>
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#include <plat/gpio-cfg-helpers.h>
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/* Initial IO mappings */
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static struct map_desc s3c2410_iodesc[] __initdata = {
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IODESC_ENT(CLKPWR),
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IODESC_ENT(TIMER),
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IODESC_ENT(WATCHDOG),
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};
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/* our uart devices */
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/* uart registration process */
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void __init s3c2410_init_uarts(struct s3c2410_uartcfg *cfg, int no)
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{
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s3c24xx_init_uartdevs("s3c2410-uart", s3c2410_uart_resources, cfg, no);
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}
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/* s3c2410_map_io
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*
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* register the standard cpu IO areas, and any passed in from the
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* machine specific initialisation.
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*/
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void __init s3c2410_map_io(void)
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{
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s3c24xx_gpiocfg_default.set_pull = s3c_gpio_setpull_1up;
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s3c24xx_gpiocfg_default.get_pull = s3c_gpio_getpull_1up;
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iotable_init(s3c2410_iodesc, ARRAY_SIZE(s3c2410_iodesc));
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}
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void __init_or_cpufreq s3c2410_setup_clocks(void)
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{
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struct clk *xtal_clk;
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unsigned long tmp;
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unsigned long xtal;
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unsigned long fclk;
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unsigned long hclk;
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unsigned long pclk;
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xtal_clk = clk_get(NULL, "xtal");
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xtal = clk_get_rate(xtal_clk);
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clk_put(xtal_clk);
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/* now we've got our machine bits initialised, work out what
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* clocks we've got */
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fclk = s3c24xx_get_pll(__raw_readl(S3C2410_MPLLCON), xtal);
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tmp = __raw_readl(S3C2410_CLKDIVN);
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/* work out clock scalings */
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hclk = fclk / ((tmp & S3C2410_CLKDIVN_HDIVN) ? 2 : 1);
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pclk = hclk / ((tmp & S3C2410_CLKDIVN_PDIVN) ? 2 : 1);
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/* print brieft summary of clocks, etc */
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printk("S3C2410: core %ld.%03ld MHz, memory %ld.%03ld MHz, peripheral %ld.%03ld MHz\n",
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print_mhz(fclk), print_mhz(hclk), print_mhz(pclk));
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/* initialise the clocks here, to allow other things like the
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* console to use them
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*/
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s3c24xx_setup_clocks(fclk, hclk, pclk);
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}
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/* fake ARMCLK for use with cpufreq, etc. */
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static struct clk s3c2410_armclk = {
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.name = "armclk",
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.parent = &clk_f,
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.id = -1,
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};
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void __init s3c2410_init_clocks(int xtal)
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{
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s3c24xx_register_baseclocks(xtal);
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s3c2410_setup_clocks();
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s3c2410_baseclk_add();
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s3c24xx_register_clock(&s3c2410_armclk);
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}
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struct sysdev_class s3c2410_sysclass = {
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.name = "s3c2410-core",
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};
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/* Note, we would have liked to name this s3c2410-core, but we cannot
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* register two sysdev_class with the same name.
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*/
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struct sysdev_class s3c2410a_sysclass = {
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.name = "s3c2410a-core",
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};
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static struct sys_device s3c2410_sysdev = {
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.cls = &s3c2410_sysclass,
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};
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/* need to register class before we actually register the device, and
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* we also need to ensure that it has been initialised before any of the
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* drivers even try to use it (even if not on an s3c2410 based system)
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* as a driver which may support both 2410 and 2440 may try and use it.
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*/
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static int __init s3c2410_core_init(void)
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{
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return sysdev_class_register(&s3c2410_sysclass);
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}
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core_initcall(s3c2410_core_init);
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static int __init s3c2410a_core_init(void)
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{
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return sysdev_class_register(&s3c2410a_sysclass);
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}
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core_initcall(s3c2410a_core_init);
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int __init s3c2410_init(void)
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{
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printk("S3C2410: Initialising architecture\n");
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register_syscore_ops(&s3c2410_pm_syscore_ops);
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register_syscore_ops(&s3c24xx_irq_syscore_ops);
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return sysdev_register(&s3c2410_sysdev);
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}
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int __init s3c2410a_init(void)
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{
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s3c2410_sysdev.cls = &s3c2410a_sysclass;
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return s3c2410_init();
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}
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