/*
* Ralink RT288x SoC specific definitions
*
- * Copyright (C) 2008-2009 Gabor Juhos <juhosg@openwrt.org>
+ * Copyright (C) 2008-2011 Gabor Juhos <juhosg@openwrt.org>
* Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
*
* Parts of this file are based on Ralink's 2.6.21 BSP
#include <linux/io.h>
void rt288x_detect_sys_type(void);
-void rt288x_detect_sys_freq(void);
-
-extern unsigned long rt288x_cpu_freq;
-extern unsigned long rt288x_sys_freq;
#define RT288X_CPU_IRQ_BASE 0
#define RT288X_INTC_IRQ_BASE 8
# under the terms of the GNU General Public License version 2 as published
# by the Free Software Foundation.
-obj-y := irq.o setup.o rt288x.o devices.o
+obj-y := irq.o setup.o rt288x.o devices.o clock.o
obj-$(CONFIG_EARLY_PRINTK) += early_printk.o
--- /dev/null
+/*
+ * Ralink RT288X clock API
+ *
+ * Copyright (C) 2011 Gabor Juhos <juhosg@openwrt.org>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published
+ * by the Free Software Foundation.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/err.h>
+#include <linux/clk.h>
+
+#include <asm/mach-ralink/common.h>
+#include <asm/mach-ralink/rt288x.h>
+#include <asm/mach-ralink/rt288x_regs.h>
+#include "common.h"
+
+struct clk {
+ unsigned long rate;
+};
+
+static struct clk rt288x_cpu_clk;
+static struct clk rt288x_sys_clk;
+static struct clk rt288x_wdt_clk;
+static struct clk rt288x_uart_clk;
+
+void __init rt288x_clocks_init(void)
+{
+ u32 t;
+
+ t = rt288x_sysc_rr(SYSC_REG_SYSTEM_CONFIG);
+ t = ((t >> SYSTEM_CONFIG_CPUCLK_SHIFT) & SYSTEM_CONFIG_CPUCLK_MASK);
+
+ switch (t) {
+ case SYSTEM_CONFIG_CPUCLK_250:
+ rt288x_cpu_clk.rate = 250000000;
+ break;
+ case SYSTEM_CONFIG_CPUCLK_266:
+ rt288x_cpu_clk.rate = 266666667;
+ break;
+ case SYSTEM_CONFIG_CPUCLK_280:
+ rt288x_cpu_clk.rate = 280000000;
+ break;
+ case SYSTEM_CONFIG_CPUCLK_300:
+ rt288x_cpu_clk.rate = 300000000;
+ break;
+ }
+
+ rt288x_sys_clk.rate = rt288x_cpu_clk.rate / 2;
+ rt288x_uart_clk.rate = rt288x_sys_clk.rate;
+ rt288x_wdt_clk.rate = rt288x_sys_clk.rate;
+}
+
+/*
+ * Linux clock API
+ */
+struct clk *clk_get(struct device *dev, const char *id)
+{
+ if (!strcmp(id, "sys"))
+ return &rt288x_sys_clk;
+
+ if (!strcmp(id, "cpu"))
+ return &rt288x_cpu_clk;
+
+ if (!strcmp(id, "wdt"))
+ return &rt288x_wdt_clk;
+
+ if (!strcmp(id, "uart"))
+ return &rt288x_uart_clk;
+
+ return ERR_PTR(-ENOENT);
+}
+EXPORT_SYMBOL(clk_get);
+
+int clk_enable(struct clk *clk)
+{
+ return 0;
+}
+EXPORT_SYMBOL(clk_enable);
+
+void clk_disable(struct clk *clk)
+{
+}
+EXPORT_SYMBOL(clk_disable);
+
+unsigned long clk_get_rate(struct clk *clk)
+{
+ return clk->rate;
+}
+EXPORT_SYMBOL(clk_get_rate);
+
+void clk_put(struct clk *clk)
+{
+}
+EXPORT_SYMBOL(clk_put);
--- /dev/null
+/*
+ * Ralink RT288X SoC common defines
+ *
+ * Copyright (C) 2011 Gabor Juhos <juhosg@openwrt.org>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published
+ * by the Free Software Foundation.
+ */
+
+#ifndef _RT288X_COMMON_H
+#define _RT288X_COMMON_H
+
+void rt288x_clocks_init(void);
+
+#endif /* _RT288X_COMMON_H */
\ No newline at end of file
/*
* Ralink RT288x SoC platform device registration
*
- * Copyright (C) 2008 Gabor Juhos <juhosg@openwrt.org>
+ * Copyright (C) 2008-2011 Gabor Juhos <juhosg@openwrt.org>
* Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
*
* This program is free software; you can redistribute it and/or modify it
#include <linux/mtd/mtd.h>
#include <linux/mtd/physmap.h>
#include <linux/etherdevice.h>
+#include <linux/err.h>
+#include <linux/clk.h>
#include <asm/addrspace.h>
void __init rt288x_register_ethernet(void)
{
- rt288x_eth_data.sys_freq = rt288x_sys_freq;
+ struct clk *clk;
+
+ clk = clk_get(NULL, "sys");
+ if (IS_ERR(clk))
+ panic("unable to get SYS clock, err=%ld", PTR_ERR(clk));
+
+ rt288x_eth_data.sys_freq = clk_get_rate(clk);
rt288x_eth_data.reset_fe = rt288x_fe_reset;
rt288x_eth_data.min_pkt_len = 64;
#include <asm/mach-ralink/rt288x.h>
#include <asm/mach-ralink/rt288x_regs.h>
-unsigned long rt288x_cpu_freq;
-EXPORT_SYMBOL_GPL(rt288x_cpu_freq);
-
-unsigned long rt288x_sys_freq;
-EXPORT_SYMBOL_GPL(rt288x_sys_freq);
-
void __iomem * rt288x_sysc_base;
void __iomem * rt288x_memc_base;
(id & CHIP_ID_REV_MASK));
}
-void __init rt288x_detect_sys_freq(void)
-{
- u32 t;
-
- t = rt288x_sysc_rr(SYSC_REG_SYSTEM_CONFIG);
- t = ((t >> SYSTEM_CONFIG_CPUCLK_SHIFT) & SYSTEM_CONFIG_CPUCLK_MASK);
-
- switch (t) {
- case SYSTEM_CONFIG_CPUCLK_250:
- rt288x_cpu_freq = 250000000;
- break;
- case SYSTEM_CONFIG_CPUCLK_266:
- rt288x_cpu_freq = 266666667;
- break;
- case SYSTEM_CONFIG_CPUCLK_280:
- rt288x_cpu_freq = 280000000;
- break;
- case SYSTEM_CONFIG_CPUCLK_300:
- rt288x_cpu_freq = 300000000;
- break;
- }
-
- rt288x_sys_freq = rt288x_cpu_freq / 2;
-}
-
static void rt288x_gpio_reserve(int first, int last)
{
for (; first <= last; first++)
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/io.h>
+#include <linux/err.h>
+#include <linux/clk.h>
#include <asm/mips_machine.h>
#include <asm/reboot.h>
#include <asm/mach-ralink/common.h>
#include <asm/mach-ralink/rt288x.h>
#include <asm/mach-ralink/rt288x_regs.h>
+#include "common.h"
static void rt288x_restart(char *command)
{
void __init ramips_soc_setup(void)
{
+ struct clk *clk;
+
rt288x_sysc_base = ioremap_nocache(RT2880_SYSC_BASE, RT2880_SYSC_SIZE);
rt288x_memc_base = ioremap_nocache(RT2880_MEMC_BASE, RT2880_MEMC_SIZE);
rt288x_detect_sys_type();
- rt288x_detect_sys_freq();
+ rt288x_clocks_init();
+
+ clk = clk_get(NULL, "cpu");
+ if (IS_ERR(clk))
+ panic("unable to get CPU clock, err=%ld", PTR_ERR(clk));
printk(KERN_INFO "%s running at %lu.%02lu MHz\n", ramips_sys_type,
- rt288x_cpu_freq / 1000000,
- (rt288x_cpu_freq % 1000000) * 100 / 1000000);
+ clk_get_rate(clk) / 1000000,
+ (clk_get_rate(clk) % 1000000) * 100 / 1000000);
_machine_restart = rt288x_restart;
_machine_halt = rt288x_halt;
pm_power_off = rt288x_halt;
- ramips_early_serial_setup(0, RT2880_UART0_BASE, rt288x_sys_freq,
+ clk = clk_get(NULL, "uart");
+ if (IS_ERR(clk))
+ panic("unable to get UART clock, err=%ld", PTR_ERR(clk));
+
+ ramips_early_serial_setup(0, RT2880_UART0_BASE, clk_get_rate(clk),
RT2880_INTC_IRQ_UART0);
- ramips_early_serial_setup(1, RT2880_UART1_BASE, rt288x_sys_freq,
+ ramips_early_serial_setup(1, RT2880_UART1_BASE, clk_get_rate(clk),
RT2880_INTC_IRQ_UART1);
}
void __init plat_time_init(void)
{
- mips_hpt_frequency = rt288x_cpu_freq / 2;
+ struct clk *clk;
+
+ clk = clk_get(NULL, "cpu");
+ if (IS_ERR(clk))
+ panic("unable to get CPU clock, err=%ld", PTR_ERR(clk));
+
+ mips_hpt_frequency = clk_get_rate(clk) / 2;
}
projects / openwrt.git / commitdiff