6d803ba736
factorise some generic infrastructure to assist looking up struct clks for the ARM & SH architecture. as the code is identical at 99% put the arch specific code for allocation as example in asm/clkdev.h Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> Acked-by: Paul Mundt <lethal@linux-sh.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
76 lines
1.4 KiB
C
76 lines
1.4 KiB
C
/*
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* linux/arch/arm/mach-nomadik/clock.c
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*
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* Copyright (C) 2009 Alessandro Rubini
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/errno.h>
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#include <linux/clk.h>
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#include <linux/clkdev.h>
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#include "clock.h"
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/*
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* The nomadik board uses generic clocks, but the serial pl011 file
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* calls clk_enable(), clk_disable(), clk_get_rate(), so we provide them
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*/
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unsigned long clk_get_rate(struct clk *clk)
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{
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return clk->rate;
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}
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EXPORT_SYMBOL(clk_get_rate);
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/* enable and disable do nothing */
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int clk_enable(struct clk *clk)
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{
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return 0;
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}
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EXPORT_SYMBOL(clk_enable);
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void clk_disable(struct clk *clk)
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{
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}
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EXPORT_SYMBOL(clk_disable);
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static struct clk clk_24 = {
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.rate = 2400000,
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};
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static struct clk clk_48 = {
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.rate = 48 * 1000 * 1000,
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};
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/*
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* Catch-all default clock to satisfy drivers using the clk API. We don't
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* model the actual hardware clocks yet.
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*/
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static struct clk clk_default;
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#define CLK(_clk, dev) \
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{ \
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.clk = _clk, \
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.dev_id = dev, \
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}
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static struct clk_lookup lookups[] = {
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{
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.con_id = "apb_pclk",
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.clk = &clk_default,
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},
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CLK(&clk_24, "mtu0"),
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CLK(&clk_24, "mtu1"),
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CLK(&clk_48, "uart0"),
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CLK(&clk_48, "uart1"),
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CLK(&clk_default, "gpio.0"),
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CLK(&clk_default, "gpio.1"),
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CLK(&clk_default, "gpio.2"),
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CLK(&clk_default, "gpio.3"),
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CLK(&clk_default, "rng"),
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};
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int __init clk_init(void)
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{
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clkdev_add_table(lookups, ARRAY_SIZE(lookups));
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return 0;
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}
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