96 lines
1.7 KiB
C
96 lines
1.7 KiB
C
/*
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* Copyright (C) 2009 ST-Ericsson
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* heavily based on realview platform
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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/module.h>
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#include <linux/kernel.h>
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#include <linux/list.h>
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#include <linux/errno.h>
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#include <linux/err.h>
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#include <linux/clk.h>
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#include <linux/mutex.h>
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#include <asm/clkdev.h>
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/* currently the clk structure
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* just supports rate. This would
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* be extended as and when new devices are
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* added - TODO
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*/
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struct clk {
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unsigned long rate;
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};
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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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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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long clk_round_rate(struct clk *clk, unsigned long rate)
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{
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/*TODO*/
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return rate;
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}
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EXPORT_SYMBOL(clk_round_rate);
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int clk_set_rate(struct clk *clk, unsigned long rate)
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{
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clk->rate = rate;
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return 0;
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}
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EXPORT_SYMBOL(clk_set_rate);
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/* ssp clock */
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static struct clk ssp_clk = {
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.rate = 48000000,
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};
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/* fixed clock */
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static struct clk f38_clk = {
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.rate = 38400000,
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};
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static struct clk_lookup lookups[] = {
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{
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/* UART0 */
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.dev_id = "uart0",
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.clk = &f38_clk,
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}, { /* UART1 */
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.dev_id = "uart1",
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.clk = &f38_clk,
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}, { /* UART2 */
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.dev_id = "uart2",
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.clk = &f38_clk,
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}, { /* SSP */
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.dev_id = "pl022",
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.clk = &ssp_clk,
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}
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};
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static int __init clk_init(void)
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{
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int i;
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/* register the clock lookups */
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for (i = 0; i < ARRAY_SIZE(lookups); i++)
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clkdev_add(&lookups[i]);
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return 0;
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}
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arch_initcall(clk_init);
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