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https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
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87a1b26c2d
Move the osc_clk clock functions from clock2xxx.c to mach-omap2/clkt2xxx_osc. This is intended to make the clock code easier to understand, since all of the functions needed to manage the osc_clk are now located in their own file, rather than being mixed with other, unrelated functions. Clock debugging is also now more finely-grained, since the DEBUG macro can now be defined for osc_clk clocks alone. This should reduce unnecessary console noise when debugging. Also, if at some future point the mach-omap2/ directory is split into OMAP2/3/4 variants, this clkt file can be placed in the mach-omap2xxx/ directory, rather than shared with other chip types that don't use this clock type. Thanks to Alexander Shishkin <virtuoso@slind.org> for his comments to improve the patch description. Signed-off-by: Paul Walmsley <paul@pwsan.com> Cc: Alexander Shishkin <virtuoso@slind.org>
63 lines
1.3 KiB
C
63 lines
1.3 KiB
C
/*
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* OMAP2xxx osc_clk-specific clock code
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*
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* Copyright (C) 2005-2008 Texas Instruments, Inc.
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* Copyright (C) 2004-2010 Nokia Corporation
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*
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* Contacts:
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* Richard Woodruff <r-woodruff2@ti.com>
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* Paul Walmsley
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*
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* Based on earlier work by Tuukka Tikkanen, Tony Lindgren,
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* Gordon McNutt and RidgeRun, Inc.
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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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#undef DEBUG
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/errno.h>
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#include <linux/clk.h>
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#include <linux/io.h>
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#include <plat/clock.h>
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#include "clock.h"
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#include "clock2xxx.h"
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#include "prm.h"
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#include "prm-regbits-24xx.h"
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static int omap2_enable_osc_ck(struct clk *clk)
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{
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u32 pcc;
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pcc = __raw_readl(prcm_clksrc_ctrl);
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__raw_writel(pcc & ~OMAP_AUTOEXTCLKMODE_MASK, prcm_clksrc_ctrl);
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return 0;
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}
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static void omap2_disable_osc_ck(struct clk *clk)
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{
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u32 pcc;
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pcc = __raw_readl(prcm_clksrc_ctrl);
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__raw_writel(pcc | OMAP_AUTOEXTCLKMODE_MASK, prcm_clksrc_ctrl);
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}
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const struct clkops clkops_oscck = {
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.enable = omap2_enable_osc_ck,
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.disable = omap2_disable_osc_ck,
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};
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unsigned long omap2_osc_clk_recalc(struct clk *clk)
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{
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return omap2xxx_get_apll_clkin() * omap2xxx_get_sysclkdiv();
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}
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