mirror of https://gitee.com/openkylin/linux.git
724 lines
18 KiB
C
724 lines
18 KiB
C
/*
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* Copyright (C) 2009 ST-Ericsson
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* Copyright (C) 2009 STMicroelectronics
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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/io.h>
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#include <linux/clkdev.h>
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#include <linux/cpufreq.h>
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#include <plat/mtu.h>
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#include <mach/hardware.h>
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#include "clock.h"
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#ifdef CONFIG_DEBUG_FS
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#include <linux/debugfs.h>
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#include <linux/uaccess.h> /* for copy_from_user */
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static LIST_HEAD(clk_list);
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#endif
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#define PRCC_PCKEN 0x00
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#define PRCC_PCKDIS 0x04
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#define PRCC_KCKEN 0x08
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#define PRCC_KCKDIS 0x0C
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#define PRCM_YYCLKEN0_MGT_SET 0x510
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#define PRCM_YYCLKEN1_MGT_SET 0x514
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#define PRCM_YYCLKEN0_MGT_CLR 0x518
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#define PRCM_YYCLKEN1_MGT_CLR 0x51C
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#define PRCM_YYCLKEN0_MGT_VAL 0x520
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#define PRCM_YYCLKEN1_MGT_VAL 0x524
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#define PRCM_SVAMMDSPCLK_MGT 0x008
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#define PRCM_SIAMMDSPCLK_MGT 0x00C
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#define PRCM_SGACLK_MGT 0x014
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#define PRCM_UARTCLK_MGT 0x018
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#define PRCM_MSP02CLK_MGT 0x01C
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#define PRCM_MSP1CLK_MGT 0x288
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#define PRCM_I2CCLK_MGT 0x020
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#define PRCM_SDMMCCLK_MGT 0x024
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#define PRCM_SLIMCLK_MGT 0x028
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#define PRCM_PER1CLK_MGT 0x02C
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#define PRCM_PER2CLK_MGT 0x030
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#define PRCM_PER3CLK_MGT 0x034
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#define PRCM_PER5CLK_MGT 0x038
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#define PRCM_PER6CLK_MGT 0x03C
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#define PRCM_PER7CLK_MGT 0x040
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#define PRCM_LCDCLK_MGT 0x044
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#define PRCM_BMLCLK_MGT 0x04C
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#define PRCM_HSITXCLK_MGT 0x050
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#define PRCM_HSIRXCLK_MGT 0x054
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#define PRCM_HDMICLK_MGT 0x058
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#define PRCM_APEATCLK_MGT 0x05C
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#define PRCM_APETRACECLK_MGT 0x060
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#define PRCM_MCDECLK_MGT 0x064
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#define PRCM_IPI2CCLK_MGT 0x068
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#define PRCM_DSIALTCLK_MGT 0x06C
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#define PRCM_DMACLK_MGT 0x074
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#define PRCM_B2R2CLK_MGT 0x078
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#define PRCM_TVCLK_MGT 0x07C
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#define PRCM_TCR 0x1C8
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#define PRCM_TCR_STOPPED (1 << 16)
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#define PRCM_TCR_DOZE_MODE (1 << 17)
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#define PRCM_UNIPROCLK_MGT 0x278
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#define PRCM_SSPCLK_MGT 0x280
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#define PRCM_RNGCLK_MGT 0x284
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#define PRCM_UICCCLK_MGT 0x27C
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#define PRCM_MGT_ENABLE (1 << 8)
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static DEFINE_SPINLOCK(clocks_lock);
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static void __clk_enable(struct clk *clk)
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{
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if (clk->enabled++ == 0) {
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if (clk->parent_cluster)
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__clk_enable(clk->parent_cluster);
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if (clk->parent_periph)
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__clk_enable(clk->parent_periph);
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if (clk->ops && clk->ops->enable)
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clk->ops->enable(clk);
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}
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}
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int clk_enable(struct clk *clk)
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{
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unsigned long flags;
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spin_lock_irqsave(&clocks_lock, flags);
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__clk_enable(clk);
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spin_unlock_irqrestore(&clocks_lock, flags);
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return 0;
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}
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EXPORT_SYMBOL(clk_enable);
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static void __clk_disable(struct clk *clk)
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{
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if (--clk->enabled == 0) {
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if (clk->ops && clk->ops->disable)
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clk->ops->disable(clk);
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if (clk->parent_periph)
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__clk_disable(clk->parent_periph);
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if (clk->parent_cluster)
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__clk_disable(clk->parent_cluster);
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}
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}
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void clk_disable(struct clk *clk)
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{
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unsigned long flags;
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WARN_ON(!clk->enabled);
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spin_lock_irqsave(&clocks_lock, flags);
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__clk_disable(clk);
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spin_unlock_irqrestore(&clocks_lock, flags);
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}
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EXPORT_SYMBOL(clk_disable);
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/*
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* The MTU has a separate, rather complex muxing setup
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* with alternative parents (peripheral cluster or
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* ULP or fixed 32768 Hz) depending on settings
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*/
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static unsigned long clk_mtu_get_rate(struct clk *clk)
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{
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void __iomem *addr;
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u32 tcr;
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int mtu = (int) clk->data;
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/*
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* One of these is selected eventually
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* TODO: Replace the constant with a reference
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* to the ULP source once this is modeled.
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*/
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unsigned long clk32k = 32768;
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unsigned long mturate;
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unsigned long retclk;
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if (cpu_is_u5500())
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addr = __io_address(U5500_PRCMU_BASE);
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else if (cpu_is_u8500())
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addr = __io_address(U8500_PRCMU_BASE);
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else
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ux500_unknown_soc();
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/*
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* On a startup, always conifgure the TCR to the doze mode;
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* bootloaders do it for us. Do this in the kernel too.
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*/
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writel(PRCM_TCR_DOZE_MODE, addr + PRCM_TCR);
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tcr = readl(addr + PRCM_TCR);
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/* Get the rate from the parent as a default */
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if (clk->parent_periph)
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mturate = clk_get_rate(clk->parent_periph);
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else if (clk->parent_cluster)
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mturate = clk_get_rate(clk->parent_cluster);
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else
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/* We need to be connected SOMEWHERE */
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BUG();
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/* Return the clock selected for this MTU */
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if (tcr & (1 << mtu))
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retclk = clk32k;
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else
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retclk = mturate;
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pr_info("MTU%d clock rate: %lu Hz\n", mtu, retclk);
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return retclk;
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}
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unsigned long clk_get_rate(struct clk *clk)
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{
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unsigned long rate;
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/*
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* If there is a custom getrate callback for this clock,
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* it will take precedence.
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*/
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if (clk->get_rate)
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return clk->get_rate(clk);
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if (clk->ops && clk->ops->get_rate)
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return clk->ops->get_rate(clk);
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rate = clk->rate;
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if (!rate) {
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if (clk->parent_periph)
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rate = clk_get_rate(clk->parent_periph);
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else if (clk->parent_cluster)
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rate = clk_get_rate(clk->parent_cluster);
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}
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return 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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int clk_set_parent(struct clk *clk, struct clk *parent)
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{
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/*TODO*/
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return -ENOSYS;
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}
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EXPORT_SYMBOL(clk_set_parent);
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static void clk_prcmu_enable(struct clk *clk)
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{
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void __iomem *cg_set_reg = __io_address(U8500_PRCMU_BASE)
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+ PRCM_YYCLKEN0_MGT_SET + clk->prcmu_cg_off;
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writel(1 << clk->prcmu_cg_bit, cg_set_reg);
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}
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static void clk_prcmu_disable(struct clk *clk)
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{
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void __iomem *cg_clr_reg = __io_address(U8500_PRCMU_BASE)
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+ PRCM_YYCLKEN0_MGT_CLR + clk->prcmu_cg_off;
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writel(1 << clk->prcmu_cg_bit, cg_clr_reg);
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}
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static struct clkops clk_prcmu_ops = {
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.enable = clk_prcmu_enable,
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.disable = clk_prcmu_disable,
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};
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static unsigned int clkrst_base[] = {
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[1] = U8500_CLKRST1_BASE,
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[2] = U8500_CLKRST2_BASE,
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[3] = U8500_CLKRST3_BASE,
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[5] = U8500_CLKRST5_BASE,
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[6] = U8500_CLKRST6_BASE,
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};
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static void clk_prcc_enable(struct clk *clk)
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{
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void __iomem *addr = __io_address(clkrst_base[clk->cluster]);
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if (clk->prcc_kernel != -1)
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writel(1 << clk->prcc_kernel, addr + PRCC_KCKEN);
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if (clk->prcc_bus != -1)
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writel(1 << clk->prcc_bus, addr + PRCC_PCKEN);
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}
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static void clk_prcc_disable(struct clk *clk)
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{
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void __iomem *addr = __io_address(clkrst_base[clk->cluster]);
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if (clk->prcc_bus != -1)
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writel(1 << clk->prcc_bus, addr + PRCC_PCKDIS);
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if (clk->prcc_kernel != -1)
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writel(1 << clk->prcc_kernel, addr + PRCC_KCKDIS);
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}
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static struct clkops clk_prcc_ops = {
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.enable = clk_prcc_enable,
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.disable = clk_prcc_disable,
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};
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static struct clk clk_32khz = {
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.name = "clk_32khz",
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.rate = 32000,
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};
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/*
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* PRCMU level clock gating
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*/
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/* Bank 0 */
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static DEFINE_PRCMU_CLK(svaclk, 0x0, 2, SVAMMDSPCLK);
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static DEFINE_PRCMU_CLK(siaclk, 0x0, 3, SIAMMDSPCLK);
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static DEFINE_PRCMU_CLK(sgaclk, 0x0, 4, SGACLK);
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static DEFINE_PRCMU_CLK_RATE(uartclk, 0x0, 5, UARTCLK, 38400000);
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static DEFINE_PRCMU_CLK(msp02clk, 0x0, 6, MSP02CLK);
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static DEFINE_PRCMU_CLK(msp1clk, 0x0, 7, MSP1CLK); /* v1 */
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static DEFINE_PRCMU_CLK_RATE(i2cclk, 0x0, 8, I2CCLK, 48000000);
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static DEFINE_PRCMU_CLK_RATE(sdmmcclk, 0x0, 9, SDMMCCLK, 100000000);
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static DEFINE_PRCMU_CLK(slimclk, 0x0, 10, SLIMCLK);
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static DEFINE_PRCMU_CLK(per1clk, 0x0, 11, PER1CLK);
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static DEFINE_PRCMU_CLK(per2clk, 0x0, 12, PER2CLK);
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static DEFINE_PRCMU_CLK(per3clk, 0x0, 13, PER3CLK);
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static DEFINE_PRCMU_CLK(per5clk, 0x0, 14, PER5CLK);
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static DEFINE_PRCMU_CLK_RATE(per6clk, 0x0, 15, PER6CLK, 133330000);
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static DEFINE_PRCMU_CLK(lcdclk, 0x0, 17, LCDCLK);
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static DEFINE_PRCMU_CLK(bmlclk, 0x0, 18, BMLCLK);
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static DEFINE_PRCMU_CLK(hsitxclk, 0x0, 19, HSITXCLK);
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static DEFINE_PRCMU_CLK(hsirxclk, 0x0, 20, HSIRXCLK);
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static DEFINE_PRCMU_CLK(hdmiclk, 0x0, 21, HDMICLK);
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static DEFINE_PRCMU_CLK(apeatclk, 0x0, 22, APEATCLK);
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static DEFINE_PRCMU_CLK(apetraceclk, 0x0, 23, APETRACECLK);
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static DEFINE_PRCMU_CLK(mcdeclk, 0x0, 24, MCDECLK);
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static DEFINE_PRCMU_CLK(ipi2clk, 0x0, 25, IPI2CCLK);
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static DEFINE_PRCMU_CLK(dsialtclk, 0x0, 26, DSIALTCLK); /* v1 */
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static DEFINE_PRCMU_CLK(dmaclk, 0x0, 27, DMACLK);
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static DEFINE_PRCMU_CLK(b2r2clk, 0x0, 28, B2R2CLK);
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static DEFINE_PRCMU_CLK(tvclk, 0x0, 29, TVCLK);
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static DEFINE_PRCMU_CLK(uniproclk, 0x0, 30, UNIPROCLK); /* v1 */
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static DEFINE_PRCMU_CLK_RATE(sspclk, 0x0, 31, SSPCLK, 48000000); /* v1 */
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/* Bank 1 */
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static DEFINE_PRCMU_CLK(rngclk, 0x4, 0, RNGCLK); /* v1 */
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static DEFINE_PRCMU_CLK(uiccclk, 0x4, 1, UICCCLK); /* v1 */
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/*
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* PRCC level clock gating
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* Format: per#, clk, PCKEN bit, KCKEN bit, parent
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*/
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/* Peripheral Cluster #1 */
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static DEFINE_PRCC_CLK(1, i2c4, 10, 9, &clk_i2cclk);
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static DEFINE_PRCC_CLK(1, gpio0, 9, -1, NULL);
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static DEFINE_PRCC_CLK(1, slimbus0, 8, 8, &clk_slimclk);
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static DEFINE_PRCC_CLK(1, spi3, 7, -1, NULL);
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static DEFINE_PRCC_CLK(1, i2c2, 6, 6, &clk_i2cclk);
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static DEFINE_PRCC_CLK(1, sdi0, 5, 5, &clk_sdmmcclk);
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static DEFINE_PRCC_CLK(1, msp1, 4, 4, &clk_msp1clk);
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static DEFINE_PRCC_CLK(1, msp0, 3, 3, &clk_msp02clk);
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static DEFINE_PRCC_CLK(1, i2c1, 2, 2, &clk_i2cclk);
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static DEFINE_PRCC_CLK(1, uart1, 1, 1, &clk_uartclk);
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static DEFINE_PRCC_CLK(1, uart0, 0, 0, &clk_uartclk);
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/* Peripheral Cluster #2 */
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static DEFINE_PRCC_CLK(2, gpio1, 11, -1, NULL);
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static DEFINE_PRCC_CLK(2, ssitx, 10, 7, NULL);
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static DEFINE_PRCC_CLK(2, ssirx, 9, 6, NULL);
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static DEFINE_PRCC_CLK(2, spi0, 8, -1, NULL);
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static DEFINE_PRCC_CLK(2, sdi3, 7, 5, &clk_sdmmcclk);
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static DEFINE_PRCC_CLK(2, sdi1, 6, 4, &clk_sdmmcclk);
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static DEFINE_PRCC_CLK(2, msp2, 5, 3, &clk_msp02clk);
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static DEFINE_PRCC_CLK(2, sdi4, 4, 2, &clk_sdmmcclk);
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static DEFINE_PRCC_CLK(2, pwl, 3, 1, NULL);
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static DEFINE_PRCC_CLK(2, spi1, 2, -1, NULL);
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static DEFINE_PRCC_CLK(2, spi2, 1, -1, NULL);
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static DEFINE_PRCC_CLK(2, i2c3, 0, 0, &clk_i2cclk);
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/* Peripheral Cluster #3 */
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static DEFINE_PRCC_CLK(3, gpio2, 8, -1, NULL);
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static DEFINE_PRCC_CLK(3, sdi5, 7, 7, &clk_sdmmcclk);
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static DEFINE_PRCC_CLK(3, uart2, 6, 6, &clk_uartclk);
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static DEFINE_PRCC_CLK(3, ske, 5, 5, &clk_32khz);
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static DEFINE_PRCC_CLK(3, sdi2, 4, 4, &clk_sdmmcclk);
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static DEFINE_PRCC_CLK(3, i2c0, 3, 3, &clk_i2cclk);
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static DEFINE_PRCC_CLK(3, ssp1, 2, 2, &clk_sspclk);
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static DEFINE_PRCC_CLK(3, ssp0, 1, 1, &clk_sspclk);
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static DEFINE_PRCC_CLK(3, fsmc, 0, -1, NULL);
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/* Peripheral Cluster #4 is in the always on domain */
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/* Peripheral Cluster #5 */
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static DEFINE_PRCC_CLK(5, gpio3, 1, -1, NULL);
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static DEFINE_PRCC_CLK(5, usb, 0, 0, NULL);
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/* Peripheral Cluster #6 */
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/* MTU ID in data */
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static DEFINE_PRCC_CLK_CUSTOM(6, mtu1, 8, -1, NULL, clk_mtu_get_rate, 1);
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static DEFINE_PRCC_CLK_CUSTOM(6, mtu0, 7, -1, NULL, clk_mtu_get_rate, 0);
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static DEFINE_PRCC_CLK(6, cfgreg, 6, 6, NULL);
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static DEFINE_PRCC_CLK(6, hash1, 5, -1, NULL);
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static DEFINE_PRCC_CLK(6, unipro, 4, 1, &clk_uniproclk);
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static DEFINE_PRCC_CLK(6, pka, 3, -1, NULL);
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static DEFINE_PRCC_CLK(6, hash0, 2, -1, NULL);
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static DEFINE_PRCC_CLK(6, cryp0, 1, -1, NULL);
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static DEFINE_PRCC_CLK(6, rng, 0, 0, &clk_rngclk);
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static struct clk clk_dummy_apb_pclk = {
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.name = "apb_pclk",
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};
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static struct clk_lookup u8500_clks[] = {
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CLK(dummy_apb_pclk, NULL, "apb_pclk"),
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/* Peripheral Cluster #1 */
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CLK(gpio0, "gpio.0", NULL),
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CLK(gpio0, "gpio.1", NULL),
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CLK(slimbus0, "slimbus0", NULL),
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CLK(i2c2, "nmk-i2c.2", NULL),
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CLK(sdi0, "sdi0", NULL),
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CLK(msp0, "msp0", NULL),
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CLK(i2c1, "nmk-i2c.1", NULL),
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CLK(uart1, "uart1", NULL),
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CLK(uart0, "uart0", NULL),
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/* Peripheral Cluster #3 */
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CLK(gpio2, "gpio.2", NULL),
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CLK(gpio2, "gpio.3", NULL),
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CLK(gpio2, "gpio.4", NULL),
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CLK(gpio2, "gpio.5", NULL),
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CLK(sdi5, "sdi5", NULL),
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CLK(uart2, "uart2", NULL),
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CLK(ske, "ske", NULL),
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CLK(ske, "nmk-ske-keypad", NULL),
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CLK(sdi2, "sdi2", NULL),
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CLK(i2c0, "nmk-i2c.0", NULL),
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CLK(fsmc, "fsmc", NULL),
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/* Peripheral Cluster #5 */
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CLK(gpio3, "gpio.8", NULL),
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/* Peripheral Cluster #6 */
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CLK(hash1, "hash1", NULL),
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CLK(pka, "pka", NULL),
|
|
CLK(hash0, "hash0", NULL),
|
|
CLK(cryp0, "cryp0", NULL),
|
|
|
|
/* PRCMU level clock gating */
|
|
|
|
/* Bank 0 */
|
|
CLK(svaclk, "sva", NULL),
|
|
CLK(siaclk, "sia", NULL),
|
|
CLK(sgaclk, "sga", NULL),
|
|
CLK(slimclk, "slim", NULL),
|
|
CLK(lcdclk, "lcd", NULL),
|
|
CLK(bmlclk, "bml", NULL),
|
|
CLK(hsitxclk, "stm-hsi.0", NULL),
|
|
CLK(hsirxclk, "stm-hsi.1", NULL),
|
|
CLK(hdmiclk, "hdmi", NULL),
|
|
CLK(apeatclk, "apeat", NULL),
|
|
CLK(apetraceclk, "apetrace", NULL),
|
|
CLK(mcdeclk, "mcde", NULL),
|
|
CLK(ipi2clk, "ipi2", NULL),
|
|
CLK(dmaclk, "dma40.0", NULL),
|
|
CLK(b2r2clk, "b2r2", NULL),
|
|
CLK(tvclk, "tv", NULL),
|
|
|
|
/* Peripheral Cluster #1 */
|
|
CLK(i2c4, "nmk-i2c.4", NULL),
|
|
CLK(spi3, "spi3", NULL),
|
|
CLK(msp1, "msp1", NULL),
|
|
|
|
/* Peripheral Cluster #2 */
|
|
CLK(gpio1, "gpio.6", NULL),
|
|
CLK(gpio1, "gpio.7", NULL),
|
|
CLK(ssitx, "ssitx", NULL),
|
|
CLK(ssirx, "ssirx", NULL),
|
|
CLK(spi0, "spi0", NULL),
|
|
CLK(sdi3, "sdi3", NULL),
|
|
CLK(sdi1, "sdi1", NULL),
|
|
CLK(msp2, "msp2", NULL),
|
|
CLK(sdi4, "sdi4", NULL),
|
|
CLK(pwl, "pwl", NULL),
|
|
CLK(spi1, "spi1", NULL),
|
|
CLK(spi2, "spi2", NULL),
|
|
CLK(i2c3, "nmk-i2c.3", NULL),
|
|
|
|
/* Peripheral Cluster #3 */
|
|
CLK(ssp1, "ssp1", NULL),
|
|
CLK(ssp0, "ssp0", NULL),
|
|
|
|
/* Peripheral Cluster #5 */
|
|
CLK(usb, "musb-ux500.0", "usb"),
|
|
|
|
/* Peripheral Cluster #6 */
|
|
CLK(mtu1, "mtu1", NULL),
|
|
CLK(mtu0, "mtu0", NULL),
|
|
CLK(cfgreg, "cfgreg", NULL),
|
|
CLK(hash1, "hash1", NULL),
|
|
CLK(unipro, "unipro", NULL),
|
|
CLK(rng, "rng", NULL),
|
|
|
|
/* PRCMU level clock gating */
|
|
|
|
/* Bank 0 */
|
|
CLK(uniproclk, "uniproclk", NULL),
|
|
CLK(dsialtclk, "dsialt", NULL),
|
|
|
|
/* Bank 1 */
|
|
CLK(rngclk, "rng", NULL),
|
|
CLK(uiccclk, "uicc", NULL),
|
|
};
|
|
|
|
#ifdef CONFIG_DEBUG_FS
|
|
/*
|
|
* debugfs support to trace clock tree hierarchy and attributes with
|
|
* powerdebug
|
|
*/
|
|
static struct dentry *clk_debugfs_root;
|
|
|
|
void __init clk_debugfs_add_table(struct clk_lookup *cl, size_t num)
|
|
{
|
|
while (num--) {
|
|
/* Check that the clock has not been already registered */
|
|
if (!(cl->clk->list.prev != cl->clk->list.next))
|
|
list_add_tail(&cl->clk->list, &clk_list);
|
|
|
|
cl++;
|
|
}
|
|
}
|
|
|
|
static ssize_t usecount_dbg_read(struct file *file, char __user *buf,
|
|
size_t size, loff_t *off)
|
|
{
|
|
struct clk *clk = file->f_dentry->d_inode->i_private;
|
|
char cusecount[128];
|
|
unsigned int len;
|
|
|
|
len = sprintf(cusecount, "%u\n", clk->enabled);
|
|
return simple_read_from_buffer(buf, size, off, cusecount, len);
|
|
}
|
|
|
|
static ssize_t rate_dbg_read(struct file *file, char __user *buf,
|
|
size_t size, loff_t *off)
|
|
{
|
|
struct clk *clk = file->f_dentry->d_inode->i_private;
|
|
char crate[128];
|
|
unsigned int rate;
|
|
unsigned int len;
|
|
|
|
rate = clk_get_rate(clk);
|
|
len = sprintf(crate, "%u\n", rate);
|
|
return simple_read_from_buffer(buf, size, off, crate, len);
|
|
}
|
|
|
|
static const struct file_operations usecount_fops = {
|
|
.read = usecount_dbg_read,
|
|
};
|
|
|
|
static const struct file_operations set_rate_fops = {
|
|
.read = rate_dbg_read,
|
|
};
|
|
|
|
static struct dentry *clk_debugfs_register_dir(struct clk *c,
|
|
struct dentry *p_dentry)
|
|
{
|
|
struct dentry *d, *clk_d;
|
|
const char *p = c->name;
|
|
|
|
if (!p)
|
|
p = "BUG";
|
|
|
|
clk_d = debugfs_create_dir(p, p_dentry);
|
|
if (!clk_d)
|
|
return NULL;
|
|
|
|
d = debugfs_create_file("usecount", S_IRUGO,
|
|
clk_d, c, &usecount_fops);
|
|
if (!d)
|
|
goto err_out;
|
|
d = debugfs_create_file("rate", S_IRUGO,
|
|
clk_d, c, &set_rate_fops);
|
|
if (!d)
|
|
goto err_out;
|
|
/*
|
|
* TODO : not currently available in ux500
|
|
* d = debugfs_create_x32("flags", S_IRUGO, clk_d, (u32 *)&c->flags);
|
|
* if (!d)
|
|
* goto err_out;
|
|
*/
|
|
|
|
return clk_d;
|
|
|
|
err_out:
|
|
debugfs_remove_recursive(clk_d);
|
|
return NULL;
|
|
}
|
|
|
|
static int clk_debugfs_register_one(struct clk *c)
|
|
{
|
|
struct clk *pa = c->parent_periph;
|
|
struct clk *bpa = c->parent_cluster;
|
|
|
|
if (!(bpa && !pa)) {
|
|
c->dent = clk_debugfs_register_dir(c,
|
|
pa ? pa->dent : clk_debugfs_root);
|
|
if (!c->dent)
|
|
return -ENOMEM;
|
|
}
|
|
|
|
if (bpa) {
|
|
c->dent_bus = clk_debugfs_register_dir(c,
|
|
bpa->dent_bus ? bpa->dent_bus : bpa->dent);
|
|
if ((!c->dent_bus) && (c->dent)) {
|
|
debugfs_remove_recursive(c->dent);
|
|
c->dent = NULL;
|
|
return -ENOMEM;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int clk_debugfs_register(struct clk *c)
|
|
{
|
|
int err;
|
|
struct clk *pa = c->parent_periph;
|
|
struct clk *bpa = c->parent_cluster;
|
|
|
|
if (pa && (!pa->dent && !pa->dent_bus)) {
|
|
err = clk_debugfs_register(pa);
|
|
if (err)
|
|
return err;
|
|
}
|
|
|
|
if (bpa && (!bpa->dent && !bpa->dent_bus)) {
|
|
err = clk_debugfs_register(bpa);
|
|
if (err)
|
|
return err;
|
|
}
|
|
|
|
if ((!c->dent) && (!c->dent_bus)) {
|
|
err = clk_debugfs_register_one(c);
|
|
if (err)
|
|
return err;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int __init clk_debugfs_init(void)
|
|
{
|
|
struct clk *c;
|
|
struct dentry *d;
|
|
int err;
|
|
|
|
d = debugfs_create_dir("clock", NULL);
|
|
if (!d)
|
|
return -ENOMEM;
|
|
clk_debugfs_root = d;
|
|
|
|
list_for_each_entry(c, &clk_list, list) {
|
|
err = clk_debugfs_register(c);
|
|
if (err)
|
|
goto err_out;
|
|
}
|
|
return 0;
|
|
err_out:
|
|
debugfs_remove_recursive(clk_debugfs_root);
|
|
return err;
|
|
}
|
|
|
|
late_initcall(clk_debugfs_init);
|
|
#endif /* defined(CONFIG_DEBUG_FS) */
|
|
|
|
unsigned long clk_smp_twd_rate = 500000000;
|
|
|
|
unsigned long clk_smp_twd_get_rate(struct clk *clk)
|
|
{
|
|
return clk_smp_twd_rate;
|
|
}
|
|
|
|
static struct clk clk_smp_twd = {
|
|
.get_rate = clk_smp_twd_get_rate,
|
|
.name = "smp_twd",
|
|
};
|
|
|
|
static struct clk_lookup clk_smp_twd_lookup = {
|
|
.dev_id = "smp_twd",
|
|
.clk = &clk_smp_twd,
|
|
};
|
|
|
|
#ifdef CONFIG_CPU_FREQ
|
|
|
|
static int clk_twd_cpufreq_transition(struct notifier_block *nb,
|
|
unsigned long state, void *data)
|
|
{
|
|
struct cpufreq_freqs *f = data;
|
|
|
|
if (state == CPUFREQ_PRECHANGE) {
|
|
/* Save frequency in simple Hz */
|
|
clk_smp_twd_rate = (f->new * 1000) / 2;
|
|
}
|
|
|
|
return NOTIFY_OK;
|
|
}
|
|
|
|
static struct notifier_block clk_twd_cpufreq_nb = {
|
|
.notifier_call = clk_twd_cpufreq_transition,
|
|
};
|
|
|
|
static int clk_init_smp_twd_cpufreq(void)
|
|
{
|
|
return cpufreq_register_notifier(&clk_twd_cpufreq_nb,
|
|
CPUFREQ_TRANSITION_NOTIFIER);
|
|
}
|
|
late_initcall(clk_init_smp_twd_cpufreq);
|
|
|
|
#endif
|
|
|
|
int __init clk_init(void)
|
|
{
|
|
if (cpu_is_u5500()) {
|
|
/* Clock tree for U5500 not implemented yet */
|
|
clk_prcc_ops.enable = clk_prcc_ops.disable = NULL;
|
|
clk_prcmu_ops.enable = clk_prcmu_ops.disable = NULL;
|
|
clk_uartclk.rate = 36360000;
|
|
clk_sdmmcclk.rate = 99900000;
|
|
}
|
|
|
|
clkdev_add_table(u8500_clks, ARRAY_SIZE(u8500_clks));
|
|
clkdev_add(&clk_smp_twd_lookup);
|
|
|
|
#ifdef CONFIG_DEBUG_FS
|
|
clk_debugfs_add_table(u8500_clks, ARRAY_SIZE(u8500_clks));
|
|
#endif
|
|
return 0;
|
|
}
|