powerpc/5xxx: Add common mpc5xxx_get_bus_frequency() function
So far, MPC512x used mpc512x_find_ips_freq() to get the bus frequency, while MPC52xx used mpc52xx_find_ipb_freq(). Despite the different clock names (IPS vs. IPB) the code was identical. Use common code for both processor families. Signed-off-by: Wolfgang Denk <wd@denx.de> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
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@ -16,6 +16,7 @@
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#ifndef __ASSEMBLY__
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#include <asm/types.h>
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#include <asm/prom.h>
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#include <asm/mpc5xxx.h>
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#endif /* __ASSEMBLY__ */
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#include <linux/suspend.h>
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@ -268,7 +269,6 @@ struct mpc52xx_intr {
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#ifndef __ASSEMBLY__
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/* mpc52xx_common.c */
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extern unsigned int mpc52xx_find_ipb_freq(struct device_node *node);
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extern void mpc5200_setup_xlb_arbiter(void);
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extern void mpc52xx_declare_of_platform_devices(void);
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extern void mpc52xx_map_common_devices(void);
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@ -4,7 +4,7 @@
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* Author: John Rigby, <jrigby@freescale.com>, Friday Apr 13 2007
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*
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* Description:
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* MPC5121 Prototypes and definitions
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* MPC5xxx Prototypes and definitions
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*
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* This is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by
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@ -13,10 +13,10 @@
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*
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*/
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#ifndef __ASM_POWERPC_MPC512x_H__
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#define __ASM_POWERPC_MPC512x_H__
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#ifndef __ASM_POWERPC_MPC5xxx_H__
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#define __ASM_POWERPC_MPC5xxx_H__
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extern unsigned long mpc512x_find_ips_freq(struct device_node *node);
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extern unsigned long mpc5xxx_get_bus_frequency(struct device_node *node);
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#endif /* __ASM_POWERPC_MPC512x_H__ */
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#endif /* __ASM_POWERPC_MPC5xxx_H__ */
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@ -24,7 +24,7 @@
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#include <linux/io.h>
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#include <linux/of_platform.h>
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#include <asm/mpc512x.h>
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#include <asm/mpc5xxx.h>
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#include <asm/clk_interface.h>
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#undef CLK_DEBUG
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@ -11,7 +11,6 @@
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#ifndef __MPC512X_H__
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#define __MPC512X_H__
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extern unsigned long mpc512x_find_ips_freq(struct device_node *node);
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extern void __init mpc512x_init_IRQ(void);
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void __init mpc512x_declare_of_platform_devices(void);
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#endif /* __MPC512X_H__ */
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@ -24,29 +24,6 @@
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#include "mpc512x.h"
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unsigned long
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mpc512x_find_ips_freq(struct device_node *node)
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{
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struct device_node *np;
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const unsigned int *p_ips_freq = NULL;
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of_node_get(node);
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while (node) {
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p_ips_freq = of_get_property(node, "bus-frequency", NULL);
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if (p_ips_freq)
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break;
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np = of_get_parent(node);
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of_node_put(node);
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node = np;
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}
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if (node)
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of_node_put(node);
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return p_ips_freq ? *p_ips_freq : 0;
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}
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EXPORT_SYMBOL(mpc512x_find_ips_freq);
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void __init mpc512x_init_IRQ(void)
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{
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struct device_node *np;
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@ -47,36 +47,6 @@ static DEFINE_SPINLOCK(mpc52xx_lock);
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static struct mpc52xx_gpt __iomem *mpc52xx_wdt;
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static struct mpc52xx_cdm __iomem *mpc52xx_cdm;
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/**
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* mpc52xx_find_ipb_freq - Find the IPB bus frequency for a device
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* @node: device node
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*
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* Returns IPB bus frequency, or 0 if the bus frequency cannot be found.
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*/
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unsigned int
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mpc52xx_find_ipb_freq(struct device_node *node)
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{
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struct device_node *np;
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const unsigned int *p_ipb_freq = NULL;
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of_node_get(node);
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while (node) {
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p_ipb_freq = of_get_property(node, "bus-frequency", NULL);
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if (p_ipb_freq)
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break;
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np = of_get_parent(node);
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of_node_put(node);
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node = np;
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}
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if (node)
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of_node_put(node);
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return p_ipb_freq ? *p_ipb_freq : 0;
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}
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EXPORT_SYMBOL(mpc52xx_find_ipb_freq);
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/*
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* Configure the XLB arbiter settings to match what Linux expects.
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*/
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@ -221,7 +191,7 @@ unsigned int mpc52xx_get_xtal_freq(struct device_node *node)
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if (!mpc52xx_cdm)
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return 0;
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freq = mpc52xx_find_ipb_freq(node);
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freq = mpc5xxx_get_bus_frequency(node);
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if (!freq)
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return 0;
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@ -50,6 +50,9 @@ obj-$(CONFIG_PPC_DCR) += dcr.o
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obj-$(CONFIG_8xx) += mpc8xx_pic.o cpm1.o
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obj-$(CONFIG_UCODE_PATCH) += micropatch.o
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obj-$(CONFIG_PPC_MPC512x) += mpc5xxx_clocks.o
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obj-$(CONFIG_PPC_MPC52xx) += mpc5xxx_clocks.o
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ifeq ($(CONFIG_SUSPEND),y)
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obj-$(CONFIG_6xx) += 6xx-suspend.o
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endif
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@ -0,0 +1,33 @@
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/**
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* mpc5xxx_get_bus_frequency - Find the bus frequency for a device
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* @node: device node
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*
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* Returns bus frequency (IPS on MPC512x, IPB on MPC52xx),
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* or 0 if the bus frequency cannot be found.
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*/
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#include <linux/kernel.h>
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#include <linux/of_platform.h>
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unsigned int
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mpc5xxx_get_bus_frequency(struct device_node *node)
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{
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struct device_node *np;
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const unsigned int *p_bus_freq = NULL;
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of_node_get(node);
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while (node) {
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p_bus_freq = of_get_property(node, "bus-frequency", NULL);
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if (p_bus_freq)
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break;
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np = of_get_parent(node);
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of_node_put(node);
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node = np;
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}
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if (node)
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of_node_put(node);
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return p_bus_freq ? *p_bus_freq : 0;
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}
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EXPORT_SYMBOL(mpc5xxx_get_bus_frequency);
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@ -694,7 +694,7 @@ mpc52xx_ata_probe(struct of_device *op, const struct of_device_id *match)
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struct bcom_task *dmatsk = NULL;
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/* Get ipb frequency */
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ipb_freq = mpc52xx_find_ipb_freq(op->node);
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ipb_freq = mpc5xxx_get_bus_frequency(op->node);
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if (!ipb_freq) {
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dev_err(&op->dev, "could not determine IPB bus frequency\n");
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return -ENODEV;
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@ -197,7 +197,7 @@ int mpc_i2c_get_fdr_52xx(struct device_node *node, u32 clock, int prescaler)
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return -EINVAL;
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/* Determine divider value */
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divider = mpc52xx_find_ipb_freq(node) / clock;
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divider = mpc5xxx_get_bus_frequency(node) / clock;
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/*
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* We want to choose an FDR/DFSR that generates an I2C bus speed that
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@ -1006,7 +1006,7 @@ mpc52xx_fec_probe(struct of_device *op, const struct of_device_id *match)
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priv->phy_addr = FEC5200_PHYADDR_NONE;
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priv->speed = 100;
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priv->duplex = DUPLEX_HALF;
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priv->phy_speed = ((mpc52xx_find_ipb_freq(op->node) >> 20) / 5) << 1;
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priv->phy_speed = ((mpc5xxx_get_bus_frequency(op->node) >> 20) / 5) << 1;
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/* the 7-wire property means don't use MII mode */
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if (of_find_property(op->node, "fsl,7-wire-mode", NULL))
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/* set MII speed */
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out_be32(&priv->regs->mii_speed,
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((mpc52xx_find_ipb_freq(of->node) >> 20) / 5) << 1);
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((mpc5xxx_get_bus_frequency(of->node) >> 20) / 5) << 1);
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err = mdiobus_register(bus);
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if (err)
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@ -76,7 +76,6 @@
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#include <linux/of_platform.h>
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#include <asm/mpc52xx.h>
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#include <asm/mpc512x.h>
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#include <asm/mpc52xx_psc.h>
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#if defined(CONFIG_SERIAL_MPC52xx_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
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@ -254,7 +253,7 @@ static unsigned long mpc52xx_getuartclk(void *p)
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* but the generic serial code assumes 16
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* so return ipb freq / 2
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*/
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return mpc52xx_find_ipb_freq(p) / 2;
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return mpc5xxx_get_bus_frequency(p) / 2;
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}
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static struct psc_ops mpc52xx_psc_ops = {
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static unsigned long mpc512x_getuartclk(void *p)
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{
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return mpc512x_find_ips_freq(p);
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return mpc5xxx_get_bus_frequency(p);
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}
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static struct psc_ops mpc512x_psc_ops = {
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@ -188,7 +188,7 @@ static int mpc5200_wdt_probe(struct of_device *op,
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if (!wdt)
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return -ENOMEM;
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wdt->ipb_freq = mpc52xx_find_ipb_freq(op->node);
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wdt->ipb_freq = mpc5xxx_get_bus_frequency(op->node);
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err = of_address_to_resource(op->node, 0, &wdt->mem);
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if (err)
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