// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright 2012 ( C ) , Jason Cooper < jason @ lakedaemon . net >
*
* arch / arm / mach - mvebu / kirkwood . c
*
* Flattened Device Tree board initialization
*/
#include <linux/clk.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/mbus.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/of_net.h>
#include <linux/of_platform.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <asm /hardware/cache-feroceon-l2.h>
#include <asm /mach/arch.h>
#include <asm /mach/map.h>
#include "kirkwood.h"
#include "kirkwood-pm.h"
#include "common.h"
static struct resource kirkwood_cpufreq_resources[] = {
[0 ] = {
.start = CPU_CONTROL_PHYS,
.end = CPU_CONTROL_PHYS + 3 ,
.flags = IORESOURCE_MEM,
},
};
static struct platform_device kirkwood_cpufreq_device = {
.name = "kirkwood-cpufreq" ,
.id = -1 ,
.num_resources = ARRAY_SIZE(kirkwood_cpufreq_resources),
.resource = kirkwood_cpufreq_resources,
};
static void __init kirkwood_cpufreq_init(void )
{
platform_device_register(&kirkwood_cpufreq_device);
}
static struct resource kirkwood_cpuidle_resource[] = {
{
.flags = IORESOURCE_MEM,
.start = DDR_OPERATION_BASE,
.end = DDR_OPERATION_BASE + 3 ,
},
};
static struct platform_device kirkwood_cpuidle = {
.name = "kirkwood_cpuidle" ,
.id = -1 ,
.resource = kirkwood_cpuidle_resource,
.num_resources = 1 ,
};
static void __init kirkwood_cpuidle_init(void )
{
platform_device_register(&kirkwood_cpuidle);
}
#define MV643XX_ETH_MAC_ADDR_LOW 0 x0414
#define MV643XX_ETH_MAC_ADDR_HIGH 0 x0418
static void __init kirkwood_dt_eth_fixup(void )
{
struct device_node *np;
/*
* The ethernet interfaces forget the MAC address assigned by u - boot
* if the clocks are turned off . Usually , u - boot on kirkwood boards
* has no DT support to properly set local - mac - address property .
* As a workaround , we get the MAC address from mv643xx_eth registers
* and update the port device node if no valid MAC address is set .
*/
for_each_compatible_node(np, NULL, "marvell,kirkwood-eth-port" ) {
struct device_node *pnp = of_get_parent(np);
struct clk *clk;
struct property *pmac;
u8 tmpmac[ETH_ALEN];
void __iomem *io;
u8 *macaddr;
u32 reg;
if (!pnp)
continue ;
/* skip disabled nodes or nodes with valid MAC address*/
if (!of_device_is_available(pnp) ||
!of_get_mac_address(np, tmpmac))
goto eth_fixup_skip;
clk = of_clk_get(pnp, 0 );
if (IS_ERR(clk))
goto eth_fixup_skip;
io = of_iomap(pnp, 0 );
if (!io)
goto eth_fixup_no_map;
/* ensure port clock is not gated to not hang CPU */
clk_prepare_enable(clk);
/* store MAC address register contents in local-mac-address */
pmac = kzalloc(sizeof (*pmac) + 6 , GFP_KERNEL);
if (!pmac)
goto eth_fixup_no_mem;
pmac->value = pmac + 1 ;
pmac->length = 6 ;
pmac->name = kstrdup("local-mac-address" , GFP_KERNEL);
if (!pmac->name) {
kfree(pmac);
goto eth_fixup_no_mem;
}
macaddr = pmac->value;
reg = readl(io + MV643XX_ETH_MAC_ADDR_HIGH);
macaddr[0 ] = (reg >> 24 ) & 0 xff;
macaddr[1 ] = (reg >> 16 ) & 0 xff;
macaddr[2 ] = (reg >> 8 ) & 0 xff;
macaddr[3 ] = reg & 0 xff;
reg = readl(io + MV643XX_ETH_MAC_ADDR_LOW);
macaddr[4 ] = (reg >> 8 ) & 0 xff;
macaddr[5 ] = reg & 0 xff;
of_update_property(np, pmac);
eth_fixup_no_mem:
iounmap(io);
clk_disable_unprepare(clk);
eth_fixup_no_map:
clk_put(clk);
eth_fixup_skip:
of_node_put(pnp);
}
}
/*
* Disable propagation of mbus errors to the CPU local bus , as this
* causes mbus errors ( which can occur for example for PCI aborts ) to
* throw CPU aborts , which we ' re not set up to deal with .
*/
static void kirkwood_disable_mbus_error_propagation(void )
{
void __iomem *cpu_config;
cpu_config = ioremap(CPU_CONFIG_PHYS, 4 );
writel(readl(cpu_config) & ~CPU_CONFIG_ERROR_PROP, cpu_config);
}
static struct of_dev_auxdata auxdata[] __initdata = {
OF_DEV_AUXDATA("marvell,kirkwood-audio" , 0 xf10a0000,
"mvebu-audio" , NULL),
{ /* sentinel */ }
};
static void __init kirkwood_dt_init(void )
{
kirkwood_disable_mbus_error_propagation();
BUG_ON(mvebu_mbus_dt_init(false ));
#ifdef CONFIG_CACHE_FEROCEON_L2
feroceon_of_init();
#endif
kirkwood_cpufreq_init();
kirkwood_cpuidle_init();
kirkwood_pm_init();
kirkwood_dt_eth_fixup();
of_platform_default_populate(NULL, auxdata, NULL);
}
static const char * const kirkwood_dt_board_compat[] __initconst = {
"marvell,kirkwood" ,
NULL
};
DT_MACHINE_START(KIRKWOOD_DT, "Marvell Kirkwood (Flattened Device Tree)" )
/* Maintainer: Jason Cooper <jason@lakedaemon.net> */
.init_machine = kirkwood_dt_init,
.restart = mvebu_restart,
.dt_compat = kirkwood_dt_board_compat,
MACHINE_END
Messung V0.5 in Prozent C=96 H=70 G=83
¤ Dauer der Verarbeitung: 0.10 Sekunden
(vorverarbeitet am 2026-09-29)
¤
*© Formatika GbR, Deutschland