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mips: ralink: mt7620: introduce 'soc_device' initialization

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MT7620 SoCs have their own 'ralink_soc_info' structure with some
information about the soc itself. In order to be able to retrieve this
information from driver code and avoid architecture dependencies for
retrieving these details introduce this 'soc_device'. Set 'data' pointer
points to the struct 'ralink_soc_info' to be able to export also current
soc information using this mechanism. We need to select 'SOC_BUS' in
Kconfig configuration for these SoCs.

Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
This commit is contained in:
Sergio Paracuellos 2023-02-27 11:58:06 +01:00 committed by Thomas Bogendoerfer
parent 727ea3c77d
commit 83552892b7
2 changed files with 45 additions and 0 deletions
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1
arch/mips/ralink/Kconfig
View file

@ -44,6 +44,7 @@ choice
bool "MT7620/8"
select CPU_MIPSR2_IRQ_VI
select HAVE_PCI
select SOC_BUS
config SOC_MT7621
bool "MT7621"

44
arch/mips/ralink/mt7620.c
View file

@ -11,6 +11,8 @@
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/bug.h>
#include <linux/slab.h>
#include <linux/sys_soc.h>
#include <asm/mipsregs.h>
#include <asm/mach-ralink/ralink_regs.h>
@ -49,6 +51,8 @@
/* does the board have sdram or ddram */
static int dram_type;
static struct ralink_soc_info *soc_info_ptr;
static __init u32
mt7620_calc_rate(u32 ref_rate, u32 mul, u32 div)
{
@ -410,6 +414,44 @@ static const char __init *mt7620_get_soc_name(struct ralink_soc_info *soc_info)
}
}
static const char __init *mt7620_get_soc_id_name(void)
{
if (ralink_soc == MT762X_SOC_MT7620A)
return "mt7620a";
else if (ralink_soc == MT762X_SOC_MT7620N)
return "mt7620n";
else if (ralink_soc == MT762X_SOC_MT7688)
return "mt7688";
else if (ralink_soc == MT762X_SOC_MT7628AN)
return "mt7628n";
else
return "invalid";
}
static int __init mt7620_soc_dev_init(void)
{
struct soc_device *soc_dev;
struct soc_device_attribute *soc_dev_attr;
soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
if (!soc_dev_attr)
return -ENOMEM;
soc_dev_attr->family = "Ralink";
soc_dev_attr->soc_id = mt7620_get_soc_id_name();
soc_dev_attr->data = soc_info_ptr;
soc_dev = soc_device_register(soc_dev_attr);
if (IS_ERR(soc_dev)) {
kfree(soc_dev_attr);
return PTR_ERR(soc_dev);
}
return 0;
}
device_initcall(mt7620_soc_dev_init);
void __init prom_soc_init(struct ralink_soc_info *soc_info)
{
const char *name = mt7620_get_soc_name(soc_info);
@ -444,4 +486,6 @@ void __init prom_soc_init(struct ralink_soc_info *soc_info)
(pmu0 & PMU_SW_SET) ? ("sw") : ("hw"));
pr_info("Digital PMU set to %s control\n",
(pmu1 & DIG_SW_SEL) ? ("sw") : ("hw"));
soc_info_ptr = soc_info;
}