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MIPS: ath25: add UART support

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Signed-off-by: Sergey Ryazanov <ryazanov.s.a@gmail.com>
Cc: Linux MIPS <linux-mips@linux-mips.org>
Patchwork: https://patchwork.linux-mips.org/patch/8242/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Sergey Ryazanov 2014-10-29 03:18:43 +04:00 committed by Ralf Baechle
parent 8aaa7278c0
commit 1ac91b1f68
6 changed files with 53 additions and 0 deletions
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8
arch/mips/ath25/ar2315.c
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@ -267,3 +267,11 @@ void __init ar2315_plat_mem_setup(void)
_machine_restart = ar2315_restart;
}
void __init ar2315_arch_init(void)
{
unsigned irq = irq_create_mapping(ar2315_misc_irq_domain,
AR2315_MISC_IRQ_UART0);
ath25_serial_setup(AR2315_UART0_BASE, irq, ar2315_apb_frequency());
}

2
arch/mips/ath25/ar2315.h
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@ -6,12 +6,14 @@
void ar2315_arch_init_irq(void);
void ar2315_plat_time_init(void);
void ar2315_plat_mem_setup(void);
void ar2315_arch_init(void);
#else
static inline void ar2315_arch_init_irq(void) {}
static inline void ar2315_plat_time_init(void) {}
static inline void ar2315_plat_mem_setup(void) {}
static inline void ar2315_arch_init(void) {}
#endif

8
arch/mips/ath25/ar5312.c
View File

@ -265,3 +265,11 @@ void __init ar5312_plat_mem_setup(void)
_machine_restart = ar5312_restart;
}
void __init ar5312_arch_init(void)
{
unsigned irq = irq_create_mapping(ar5312_misc_irq_domain,
AR5312_MISC_IRQ_UART0);
ath25_serial_setup(AR5312_UART0_BASE, irq, ar5312_sys_frequency());
}

2
arch/mips/ath25/ar5312.h
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@ -6,12 +6,14 @@
void ar5312_arch_init_irq(void);
void ar5312_plat_time_init(void);
void ar5312_plat_mem_setup(void);
void ar5312_arch_init(void);
#else
static inline void ar5312_arch_init_irq(void) {}
static inline void ar5312_plat_time_init(void) {}
static inline void ar5312_plat_mem_setup(void) {}
static inline void ar5312_arch_init(void) {}
#endif

31
arch/mips/ath25/devices.c
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@ -1,10 +1,41 @@
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/serial_8250.h>
#include <asm/bootinfo.h>
#include "devices.h"
#include "ar5312.h"
#include "ar2315.h"
const char *get_system_type(void)
{
return "Atheros (unknown)";
}
void __init ath25_serial_setup(u32 mapbase, int irq, unsigned int uartclk)
{
struct uart_port s;
memset(&s, 0, sizeof(s));
s.flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST | UPF_IOREMAP;
s.iotype = UPIO_MEM32;
s.irq = irq;
s.regshift = 2;
s.mapbase = mapbase;
s.uartclk = uartclk;
early_serial_setup(&s);
}
static int __init ath25_arch_init(void)
{
if (is_ar5312())
ar5312_arch_init();
else
ar2315_arch_init();
return 0;
}
arch_initcall(ath25_arch_init);

2
arch/mips/ath25/devices.h
View File

@ -9,6 +9,8 @@
extern void (*ath25_irq_dispatch)(void);
void ath25_serial_setup(u32 mapbase, int irq, unsigned int uartclk);
static inline bool is_ar2315(void)
{
return (current_cpu_data.cputype == CPU_4KEC);