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Commit 60219c56 authored by Yang Ling's avatar Yang Ling Committed by Ralf Baechle
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MIPS: Add RTC support for Loongson1C board 



The patch adds RTC support for Loongson1C board, and enable the external
crystal when the RTC is first powered up.

Signed-off-by: default avatarYang Ling <gnaygnil@gmail.com>
Cc: keguang.zhang@gmail.com
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/14214/


Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
parent 9f3b8081

arch/mips/include/asm/mach-loongson32/platform.h

+1 −0
Original line number Diff line number Diff line
@@ -30,5 +30,6 @@ void __init ls1x_clk_init(void); 
void __init ls1x_dma_set_platdata(struct plat_ls1x_dma *pdata);

void __init ls1x_nand_set_platdata(struct plat_ls1x_nand *pdata);

void __init ls1x_serial_set_uartclk(struct platform_device *pdev);

void __init ls1x_rtc_set_extclk(struct platform_device *pdev);



#endif /* __ASM_MACH_LOONGSON32_PLATFORM_H */

arch/mips/loongson32/common/platform.c

+13 −0
Original line number Diff line number Diff line
@@ -23,6 +23,10 @@ 
#include <dma.h>

#include <nand.h>



#define LS1X_RTC_CTRL	((void __iomem *)KSEG1ADDR(LS1X_RTC_BASE + 0x40))

#define RTC_EXTCLK_OK	(BIT(5) | BIT(8))

#define RTC_EXTCLK_EN	BIT(8)



/* 8250/16550 compatible UART */

#define LS1X_UART(_id)						\

	{							\
@@ -66,6 +70,15 @@ void __init ls1x_serial_set_uartclk(struct platform_device *pdev) 
		p->uartclk = clk_get_rate(clk);

}



void __init ls1x_rtc_set_extclk(struct platform_device *pdev)

{

	u32 val;



	val = __raw_readl(LS1X_RTC_CTRL);

	if (!(val & RTC_EXTCLK_OK))

		__raw_writel(val | RTC_EXTCLK_EN, LS1X_RTC_CTRL);

}



/* CPUFreq */

static struct plat_ls1x_cpufreq ls1x_cpufreq_pdata = {

	.clk_name	= "cpu_clk",

arch/mips/loongson32/ls1c/Makefile

+1 −1
Original line number Diff line number Diff line 
#

# Makefile for loongson1B based machines.

# Makefile for loongson1C based machines.

#



obj-y += board.o

arch/mips/loongson32/ls1c/board.c

+4 −5
Original line number Diff line number Diff line 
/*

 * Copyright (c) 2016 Ling Yang <gnaygnil@gmail.com>

 * Copyright (c) 2016 Yang Ling <gnaygnil@gmail.com>

 *

 * This program is free software; you can redistribute	it and/or modify it

 * under  the terms of	the GNU General	 Public License as published by the
@@ -12,17 +12,16 @@ 
static struct platform_device *ls1c_platform_devices[] __initdata = {

	&ls1x_uart_pdev,

	&ls1x_eth0_pdev,

	&ls1x_rtc_pdev,

};



static int __init ls1c_platform_init(void)

{

	int err;



	ls1x_serial_set_uartclk(&ls1x_uart_pdev);

	ls1x_rtc_set_extclk(&ls1x_rtc_pdev);



	err = platform_add_devices(ls1c_platform_devices,

	return platform_add_devices(ls1c_platform_devices,

				   ARRAY_SIZE(ls1c_platform_devices));

	return err;

}



arch_initcall(ls1c_platform_init);