[PATCH] MIPS: Add RTC support for Loongson1C board

[Yang Ling]

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

Signed-off-by: Yang Ling 
---
 arch/mips/include/asm/mach-loongson32/platform.h |  1 +
 arch/mips/loongson32/common/platform.c   | 13 +
 arch/mips/loongson32/ls1c/Makefile   |  2 +-
 arch/mips/loongson32/ls1c/board.c|  9 -
 4 files changed, 19 insertions(+), 6 deletions(-)

diff --git a/arch/mips/include/asm/mach-loongson32/platform.h 
b/arch/mips/include/asm/mach-loongson32/platform.h
index 672531a..7adc313 100644
--- a/arch/mips/include/asm/mach-loongson32/platform.h
+++ b/arch/mips/include/asm/mach-loongson32/platform.h
@@ -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 */
diff --git a/arch/mips/loongson32/common/platform.c 
b/arch/mips/loongson32/common/platform.c
index 4d12e36..beff085 100644
--- a/arch/mips/loongson32/common/platform.c
+++ b/arch/mips/loongson32/common/platform.c
@@ -23,6 +23,10 @@
 #include 
 #include 
 
+#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",
diff --git a/arch/mips/loongson32/ls1c/Makefile 
b/arch/mips/loongson32/ls1c/Makefile
index 891eac4..a92c6cd 100644
--- a/arch/mips/loongson32/ls1c/Makefile
+++ b/arch/mips/loongson32/ls1c/Makefile
@@ -1,5 +1,5 @@
 #
-# Makefile for loongson1B based machines.
+# Makefile for loongson1C based machines.
 #
 
 obj-y += board.o
diff --git a/arch/mips/loongson32/ls1c/board.c 
b/arch/mips/loongson32/ls1c/board.c
index 3d69bd6..a96bed5 100644
--- a/arch/mips/loongson32/ls1c/board.c
+++ b/arch/mips/loongson32/ls1c/board.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2016 Ling Yang 
+ * Copyright (c) 2016 Yang Ling 
  *
  * 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 = {
_uart_pdev,
_eth0_pdev,
+   _rtc_pdev,
 };
 
 static int __init ls1c_platform_init(void)
 {
-   int err;
-
ls1x_serial_set_uartclk(_uart_pdev);
+   ls1x_rtc_set_extclk(_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);
-- 
1.9.1

[PATCH] MIPS: Add RTC support for Loongson1C board

[Yang Ling]

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

Signed-off-by: Yang Ling 
---
 arch/mips/include/asm/mach-loongson32/platform.h |  1 +
 arch/mips/loongson32/common/platform.c   | 13 +
 arch/mips/loongson32/ls1c/Makefile   |  2 +-
 arch/mips/loongson32/ls1c/board.c|  9 -
 4 files changed, 19 insertions(+), 6 deletions(-)

diff --git a/arch/mips/include/asm/mach-loongson32/platform.h 
b/arch/mips/include/asm/mach-loongson32/platform.h
index 672531a..7adc313 100644
--- a/arch/mips/include/asm/mach-loongson32/platform.h
+++ b/arch/mips/include/asm/mach-loongson32/platform.h
@@ -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 */
diff --git a/arch/mips/loongson32/common/platform.c 
b/arch/mips/loongson32/common/platform.c
index 4d12e36..beff085 100644
--- a/arch/mips/loongson32/common/platform.c
+++ b/arch/mips/loongson32/common/platform.c
@@ -23,6 +23,10 @@
 #include 
 #include 
 
+#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",
diff --git a/arch/mips/loongson32/ls1c/Makefile 
b/arch/mips/loongson32/ls1c/Makefile
index 891eac4..a92c6cd 100644
--- a/arch/mips/loongson32/ls1c/Makefile
+++ b/arch/mips/loongson32/ls1c/Makefile
@@ -1,5 +1,5 @@
 #
-# Makefile for loongson1B based machines.
+# Makefile for loongson1C based machines.
 #
 
 obj-y += board.o
diff --git a/arch/mips/loongson32/ls1c/board.c 
b/arch/mips/loongson32/ls1c/board.c
index 3d69bd6..a96bed5 100644
--- a/arch/mips/loongson32/ls1c/board.c
+++ b/arch/mips/loongson32/ls1c/board.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2016 Ling Yang 
+ * Copyright (c) 2016 Yang Ling 
  *
  * 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 = {
_uart_pdev,
_eth0_pdev,
+   _rtc_pdev,
 };
 
 static int __init ls1c_platform_init(void)
 {
-   int err;
-
ls1x_serial_set_uartclk(_uart_pdev);
+   ls1x_rtc_set_extclk(_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);
-- 
1.9.1