This is actually required in order for a Linux kernel to boot successfully on a physical Malta board. Without enabling the RTC, a Malta Linux kernel will get stuck in its estimate_frequencies function on boot.
Signed-off-by: Paul Burton paul.burton@imgtec.com --- This is dependant upon my "MIPS Malta board support" series. The line numbers in include/configs/malta.h will only match up exactly following Gabor Juhos' "malta: define CONFIG_MEMSIZE_IN_BYTES" patch, but will apply with or without it.
With this I have verified that Linux boots successfully on a physical Malta with a coreFPGA6 core card & proAptiv bitstream. --- board/imgtec/malta/malta.c | 7 +++++++ drivers/rtc/mc146818.c | 2 +- include/configs/malta.h | 5 +++++ 3 files changed, 13 insertions(+), 1 deletion(-)
diff --git a/board/imgtec/malta/malta.c b/board/imgtec/malta/malta.c index d876507..a4ded67 100644 --- a/board/imgtec/malta/malta.c +++ b/board/imgtec/malta/malta.c @@ -147,6 +147,13 @@ int board_early_init_f(void) return 0; }
+int misc_init_r(void) +{ + rtc_reset(); + + return 0; +} + struct serial_device *default_serial_console(void) { switch (malta_sys_con()) { diff --git a/drivers/rtc/mc146818.c b/drivers/rtc/mc146818.c index 5f9d359..f7cf106 100644 --- a/drivers/rtc/mc146818.c +++ b/drivers/rtc/mc146818.c @@ -15,7 +15,7 @@ #include <command.h> #include <rtc.h>
-#ifdef __I386__ +#if defined(__I386__) || defined(CONFIG_MALTA) #include <asm/io.h> #define in8(p) inb(p) #define out8(p, v) outb(v, p) diff --git a/include/configs/malta.h b/include/configs/malta.h index a4370ae..492b63a 100644 --- a/include/configs/malta.h +++ b/include/configs/malta.h @@ -25,6 +25,10 @@ #define CONFIG_PCNET_79C973 #define PCNET_HAS_PROM
+#define CONFIG_MISC_INIT_R +#define CONFIG_RTC_MC146818 +#define CONFIG_SYS_ISA_IO_BASE_ADDRESS 0 + /* * CPU Configuration */ @@ -108,6 +112,7 @@ #undef CONFIG_CMD_LOADS #undef CONFIG_CMD_NFS
+#define CONFIG_CMD_DATE #define CONFIG_CMD_DHCP #define CONFIG_CMD_PCI #define CONFIG_CMD_PING