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Diffstat (limited to 'doc/driver-model/UDM-rtc.txt')
| -rw-r--r-- | doc/driver-model/UDM-rtc.txt | 253 |
1 files changed, 0 insertions, 253 deletions
diff --git a/doc/driver-model/UDM-rtc.txt b/doc/driver-model/UDM-rtc.txt deleted file mode 100644 index 3640d24..0000000 --- a/doc/driver-model/UDM-rtc.txt +++ /dev/null @@ -1,253 +0,0 @@ -============================= -RTC device subsystem analysis -============================= - -Tomas Hlavacek <tmshlvck@gmail.com> -2012-03-10 - -I) Overview ------------ - -U-Boot currently implements one common API for RTC devices. The interface -is defined in include/rtc.h and comprises of functions and structures: - - struct rtc_time { - int tm_sec; - int tm_min; - int tm_hour; - int tm_mday; - int tm_mon; - int tm_year; - int tm_wday; - int tm_yday; - int tm_isdst; - }; - - int rtc_get (struct rtc_time *); - int rtc_set (struct rtc_time *); - void rtc_reset (void); - -The functions are implemented by a proper device driver in drivers/rtc -directory and the driver to be compiled in is selected in a Makefile. -Drivers are mutually exclusive. - -Drivers depends on date code in drivers/rtc/date.c and naturally on board -specific data. - -II) Approach ------------- - - 1) New API - ---------- - In the UDM each rtc driver would register itself by a function - - int rtc_device_register(struct instance *i, - struct rtc_device_ops *o); - - The structure being defined as follows: - - struct rtc_device_ops { - int (*get_time)(struct instance *i, struct rtc_time *t); - int (*set_time)(struct instance *i, struct rtc_time *t); - int (*reset)(struct instance *i); - }; - - - 2) Conversion thougths - ---------------------- - U-Boot RTC drivers exports the same functions and therefore the conversion - of the drivers is straight-forward. There is no initialization needed. - - -III) Analysis of in-tree drivers --------------------------------- - - drivers/rtc/rv3029.c - -------------------- - The driver is standard rtc. Simple conversion is possible. - - - drivers/rtc/s3c24x0_rtc.c - ------------------------- - The driver is standard rtc. Simple conversion is possible. - - - drivers/rtc/pt7c4338.c - ---------------------- - The driver is standard rtc. Simple conversion is possible. - - - drivers/rtc/mvrtc.c - ------------------- - The driver is standard rtc. Simple conversion is possible. - - - drivers/rtc/ftrtc010.c - ---------------------- - The driver is standard rtc. Simple conversion is possible. - - - drivers/rtc/mpc5xxx.c - --------------------- - The driver is standard rtc. Simple conversion is possible. - - - drivers/rtc/ds164x.c - -------------------- - The driver is standard rtc. Simple conversion is possible. - - - drivers/rtc/rs5c372.c - --------------------- - The driver is standard rtc. Simple conversion is possible. - - - drivers/rtc/m41t94.c - -------------------- - The driver is standard rtc. Simple conversion is possible. - - - drivers/rtc/mc13xxx-rtc.c - ------------------------- - The driver is standard rtc. Simple conversion is possible. - - - drivers/rtc/mcfrtc.c - -------------------- - The driver is standard rtc. Simple conversion is possible. - - - drivers/rtc/davinci.c - --------------------- - The driver is standard rtc. Simple conversion is possible. - - - drivers/rtc/rx8025.c - -------------------- - The driver is standard rtc. Simple conversion is possible. - - - drivers/rtc/bfin_rtc.c - ---------------------- - The driver is standard rtc. Simple conversion is possible. - - - drivers/rtc/m41t62.c - -------------------- - The driver is standard rtc. Simple conversion is possible. - - - drivers/rtc/ds1306.c - -------------------- - The driver is standard rtc. Simple conversion is possible. - - - drivers/rtc/mpc8xx.c - -------------------- - The driver is standard rtc. Simple conversion is possible. - - - drivers/rtc/ds3231.c - -------------------- - The driver is standard rtc. Simple conversion is possible. - - - drivers/rtc/ds12887.c - --------------------- - The driver is standard rtc. Simple conversion is possible. - - - drivers/rtc/ds1302.c - -------------------- - The driver is standard rtc. Simple conversion is possible. - - - drivers/rtc/ds1374.c - -------------------- - The driver is standard rtc. Simple conversion is possible. - - - drivers/rtc/ds174x.c - -------------------- - The driver is standard rtc. Simple conversion is possible. - - - drivers/rtc/m41t60.c - -------------------- - The driver is standard rtc. Simple conversion is possible. - - - drivers/rtc/m48t35ax.c - ---------------------- - The driver is standard rtc. Simple conversion is possible. - - - drivers/rtc/pl031.c - ------------------- - The driver is standard rtc. Simple conversion is possible. - - - drivers/rtc/x1205.c - ------------------- - The driver is standard rtc. Simple conversion is possible. - - - drivers/rtc/m41t11.c - -------------------- - The driver is standard rtc. Simple conversion is possible. - - - drivers/rtc/pcf8563.c - --------------------- - The driver is standard rtc. Simple conversion is possible. - - - drivers/rtc/mk48t59.c - --------------------- - Macros needs cleanup. Besides that the driver is standard rtc. - Simple conversion is possible. - - - drivers/rtc/mxsrtc.c - -------------------- - The driver is standard rtc. Simple conversion is possible. - - - drivers/rtc/ds1307.c - -------------------- - The driver is standard rtc. Simple conversion is possible. - - - drivers/rtc/ds1556.c - -------------------- - The driver is standard rtc. Simple conversion is possible. - - - drivers/rtc/rtc4543.c - --------------------- - The driver is standard rtc. Simple conversion is possible. - - - drivers/rtc/ds1337.c - -------------------- - The driver is standard rtc. Simple conversion is possible. - - - drivers/rtc/isl1208.c - --------------------- - The driver is standard rtc. Simple conversion is possible. - - - drivers/rtc/max6900.c - --------------------- - The driver is standard rtc. Simple conversion is possible. - - - drivers/rtc/mc146818.c - ---------------------- - The driver is standard rtc. Simple conversion is possible. - - - drivers/rtc/at91sam9_rtt.c - -------------------------- - The driver is standard rtc. Simple conversion is possible. |