There are a number of Dallas 1307 based RTC HATs available for the RPi
that don't follow the HAT ID protocol but are simple, inexpensive and
widely available. Lets add an I2C driver and then allow the user to
enable them in the advanced menu. Once enabled and detected we then
dynamically swap them in to provide UEFI runtime RTC.
Its this latter bit of logic which seems to be unique to this platform
and probably should be closely reviewed.
Jeremy Linton (6):
Silicon/Bcm283x: Document the I2C registers
Silicon/Bcm283x: Add core I2C drivers
Platform/RasberryPi: Create I2C driver bound to RTC
Silicon/Maxim: Fix runtime issues
Platform/RasberryPi: Add I2C1 to uefi runtime memory map
Platform/RaspberryPi: Add menu and build options for HW RTC
.../Drivers/BcmI2CPlatform/BcmI2CPlatform.c | 127 +++++++
.../Drivers/BcmI2CPlatform/BcmI2CPlatform.inf | 54 +++
.../RaspberryPi/Drivers/ConfigDxe/ConfigDxe.c | 30 ++
.../Drivers/ConfigDxe/ConfigDxe.inf | 1 +
.../Drivers/ConfigDxe/ConfigDxeHii.uni | 6 +
.../Drivers/ConfigDxe/ConfigDxeHii.vfr | 16 +
Platform/RaspberryPi/Include/ConfigVars.h | 4 +
Platform/RaspberryPi/RPi3/RPi3.dsc | 7 +
Platform/RaspberryPi/RPi4/RPi4.dsc | 30 ++
Platform/RaspberryPi/RPi4/RPi4.fdf | 19 ++
Platform/RaspberryPi/RaspberryPi.dec | 2 +
.../Include/IndustryStandard/Bcm2836.h | 34 ++
.../Broadcom/Drivers/I2cDxe/ComponentName.c | 181 ++++++++++
.../Broadcom/Drivers/I2cDxe/DriverBinding.c | 237 ++++++++++++++
Silicon/Broadcom/Drivers/I2cDxe/I2cDxe.c | 309 ++++++++++++++++++
Silicon/Broadcom/Drivers/I2cDxe/I2cDxe.h | 55 ++++
Silicon/Broadcom/Drivers/I2cDxe/I2cDxe.inf | 56 ++++
.../Maxim/Library/Ds1307RtcLib/Ds1307RtcLib.c | 36 +-
.../Library/Ds1307RtcLib/Ds1307RtcLib.inf | 7 +-
19 files changed, 1208 insertions(+), 3 deletions(-)
create mode 100644 Platform/RaspberryPi/Drivers/BcmI2CPlatform/BcmI2CPlatform.c
create mode 100644 Platform/RaspberryPi/Drivers/BcmI2CPlatform/BcmI2CPlatform.inf
create mode 100644 Silicon/Broadcom/Drivers/I2cDxe/ComponentName.c
create mode 100644 Silicon/Broadcom/Drivers/I2cDxe/DriverBinding.c
create mode 100644 Silicon/Broadcom/Drivers/I2cDxe/I2cDxe.c
create mode 100644 Silicon/Broadcom/Drivers/I2cDxe/I2cDxe.h
create mode 100644 Silicon/Broadcom/Drivers/I2cDxe/I2cDxe.inf
--
2.43.0
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