[U-Boot] [U-Boot,11/45] rtc: Allow use of RTC in SPL and TPL

[Heinrich Schuchardt]

On 10/01/2018 08:22 PM, Simon Glass wrote:
> Add Kconfig options so that the RTC can be used in SPL and TPL. This is
> helpful for accessing the contents of CMOS RAM, for example.
> 
> Signed-off-by: Simon Glass <sjg at chromium.org>
> Signed-off-by: Simon Glass <sjg at chromium.org>
> ---

Hello Simon,

with this patch x86_64 does not boot anymore:
$ qemu-system-x86_64 -bios u-boot.rom -nographic --enable-kvm --cpu host
### ERROR ### Please RESET the board ###

I am currently testing Bin's patch series:
https://patchwork.ozlabs.org/project/uboot/list/?series=70127
[U-Boot,1/4] x86: Specify -march=core2 to build 64-bit U-Boot proper

> 
>  drivers/rtc/Kconfig      | 18 ++++++++++++++++++
>  drivers/rtc/Makefile     |  2 +-
>  drivers/rtc/rtc-uclass.c |  1 +
>  3 files changed, 20 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig
> index 97cf7d84dfa..bcc01b135e5 100644
> --- a/drivers/rtc/Kconfig
> +++ b/drivers/rtc/Kconfig
> @@ -13,6 +13,24 @@ config DM_RTC
>  	  drivers to perform the actual functions. See rtc.h for a
>  	  description of the API.
>  
> +config SPL_DM_RTC
> +	bool "Enable Driver Model for RTC drivers in SPL"
> +	depends on SPL_DM
> +	help
> +	  Enable drver model for real-time-clock drivers. The RTC uclass
> +	  then provides the rtc_get()/rtc_set() interface, delegating to
> +	  drivers to perform the actual functions. See rtc.h for a
> +	  description of the API.
> +
> +config TPL_DM_RTC
> +	bool "Enable Driver Model for RTC drivers in TPL"
> +	depends on TPL_DM
> +	help
> +	  Enable drver model for real-time-clock drivers. The RTC uclass
> +	  then provides the rtc_get()/rtc_set() interface, delegating to
> +	  drivers to perform the actual functions. See rtc.h for a
> +	  description of the API.
> +
>  config RTC_PCF2127
>  	bool "Enable PCF2127 driver"
>  	depends on DM_RTC
> diff --git a/drivers/rtc/Makefile b/drivers/rtc/Makefile
> index 513e3ffc079..1724602f1cb 100644
> --- a/drivers/rtc/Makefile
> +++ b/drivers/rtc/Makefile
> @@ -4,7 +4,7 @@
>  # Wolfgang Denk, DENX Software Engineering, wd at denx.de.
>  #ccflags-y += -DDEBUG
>  
> -obj-$(CONFIG_DM_RTC) += rtc-uclass.o
> +obj-$(CONFIG_$(SPL_TPL_)DM_RTC) += rtc-uclass.o

This is the line to be reverted.

Best regards

Heinrich

>  
>  obj-$(CONFIG_RTC_AT91SAM9_RTT) += at91sam9_rtt.o
>  obj-y += date.o
> diff --git a/drivers/rtc/rtc-uclass.c b/drivers/rtc/rtc-uclass.c
> index c676f0ff359..a0a238aedda 100644
> --- a/drivers/rtc/rtc-uclass.c
> +++ b/drivers/rtc/rtc-uclass.c
> @@ -122,4 +122,5 @@ int rtc_write32(struct udevice *dev, unsigned int reg, u32 value)
>  UCLASS_DRIVER(rtc) = {
>  	.name		= "rtc",
>  	.id		= UCLASS_RTC,
> +	.post_bind	= dm_scan_fdt_dev,
>  };
>