[PATCH v4 2/6] pinctrl: st: Enhance the controller to manage unavailable registers

[Lee Jones]

> From: Giuseppe Cavallaro <peppe.cavallaro at st.com>
> 
> This patch adds a new logic inside the st pinctrl to manage
> an unsupported scenario: some sysconfig are not available!
> 
> This is the case of STiH407 where, although documented, the
> following registers from SYSCFG_FLASH have been removed from the SoC.
> 
> SYSTEM_CONFIG3040
>    Output Enable pad control for all PIO Alternate Functions
> and
> SYSTEM_ CONFIG3050
>    Pull Up pad control for all PIO Alternate Functions
> 
> Without managing this condition an imprecise external abort
> will be detect.
> 
> To do this the patch also reviews the st_parse_syscfgs
> and other routines to manipulate the registers only if
> actually available.
> In any case, for example the st_parse_syscfgs detected
> an error condition but no action was made in the
> st_pctl_probe_dt.
> 
> Acked-by: Giuseppe Cavallaro <peppe.cavallaro at st.com>
> Acked-by: Srinivas Kandagatla <srinivas.kandagatla at st.com>
> Signed-off-by: Giuseppe Cavallaro <peppe.cavallaro at st.com>
> Signed-off-by: Maxime Coquelin <maxime.coquelin at st.com>
> ---
>  drivers/pinctrl/pinctrl-st.c | 104 +++++++++++++++++++++++++------------------
>  1 file changed, 61 insertions(+), 43 deletions(-)

Acked-by: Lee Jones <lee.jones at linaro.org>

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog