On Wed, Nov 06, 2024 at 02:01:13PM +0200, Claudiu wrote: > From: Claudiu Beznea <claudiu.beznea.uj@xxxxxxxxxxxxxx> > > The Renesas RZ/G3S supports a power saving mode where power to most of the > SoC components is turned off. When returning from this power saving mode, > SoC components need to be re-configured. > > The SCIFs on the Renesas RZ/G3S need to be re-configured as well when > returning from this power saving mode. The sh-sci code already configures > the SCIF clocks, power domain and registers by calling uart_resume_port() > in sci_resume(). On suspend path the SCIF UART ports are suspended > accordingly (by calling uart_suspend_port() in sci_suspend()). The only > missing setting is the reset signal. For this assert/de-assert the reset > signal on driver suspend/resume. > > In case the no_console_suspend is specified by the user, the registers need > to be saved on suspend path and restore on resume path. To do this the > sci_console_setup() function was added. There is no need to cache/restore > the status or FIFO registers. Only the control registers. To differentiate > b/w these, the struct sci_port_params::regs was updated with a new member > that specifies if the register needs to be chached on suspend. Only the > RZ_SCIFA instances were updated with this new support as the hardware for > the rest of variants was missing for testing. > > Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@xxxxxxxxxxxxxx> > --- > drivers/tty/serial/sh-sci.c | 53 ++++++++++++++++++++++++++++++------- > 1 file changed, 44 insertions(+), 9 deletions(-) Does not apply as I didn't take the atomic_t patch :( thanks, greg k-h
