If we attempt to compile serial_sh.c for a system which lacks HSCIF support (e.g. R8A7740), we see the following compilation error:
In file included from drivers/serial/serial_sh.c:20: drivers/serial/serial_sh.c: In function ‘sh_serial_init_generic’: drivers/serial/serial_sh.h:429:35: warning: implicit declaration of function ‘sci_HSSRR_out’; did you mean ‘sci_SCSCR_out’? [-Wimplicit-function-declaration] 429 | #define sci_out(port, reg, value) sci_##reg##_out(port, value) | ^~~~ drivers/serial/serial_sh.c:62:17: note: in expansion of macro ‘sci_out’ 62 | sci_out(port, HSSRR, HSSRR_SRE | HSSRR_SRCYC8); | ^~~~~~~
To fix this, only try to support access to the HSSRR register for SoCs where it actually exists.
Support for the RZ/G2L will be introduced in following patches, which selects CONFIG_RCAR_64 but does not have HSCIF interfaces, so check for CONFIG_RCAR_GEN2 || CONFIG_RCAR_GEN3 || CONFIG_RCAR_GEN4 to determine if HSCIF is present.
Fixes: bbe36e29ca2c ('serial: sh: Add HSCIF support for R-Car SoC') Signed-off-by: Paul Barker paul.barker.ct@bp.renesas.com Reviewed-by: Biju Das biju.das.jz@bp.renesas.com Cc: Hai Pham hai.pham.ud@renesas.com Cc: Simon Glass sjg@chromium.org Reviewed-by: Marek Vasut marek.vasut+renesas@mailbox.org --- v1->v2: * Improve commit message. * Add Marek's Reivewed-by.
drivers/serial/serial_sh.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/drivers/serial/serial_sh.c b/drivers/serial/serial_sh.c index 20cda5dbe272..5e543dbf3d58 100644 --- a/drivers/serial/serial_sh.c +++ b/drivers/serial/serial_sh.c @@ -58,8 +58,10 @@ static void sh_serial_init_generic(struct uart_port *port) sci_out(port, SCSPTR, 0x0003); #endif
+#if IS_ENABLED(CONFIG_RCAR_GEN2) || IS_ENABLED(CONFIG_RCAR_GEN3) || IS_ENABLED(CONFIG_RCAR_GEN4) if (port->type == PORT_HSCIF) sci_out(port, HSSRR, HSSRR_SRE | HSSRR_SRCYC8); +#endif }
static void