Hi Geert,
Thank you for the patch.
On Monday, 6 August 2018 17:07:54 EEST Geert Uytterhoeven wrote:
> This reverts commit dfc80387aefb78161f83732804c6d01c89c24595.
>
> Deriving the proper regshift value from the register block size is
> fragile, as it may have been rounded up.
>
> Furthermore we will need plat_sci_port.regshift again.
Won't this break bisection ? Shouldn't you squash patches 3 and 4 together ?
Does this mechanism break anything on non-DT platforms ? If not I'd rather
keep it for them, and only use compat strings for DT platforms, to avoiding
adding back a platform data field.
> Signed-off-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
> ---
> arch/sh/kernel/cpu/sh3/setup-sh770x.c | 1 +
> arch/sh/kernel/cpu/sh4/setup-sh7750.c | 3 ++-
> arch/sh/kernel/cpu/sh4/setup-sh7760.c | 10 ++--------
> drivers/tty/serial/sh-sci.c | 8 +-------
> include/linux/serial_sci.h | 1 +
> 5 files changed, 7 insertions(+), 16 deletions(-)
>
> diff --git a/arch/sh/kernel/cpu/sh3/setup-sh770x.c
> b/arch/sh/kernel/cpu/sh3/setup-sh770x.c index
> 59a88611df55ac8f..592cd9ab30c4272f 100644
> --- a/arch/sh/kernel/cpu/sh3/setup-sh770x.c
> +++ b/arch/sh/kernel/cpu/sh3/setup-sh770x.c
> @@ -111,6 +111,7 @@ static struct platform_device rtc_device = {
> static struct plat_sci_port scif0_platform_data = {
> .type = PORT_SCI,
> .ops = &sh770x_sci_port_ops,
> + .regshift = 1,
> };
>
> static struct resource scif0_resources[] = {
> diff --git a/arch/sh/kernel/cpu/sh4/setup-sh7750.c
> b/arch/sh/kernel/cpu/sh4/setup-sh7750.c index
> 57d30689204d03b9..d98a55416306baef 100644
> --- a/arch/sh/kernel/cpu/sh4/setup-sh7750.c
> +++ b/arch/sh/kernel/cpu/sh4/setup-sh7750.c
> @@ -39,10 +39,11 @@ static struct platform_device rtc_device = {
>
> static struct plat_sci_port sci_platform_data = {
> .type = PORT_SCI,
> + .regshift = 2,
> };
>
> static struct resource sci_resources[] = {
> - DEFINE_RES_MEM(0xffe00000, 0x20),
> + DEFINE_RES_MEM(0xffe00000, 0x100),
> DEFINE_RES_IRQ(evt2irq(0x4e0)),
> };
>
> diff --git a/arch/sh/kernel/cpu/sh4/setup-sh7760.c
> b/arch/sh/kernel/cpu/sh4/setup-sh7760.c index
> e51fe1734e1368e8..0c0cdfc69dcc3e33 100644
> --- a/arch/sh/kernel/cpu/sh4/setup-sh7760.c
> +++ b/arch/sh/kernel/cpu/sh4/setup-sh7760.c
> @@ -200,18 +200,12 @@ static struct platform_device scif2_device = {
> };
>
> static struct plat_sci_port scif3_platform_data = {
> - /*
> - * This is actually a SIM card module serial port, based on an SCI with
> - * additional registers. The sh-sci driver doesn't support the SIM port
> - * type, declare it as a SCI. Don't declare the additional registers in
> - * the memory resource or the driver will compute an incorrect regshift
> - * value.
> - */
> .type = PORT_SCI,
> + .regshift = 2,
> };
>
> static struct resource scif3_resources[] = {
> - DEFINE_RES_MEM(0xfe480000, 0x10),
> + DEFINE_RES_MEM(0xfe480000, 0x100),
> DEFINE_RES_IRQ(evt2irq(0xc00)),
> DEFINE_RES_IRQ(evt2irq(0xc20)),
> DEFINE_RES_IRQ(evt2irq(0xc40)),
> diff --git a/drivers/tty/serial/sh-sci.c b/drivers/tty/serial/sh-sci.c
> index caf4422d9e2e59e4..955c057dff6e8c78 100644
> --- a/drivers/tty/serial/sh-sci.c
> +++ b/drivers/tty/serial/sh-sci.c
> @@ -2895,15 +2895,9 @@ static int sci_init_single(struct platform_device
> *dev,
>
> port->type = p->type;
> port->flags = UPF_FIXED_PORT | UPF_BOOT_AUTOCONF | p->flags;
> + port->regshift = p->regshift;
> port->fifosize = sci_port->params->fifosize;
>
> - if (port->type == PORT_SCI) {
> - if (sci_port->reg_size >= 0x20)
> - port->regshift = 2;
> - else
> - port->regshift = 1;
> - }
> -
> if (regtype == SCIx_SH4_SCIF_REGTYPE)
> if (sci_port->reg_size >= 0x20)
> port->regshift = 1;
> diff --git a/include/linux/serial_sci.h b/include/linux/serial_sci.h
> index c0e795d95477daea..eebb12fc473f49a2 100644
> --- a/include/linux/serial_sci.h
> +++ b/include/linux/serial_sci.h
> @@ -57,6 +57,7 @@ struct plat_sci_port {
> /*
> * Platform overrides if necessary, defaults otherwise.
> */
> + unsigned char regshift;
> unsigned char regtype;
>
> struct plat_sci_port_ops *ops;
--
Regards,
Laurent Pinchart
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