aha yeah, it worked now i see both mtdblocks. Thanks a lot.
I think it did not work in my first trial, because i changed the
pinctrl-names something else than "default". Thanks a billion.
27 Ekim 2022 Perşembe tarihinde saat 08:59:56 UTC+2 itibarıyla
sam...@sholland.org şunları yazdı:
> Hi Mahmut,
>
> On 10/25/22 07:53, Mahmut Dikçizgi wrote:
> > I have noticed in sun8i-a23-a33.dtsi nand controller is only initialized
> > with CS0 & RB0 pins, so DTB needs to report the kernel which pins to
> > utilize to select chip1.
> >
> > sun8i-a23-a33.dtsi:
> > nfc: nand-controller@1c03000 {
> > .
> > pinctrl-0 = <&nand_pins *&nand_cs0_pin &nand_rb0_pin*>;
> > .
> > };
> > Knowing that /master/drivers/mtd/nand/raw/sunxi_nand.c only uses <reg>
> > index to Chip select, and <allwinner,rb> index to detect busy, how can i
> > tell kernel to use PC3 to CS1 & PC7 to RB1?
>
> Since you are using the hardware CS and RB functions (not bit-banging),
> those are the only possible choice of pins. All you need to do is select
> function number 2 for these pins in the pinctrl.
>
> > Since i am a DTS noob, i tried following in my board dts to override the
> > dts and miserably failed:
> >
> > pinctrl-names = "chip0pins", "chip1pins";
> > pinctrl-0 = <&nand_pins &nand_cs0_pin &nand_rb0_pin>;
> > pinctrl-1 = <&nand_pins &nand_cs1_pin &nand_rb1_pin>;
> > both chips not detected
> >
> > pinctrl-0 = <&nand_pins &nand_cs0_pin &nand_rb0_pin &nand_pins
> > &nand_cs1_pin &nand_rb1_pin>;
> > both chips not detected
>
> The "default" pinctrl name is actually important. Only the pinctrl-<n>
> entry with that name is applied during boot. So you need:
>
> pinctrl-names = "default";
> pinctrl-0 = <&nand_pins &nand_cs0_pin &nand_rb0_pin
> &nand_cs1_pin &nand_rb1_pin>;
>
> Where nand_cs1_pin and nand_rb1_pin reference PC3 and PC7 and the
> "nand0" function.
>
> Regards,
> Samuel
>
>
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