Messages in this thread Patch in this message | | | Subject | Re: [PATCH v7 9/9] arm64: dts: rockchip: Enable SFC for Odroid Go Advance | From | Jon Lin <> | Date | Fri, 11 Jun 2021 11:54:09 +0800 |
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On 6/11/21 11:38 AM, Chris Morgan wrote: > On Fri, Jun 11, 2021 at 10:26:35AM +0800, Jon Lin wrote: >> Hi Chris >> >> May you attach the XT25F128B device code to me, and I'll try to work it out. > Sure, here is the patch I am using: > > https://patchwork.ozlabs.org/project/linux-mtd/patch/SN6PR06MB5342C82F372F37FB8E21B327A57A9@SN6PR06MB5342.namprd06.prod.outlook.com/
this patch works well in my rk3308 tx-2 rx-2 XT25F128BSSIGU case.
# dd if=/tmp/rand.img of=/dev/mtdblock0 bs=4096 seek=1024 1024+0 records in 1024+0 records out # # dd if=/dev/mtd0 of=/tmp/rand1.img bs=4096 skip=1024 count=1024
1024+0 records in 1024+0 records out # # # md5sum /tmp/*.img 83e45a56766168b47e6db1d41b1b403d /tmp/rand.img 83e45a56766168b47e6db1d41b1b403d /tmp/rand1.img # # dmesg | grep XT25F128BSSIGU [ 0.200738] spi-nor spi3.0: XT25F128BSSIGU (16384 Kbytes) #
> >> On 6/11/21 1:36 AM, Chris Morgan wrote: >>> On Wed, Jun 09, 2021 at 10:13:48PM +0800, Jon Lin wrote: >>>> From: Chris Morgan <macromorgan@hotmail.com> >>>> >>>> This enables the Rockchip Serial Flash Controller for the Odroid Go >>>> Advance. Note that while the attached SPI NOR flash and the controller >>>> both support quad read mode, only 2 of the required 4 pins are present. >>>> The rx and tx bus width is set to 2 for this reason. >>>> >>>> Signed-off-by: Chris Morgan <macromorgan@hotmail.com> >>>> Signed-off-by: Jon Lin <jon.lin@rock-chips.com> >>>> --- >>>> >>>> Changes in v7: None >>>> Changes in v6: None >>>> Changes in v5: None >>>> Changes in v4: None >>>> Changes in v3: None >>>> Changes in v2: None >>>> Changes in v1: None >>>> >>>> .../boot/dts/rockchip/rk3326-odroid-go2.dts | 16 ++++++++++++++++ >>>> 1 file changed, 16 insertions(+) >>>> >>>> diff --git a/arch/arm64/boot/dts/rockchip/rk3326-odroid-go2.dts b/arch/arm64/boot/dts/rockchip/rk3326-odroid-go2.dts >>>> index 49c97f76df77..f78e11dd8447 100644 >>>> --- a/arch/arm64/boot/dts/rockchip/rk3326-odroid-go2.dts >>>> +++ b/arch/arm64/boot/dts/rockchip/rk3326-odroid-go2.dts >>>> @@ -484,6 +484,22 @@ >>>> status = "okay"; >>>> }; >>>> +&sfc { >>>> + pinctrl-0 = <&sfc_clk &sfc_cs0 &sfc_bus2>; >>>> + pinctrl-names = "default"; >>>> + #address-cells = <1>; >>>> + #size-cells = <0>; >>>> + status = "okay"; >>>> + >>>> + flash@0 { >>>> + compatible = "jedec,spi-nor"; >>>> + reg = <0>; >>>> + spi-max-frequency = <108000000>; >>>> + spi-rx-bus-width = <2>; >>>> + spi-tx-bus-width = <2>; >>> Note that I am still working with Jon Lin to research this, but it was >>> found in testing that if I set the tx bus width to 1 the problems I >>> encountered in earlier are resolved. At this time I do not know if it >>> is an issue with the driver for the flash controller, or if the NOR, or >>> board itself has some sort of errata which prevent dual tx from working >>> correctly. Note that as of right now the flash chip I am using (an >>> XTX XT25F128B) is not currently supported in mainline, so it's very >>> possible this is some sort of errata with the chip. It's also possible >>> that there is something with the board that is interferring with dual >>> mode TX. When Jon comes back that he has tested dual mode on the SFC >>> with a different board/chip I will recommend that we change the tx >>> bus width here to a 1, and then once the XT25F128B gets mainlined we >>> can see if someone else has issues with dual tx mode so we can note >>> that as a problem with the chip. Or maybe there is something weird >>> with dual tx mode yet on the SFC driver/controller, I don't know yet. >>> I'm all too happy to work with a Rockchip engineer so things like >>> this can be determined before we hit mainline. :-) >>> >>> The XTX25F128B driver is currently awaiting a decision on how to handle >>> continuation codes, as this chip ID should be using continuation codes, >>> but doesn't appear to return them when you query for manufacturer ID. >>> So I should also note in the commit here that the SFC will still be >>> unusable on the Odroid Go Advance until the XTX25F128B is also >>> mainlined. >>> >>> Thank you. >>> >>>> + }; >>>> +}; >>>> + >>>> &tsadc { >>>> status = "okay"; >>>> }; >>>> -- >>>> 2.17.1 >>>> >>>> >>>> >>> >> > >
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