• Antony Pavlov's avatar
    MIPS: dts: qca: ar9132_tl_wr1043nd_v1.dts: use "ref" for reference clock name · f7f797cf
    Antony Pavlov authored
    Current ath79 clock.c code does not read reference clock and
    pll setup from devicetree. The ar724x_clocks_init() function
    recreates the clocks from scratch so devicetree clock
    information is dropped. After adding the code which picked up
    reference clock from devicetree I have found
    that kernel does not boot anymore. The SPI and UART drivers
    can't get clk; here are the bootlog error messages:
    
        of_serial: probe of 18020000.uart failed with error -22
        ath79-spi: probe of 1f000000.spi failed with error -22
    
    The problem is that clock code assumes that reference clock
    name is "ref" but current dts-file uses another name: "oscillator".
    
    This patch fixes the problem by changing external oscillator
    dt node name to "ref".
    
    Please note that there is an alternative solution for the problem:
    
        > --- a/arch/mips/boot/dts/qca/ar9132_tl_wr1043nd_v1.dts
        > +++ b/arch/mips/boot/dts/qca/ar9132_tl_wr1043nd_v1.dts
        > @@ -16,6 +16,7 @@
        >
        >         extosc: oscillator {
        >                 compatible = "fixed-clock";
        > +               clock-output-names = "ref";
        >                 #clock-cells = <0>;
        >                 clock-frequency = <40000000>;
        >         };
    Signed-off-by: default avatarAntony Pavlov <antonynpavlov@gmail.com>
    Cc: Alban Bedel <albeu@free.fr>
    Cc: Michael Turquette <mturquette@baylibre.com>
    Cc: Rob Herring <robh+dt@kernel.org>
    Cc: linux-clk@vger.kernel.org
    Cc: linux-mips@linux-mips.org
    Cc: devicetree@vger.kernel.org
    Patchwork: https://patchwork.linux-mips.org/patch/12874/Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
    f7f797cf
ar9132_tl_wr1043nd_v1.dts 1.89 KB