Hi,
Currently, Freescale Gianfar PTP reference clock source is determined
through hard-coded value in gianfar_ptp driver. I don't think that
recompilation of the entire module (or even worse - the kernel) is a god
idea when we want to change one clock source to another. So, I want to
add new device tree binding, which can be used as:
ptp_clock@24E00 {
compatible = "fsl,etsec-ptp";
reg = <0x24E00 0xB0>;
interrupts = <12 0x8 13 0x8>;
interrupt-parent = < &ipic >;
fsl,cksel = <0>; /* <-- New entry */
fsl,tclk-period = <10>;
fsl,tmr-prsc = <100>;
fsl,tmr-add = <0x999999A4>;
fsl,tmr-fiper1 = <0x3B9AC9F6>;
fsl,tmr-fiper2 = <0x00018696>;
fsl,max-adj = <659999998>;
};
fsl,cksel acceptable values:
<0> for external clock;
<1> for eTSEC system clock;
<2> for eTSEC1 transmit clock;
<3> for RTC clock input.
I am new in this mailing list, and as far as I know, I have to discuss
all updates for device tree files here before sending patch, which uses
new attributes.
Also, should I define new bindings in some special way? I want to add
description of cksel attribute in
/Documentation/devicetree/bindings/net/fsl-tsec-phy.txt. Is it enough or
not?
Thanks!
--
Regards,
Aida
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