From: Stefan Sørensen Date: Fri, 27 Jun 2014 10:05:29 +0000 (+0200) Subject: dp83640: Program pulsewidth2 values of perout triggers 0 and 1 X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=35e872ae6330e72c1b6045c021314b32a4a047de;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git dp83640: Program pulsewidth2 values of perout triggers 0 and 1 Periodic output triggers 0 and 1 of the dp83640 has a programmable duty-cycle which is controlled by the Pulsewidth2 field of the trigger data register. This field is not documented in the datasheet, but it is described in the "PHYTER Software Development Guide" section 3.1.4.1. Failing to set the field can result in unstable/no trigger output. Add programming of the Pulsewidth2 field, setting it to the same value as the Pulsewidth field for a 50% duty cycle. Signed-off-by: Stefan Sørensen Signed-off-by: David S. Miller --- diff --git a/drivers/net/phy/dp83640.c b/drivers/net/phy/dp83640.c index 6a999e6814a0..fcd50b77999f 100644 --- a/drivers/net/phy/dp83640.c +++ b/drivers/net/phy/dp83640.c @@ -353,6 +353,11 @@ static int periodic_output(struct dp83640_clock *clock, ext_write(0, phydev, PAGE4, PTP_TDR, sec >> 16); /* sec[31:16] */ ext_write(0, phydev, PAGE4, PTP_TDR, pwidth & 0xffff); /* ns[15:0] */ ext_write(0, phydev, PAGE4, PTP_TDR, pwidth >> 16); /* ns[31:16] */ + /* Triggers 0 and 1 has programmable pulsewidth2 */ + if (trigger < 2) { + ext_write(0, phydev, PAGE4, PTP_TDR, pwidth & 0xffff); + ext_write(0, phydev, PAGE4, PTP_TDR, pwidth >> 16); + } /*enable trigger*/ val &= ~TRIG_LOAD;