net: ethernet: ti: am65-cpts: reset pps genf adj settings on enable

The CPTS PPS GENf adjustment settings are invalid after it has been
disabled for a while, so reset them.

Fixes: eb9233c ("net: ethernet: ti: am65-cpts: adjust pps following ptp changes")
Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Signed-off-by: Siddharth Vadapalli <s-vadapalli@ti.com>
Reviewed-by: Roger Quadros <rogerq@kernel.org>
Reviewed-by: Michal Swiatkowski <michal.swiatkowski@linux.intel.com>
Link: https://lore.kernel.org/r/20230316095232.2002680-1-s-vadapalli@ti.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Author: grygoriyS

drivers/net/ethernet/ti/am65-cpts.c

@@ -636,6 +636,10 @@ static void am65_cpts_perout_enable_hw(struct am65_cpts *cpts,
 		val = lower_32_bits(cycles);
 		am65_cpts_write32(cpts, val, genf[req->index].length);
 
+		am65_cpts_write32(cpts, 0, genf[req->index].control);
+		am65_cpts_write32(cpts, 0, genf[req->index].ppm_hi);
+		am65_cpts_write32(cpts, 0, genf[req->index].ppm_low);
+
 		cpts->genf_enable |= BIT(req->index);
 	} else {
 		am65_cpts_write32(cpts, 0, genf[req->index].length);