[patch] Patch for gentoo-sources-5.5.5 to get Arduino working again

ch341.patch (text/plain), 492 bytes, created by Martin Zwicknagl on 2020-02-23 16:46:26 UTC

--- a/drivers/usb/serial/ch341.c	2020-01-27 01:23:03.000000000 +0100
+++ b/drivers/usb/serial/ch341.c	2020-02-23 17:03:49.782794134 +0100
@@ -205,6 +205,19 @@
 			16 * speed - 16 * CH341_CLKRATE / (clk_div * (div + 1)))
 		div++;
 
+/*
+	 * Prefer lower base clock (fact = 0) if even divisor.
+	 *
+	 * Note that this makes the receiver more tolerant to errors.
+	 */
+	if (fact == 1 && div % 2 == 0) {
+		div /= 2;
+		fact = 0;
+	}
+
+
+
+
 	return (0x100 - div) << 8 | fact << 2 | ps;
 }