kernel: add backported phy/phylink/sfp patches

Backport the phy/phylink/sfp patches currently queued in netdev or in
mainline necessary to support GPON popular modules, specifically to
support Huawei and Nokia GPON modules.

Signed-off-by: Russell King <linux@armlinux.org.uk>
[jonas.gorski: include kernel version in file names, refresh patches]
Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>

1 files changed, 51 insertions, 0 deletions

diff --git a/target/linux/generic/backport-4.19/724-v5.5-net-sfp-rename-T_PROBE_WAIT-to-T_SERIAL.patch b/target/linux/generic/backport-4.19/724-v5.5-net-sfp-rename-T_PROBE_WAIT-to-T_SERIAL.patch
new file mode 100644
index 0000000000..e0c35feea3
--- /dev/null
+++ b/target/linux/generic/backport-4.19/724-v5.5-net-sfp-rename-T_PROBE_WAIT-to-T_SERIAL.patch
@@ -0,0 +1,51 @@
+From 615090acb3c0b41691f3a03522ea38350387c0e4 Mon Sep 17 00:00:00 2001
+From: Russell King <rmk+kernel@armlinux.org.uk>
+Date: Tue, 15 Oct 2019 10:54:15 +0100
+Subject: [PATCH 622/660] net: sfp: rename T_PROBE_WAIT to T_SERIAL
+
+SFF-8472 rev 12.2 defines the time for the serial bus to become ready
+using t_serial.  Use this as our identifier for this timeout to make
+it clear what we are referring to.
+
+Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
+---
+ drivers/net/phy/sfp.c | 13 ++++++-------
+ 1 file changed, 6 insertions(+), 7 deletions(-)
+
+--- a/drivers/net/phy/sfp.c
++++ b/drivers/net/phy/sfp.c
+@@ -147,11 +147,10 @@ static const enum gpiod_flags gpio_flags
+  * the same length on the PCB, which means it's possible for MOD DEF 0 to
+  * connect before the I2C bus on MOD DEF 1/2.
+  *
+- * The SFP MSA specifies 300ms as t_init (the time taken for TX_FAULT to
+- * be deasserted) but makes no mention of the earliest time before we can
+- * access the I2C EEPROM.  However, Avago modules require 300ms.
++ * The SFF-8472 specifies t_serial ("Time from power on until module is
++ * ready for data transmission over the two wire serial bus.") as 300ms.
+  */
+-#define T_PROBE_INIT	msecs_to_jiffies(300)
++#define T_SERIAL	msecs_to_jiffies(300)
+ #define T_HPOWER_LEVEL	msecs_to_jiffies(300)
+ #define T_PROBE_RETRY	msecs_to_jiffies(100)
+ 
+@@ -1495,8 +1494,8 @@ static void sfp_sm_device(struct sfp *sf
+ 	}
+ }
+ 
+-/* This state machine tracks the insert/remove state of
+- * the module, and handles probing the on-board EEPROM.
++/* This state machine tracks the insert/remove state of the module, probes
++ * the on-board EEPROM, and sets up the power level.
+  */
+ static void sfp_sm_module(struct sfp *sfp, unsigned int event)
+ {
+@@ -1512,7 +1511,7 @@ static void sfp_sm_module(struct sfp *sf
+ 	default:
+ 		if (event == SFP_E_INSERT && sfp->attached) {
+ 			sfp_module_tx_disable(sfp);
+-			sfp_sm_mod_next(sfp, SFP_MOD_PROBE, T_PROBE_INIT);
++			sfp_sm_mod_next(sfp, SFP_MOD_PROBE, T_SERIAL);
+ 		}
+ 		break;
+