kernel: copy kernel 4.19 code to 5.4

No changes were done to the patches while coping them. Currently they do
not apply on top of kernel 5.4.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>

1 files changed, 115 insertions, 0 deletions

diff --git a/target/linux/generic/backport-5.4/725-v5.5-net-sfp-parse-SFP-power-requirement-earlier.patch b/target/linux/generic/backport-5.4/725-v5.5-net-sfp-parse-SFP-power-requirement-earlier.patch
new file mode 100644
index 0000000000..0b358f86d2
--- /dev/null
+++ b/target/linux/generic/backport-5.4/725-v5.5-net-sfp-parse-SFP-power-requirement-earlier.patch
@@ -0,0 +1,115 @@
+From d4b8746219e8c0361e5ed6e440ab3a8a600d1f76 Mon Sep 17 00:00:00 2001
+From: Russell King <rmk+kernel@armlinux.org.uk>
+Date: Fri, 11 Oct 2019 17:24:40 +0100
+Subject: [PATCH 623/660] net: sfp: parse SFP power requirement earlier
+
+Parse the SFP power requirement earlier, in preparation for moving the
+power level setup code.
+
+Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
+---
+ drivers/net/phy/sfp.c | 42 +++++++++++++++++++++++++++++-------------
+ 1 file changed, 29 insertions(+), 13 deletions(-)
+
+--- a/drivers/net/phy/sfp.c
++++ b/drivers/net/phy/sfp.c
+@@ -196,6 +196,8 @@ struct sfp {
+ 	unsigned int sm_retries;
+ 
+ 	struct sfp_eeprom_id id;
++	unsigned int module_power_mW;
++
+ #if IS_ENABLED(CONFIG_HWMON)
+ 	struct sfp_diag diag;
+ 	struct device *hwmon_dev;
+@@ -1309,17 +1311,14 @@ static void sfp_sm_mod_init(struct sfp *
+ 		sfp_sm_probe_phy(sfp);
+ }
+ 
+-static int sfp_sm_mod_hpower(struct sfp *sfp)
++static int sfp_module_parse_power(struct sfp *sfp)
+ {
+-	u32 power;
+-	u8 val;
+-	int err;
++	u32 power_mW = 1000;
+ 
+-	power = 1000;
+ 	if (sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_POWER_DECL))
+-		power = 1500;
++		power_mW = 1500;
+ 	if (sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_HIGH_POWER_LEVEL))
+-		power = 2000;
++		power_mW = 2000;
+ 
+ 	if (sfp->id.ext.sff8472_compliance == SFP_SFF8472_COMPLIANCE_NONE &&
+ 	    (sfp->id.ext.diagmon & (SFP_DIAGMON_DDM | SFP_DIAGMON_ADDRMODE)) !=
+@@ -1328,23 +1327,33 @@ static int sfp_sm_mod_hpower(struct sfp
+ 		 * or requires an address change sequence, so assume that
+ 		 * the module powers up in the indicated power mode.
+ 		 */
+-		if (power > sfp->max_power_mW) {
++		if (power_mW > sfp->max_power_mW) {
+ 			dev_err(sfp->dev,
+ 				"Host does not support %u.%uW modules\n",
+-				power / 1000, (power / 100) % 10);
++				power_mW / 1000, (power_mW / 100) % 10);
+ 			return -EINVAL;
+ 		}
+ 		return 0;
+ 	}
+ 
+-	if (power > sfp->max_power_mW) {
++	if (power_mW > sfp->max_power_mW) {
+ 		dev_warn(sfp->dev,
+ 			 "Host does not support %u.%uW modules, module left in power mode 1\n",
+-			 power / 1000, (power / 100) % 10);
++			 power_mW / 1000, (power_mW / 100) % 10);
+ 		return 0;
+ 	}
+ 
+-	if (power <= 1000)
++	sfp->module_power_mW = power_mW;
++
++	return 0;
++}
++
++static int sfp_sm_mod_hpower(struct sfp *sfp)
++{
++	u8 val;
++	int err;
++
++	if (sfp->module_power_mW <= 1000)
+ 		return 0;
+ 
+ 	err = sfp_read(sfp, true, SFP_EXT_STATUS, &val, sizeof(val));
+@@ -1364,7 +1373,8 @@ static int sfp_sm_mod_hpower(struct sfp
+ 	}
+ 
+ 	dev_info(sfp->dev, "Module switched to %u.%uW power level\n",
+-		 power / 1000, (power / 100) % 10);
++		 sfp->module_power_mW / 1000,
++		 (sfp->module_power_mW / 100) % 10);
+ 	return T_HPOWER_LEVEL;
+ 
+ err:
+@@ -1451,6 +1461,11 @@ static int sfp_sm_mod_probe(struct sfp *
+ 		dev_warn(sfp->dev,
+ 			 "module address swap to access page 0xA2 is not supported.\n");
+ 
++	/* Parse the module power requirement */
++	ret = sfp_module_parse_power(sfp);
++	if (ret < 0)
++		return ret;
++
+ 	ret = sfp_hwmon_insert(sfp);
+ 	if (ret < 0)
+ 		return ret;
+@@ -1474,6 +1489,7 @@ static void sfp_sm_mod_remove(struct sfp
+ 	sfp_module_tx_disable(sfp);
+ 
+ 	memset(&sfp->id, 0, sizeof(sfp->id));
++	sfp->module_power_mW = 0;
+ 
+ 	dev_info(sfp->dev, "module removed\n");
+ }