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authorJohn Crispin <john@phrozen.org>2016-12-25 20:11:34 +0100
committerJohn Crispin <john@phrozen.org>2017-08-05 08:46:36 +0200
commit74d00a8c3849c1340efd713eb94b786e304c201f (patch)
treede481743de61c34da96ab5f9dba3af3edcfb8260 /target/linux/generic/pending-4.4/737-net-phy-at803x-Request-reset-GPIO-only-for-AT8030-PH.patch
parentde350550ef648d9728351b986b0516fa29465c45 (diff)
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kernel: split patches folder up into backport, pending and hack folders
* properly format/comment all patches * merge debloat patches * merge Kconfig patches * merge swconfig patches * merge hotplug patches * drop 200-fix_localversion.patch - upstream * drop 222-arm_zimage_none.patch - unused * drop 252-mv_cesa_depends.patch - no longer required * drop 410-mtd-move-forward-declaration-of-struct-mtd_info.patch - unused * drop 661-fq_codel_keep_dropped_stats.patch - outdated * drop 702-phy_add_aneg_done_function.patch - upstream * drop 840-rtc7301.patch - unused * drop 841-rtc_pt7c4338.patch - upstream * drop 921-use_preinit_as_init.patch - unused * drop spio-gpio-old and gpio-mmc - unused Signed-off-by: John Crispin <john@phrozen.org>
Diffstat (limited to 'target/linux/generic/pending-4.4/737-net-phy-at803x-Request-reset-GPIO-only-for-AT8030-PH.patch')
-rw-r--r--target/linux/generic/pending-4.4/737-net-phy-at803x-Request-reset-GPIO-only-for-AT8030-PH.patch42
1 files changed, 42 insertions, 0 deletions
diff --git a/target/linux/generic/pending-4.4/737-net-phy-at803x-Request-reset-GPIO-only-for-AT8030-PH.patch b/target/linux/generic/pending-4.4/737-net-phy-at803x-Request-reset-GPIO-only-for-AT8030-PH.patch
new file mode 100644
index 0000000000..b30ba7aaae
--- /dev/null
+++ b/target/linux/generic/pending-4.4/737-net-phy-at803x-Request-reset-GPIO-only-for-AT8030-PH.patch
@@ -0,0 +1,42 @@
+From: Sebastian Frias <sf84@laposte.net>
+Date: Wed, 23 Mar 2016 11:49:09 +0100
+Subject: [PATCH] net: phy: at803x: Request 'reset' GPIO only for AT8030 PHY
+
+This removes the dependency on GPIOLIB for non faulty PHYs.
+
+Indeed, without this patch, if GPIOLIB is not selected
+devm_gpiod_get_optional() will return -ENOSYS and the driver probe
+call will fail, regardless of the actual PHY hardware.
+
+Out of the 3 PHYs supported by this driver (AT8030, AT8031, AT8035),
+only AT8030 presents the issues that commit 13a56b449325 ("net: phy:
+at803x: Add support for hardware reset") attempts to work-around by
+using a 'reset' GPIO line.
+
+Hence, only AT8030 should depend on GPIOLIB operating properly.
+
+Fixes: 13a56b449325 ("net: phy: at803x: Add support for hardware reset")
+
+Signed-off-by: Sebastian Frias <sf84@laposte.net>
+Signed-off-by: David S. Miller <davem@davemloft.net>
+---
+
+--- a/drivers/net/phy/at803x.c
++++ b/drivers/net/phy/at803x.c
+@@ -250,12 +250,16 @@ static int at803x_probe(struct phy_devic
+ if (!priv)
+ return -ENOMEM;
+
++ if (phydev->drv->phy_id != ATH8030_PHY_ID)
++ goto does_not_require_reset_workaround;
++
+ gpiod_reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_LOW);
+ if (IS_ERR(gpiod_reset))
+ return PTR_ERR(gpiod_reset);
+
+ priv->gpiod_reset = gpiod_reset;
+
++does_not_require_reset_workaround:
+ phydev->priv = priv;
+
+ return 0;