aboutsummaryrefslogtreecommitdiffstats
path: root/target/linux/lantiq/patches-4.14/0025-MIPS-lantiq-gphy-Remove-reboot-remove-reset-asserts.patch
diff options
context:
space:
mode:
Diffstat (limited to 'target/linux/lantiq/patches-4.14/0025-MIPS-lantiq-gphy-Remove-reboot-remove-reset-asserts.patch')
-rw-r--r--target/linux/lantiq/patches-4.14/0025-MIPS-lantiq-gphy-Remove-reboot-remove-reset-asserts.patch86
1 files changed, 86 insertions, 0 deletions
diff --git a/target/linux/lantiq/patches-4.14/0025-MIPS-lantiq-gphy-Remove-reboot-remove-reset-asserts.patch b/target/linux/lantiq/patches-4.14/0025-MIPS-lantiq-gphy-Remove-reboot-remove-reset-asserts.patch
new file mode 100644
index 0000000000..6efa6f13d9
--- /dev/null
+++ b/target/linux/lantiq/patches-4.14/0025-MIPS-lantiq-gphy-Remove-reboot-remove-reset-asserts.patch
@@ -0,0 +1,86 @@
+From ae14aba7fc748b2da282b59a2f516a311ed1f6eb Mon Sep 17 00:00:00 2001
+From: Mathias Kresin <dev@kresin.me>
+Date: Tue, 27 Mar 2018 23:15:07 +0200
+Subject: [PATCH] MIPS: lantiq: gphy: Remove reboot/remove reset asserts
+
+While doing a global software reset, these bits are not cleared and let
+some bootloader fail to initialise the GPHYs. The bootloader don't expect
+these bits to be set, as they aren't during power on.
+
+The asserts were a workaround for a wrong syscon-reboot mask. With a mask
+set which includes the GPHY resets of the first reset register, the
+resets of the second reset register arn't required any more.
+
+Signed-off-by: Mathias Kresin <dev@kresin.me>
+---
+ drivers/soc/lantiq/gphy.c | 34 ----------------------------------
+ 1 file changed, 34 deletions(-)
+
+--- a/drivers/soc/lantiq/gphy.c
++++ b/drivers/soc/lantiq/gphy.c
+@@ -30,7 +30,6 @@ struct xway_gphy_priv {
+ struct clk *gphy_clk_gate;
+ struct reset_control *gphy_reset;
+ struct reset_control *gphy_reset2;
+- struct notifier_block gphy_reboot_nb;
+ void __iomem *membase;
+ char *fw_name;
+ };
+@@ -65,24 +64,6 @@ static const struct of_device_id xway_gp
+ };
+ MODULE_DEVICE_TABLE(of, xway_gphy_match);
+
+-static struct xway_gphy_priv *to_xway_gphy_priv(struct notifier_block *nb)
+-{
+- return container_of(nb, struct xway_gphy_priv, gphy_reboot_nb);
+-}
+-
+-static int xway_gphy_reboot_notify(struct notifier_block *reboot_nb,
+- unsigned long code, void *unused)
+-{
+- struct xway_gphy_priv *priv = to_xway_gphy_priv(reboot_nb);
+-
+- if (priv) {
+- reset_control_assert(priv->gphy_reset);
+- reset_control_assert(priv->gphy_reset2);
+- }
+-
+- return NOTIFY_DONE;
+-}
+-
+ static int xway_gphy_load(struct device *dev, struct xway_gphy_priv *priv,
+ dma_addr_t *dev_addr)
+ {
+@@ -216,14 +197,6 @@ static int xway_gphy_probe(struct platfo
+ reset_control_deassert(priv->gphy_reset);
+ reset_control_deassert(priv->gphy_reset2);
+
+- /* assert the gphy reset because it can hang after a reboot: */
+- priv->gphy_reboot_nb.notifier_call = xway_gphy_reboot_notify;
+- priv->gphy_reboot_nb.priority = -1;
+-
+- ret = register_reboot_notifier(&priv->gphy_reboot_nb);
+- if (ret)
+- dev_warn(dev, "Failed to register reboot notifier\n");
+-
+ platform_set_drvdata(pdev, priv);
+
+ return ret;
+@@ -235,17 +208,10 @@ static int xway_gphy_remove(struct platf
+ struct xway_gphy_priv *priv = platform_get_drvdata(pdev);
+ int ret;
+
+- reset_control_assert(priv->gphy_reset);
+- reset_control_assert(priv->gphy_reset2);
+-
+ iowrite32be(0, priv->membase);
+
+ clk_disable_unprepare(priv->gphy_clk_gate);
+
+- ret = unregister_reboot_notifier(&priv->gphy_reboot_nb);
+- if (ret)
+- dev_warn(dev, "Failed to unregister reboot notifier\n");
+-
+ return 0;
+ }
+