diff options
Diffstat (limited to 'target/linux/generic/backport-5.4/025-power-reset-add-driver-for-LinkStation-power-off.patch')
| -rw-r--r-- | target/linux/generic/backport-5.4/025-power-reset-add-driver-for-LinkStation-power-off.patch | 199 |
1 files changed, 0 insertions, 199 deletions
diff --git a/target/linux/generic/backport-5.4/025-power-reset-add-driver-for-LinkStation-power-off.patch b/target/linux/generic/backport-5.4/025-power-reset-add-driver-for-LinkStation-power-off.patch deleted file mode 100644 index 7bf48c3405..0000000000 --- a/target/linux/generic/backport-5.4/025-power-reset-add-driver-for-LinkStation-power-off.patch +++ /dev/null @@ -1,199 +0,0 @@ -From a7f79f99541eff4e6bcae0014eb08d3019337565 Mon Sep 17 00:00:00 2001 -From: =?UTF-8?q?Daniel=20Gonz=C3=A1lez=20Cabanelas?= <dgcbueu@gmail.com> -Date: Wed, 15 Jul 2020 15:35:14 +0200 -Subject: [PATCH] power: reset: add driver for LinkStation power off -MIME-Version: 1.0 -Content-Type: text/plain; charset=UTF-8 -Content-Transfer-Encoding: 8bit - -Some Buffalo LinkStations perform the power off operation, at restart -time, depending on the state of an output pin (LED2/INTn) at the ethernet -PHY. This pin is also used to wake the machine when a WoL packet is -received by the PHY. - -The driver is required by the Buffalo LinkStation LS421DE (ARM MVEBU), -and other models. Without it, the board remains forever halted if a -power off command is executed, unless the PSU is disconnected and -connected again. - -Add the driver to provide the power off function and also make the WoL -feature to be available. - -Signed-off-by: Daniel González Cabanelas <dgcbueu@gmail.com> -Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com> ---- - drivers/power/reset/Kconfig | 11 ++ - drivers/power/reset/Makefile | 1 + - drivers/power/reset/linkstation-poweroff.c | 136 +++++++++++++++++++++ - 3 files changed, 148 insertions(+) - create mode 100644 drivers/power/reset/linkstation-poweroff.c - ---- a/drivers/power/reset/Kconfig -+++ b/drivers/power/reset/Kconfig -@@ -99,6 +99,17 @@ config POWER_RESET_HISI - help - Reboot support for Hisilicon boards. - -+config POWER_RESET_LINKSTATION -+ tristate "Buffalo LinkStation power-off driver" -+ depends on ARCH_MVEBU || COMPILE_TEST -+ depends on OF_MDIO && PHYLIB -+ help -+ This driver supports turning off some Buffalo LinkStations by -+ setting an output pin at the ethernet PHY to the correct state. -+ It also makes the device compatible with the WoL function. -+ -+ Say Y here if you have a Buffalo LinkStation LS421D/E. -+ - config POWER_RESET_MSM - bool "Qualcomm MSM power-off driver" - depends on ARCH_QCOM ---- a/drivers/power/reset/Makefile -+++ b/drivers/power/reset/Makefile -@@ -10,6 +10,7 @@ obj-$(CONFIG_POWER_RESET_GEMINI_POWEROFF - obj-$(CONFIG_POWER_RESET_GPIO) += gpio-poweroff.o - obj-$(CONFIG_POWER_RESET_GPIO_RESTART) += gpio-restart.o - obj-$(CONFIG_POWER_RESET_HISI) += hisi-reboot.o -+obj-${CONFIG_POWER_RESET_LINKSTATION} += linkstation-poweroff.o - obj-$(CONFIG_POWER_RESET_MSM) += msm-poweroff.o - obj-$(CONFIG_POWER_RESET_QCOM_PON) += qcom-pon.o - obj-$(CONFIG_POWER_RESET_OCELOT_RESET) += ocelot-reset.o ---- /dev/null -+++ b/drivers/power/reset/linkstation-poweroff.c -@@ -0,0 +1,136 @@ -+// SPDX-License-Identifier: GPL-2.0 -+/* -+ * LinkStation power off restart driver -+ * Copyright (C) 2020 Daniel González Cabanelas <dgcbueu@gmail.com> -+ */ -+ -+#include <linux/module.h> -+#include <linux/notifier.h> -+#include <linux/of.h> -+#include <linux/of_mdio.h> -+#include <linux/of_platform.h> -+#include <linux/reboot.h> -+#include <linux/phy.h> -+ -+/* Defines from the eth phy Marvell driver */ -+#define MII_MARVELL_COPPER_PAGE 0 -+#define MII_MARVELL_LED_PAGE 3 -+#define MII_MARVELL_WOL_PAGE 17 -+#define MII_MARVELL_PHY_PAGE 22 -+ -+#define MII_PHY_LED_CTRL 16 -+#define MII_88E1318S_PHY_LED_TCR 18 -+#define MII_88E1318S_PHY_WOL_CTRL 16 -+#define MII_M1011_IEVENT 19 -+ -+#define MII_88E1318S_PHY_LED_TCR_INTn_ENABLE BIT(7) -+#define MII_88E1318S_PHY_LED_TCR_FORCE_INT BIT(15) -+#define MII_88E1318S_PHY_WOL_CTRL_CLEAR_WOL_STATUS BIT(12) -+#define LED2_FORCE_ON (0x8 << 8) -+#define LEDMASK GENMASK(11,8) -+ -+static struct phy_device *phydev; -+ -+static void mvphy_reg_intn(u16 data) -+{ -+ int rc = 0, saved_page; -+ -+ saved_page = phy_select_page(phydev, MII_MARVELL_LED_PAGE); -+ if (saved_page < 0) -+ goto err; -+ -+ /* Force manual LED2 control to let INTn work */ -+ __phy_modify(phydev, MII_PHY_LED_CTRL, LEDMASK, LED2_FORCE_ON); -+ -+ /* Set the LED[2]/INTn pin to the required state */ -+ __phy_modify(phydev, MII_88E1318S_PHY_LED_TCR, -+ MII_88E1318S_PHY_LED_TCR_FORCE_INT, -+ MII_88E1318S_PHY_LED_TCR_INTn_ENABLE | data); -+ -+ if (!data) { -+ /* Clear interrupts to ensure INTn won't be holded in high state */ -+ __phy_write(phydev, MII_MARVELL_PHY_PAGE, MII_MARVELL_COPPER_PAGE); -+ __phy_read(phydev, MII_M1011_IEVENT); -+ -+ /* If WOL was enabled and a magic packet was received before powering -+ * off, we won't be able to wake up by sending another magic packet. -+ * Clear WOL status. -+ */ -+ __phy_write(phydev, MII_MARVELL_PHY_PAGE, MII_MARVELL_WOL_PAGE); -+ __phy_set_bits(phydev, MII_88E1318S_PHY_WOL_CTRL, -+ MII_88E1318S_PHY_WOL_CTRL_CLEAR_WOL_STATUS); -+ } -+err: -+ rc = phy_restore_page(phydev, saved_page, rc); -+ if (rc < 0) -+ dev_err(&phydev->mdio.dev, "Write register failed, %d\n", rc); -+} -+ -+static int linkstation_reboot_notifier(struct notifier_block *nb, -+ unsigned long action, void *unused) -+{ -+ if (action == SYS_RESTART) -+ mvphy_reg_intn(MII_88E1318S_PHY_LED_TCR_FORCE_INT); -+ -+ return NOTIFY_DONE; -+} -+ -+static struct notifier_block linkstation_reboot_nb = { -+ .notifier_call = linkstation_reboot_notifier, -+}; -+ -+static void linkstation_poweroff(void) -+{ -+ unregister_reboot_notifier(&linkstation_reboot_nb); -+ mvphy_reg_intn(0); -+ -+ kernel_restart("Power off"); -+} -+ -+static const struct of_device_id ls_poweroff_of_match[] = { -+ { .compatible = "buffalo,ls421d" }, -+ { .compatible = "buffalo,ls421de" }, -+ { }, -+}; -+ -+static int __init linkstation_poweroff_init(void) -+{ -+ struct mii_bus *bus; -+ struct device_node *dn; -+ -+ dn = of_find_matching_node(NULL, ls_poweroff_of_match); -+ if (!dn) -+ return -ENODEV; -+ of_node_put(dn); -+ -+ dn = of_find_node_by_name(NULL, "mdio"); -+ if (!dn) -+ return -ENODEV; -+ -+ bus = of_mdio_find_bus(dn); -+ of_node_put(dn); -+ if (!bus) -+ return -EPROBE_DEFER; -+ -+ phydev = phy_find_first(bus); -+ if (!phydev) -+ return -EPROBE_DEFER; -+ -+ register_reboot_notifier(&linkstation_reboot_nb); -+ pm_power_off = linkstation_poweroff; -+ -+ return 0; -+} -+ -+static void __exit linkstation_poweroff_exit(void) -+{ -+ pm_power_off = NULL; -+ unregister_reboot_notifier(&linkstation_reboot_nb); -+} -+ -+module_init(linkstation_poweroff_init); -+module_exit(linkstation_poweroff_exit); -+ -+MODULE_AUTHOR("Daniel González Cabanelas <dgcbueu@gmail.com>"); -+MODULE_DESCRIPTION("LinkStation power off driver"); -+MODULE_LICENSE("GPL v2"); |