+++ /dev/null
-From 90964ab2d00546a59086ffd08964da3d2a5cefc9 Mon Sep 17 00:00:00 2001
-From: Eric Anholt <eric@anholt.net>
-Date: Wed, 12 Dec 2018 15:51:47 -0800
-Subject: [PATCH] bcm2835-pm: Move bcm2835-watchdog's DT probe to an
- MFD.
-
-The PM block that the wdt driver was binding to actually has multiple
-features we want to expose (power domains, reset, watchdog). Move the
-DT attachment to a MFD driver and make WDT probe against MFD.
-
-Signed-off-by: Eric Anholt <eric@anholt.net>
-Reviewed-by: Guenter Roeck <linux@roeck-us.net>
-Acked-by: Stefan Wahren <stefan.wahren@i2se.com>
-Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
-(cherry picked from commit 5e6acc3e678ed3db746ab4fb53a980861cd711b6)
----
- drivers/mfd/Makefile | 1 +
- drivers/mfd/bcm2835-pm.c | 64 ++++++++++++++++++++++++++++++++++
- drivers/watchdog/bcm2835_wdt.c | 26 +++++---------
- include/linux/mfd/bcm2835-pm.h | 13 +++++++
- 4 files changed, 87 insertions(+), 17 deletions(-)
- create mode 100644 drivers/mfd/bcm2835-pm.c
- create mode 100644 include/linux/mfd/bcm2835-pm.h
-
---- a/drivers/mfd/Makefile
-+++ b/drivers/mfd/Makefile
-@@ -10,6 +10,7 @@ obj-$(CONFIG_MFD_88PM805) += 88pm805.o 8
- obj-$(CONFIG_MFD_ACT8945A) += act8945a.o
- obj-$(CONFIG_MFD_SM501) += sm501.o
- obj-$(CONFIG_MFD_ASIC3) += asic3.o tmio_core.o
-+obj-$(CONFIG_ARCH_BCM2835) += bcm2835-pm.o
- obj-$(CONFIG_MFD_BCM590XX) += bcm590xx.o
- obj-$(CONFIG_MFD_BD9571MWV) += bd9571mwv.o
- cros_ec_core-objs := cros_ec.o
---- /dev/null
-+++ b/drivers/mfd/bcm2835-pm.c
-@@ -0,0 +1,64 @@
-+// SPDX-License-Identifier: GPL-2.0+
-+/*
-+ * PM MFD driver for Broadcom BCM2835
-+ *
-+ * This driver binds to the PM block and creates the MFD device for
-+ * the WDT driver.
-+ */
-+
-+#include <linux/delay.h>
-+#include <linux/io.h>
-+#include <linux/mfd/bcm2835-pm.h>
-+#include <linux/mfd/core.h>
-+#include <linux/module.h>
-+#include <linux/of_address.h>
-+#include <linux/of_platform.h>
-+#include <linux/platform_device.h>
-+#include <linux/types.h>
-+#include <linux/watchdog.h>
-+
-+static const struct mfd_cell bcm2835_pm_devs[] = {
-+ { .name = "bcm2835-wdt" },
-+};
-+
-+static int bcm2835_pm_probe(struct platform_device *pdev)
-+{
-+ struct resource *res;
-+ struct device *dev = &pdev->dev;
-+ struct bcm2835_pm *pm;
-+
-+ pm = devm_kzalloc(dev, sizeof(*pm), GFP_KERNEL);
-+ if (!pm)
-+ return -ENOMEM;
-+ platform_set_drvdata(pdev, pm);
-+
-+ pm->dev = dev;
-+
-+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-+ pm->base = devm_ioremap_resource(dev, res);
-+ if (IS_ERR(pm->base))
-+ return PTR_ERR(pm->base);
-+
-+ return devm_mfd_add_devices(dev, -1,
-+ bcm2835_pm_devs, ARRAY_SIZE(bcm2835_pm_devs),
-+ NULL, 0, NULL);
-+}
-+
-+static const struct of_device_id bcm2835_pm_of_match[] = {
-+ { .compatible = "brcm,bcm2835-pm-wdt", },
-+ {},
-+};
-+MODULE_DEVICE_TABLE(of, bcm2835_pm_of_match);
-+
-+static struct platform_driver bcm2835_pm_driver = {
-+ .probe = bcm2835_pm_probe,
-+ .driver = {
-+ .name = "bcm2835-pm",
-+ .of_match_table = bcm2835_pm_of_match,
-+ },
-+};
-+module_platform_driver(bcm2835_pm_driver);
-+
-+MODULE_AUTHOR("Eric Anholt <eric@anholt.net>");
-+MODULE_DESCRIPTION("Driver for Broadcom BCM2835 PM MFD");
-+MODULE_LICENSE("GPL");
---- a/drivers/watchdog/bcm2835_wdt.c
-+++ b/drivers/watchdog/bcm2835_wdt.c
-@@ -12,6 +12,7 @@
-
- #include <linux/delay.h>
- #include <linux/types.h>
-+#include <linux/mfd/bcm2835-pm.h>
- #include <linux/module.h>
- #include <linux/io.h>
- #include <linux/watchdog.h>
-@@ -41,6 +42,8 @@ struct bcm2835_wdt {
- spinlock_t lock;
- };
-
-+static struct bcm2835_wdt *bcm2835_power_off_wdt;
-+
- static unsigned int heartbeat;
- static bool nowayout = WATCHDOG_NOWAYOUT;
-
-@@ -163,10 +166,7 @@ static struct watchdog_device bcm2835_wd
- */
- static void bcm2835_power_off(void)
- {
-- struct device_node *np =
-- of_find_compatible_node(NULL, NULL, "brcm,bcm2835-pm-wdt");
-- struct platform_device *pdev = of_find_device_by_node(np);
-- struct bcm2835_wdt *wdt = platform_get_drvdata(pdev);
-+ struct bcm2835_wdt *wdt = bcm2835_power_off_wdt;
-
- /* Partition 63 tells the firmware that this is a halt */
- __bcm2835_restart(wdt, 63);
-@@ -174,7 +174,7 @@ static void bcm2835_power_off(void)
-
- static int bcm2835_wdt_probe(struct platform_device *pdev)
- {
-- struct resource *res;
-+ struct bcm2835_pm *pm = dev_get_drvdata(pdev->dev.parent);
- struct device *dev = &pdev->dev;
- struct bcm2835_wdt *wdt;
- int err;
-@@ -186,10 +186,7 @@ static int bcm2835_wdt_probe(struct plat
-
- spin_lock_init(&wdt->lock);
-
-- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-- wdt->base = devm_ioremap_resource(dev, res);
-- if (IS_ERR(wdt->base))
-- return PTR_ERR(wdt->base);
-+ wdt->base = pm->base;
-
- watchdog_set_drvdata(&bcm2835_wdt_wdd, wdt);
- watchdog_init_timeout(&bcm2835_wdt_wdd, heartbeat, dev);
-@@ -216,8 +213,10 @@ static int bcm2835_wdt_probe(struct plat
- return err;
- }
-
-- if (pm_power_off == NULL)
-+ if (pm_power_off == NULL) {
- pm_power_off = bcm2835_power_off;
-+ bcm2835_power_off_wdt = wdt;
-+ }
-
- dev_info(dev, "Broadcom BCM2835 watchdog timer");
- return 0;
-@@ -231,18 +230,11 @@ static int bcm2835_wdt_remove(struct pla
- return 0;
- }
-
--static const struct of_device_id bcm2835_wdt_of_match[] = {
-- { .compatible = "brcm,bcm2835-pm-wdt", },
-- {},
--};
--MODULE_DEVICE_TABLE(of, bcm2835_wdt_of_match);
--
- static struct platform_driver bcm2835_wdt_driver = {
- .probe = bcm2835_wdt_probe,
- .remove = bcm2835_wdt_remove,
- .driver = {
- .name = "bcm2835-wdt",
-- .of_match_table = bcm2835_wdt_of_match,
- },
- };
- module_platform_driver(bcm2835_wdt_driver);
---- /dev/null
-+++ b/include/linux/mfd/bcm2835-pm.h
-@@ -0,0 +1,13 @@
-+/* SPDX-License-Identifier: GPL-2.0+ */
-+
-+#ifndef BCM2835_MFD_PM_H
-+#define BCM2835_MFD_PM_H
-+
-+#include <linux/regmap.h>
-+
-+struct bcm2835_pm {
-+ struct device *dev;
-+ void __iomem *base;
-+};
-+
-+#endif /* BCM2835_MFD_PM_H */
projects / openwrt / staging / chunkeey.git / blobdiff