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authorSang-Heon Jeon <ekffu200098@gmail.com>2026-08-24 01:18:14 +0900
committerJulia Lawall <Julia.Lawall@inria.fr>2026-08-23 22:12:11 +0200
commit2bd30b8dc75b823dd7bbef9d7bc68e1fd7ecee5c (patch)
treedcc4da1d99f17541c5590ac63c77da4bf372a4ab /drivers/rtc/rtc-88pm886.c
downloadlinux-stable-2bd30b8dc75b823dd7bbef9d7bc68e1fd7ecee5c.tar.gz
linux-stable-2bd30b8dc75b823dd7bbef9d7bc68e1fd7ecee5c.zip
coccinelle: alloc_cast: drop removed allocatorsgrafted
- pci_alloc_consistent() and pci_zalloc_consistent() were removed by commit 7968778914e5 ("PCI: Remove the deprecated "pci-dma-compat.h" API") - kmem_alloc() was removed by commit f078d4ea8276 ("xfs: convert kmem_alloc() to kmalloc()") - kmem_zalloc() was removed by commit 10634530f7ba ("xfs: convert kmem_zalloc() to kzalloc()") - kmem_zone_alloc() and kmem_zone_zalloc() were removed by commit bae633a4a283 ("xfs: remove xfs_zone_{alloc,zalloc} helpers") So drop them from the rules. No functional change. Signed-off-by: Sang-Heon Jeon <ekffu200098@gmail.com> Signed-off-by: Julia Lawall <Julia.Lawall@inria.fr>
Diffstat (limited to 'drivers/rtc/rtc-88pm886.c')
-rw-r--r--drivers/rtc/rtc-88pm886.c96
1 files changed, 96 insertions, 0 deletions
diff --git a/drivers/rtc/rtc-88pm886.c b/drivers/rtc/rtc-88pm886.c
new file mode 100644
index 000000000..71443ae1b
--- /dev/null
+++ b/drivers/rtc/rtc-88pm886.c
@@ -0,0 +1,96 @@
+// SPDX-License-Identifier: GPL-2.0-only
+#include <linux/limits.h>
+#include <linux/platform_device.h>
+#include <linux/rtc.h>
+
+#include <linux/mfd/88pm886.h>
+
+/*
+ * Time is calculated as the sum of a 32-bit read-only advancing counter and a
+ * writeable constant offset stored in the chip's spare registers.
+ */
+
+static int pm886_rtc_read_time(struct device *dev, struct rtc_time *tm)
+{
+ struct regmap *regmap = dev_get_drvdata(dev);
+ u32 time;
+ u32 buf;
+ int ret;
+
+ ret = regmap_bulk_read(regmap, PM886_REG_RTC_SPARE1, &buf, 4);
+ if (ret)
+ return ret;
+ time = buf;
+
+ ret = regmap_bulk_read(regmap, PM886_REG_RTC_CNT1, &buf, 4);
+ if (ret)
+ return ret;
+ time += buf;
+
+ rtc_time64_to_tm(time, tm);
+
+ return 0;
+}
+
+static int pm886_rtc_set_time(struct device *dev, struct rtc_time *tm)
+{
+ struct regmap *regmap = dev_get_drvdata(dev);
+ u32 buf;
+ int ret;
+
+ ret = regmap_bulk_read(regmap, PM886_REG_RTC_CNT1, &buf, 4);
+ if (ret)
+ return ret;
+
+ buf = rtc_tm_to_time64(tm) - buf;
+
+ return regmap_bulk_write(regmap, PM886_REG_RTC_SPARE1, &buf, 4);
+}
+
+static const struct rtc_class_ops pm886_rtc_ops = {
+ .read_time = pm886_rtc_read_time,
+ .set_time = pm886_rtc_set_time,
+};
+
+static int pm886_rtc_probe(struct platform_device *pdev)
+{
+ struct pm886_chip *chip = dev_get_drvdata(pdev->dev.parent);
+ struct device *dev = &pdev->dev;
+ struct rtc_device *rtc;
+ int ret;
+
+ platform_set_drvdata(pdev, chip->regmap);
+
+ rtc = devm_rtc_allocate_device(dev);
+ if (IS_ERR(rtc))
+ return dev_err_probe(dev, PTR_ERR(rtc),
+ "Failed to allocate RTC device\n");
+
+ rtc->ops = &pm886_rtc_ops;
+ rtc->range_max = U32_MAX;
+
+ ret = devm_rtc_register_device(rtc);
+ if (ret)
+ return dev_err_probe(dev, ret, "Failed to register RTC device\n");
+
+ return 0;
+}
+
+static const struct platform_device_id pm886_rtc_id_table[] = {
+ { .name = "88pm886-rtc" },
+ { }
+};
+MODULE_DEVICE_TABLE(platform, pm886_rtc_id_table);
+
+static struct platform_driver pm886_rtc_driver = {
+ .driver = {
+ .name = "88pm886-rtc",
+ },
+ .probe = pm886_rtc_probe,
+ .id_table = pm886_rtc_id_table,
+};
+module_platform_driver(pm886_rtc_driver);
+
+MODULE_DESCRIPTION("Marvell 88PM886 RTC driver");
+MODULE_AUTHOR("Karel Balej <balejk@matfyz.cz>");
+MODULE_LICENSE("GPL");