From e8dd273d199f5bbe295a8e3d8b777c5505b6b2e1 Mon Sep 17 00:00:00 2001 From: Salah Triki Date: Thu, 17 Sep 2026 14:00:52 +0100 Subject: iio: proximity: isl29501: Fix return type of isl29501_register_write isl29501_register_write() was returning a u32 instead of an int. Since the function returns negative error codes (such as -ERANGE or return values from i2c_smbus_write_byte_data()), returning an unsigned integer type prevents callers from correctly checking for negative error conditions. Fix this by changing the function return type from u32 to int. This was found through manual code review. Fixes: 1c28799257bc ("iio: light: isl29501: Add support for the ISL29501 ToF sensor.") Signed-off-by: Salah Triki Reviewed-by: Joshua Crofts Cc: stable@vger.kernel.org Signed-off-by: Jonathan Cameron --- drivers/rtc/rtc-test.c | 201 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 201 insertions(+) create mode 100644 drivers/rtc/rtc-test.c (limited to 'drivers/rtc/rtc-test.c') diff --git a/drivers/rtc/rtc-test.c b/drivers/rtc/rtc-test.c new file mode 100644 index 000000000..94f995feb --- /dev/null +++ b/drivers/rtc/rtc-test.c @@ -0,0 +1,201 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * An RTC test device/driver + * Copyright (C) 2005 Tower Technologies + * Author: Alessandro Zummo + */ + +#include +#include +#include +#include + +#define MAX_RTC_TEST 3 + +struct rtc_test_data { + struct rtc_device *rtc; + time64_t offset; + struct timer_list alarm; + bool alarm_en; +}; + +static struct platform_device *pdev[MAX_RTC_TEST]; + +static int test_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm) +{ + struct rtc_test_data *rtd = dev_get_drvdata(dev); + time64_t alarm; + + alarm = (rtd->alarm.expires - jiffies) / HZ; + alarm += ktime_get_real_seconds() + rtd->offset; + + rtc_time64_to_tm(alarm, &alrm->time); + alrm->enabled = rtd->alarm_en; + + return 0; +} + +static int test_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm) +{ + struct rtc_test_data *rtd = dev_get_drvdata(dev); + ktime_t timeout; + u64 expires; + + timeout = rtc_tm_to_time64(&alrm->time) - ktime_get_real_seconds(); + timeout -= rtd->offset; + + timer_delete(&rtd->alarm); + + expires = jiffies + timeout * HZ; + if (expires > U32_MAX) + expires = U32_MAX; + + rtd->alarm.expires = expires; + + if (alrm->enabled) + add_timer(&rtd->alarm); + + rtd->alarm_en = alrm->enabled; + + return 0; +} + +static int test_rtc_read_time(struct device *dev, struct rtc_time *tm) +{ + struct rtc_test_data *rtd = dev_get_drvdata(dev); + + rtc_time64_to_tm(ktime_get_real_seconds() + rtd->offset, tm); + + return 0; +} + +static int test_rtc_set_time(struct device *dev, struct rtc_time *tm) +{ + struct rtc_test_data *rtd = dev_get_drvdata(dev); + + rtd->offset = rtc_tm_to_time64(tm) - ktime_get_real_seconds(); + + return 0; +} + +static int test_rtc_alarm_irq_enable(struct device *dev, unsigned int enable) +{ + struct rtc_test_data *rtd = dev_get_drvdata(dev); + + rtd->alarm_en = enable; + if (enable) + add_timer(&rtd->alarm); + else + timer_delete(&rtd->alarm); + + return 0; +} + +static const struct rtc_class_ops test_rtc_ops_noalm = { + .read_time = test_rtc_read_time, + .set_time = test_rtc_set_time, + .alarm_irq_enable = test_rtc_alarm_irq_enable, +}; + +static const struct rtc_class_ops test_rtc_ops = { + .read_time = test_rtc_read_time, + .set_time = test_rtc_set_time, + .read_alarm = test_rtc_read_alarm, + .set_alarm = test_rtc_set_alarm, + .alarm_irq_enable = test_rtc_alarm_irq_enable, +}; + +static void test_rtc_alarm_handler(struct timer_list *t) +{ + struct rtc_test_data *rtd = timer_container_of(rtd, t, alarm); + + rtc_update_irq(rtd->rtc, 1, RTC_AF | RTC_IRQF); +} + +static int test_probe(struct platform_device *plat_dev) +{ + struct rtc_test_data *rtd; + + rtd = devm_kzalloc(&plat_dev->dev, sizeof(*rtd), GFP_KERNEL); + if (!rtd) + return -ENOMEM; + + platform_set_drvdata(plat_dev, rtd); + + rtd->rtc = devm_rtc_allocate_device(&plat_dev->dev); + if (IS_ERR(rtd->rtc)) + return PTR_ERR(rtd->rtc); + + switch (plat_dev->id) { + case 0: + rtd->rtc->ops = &test_rtc_ops_noalm; + break; + default: + rtd->rtc->ops = &test_rtc_ops; + device_init_wakeup(&plat_dev->dev, true); + } + + timer_setup(&rtd->alarm, test_rtc_alarm_handler, 0); + rtd->alarm.expires = 0; + + return devm_rtc_register_device(rtd->rtc); +} + +static struct platform_driver test_driver = { + .probe = test_probe, + .driver = { + .name = "rtc-test", + }, +}; + +static int __init test_init(void) +{ + int i, err; + + err = platform_driver_register(&test_driver); + if (err) + return err; + + err = -ENOMEM; + for (i = 0; i < MAX_RTC_TEST; i++) { + pdev[i] = platform_device_alloc("rtc-test", i); + if (!pdev[i]) + goto exit_free_mem; + } + + for (i = 0; i < MAX_RTC_TEST; i++) { + err = platform_device_add(pdev[i]); + if (err) + goto exit_device_del; + } + + return 0; + +exit_device_del: + for (; i > 0; i--) + platform_device_del(pdev[i - 1]); + +exit_free_mem: + for (i = 0; i < MAX_RTC_TEST; i++) + platform_device_put(pdev[i]); + + platform_driver_unregister(&test_driver); + return err; +} + +static void __exit test_exit(void) +{ + int i; + + for (i = 0; i < MAX_RTC_TEST; i++) + platform_device_unregister(pdev[i]); + + platform_driver_unregister(&test_driver); +} + +MODULE_AUTHOR("Alessandro Zummo "); +MODULE_DESCRIPTION("RTC test driver/device"); +MODULE_LICENSE("GPL v2"); + +module_init(test_init); +module_exit(test_exit); -- cgit v1.3.1