// SPDX-License-Identifier: GPL-2.0-only /* * Haoyu HYM8563 RTC driver * * Copyright (C) 2013 MundoReader S.L. * Author: Heiko Stuebner <[email protected]> * * based on rtc-HYM8563 * Copyright (C) 2010 ROCKCHIP, Inc. */ #include <linux/module.h> #include <linux/clk-provider.h> #include <linux/i2c.h> #include <linux/bcd.h> #include <linux/rtc.h> #define HYM8563_CTL1 … #define HYM8563_CTL1_TEST … #define HYM8563_CTL1_STOP … #define HYM8563_CTL1_TESTC … #define HYM8563_CTL2 … #define HYM8563_CTL2_TI_TP … #define HYM8563_CTL2_AF … #define HYM8563_CTL2_TF … #define HYM8563_CTL2_AIE … #define HYM8563_CTL2_TIE … #define HYM8563_SEC … #define HYM8563_SEC_VL … #define HYM8563_SEC_MASK … #define HYM8563_MIN … #define HYM8563_MIN_MASK … #define HYM8563_HOUR … #define HYM8563_HOUR_MASK … #define HYM8563_DAY … #define HYM8563_DAY_MASK … #define HYM8563_WEEKDAY … #define HYM8563_WEEKDAY_MASK … #define HYM8563_MONTH … #define HYM8563_MONTH_CENTURY … #define HYM8563_MONTH_MASK … #define HYM8563_YEAR … #define HYM8563_ALM_MIN … #define HYM8563_ALM_HOUR … #define HYM8563_ALM_DAY … #define HYM8563_ALM_WEEK … /* Each alarm check can be disabled by setting this bit in the register */ #define HYM8563_ALM_BIT_DISABLE … #define HYM8563_CLKOUT … #define HYM8563_CLKOUT_ENABLE … #define HYM8563_CLKOUT_32768 … #define HYM8563_CLKOUT_1024 … #define HYM8563_CLKOUT_32 … #define HYM8563_CLKOUT_1 … #define HYM8563_CLKOUT_MASK … #define HYM8563_TMR_CTL … #define HYM8563_TMR_CTL_ENABLE … #define HYM8563_TMR_CTL_4096 … #define HYM8563_TMR_CTL_64 … #define HYM8563_TMR_CTL_1 … #define HYM8563_TMR_CTL_1_60 … #define HYM8563_TMR_CTL_MASK … #define HYM8563_TMR_CNT … struct hym8563 { … }; /* * RTC handling */ static int hym8563_rtc_read_time(struct device *dev, struct rtc_time *tm) { … } static int hym8563_rtc_set_time(struct device *dev, struct rtc_time *tm) { … } static int hym8563_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled) { struct i2c_client *client = to_i2c_client(dev); int data; data = i2c_smbus_read_byte_data(client, HYM8563_CTL2); if (data < 0) return data; if (enabled) data |= HYM8563_CTL2_AIE; else data &= ~HYM8563_CTL2_AIE; return i2c_smbus_write_byte_data(client, HYM8563_CTL2, data); }; static int hym8563_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alm) { … } static int hym8563_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alm) { … } static const struct rtc_class_ops hym8563_rtc_ops = …; /* * Handling of the clkout */ #ifdef CONFIG_COMMON_CLK #define clkout_hw_to_hym8563(_hw) … static int clkout_rates[] = …; static unsigned long hym8563_clkout_recalc_rate(struct clk_hw *hw, unsigned long parent_rate) { … } static long hym8563_clkout_round_rate(struct clk_hw *hw, unsigned long rate, unsigned long *prate) { … } static int hym8563_clkout_set_rate(struct clk_hw *hw, unsigned long rate, unsigned long parent_rate) { … } static int hym8563_clkout_control(struct clk_hw *hw, bool enable) { … } static int hym8563_clkout_prepare(struct clk_hw *hw) { … } static void hym8563_clkout_unprepare(struct clk_hw *hw) { … } static int hym8563_clkout_is_prepared(struct clk_hw *hw) { … } static const struct clk_ops hym8563_clkout_ops = …; static struct clk *hym8563_clkout_register_clk(struct hym8563 *hym8563) { … } #endif /* * The alarm interrupt is implemented as a level-low interrupt in the * hym8563, while the timer interrupt uses a falling edge. * We don't use the timer at all, so the interrupt is requested to * use the level-low trigger. */ static irqreturn_t hym8563_irq(int irq, void *dev_id) { … } static int hym8563_init_device(struct i2c_client *client) { … } #ifdef CONFIG_PM_SLEEP static int hym8563_suspend(struct device *dev) { … } static int hym8563_resume(struct device *dev) { … } #endif static SIMPLE_DEV_PM_OPS(hym8563_pm_ops, hym8563_suspend, hym8563_resume); static int hym8563_probe(struct i2c_client *client) { … } static const struct i2c_device_id hym8563_id[] = …; MODULE_DEVICE_TABLE(i2c, hym8563_id); static const struct of_device_id hym8563_dt_idtable[] = …; MODULE_DEVICE_TABLE(of, hym8563_dt_idtable); static struct i2c_driver hym8563_driver = …; module_i2c_driver(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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