mirror of
https://github.com/BobTheBlinker/android_kernel_motorola_sm6375.git
synced 2026-10-28 02:32:09 -04:00
Merge branches 'ib-mfd-gpio-4.9', 'ib-mfd-gpio-regulator-4.9', 'ib-mfd-input-4.9', 'ib-mfd-regulator-4.9', 'ib-mfd-regulator-4.9.1', 'ib-mfd-regulator-rtc-4.9', 'ib-mfd-regulator-rtc-4.9-1' and 'ib-mfd-rtc-4.9' into ibs-for-mfd-merged
This commit is contained in:
Lee Jones
commit
b304746c2a
314 changed files with 5810 additions and 1405 deletions
|
|
@ -187,6 +187,16 @@ config RTC_DRV_ABX80X
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This driver can also be built as a module. If so, the module
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will be called rtc-abx80x.
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config RTC_DRV_AC100
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tristate "X-Powers AC100"
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depends on MFD_AC100
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help
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If you say yes here you get support for the real-time clock found
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in X-Powers AC100 family peripheral ICs.
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This driver can also be built as a module. If so, the module
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will be called rtc-ac100.
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config RTC_DRV_AS3722
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tristate "ams AS3722 RTC driver"
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depends on MFD_AS3722
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@ -328,11 +338,11 @@ config RTC_DRV_MAX77686
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will be called rtc-max77686.
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config RTC_DRV_RK808
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tristate "Rockchip RK808 RTC"
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tristate "Rockchip RK808/RK818 RTC"
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depends on MFD_RK808
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help
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If you say yes here you will get support for the
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RTC of RK808 PMIC.
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RTC of RK808 and RK818 PMIC.
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This driver can also be built as a module. If so, the module
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will be called rk808-rtc.
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@ -27,6 +27,7 @@ obj-$(CONFIG_RTC_DRV_AB3100) += rtc-ab3100.o
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obj-$(CONFIG_RTC_DRV_AB8500) += rtc-ab8500.o
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obj-$(CONFIG_RTC_DRV_ABB5ZES3) += rtc-ab-b5ze-s3.o
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obj-$(CONFIG_RTC_DRV_ABX80X) += rtc-abx80x.o
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obj-$(CONFIG_RTC_DRV_AC100) += rtc-ac100.o
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obj-$(CONFIG_RTC_DRV_ARMADA38X) += rtc-armada38x.o
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obj-$(CONFIG_RTC_DRV_AS3722) += rtc-as3722.o
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obj-$(CONFIG_RTC_DRV_ASM9260) += rtc-asm9260.o
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627
drivers/rtc/rtc-ac100.c
Normal file
627
drivers/rtc/rtc-ac100.c
Normal file
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@ -0,0 +1,627 @@
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/*
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* RTC Driver for X-Powers AC100
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*
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* Copyright (c) 2016 Chen-Yu Tsai
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*
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* Chen-Yu Tsai <wens@csie.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*/
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#include <linux/bcd.h>
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#include <linux/clk-provider.h>
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#include <linux/device.h>
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#include <linux/interrupt.h>
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#include <linux/kernel.h>
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#include <linux/mfd/ac100.h>
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#include <linux/module.h>
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#include <linux/mutex.h>
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#include <linux/of.h>
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#include <linux/platform_device.h>
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#include <linux/regmap.h>
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#include <linux/rtc.h>
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#include <linux/types.h>
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/* Control register */
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#define AC100_RTC_CTRL_24HOUR BIT(0)
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/* Clock output register bits */
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#define AC100_CLKOUT_PRE_DIV_SHIFT 5
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#define AC100_CLKOUT_PRE_DIV_WIDTH 3
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#define AC100_CLKOUT_MUX_SHIFT 4
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#define AC100_CLKOUT_MUX_WIDTH 1
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#define AC100_CLKOUT_DIV_SHIFT 1
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#define AC100_CLKOUT_DIV_WIDTH 3
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#define AC100_CLKOUT_EN BIT(0)
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/* RTC */
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#define AC100_RTC_SEC_MASK GENMASK(6, 0)
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#define AC100_RTC_MIN_MASK GENMASK(6, 0)
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#define AC100_RTC_HOU_MASK GENMASK(5, 0)
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#define AC100_RTC_WEE_MASK GENMASK(2, 0)
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#define AC100_RTC_DAY_MASK GENMASK(5, 0)
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#define AC100_RTC_MON_MASK GENMASK(4, 0)
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#define AC100_RTC_YEA_MASK GENMASK(7, 0)
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#define AC100_RTC_YEA_LEAP BIT(15)
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#define AC100_RTC_UPD_TRIGGER BIT(15)
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/* Alarm (wall clock) */
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#define AC100_ALM_INT_ENABLE BIT(0)
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#define AC100_ALM_SEC_MASK GENMASK(6, 0)
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#define AC100_ALM_MIN_MASK GENMASK(6, 0)
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#define AC100_ALM_HOU_MASK GENMASK(5, 0)
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#define AC100_ALM_WEE_MASK GENMASK(2, 0)
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#define AC100_ALM_DAY_MASK GENMASK(5, 0)
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#define AC100_ALM_MON_MASK GENMASK(4, 0)
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#define AC100_ALM_YEA_MASK GENMASK(7, 0)
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#define AC100_ALM_ENABLE_FLAG BIT(15)
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#define AC100_ALM_UPD_TRIGGER BIT(15)
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/*
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* The year parameter passed to the driver is usually an offset relative to
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* the year 1900. This macro is used to convert this offset to another one
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* relative to the minimum year allowed by the hardware.
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*
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* The year range is 1970 - 2069. This range is selected to match Allwinner's
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* driver.
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*/
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#define AC100_YEAR_MIN 1970
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#define AC100_YEAR_MAX 2069
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#define AC100_YEAR_OFF (AC100_YEAR_MIN - 1900)
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struct ac100_clkout {
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struct clk_hw hw;
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struct regmap *regmap;
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u8 offset;
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};
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#define to_ac100_clkout(_hw) container_of(_hw, struct ac100_clkout, hw)
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#define AC100_RTC_32K_NAME "ac100-rtc-32k"
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#define AC100_RTC_32K_RATE 32768
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#define AC100_CLKOUT_NUM 3
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static const char * const ac100_clkout_names[AC100_CLKOUT_NUM] = {
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"ac100-cko1-rtc",
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"ac100-cko2-rtc",
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"ac100-cko3-rtc",
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};
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struct ac100_rtc_dev {
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struct rtc_device *rtc;
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struct device *dev;
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struct regmap *regmap;
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int irq;
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unsigned long alarm;
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struct clk_hw *rtc_32k_clk;
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struct ac100_clkout clks[AC100_CLKOUT_NUM];
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struct clk_hw_onecell_data *clk_data;
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};
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/**
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* Clock controls for 3 clock output pins
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*/
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static const struct clk_div_table ac100_clkout_prediv[] = {
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{ .val = 0, .div = 1 },
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{ .val = 1, .div = 2 },
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{ .val = 2, .div = 4 },
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{ .val = 3, .div = 8 },
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{ .val = 4, .div = 16 },
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{ .val = 5, .div = 32 },
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{ .val = 6, .div = 64 },
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{ .val = 7, .div = 122 },
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{ },
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};
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/* Abuse the fact that one parent is 32768 Hz, and the other is 4 MHz */
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static unsigned long ac100_clkout_recalc_rate(struct clk_hw *hw,
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unsigned long prate)
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{
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struct ac100_clkout *clk = to_ac100_clkout(hw);
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unsigned int reg, div;
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regmap_read(clk->regmap, clk->offset, ®);
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/* Handle pre-divider first */
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if (prate != AC100_RTC_32K_RATE) {
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div = (reg >> AC100_CLKOUT_PRE_DIV_SHIFT) &
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((1 << AC100_CLKOUT_PRE_DIV_WIDTH) - 1);
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prate = divider_recalc_rate(hw, prate, div,
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ac100_clkout_prediv, 0);
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}
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div = (reg >> AC100_CLKOUT_DIV_SHIFT) &
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(BIT(AC100_CLKOUT_DIV_WIDTH) - 1);
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return divider_recalc_rate(hw, prate, div, NULL,
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CLK_DIVIDER_POWER_OF_TWO);
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}
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static long ac100_clkout_round_rate(struct clk_hw *hw, unsigned long rate,
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unsigned long prate)
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{
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unsigned long best_rate = 0, tmp_rate, tmp_prate;
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int i;
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if (prate == AC100_RTC_32K_RATE)
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return divider_round_rate(hw, rate, &prate, NULL,
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AC100_CLKOUT_DIV_WIDTH,
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CLK_DIVIDER_POWER_OF_TWO);
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for (i = 0; ac100_clkout_prediv[i].div; i++) {
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tmp_prate = DIV_ROUND_UP(prate, ac100_clkout_prediv[i].val);
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tmp_rate = divider_round_rate(hw, rate, &tmp_prate, NULL,
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AC100_CLKOUT_DIV_WIDTH,
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CLK_DIVIDER_POWER_OF_TWO);
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if (tmp_rate > rate)
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continue;
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if (rate - tmp_rate < best_rate - tmp_rate)
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best_rate = tmp_rate;
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}
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return best_rate;
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}
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static int ac100_clkout_determine_rate(struct clk_hw *hw,
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struct clk_rate_request *req)
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{
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struct clk_hw *best_parent;
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unsigned long best = 0;
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int i, num_parents = clk_hw_get_num_parents(hw);
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for (i = 0; i < num_parents; i++) {
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struct clk_hw *parent = clk_hw_get_parent_by_index(hw, i);
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unsigned long tmp, prate = clk_hw_get_rate(parent);
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tmp = ac100_clkout_round_rate(hw, req->rate, prate);
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if (tmp > req->rate)
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continue;
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if (req->rate - tmp < req->rate - best) {
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best = tmp;
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best_parent = parent;
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}
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}
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if (!best)
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return -EINVAL;
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req->best_parent_hw = best_parent;
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req->best_parent_rate = best;
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req->rate = best;
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return 0;
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}
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static int ac100_clkout_set_rate(struct clk_hw *hw, unsigned long rate,
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unsigned long prate)
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{
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struct ac100_clkout *clk = to_ac100_clkout(hw);
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int div = 0, pre_div = 0;
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do {
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div = divider_get_val(rate * ac100_clkout_prediv[pre_div].div,
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prate, NULL, AC100_CLKOUT_DIV_WIDTH,
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CLK_DIVIDER_POWER_OF_TWO);
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if (div >= 0)
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break;
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} while (prate != AC100_RTC_32K_RATE &&
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ac100_clkout_prediv[++pre_div].div);
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|
||||
if (div < 0)
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return div;
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|
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pre_div = ac100_clkout_prediv[pre_div].val;
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regmap_update_bits(clk->regmap, clk->offset,
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((1 << AC100_CLKOUT_DIV_WIDTH) - 1) << AC100_CLKOUT_DIV_SHIFT |
|
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((1 << AC100_CLKOUT_PRE_DIV_WIDTH) - 1) << AC100_CLKOUT_PRE_DIV_SHIFT,
|
||||
(div - 1) << AC100_CLKOUT_DIV_SHIFT |
|
||||
(pre_div - 1) << AC100_CLKOUT_PRE_DIV_SHIFT);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int ac100_clkout_prepare(struct clk_hw *hw)
|
||||
{
|
||||
struct ac100_clkout *clk = to_ac100_clkout(hw);
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||||
|
||||
return regmap_update_bits(clk->regmap, clk->offset, AC100_CLKOUT_EN,
|
||||
AC100_CLKOUT_EN);
|
||||
}
|
||||
|
||||
static void ac100_clkout_unprepare(struct clk_hw *hw)
|
||||
{
|
||||
struct ac100_clkout *clk = to_ac100_clkout(hw);
|
||||
|
||||
regmap_update_bits(clk->regmap, clk->offset, AC100_CLKOUT_EN, 0);
|
||||
}
|
||||
|
||||
static int ac100_clkout_is_prepared(struct clk_hw *hw)
|
||||
{
|
||||
struct ac100_clkout *clk = to_ac100_clkout(hw);
|
||||
unsigned int reg;
|
||||
|
||||
regmap_read(clk->regmap, clk->offset, ®);
|
||||
|
||||
return reg & AC100_CLKOUT_EN;
|
||||
}
|
||||
|
||||
static u8 ac100_clkout_get_parent(struct clk_hw *hw)
|
||||
{
|
||||
struct ac100_clkout *clk = to_ac100_clkout(hw);
|
||||
unsigned int reg;
|
||||
|
||||
regmap_read(clk->regmap, clk->offset, ®);
|
||||
|
||||
return (reg >> AC100_CLKOUT_MUX_SHIFT) & 0x1;
|
||||
}
|
||||
|
||||
static int ac100_clkout_set_parent(struct clk_hw *hw, u8 index)
|
||||
{
|
||||
struct ac100_clkout *clk = to_ac100_clkout(hw);
|
||||
|
||||
return regmap_update_bits(clk->regmap, clk->offset,
|
||||
BIT(AC100_CLKOUT_MUX_SHIFT),
|
||||
index ? BIT(AC100_CLKOUT_MUX_SHIFT) : 0);
|
||||
}
|
||||
|
||||
static const struct clk_ops ac100_clkout_ops = {
|
||||
.prepare = ac100_clkout_prepare,
|
||||
.unprepare = ac100_clkout_unprepare,
|
||||
.is_prepared = ac100_clkout_is_prepared,
|
||||
.recalc_rate = ac100_clkout_recalc_rate,
|
||||
.determine_rate = ac100_clkout_determine_rate,
|
||||
.get_parent = ac100_clkout_get_parent,
|
||||
.set_parent = ac100_clkout_set_parent,
|
||||
.set_rate = ac100_clkout_set_rate,
|
||||
};
|
||||
|
||||
static int ac100_rtc_register_clks(struct ac100_rtc_dev *chip)
|
||||
{
|
||||
struct device_node *np = chip->dev->of_node;
|
||||
const char *parents[2] = {AC100_RTC_32K_NAME};
|
||||
int i, ret;
|
||||
|
||||
chip->clk_data = devm_kzalloc(chip->dev, sizeof(*chip->clk_data) +
|
||||
sizeof(*chip->clk_data->hws) *
|
||||
AC100_CLKOUT_NUM,
|
||||
GFP_KERNEL);
|
||||
if (!chip->clk_data)
|
||||
return -ENOMEM;
|
||||
|
||||
chip->rtc_32k_clk = clk_hw_register_fixed_rate(chip->dev,
|
||||
AC100_RTC_32K_NAME,
|
||||
NULL, 0,
|
||||
AC100_RTC_32K_RATE);
|
||||
if (IS_ERR(chip->rtc_32k_clk)) {
|
||||
ret = PTR_ERR(chip->rtc_32k_clk);
|
||||
dev_err(chip->dev, "Failed to register RTC-32k clock: %d\n",
|
||||
ret);
|
||||
return ret;
|
||||
}
|
||||
|
||||
parents[1] = of_clk_get_parent_name(np, 0);
|
||||
if (!parents[1]) {
|
||||
dev_err(chip->dev, "Failed to get ADDA 4M clock\n");
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
for (i = 0; i < AC100_CLKOUT_NUM; i++) {
|
||||
struct ac100_clkout *clk = &chip->clks[i];
|
||||
struct clk_init_data init = {
|
||||
.name = ac100_clkout_names[i],
|
||||
.ops = &ac100_clkout_ops,
|
||||
.parent_names = parents,
|
||||
.num_parents = ARRAY_SIZE(parents),
|
||||
.flags = 0,
|
||||
};
|
||||
|
||||
clk->regmap = chip->regmap;
|
||||
clk->offset = AC100_CLKOUT_CTRL1 + i;
|
||||
clk->hw.init = &init;
|
||||
|
||||
ret = devm_clk_hw_register(chip->dev, &clk->hw);
|
||||
if (ret) {
|
||||
dev_err(chip->dev, "Failed to register clk '%s': %d\n",
|
||||
init.name, ret);
|
||||
goto err_unregister_rtc_32k;
|
||||
}
|
||||
|
||||
chip->clk_data->hws[i] = &clk->hw;
|
||||
}
|
||||
|
||||
chip->clk_data->num = i;
|
||||
ret = of_clk_add_hw_provider(np, of_clk_hw_onecell_get, chip->clk_data);
|
||||
if (ret)
|
||||
goto err_unregister_rtc_32k;
|
||||
|
||||
return 0;
|
||||
|
||||
err_unregister_rtc_32k:
|
||||
clk_unregister_fixed_rate(chip->rtc_32k_clk->clk);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static void ac100_rtc_unregister_clks(struct ac100_rtc_dev *chip)
|
||||
{
|
||||
of_clk_del_provider(chip->dev->of_node);
|
||||
clk_unregister_fixed_rate(chip->rtc_32k_clk->clk);
|
||||
}
|
||||
|
||||
/**
|
||||
* RTC related bits
|
||||
*/
|
||||
static int ac100_rtc_get_time(struct device *dev, struct rtc_time *rtc_tm)
|
||||
{
|
||||
struct ac100_rtc_dev *chip = dev_get_drvdata(dev);
|
||||
struct regmap *regmap = chip->regmap;
|
||||
u16 reg[7];
|
||||
int ret;
|
||||
|
||||
ret = regmap_bulk_read(regmap, AC100_RTC_SEC, reg, 7);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
rtc_tm->tm_sec = bcd2bin(reg[0] & AC100_RTC_SEC_MASK);
|
||||
rtc_tm->tm_min = bcd2bin(reg[1] & AC100_RTC_MIN_MASK);
|
||||
rtc_tm->tm_hour = bcd2bin(reg[2] & AC100_RTC_HOU_MASK);
|
||||
rtc_tm->tm_wday = bcd2bin(reg[3] & AC100_RTC_WEE_MASK);
|
||||
rtc_tm->tm_mday = bcd2bin(reg[4] & AC100_RTC_DAY_MASK);
|
||||
rtc_tm->tm_mon = bcd2bin(reg[5] & AC100_RTC_MON_MASK) - 1;
|
||||
rtc_tm->tm_year = bcd2bin(reg[6] & AC100_RTC_YEA_MASK) +
|
||||
AC100_YEAR_OFF;
|
||||
|
||||
return rtc_valid_tm(rtc_tm);
|
||||
}
|
||||
|
||||
static int ac100_rtc_set_time(struct device *dev, struct rtc_time *rtc_tm)
|
||||
{
|
||||
struct ac100_rtc_dev *chip = dev_get_drvdata(dev);
|
||||
struct regmap *regmap = chip->regmap;
|
||||
int year;
|
||||
u16 reg[8];
|
||||
|
||||
/* our RTC has a limited year range... */
|
||||
year = rtc_tm->tm_year - AC100_YEAR_OFF;
|
||||
if (year < 0 || year > (AC100_YEAR_MAX - 1900)) {
|
||||
dev_err(dev, "rtc only supports year in range %d - %d\n",
|
||||
AC100_YEAR_MIN, AC100_YEAR_MAX);
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
/* convert to BCD */
|
||||
reg[0] = bin2bcd(rtc_tm->tm_sec) & AC100_RTC_SEC_MASK;
|
||||
reg[1] = bin2bcd(rtc_tm->tm_min) & AC100_RTC_MIN_MASK;
|
||||
reg[2] = bin2bcd(rtc_tm->tm_hour) & AC100_RTC_HOU_MASK;
|
||||
reg[3] = bin2bcd(rtc_tm->tm_wday) & AC100_RTC_WEE_MASK;
|
||||
reg[4] = bin2bcd(rtc_tm->tm_mday) & AC100_RTC_DAY_MASK;
|
||||
reg[5] = bin2bcd(rtc_tm->tm_mon + 1) & AC100_RTC_MON_MASK;
|
||||
reg[6] = bin2bcd(year) & AC100_RTC_YEA_MASK;
|
||||
/* trigger write */
|
||||
reg[7] = AC100_RTC_UPD_TRIGGER;
|
||||
|
||||
/* Is it a leap year? */
|
||||
if (is_leap_year(year + AC100_YEAR_OFF + 1900))
|
||||
reg[6] |= AC100_RTC_YEA_LEAP;
|
||||
|
||||
return regmap_bulk_write(regmap, AC100_RTC_SEC, reg, 8);
|
||||
}
|
||||
|
||||
static int ac100_rtc_alarm_irq_enable(struct device *dev, unsigned int en)
|
||||
{
|
||||
struct ac100_rtc_dev *chip = dev_get_drvdata(dev);
|
||||
struct regmap *regmap = chip->regmap;
|
||||
unsigned int val;
|
||||
|
||||
val = en ? AC100_ALM_INT_ENABLE : 0;
|
||||
|
||||
return regmap_write(regmap, AC100_ALM_INT_ENA, val);
|
||||
}
|
||||
|
||||
static int ac100_rtc_get_alarm(struct device *dev, struct rtc_wkalrm *alrm)
|
||||
{
|
||||
struct ac100_rtc_dev *chip = dev_get_drvdata(dev);
|
||||
struct regmap *regmap = chip->regmap;
|
||||
struct rtc_time *alrm_tm = &alrm->time;
|
||||
u16 reg[7];
|
||||
unsigned int val;
|
||||
int ret;
|
||||
|
||||
ret = regmap_read(regmap, AC100_ALM_INT_ENA, &val);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
alrm->enabled = !!(val & AC100_ALM_INT_ENABLE);
|
||||
|
||||
ret = regmap_bulk_read(regmap, AC100_ALM_SEC, reg, 7);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
alrm_tm->tm_sec = bcd2bin(reg[0] & AC100_ALM_SEC_MASK);
|
||||
alrm_tm->tm_min = bcd2bin(reg[1] & AC100_ALM_MIN_MASK);
|
||||
alrm_tm->tm_hour = bcd2bin(reg[2] & AC100_ALM_HOU_MASK);
|
||||
alrm_tm->tm_wday = bcd2bin(reg[3] & AC100_ALM_WEE_MASK);
|
||||
alrm_tm->tm_mday = bcd2bin(reg[4] & AC100_ALM_DAY_MASK);
|
||||
alrm_tm->tm_mon = bcd2bin(reg[5] & AC100_ALM_MON_MASK) - 1;
|
||||
alrm_tm->tm_year = bcd2bin(reg[6] & AC100_ALM_YEA_MASK) +
|
||||
AC100_YEAR_OFF;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int ac100_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
|
||||
{
|
||||
struct ac100_rtc_dev *chip = dev_get_drvdata(dev);
|
||||
struct regmap *regmap = chip->regmap;
|
||||
struct rtc_time *alrm_tm = &alrm->time;
|
||||
u16 reg[8];
|
||||
int year;
|
||||
int ret;
|
||||
|
||||
/* our alarm has a limited year range... */
|
||||
year = alrm_tm->tm_year - AC100_YEAR_OFF;
|
||||
if (year < 0 || year > (AC100_YEAR_MAX - 1900)) {
|
||||
dev_err(dev, "alarm only supports year in range %d - %d\n",
|
||||
AC100_YEAR_MIN, AC100_YEAR_MAX);
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
/* convert to BCD */
|
||||
reg[0] = (bin2bcd(alrm_tm->tm_sec) & AC100_ALM_SEC_MASK) |
|
||||
AC100_ALM_ENABLE_FLAG;
|
||||
reg[1] = (bin2bcd(alrm_tm->tm_min) & AC100_ALM_MIN_MASK) |
|
||||
AC100_ALM_ENABLE_FLAG;
|
||||
reg[2] = (bin2bcd(alrm_tm->tm_hour) & AC100_ALM_HOU_MASK) |
|
||||
AC100_ALM_ENABLE_FLAG;
|
||||
/* Do not enable weekday alarm */
|
||||
reg[3] = bin2bcd(alrm_tm->tm_wday) & AC100_ALM_WEE_MASK;
|
||||
reg[4] = (bin2bcd(alrm_tm->tm_mday) & AC100_ALM_DAY_MASK) |
|
||||
AC100_ALM_ENABLE_FLAG;
|
||||
reg[5] = (bin2bcd(alrm_tm->tm_mon + 1) & AC100_ALM_MON_MASK) |
|
||||
AC100_ALM_ENABLE_FLAG;
|
||||
reg[6] = (bin2bcd(year) & AC100_ALM_YEA_MASK) |
|
||||
AC100_ALM_ENABLE_FLAG;
|
||||
/* trigger write */
|
||||
reg[7] = AC100_ALM_UPD_TRIGGER;
|
||||
|
||||
ret = regmap_bulk_write(regmap, AC100_ALM_SEC, reg, 8);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
return ac100_rtc_alarm_irq_enable(dev, alrm->enabled);
|
||||
}
|
||||
|
||||
static irqreturn_t ac100_rtc_irq(int irq, void *data)
|
||||
{
|
||||
struct ac100_rtc_dev *chip = data;
|
||||
struct regmap *regmap = chip->regmap;
|
||||
unsigned int val = 0;
|
||||
int ret;
|
||||
|
||||
mutex_lock(&chip->rtc->ops_lock);
|
||||
|
||||
/* read status */
|
||||
ret = regmap_read(regmap, AC100_ALM_INT_STA, &val);
|
||||
if (ret)
|
||||
goto out;
|
||||
|
||||
if (val & AC100_ALM_INT_ENABLE) {
|
||||
/* signal rtc framework */
|
||||
rtc_update_irq(chip->rtc, 1, RTC_AF | RTC_IRQF);
|
||||
|
||||
/* clear status */
|
||||
ret = regmap_write(regmap, AC100_ALM_INT_STA, val);
|
||||
if (ret)
|
||||
goto out;
|
||||
|
||||
/* disable interrupt */
|
||||
ret = ac100_rtc_alarm_irq_enable(chip->dev, 0);
|
||||
if (ret)
|
||||
goto out;
|
||||
}
|
||||
|
||||
out:
|
||||
mutex_unlock(&chip->rtc->ops_lock);
|
||||
return IRQ_HANDLED;
|
||||
}
|
||||
|
||||
static const struct rtc_class_ops ac100_rtc_ops = {
|
||||
.read_time = ac100_rtc_get_time,
|
||||
.set_time = ac100_rtc_set_time,
|
||||
.read_alarm = ac100_rtc_get_alarm,
|
||||
.set_alarm = ac100_rtc_set_alarm,
|
||||
.alarm_irq_enable = ac100_rtc_alarm_irq_enable,
|
||||
};
|
||||
|
||||
static int ac100_rtc_probe(struct platform_device *pdev)
|
||||
{
|
||||
struct ac100_dev *ac100 = dev_get_drvdata(pdev->dev.parent);
|
||||
struct ac100_rtc_dev *chip;
|
||||
int ret;
|
||||
|
||||
chip = devm_kzalloc(&pdev->dev, sizeof(*chip), GFP_KERNEL);
|
||||
platform_set_drvdata(pdev, chip);
|
||||
chip->dev = &pdev->dev;
|
||||
chip->regmap = ac100->regmap;
|
||||
|
||||
chip->irq = platform_get_irq(pdev, 0);
|
||||
if (chip->irq < 0) {
|
||||
dev_err(&pdev->dev, "No IRQ resource\n");
|
||||
return chip->irq;
|
||||
}
|
||||
|
||||
ret = devm_request_threaded_irq(&pdev->dev, chip->irq, NULL,
|
||||
ac100_rtc_irq,
|
||||
IRQF_SHARED | IRQF_ONESHOT,
|
||||
dev_name(&pdev->dev), chip);
|
||||
if (ret) {
|
||||
dev_err(&pdev->dev, "Could not request IRQ\n");
|
||||
return ret;
|
||||
}
|
||||
|
||||
/* always use 24 hour mode */
|
||||
regmap_write_bits(chip->regmap, AC100_RTC_CTRL, AC100_RTC_CTRL_24HOUR,
|
||||
AC100_RTC_CTRL_24HOUR);
|
||||
|
||||
/* disable counter alarm interrupt */
|
||||
regmap_write(chip->regmap, AC100_ALM_INT_ENA, 0);
|
||||
|
||||
/* clear counter alarm pending interrupts */
|
||||
regmap_write(chip->regmap, AC100_ALM_INT_STA, AC100_ALM_INT_ENABLE);
|
||||
|
||||
chip->rtc = devm_rtc_device_register(&pdev->dev, "rtc-ac100",
|
||||
&ac100_rtc_ops, THIS_MODULE);
|
||||
if (IS_ERR(chip->rtc)) {
|
||||
dev_err(&pdev->dev, "unable to register device\n");
|
||||
return PTR_ERR(chip->rtc);
|
||||
}
|
||||
|
||||
ret = ac100_rtc_register_clks(chip);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
dev_info(&pdev->dev, "RTC enabled\n");
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int ac100_rtc_remove(struct platform_device *pdev)
|
||||
{
|
||||
struct ac100_rtc_dev *chip = platform_get_drvdata(pdev);
|
||||
|
||||
ac100_rtc_unregister_clks(chip);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static const struct of_device_id ac100_rtc_match[] = {
|
||||
{ .compatible = "x-powers,ac100-rtc" },
|
||||
{ },
|
||||
};
|
||||
MODULE_DEVICE_TABLE(of, ac100_rtc_match);
|
||||
|
||||
static struct platform_driver ac100_rtc_driver = {
|
||||
.probe = ac100_rtc_probe,
|
||||
.remove = ac100_rtc_remove,
|
||||
.driver = {
|
||||
.name = "ac100-rtc",
|
||||
.of_match_table = of_match_ptr(ac100_rtc_match),
|
||||
},
|
||||
};
|
||||
module_platform_driver(ac100_rtc_driver);
|
||||
|
||||
MODULE_DESCRIPTION("X-Powers AC100 RTC driver");
|
||||
MODULE_AUTHOR("Chen-Yu Tsai <[email protected]>");
|
||||
MODULE_LICENSE("GPL v2");
|
||||
|
|
@ -428,6 +428,7 @@ static const struct pm8xxx_rtc_regs pm8941_regs = {
|
|||
*/
|
||||
static const struct of_device_id pm8xxx_id_table[] = {
|
||||
{ .compatible = "qcom,pm8921-rtc", .data = &pm8921_regs },
|
||||
{ .compatible = "qcom,pm8018-rtc", .data = &pm8921_regs },
|
||||
{ .compatible = "qcom,pm8058-rtc", .data = &pm8058_regs },
|
||||
{ .compatible = "qcom,pm8941-rtc", .data = &pm8941_regs },
|
||||
{ },
|
||||
|
|
|
|||
Loading…
Reference in a new issue