* [PATCH v2 0/2] Add support for hym8563 rtcs @ 2013-12-01 13:37 ` Heiko Stübner 0 siblings, 0 replies; 8+ messages in thread From: Heiko Stübner @ 2013-12-01 13:37 UTC (permalink / raw) To: Alessandro Zummo Cc: Rob Herring, Pawel Moll, Mark Rutland, Stephen Warren, Ian Campbell, devicetree-u79uwXL29TY76Z2rM5mHXA, Grant Likely, linux-kernel-u79uwXL29TY76Z2rM5mHXA, rtc-linux-/JYPxA39Uh5TLH3MbocFFw, Mike Turquette This series adds support for the Haoyu Microelectronics HYM8563 rtc. This chip is often used in designs around the Cortex-A9 SoCs from Rockchip to provide rtc functionality and the 32kHz suspend clock the SoC needs. changes since v1: - add haoyu prefix to vendor-prefixes.txt - use gpio_to_irq to get the alarm interrupt instead of specifying it separately to the gpio itself Heiko Stuebner (2): dt-bindings: add hym8563 binding rtc: add hym8563 rtc-driver .../devicetree/bindings/rtc/haoyu,hym8563.txt | 27 + .../devicetree/bindings/vendor-prefixes.txt | 1 + drivers/rtc/Kconfig | 11 + drivers/rtc/Makefile | 1 + drivers/rtc/rtc-hym8563.c | 626 ++++++++++++++++++++ 5 files changed, 666 insertions(+) create mode 100644 Documentation/devicetree/bindings/rtc/haoyu,hym8563.txt create mode 100644 drivers/rtc/rtc-hym8563.c -- 1.7.10.4 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html ^ permalink raw reply [flat|nested] 8+ messages in thread
* [PATCH v2 0/2] Add support for hym8563 rtcs @ 2013-12-01 13:37 ` Heiko Stübner 0 siblings, 0 replies; 8+ messages in thread From: Heiko Stübner @ 2013-12-01 13:37 UTC (permalink / raw) To: Alessandro Zummo Cc: Rob Herring, Pawel Moll, Mark Rutland, Stephen Warren, Ian Campbell, devicetree, Grant Likely, linux-kernel, rtc-linux, Mike Turquette This series adds support for the Haoyu Microelectronics HYM8563 rtc. This chip is often used in designs around the Cortex-A9 SoCs from Rockchip to provide rtc functionality and the 32kHz suspend clock the SoC needs. changes since v1: - add haoyu prefix to vendor-prefixes.txt - use gpio_to_irq to get the alarm interrupt instead of specifying it separately to the gpio itself Heiko Stuebner (2): dt-bindings: add hym8563 binding rtc: add hym8563 rtc-driver .../devicetree/bindings/rtc/haoyu,hym8563.txt | 27 + .../devicetree/bindings/vendor-prefixes.txt | 1 + drivers/rtc/Kconfig | 11 + drivers/rtc/Makefile | 1 + drivers/rtc/rtc-hym8563.c | 626 ++++++++++++++++++++ 5 files changed, 666 insertions(+) create mode 100644 Documentation/devicetree/bindings/rtc/haoyu,hym8563.txt create mode 100644 drivers/rtc/rtc-hym8563.c -- 1.7.10.4 ^ permalink raw reply [flat|nested] 8+ messages in thread
[parent not found: <201312011437.47432.heiko-4mtYJXux2i+zQB+pC5nmwQ@public.gmane.org>]
* [PATCH v2 1/2] dt-bindings: add hym8563 binding 2013-12-01 13:37 ` Heiko Stübner @ 2013-12-01 13:38 ` Heiko Stübner -1 siblings, 0 replies; 8+ messages in thread From: Heiko Stübner @ 2013-12-01 13:38 UTC (permalink / raw) To: Alessandro Zummo Cc: Rob Herring, Pawel Moll, Mark Rutland, Stephen Warren, Ian Campbell, devicetree-u79uwXL29TY76Z2rM5mHXA, Grant Likely, linux-kernel-u79uwXL29TY76Z2rM5mHXA, rtc-linux-/JYPxA39Uh5TLH3MbocFFw, Mike Turquette Add binding documentation for the hym8563 rtc chip. Signed-off-by: Heiko Stuebner <heiko-4mtYJXux2i+zQB+pC5nmwQ@public.gmane.org> --- .../devicetree/bindings/rtc/haoyu,hym8563.txt | 27 ++++++++++++++++++++ .../devicetree/bindings/vendor-prefixes.txt | 1 + 2 files changed, 28 insertions(+) create mode 100644 Documentation/devicetree/bindings/rtc/haoyu,hym8563.txt diff --git a/Documentation/devicetree/bindings/rtc/haoyu,hym8563.txt b/Documentation/devicetree/bindings/rtc/haoyu,hym8563.txt new file mode 100644 index 0000000..5ec0828 --- /dev/null +++ b/Documentation/devicetree/bindings/rtc/haoyu,hym8563.txt @@ -0,0 +1,27 @@ +Haoyu Microelectronics HYM8563 Real Time Clock + +The HYM8563 provides basic rtc and alarm functionality +as well as a clock output of up to 32kHz. + +Required properties: +- compatible: should be: "haoyu,hym8563" +- reg: i2c address +- gpios: alarm interrupt gpio +- #clock-cells: the value should be 0 + +Example: + +hym8563: hym8563@51 { + compatible = "haoyu,hym8563"; + reg = <0x51>; + + gpios = <&gpio0 13 0>; + + #clock-cells = <0>; +}; + +device { +... + clocks = <&hym8563>; +... +}; diff --git a/Documentation/devicetree/bindings/vendor-prefixes.txt b/Documentation/devicetree/bindings/vendor-prefixes.txt index 2956800..3452270 100644 --- a/Documentation/devicetree/bindings/vendor-prefixes.txt +++ b/Documentation/devicetree/bindings/vendor-prefixes.txt @@ -28,6 +28,7 @@ est ESTeem Wireless Modems fsl Freescale Semiconductor GEFanuc GE Fanuc Intelligent Platforms Embedded Systems, Inc. gef GE Fanuc Intelligent Platforms Embedded Systems, Inc. +haoyu Haoyu Microelectronic Co. Ltd. hisilicon Hisilicon Limited. hp Hewlett Packard ibm International Business Machines (IBM) -- 1.7.10.4 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html ^ permalink raw reply related [flat|nested] 8+ messages in thread
* [PATCH v2 1/2] dt-bindings: add hym8563 binding @ 2013-12-01 13:38 ` Heiko Stübner 0 siblings, 0 replies; 8+ messages in thread From: Heiko Stübner @ 2013-12-01 13:38 UTC (permalink / raw) To: Alessandro Zummo Cc: Rob Herring, Pawel Moll, Mark Rutland, Stephen Warren, Ian Campbell, devicetree, Grant Likely, linux-kernel, rtc-linux, Mike Turquette Add binding documentation for the hym8563 rtc chip. Signed-off-by: Heiko Stuebner <heiko@sntech.de> --- .../devicetree/bindings/rtc/haoyu,hym8563.txt | 27 ++++++++++++++++++++ .../devicetree/bindings/vendor-prefixes.txt | 1 + 2 files changed, 28 insertions(+) create mode 100644 Documentation/devicetree/bindings/rtc/haoyu,hym8563.txt diff --git a/Documentation/devicetree/bindings/rtc/haoyu,hym8563.txt b/Documentation/devicetree/bindings/rtc/haoyu,hym8563.txt new file mode 100644 index 0000000..5ec0828 --- /dev/null +++ b/Documentation/devicetree/bindings/rtc/haoyu,hym8563.txt @@ -0,0 +1,27 @@ +Haoyu Microelectronics HYM8563 Real Time Clock + +The HYM8563 provides basic rtc and alarm functionality +as well as a clock output of up to 32kHz. + +Required properties: +- compatible: should be: "haoyu,hym8563" +- reg: i2c address +- gpios: alarm interrupt gpio +- #clock-cells: the value should be 0 + +Example: + +hym8563: hym8563@51 { + compatible = "haoyu,hym8563"; + reg = <0x51>; + + gpios = <&gpio0 13 0>; + + #clock-cells = <0>; +}; + +device { +... + clocks = <&hym8563>; +... +}; diff --git a/Documentation/devicetree/bindings/vendor-prefixes.txt b/Documentation/devicetree/bindings/vendor-prefixes.txt index 2956800..3452270 100644 --- a/Documentation/devicetree/bindings/vendor-prefixes.txt +++ b/Documentation/devicetree/bindings/vendor-prefixes.txt @@ -28,6 +28,7 @@ est ESTeem Wireless Modems fsl Freescale Semiconductor GEFanuc GE Fanuc Intelligent Platforms Embedded Systems, Inc. gef GE Fanuc Intelligent Platforms Embedded Systems, Inc. +haoyu Haoyu Microelectronic Co. Ltd. hisilicon Hisilicon Limited. hp Hewlett Packard ibm International Business Machines (IBM) -- 1.7.10.4 ^ permalink raw reply related [flat|nested] 8+ messages in thread
* [PATCH v2 2/2] rtc: add hym8563 rtc-driver 2013-12-01 13:37 ` Heiko Stübner (?) (?) @ 2013-12-01 13:39 ` Heiko Stübner [not found] ` <201312011439.45417.heiko-4mtYJXux2i+zQB+pC5nmwQ@public.gmane.org> -1 siblings, 1 reply; 8+ messages in thread From: Heiko Stübner @ 2013-12-01 13:39 UTC (permalink / raw) To: Alessandro Zummo Cc: Rob Herring, Pawel Moll, Mark Rutland, Stephen Warren, Ian Campbell, devicetree, Grant Likely, linux-kernel, rtc-linux, Mike Turquette The Haoyu Microelectronics HYM8563 provides rtc- and alarm functions as well as a clock output of up to 32kHz. Signed-off-by: Heiko Stuebner <heiko@sntech.de> --- drivers/rtc/Kconfig | 11 + drivers/rtc/Makefile | 1 + drivers/rtc/rtc-hym8563.c | 626 +++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 638 insertions(+) create mode 100644 drivers/rtc/rtc-hym8563.c diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig index 9654aa3..bf2c572 100644 --- a/drivers/rtc/Kconfig +++ b/drivers/rtc/Kconfig @@ -202,6 +202,17 @@ config RTC_DRV_DS3232 This driver can also be built as a module. If so, the module will be called rtc-ds3232. +config RTC_DRV_HYM8563 + tristate "Haoyu Microelectronics HYM8563" + depends on I2C && OF && GPIOLIB + help + Say Y to enable support for the HYM8563 I2C RTC chip. Apart + from the usual rtc functions it provides a clock output of + up to 32kHz. + + This driver can also be built as a module. If so, the module + will be called rtc-hym8563. + config RTC_DRV_LP8788 tristate "TI LP8788 RTC driver" depends on MFD_LP8788 diff --git a/drivers/rtc/Makefile b/drivers/rtc/Makefile index 2dff3d2..92f9d2c 100644 --- a/drivers/rtc/Makefile +++ b/drivers/rtc/Makefile @@ -54,6 +54,7 @@ obj-$(CONFIG_RTC_DRV_EP93XX) += rtc-ep93xx.o obj-$(CONFIG_RTC_DRV_FM3130) += rtc-fm3130.o obj-$(CONFIG_RTC_DRV_GENERIC) += rtc-generic.o obj-$(CONFIG_RTC_DRV_HID_SENSOR_TIME) += rtc-hid-sensor-time.o +obj-$(CONFIG_RTC_DRV_HYM8563) += rtc-hym8563.o obj-$(CONFIG_RTC_DRV_IMXDI) += rtc-imxdi.o obj-$(CONFIG_RTC_DRV_ISL1208) += rtc-isl1208.o obj-$(CONFIG_RTC_DRV_ISL12022) += rtc-isl12022.o diff --git a/drivers/rtc/rtc-hym8563.c b/drivers/rtc/rtc-hym8563.c new file mode 100644 index 0000000..2dc4154 --- /dev/null +++ b/drivers/rtc/rtc-hym8563.c @@ -0,0 +1,626 @@ +/* + * Haoyu HYM8563 RTC driver + * + * Copyright (C) 2013 MundoReader S.L. + * Author: Heiko Stuebner <heiko@sntech.de> + * + * based on rtc-HYM8563 + * Copyright (C) 2010 ROCKCHIP, Inc. + * + * This software is licensed under the terms of the GNU General Public + * License version 2, as published by the Free Software Foundation, and + * may be copied, distributed, and modified under those terms. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <linux/module.h> +#include <linux/clk-provider.h> +#include <linux/i2c.h> +#include <linux/bcd.h> +#include <linux/rtc.h> +#include <linux/delay.h> +#include <linux/slab.h> +#include <linux/gpio.h> +#include <linux/of_gpio.h> + +#define HYM8563_CTL1 0x00 +#define HYM8563_CTL1_TEST BIT(7) +#define HYM8563_CTL1_STOP BIT(5) +#define HYM8563_CTL1_TESTC BIT(3) + +#define HYM8563_CTL2 0x01 +#define HYM8563_CTL2_TI_TP BIT(4) +#define HYM8563_CTL2_AF BIT(3) +#define HYM8563_CTL2_TF BIT(2) +#define HYM8563_CTL2_AIE BIT(1) +#define HYM8563_CTL2_TIE BIT(0) + +#define HYM8563_SEC 0x02 +#define HYM8563_SEC_VL BIT(7) +#define HYM8563_SEC_MASK 0x7f + +#define HYM8563_MIN 0x03 +#define HYM8563_MIN_MASK 0x7f + +#define HYM8563_HOUR 0x04 +#define HYM8563_HOUR_MASK 0x3f + +#define HYM8563_DAY 0x05 +#define HYM8563_DAY_MASK 0x3f + +#define HYM8563_WEEKDAY 0x06 +#define HYM8563_WEEKDAY_MASK 0x07 + +#define HYM8563_MONTH 0x07 +#define HYM8563_MONTH_CENTURY BIT(7) +#define HYM8563_MONTH_MASK 0x1f + +#define HYM8563_YEAR 0x08 + +#define HYM8563_ALM_MIN 0x09 +#define HYM8563_ALM_HOUR 0x0a +#define HYM8563_ALM_DAY 0x0b +#define HYM8563_ALM_WEEK 0x0c + +/* Each alarm check can be disabled by setting this bit in the register */ +#define HYM8563_ALM_BIT_DISABLE BIT(7) + +#define HYM8563_CLKOUT 0x0d +#define HYM8563_CLKOUT_DISABLE BIT(7) +#define HYM8563_CLKOUT_32768 0 +#define HYM8563_CLKOUT_1024 1 +#define HYM8563_CLKOUT_32 2 +#define HYM8563_CLKOUT_1 3 +#define HYM8563_CLKOUT_MASK 3 + +#define HYM8563_TMR_CTL 0x0e +#define HYM8563_TMR_CTL_ENABLE BIT(7) +#define HYM8563_TMR_CTL_4096 0 +#define HYM8563_TMR_CTL_64 1 +#define HYM8563_TMR_CTL_1 2 +#define HYM8563_TMR_CTL_1_60 3 +#define HYM8563_TMR_CTL_MASK 3 + +#define HYM8563_TMR_CNT 0x0f + +struct hym8563 { + struct i2c_client *client; + struct rtc_device *rtc; + bool valid; + struct clk_hw clkout_hw; +}; + +/* + * RTC handling + */ + +static int hym8563_rtc_read_time(struct device *dev, struct rtc_time *tm) +{ + struct i2c_client *client = to_i2c_client(dev); + struct hym8563 *hym8563 = i2c_get_clientdata(client); + u8 buf[7]; + int ret; + + if (!hym8563->valid) { + dev_warn(&client->dev, "no valid clock/calendar values available\n"); + return -EPERM; + } + + ret = i2c_smbus_read_i2c_block_data(client, HYM8563_SEC, 7, buf); + + tm->tm_sec = bcd2bin(buf[0] & HYM8563_SEC_MASK); + tm->tm_min = bcd2bin(buf[1] & HYM8563_MIN_MASK); + tm->tm_hour = bcd2bin(buf[2] & HYM8563_HOUR_MASK); + tm->tm_mday = bcd2bin(buf[3] & HYM8563_DAY_MASK); + tm->tm_wday = bcd2bin(buf[4] & HYM8563_WEEKDAY_MASK); /* 0 = Sun */ + tm->tm_mon = bcd2bin(buf[5] & HYM8563_MONTH_MASK) - 1; /* 0 = Jan */ + tm->tm_year = bcd2bin(buf[6]) + 100; + + return 0; +} + +static int hym8563_rtc_set_time(struct device *dev, struct rtc_time *tm) +{ + struct i2c_client *client = to_i2c_client(dev); + struct hym8563 *hym8563 = i2c_get_clientdata(client); + u8 buf[7]; + int ret; + + /* Years >= 2100 are to far in the future, 19XX is to early */ + if (tm->tm_year < 100 || tm->tm_year >= 200) + return -EINVAL; + + buf[0] = bin2bcd(tm->tm_sec); + buf[1] = bin2bcd(tm->tm_min); + buf[2] = bin2bcd(tm->tm_hour); + buf[3] = bin2bcd(tm->tm_mday); + buf[4] = bin2bcd(tm->tm_wday); + buf[5] = bin2bcd(tm->tm_mon + 1); + + /* + * While the HYM8563 has a century flag in the month register, + * it does not seem to carry it over a subsequent write/read. + * So we'll limit ourself to 100 years, starting at 2000 for now. + */ + buf[6] = tm->tm_year - 100; + + /* + * CTL1 only contains TEST-mode bits apart from stop, + * so no need to read the value first + */ + ret = i2c_smbus_write_byte_data(client, HYM8563_CTL1, + HYM8563_CTL1_STOP); + if (ret < 0) + return ret; + + ret = i2c_smbus_write_i2c_block_data(client, HYM8563_SEC, 7, buf); + if (ret < 0) + return ret; + + ret = i2c_smbus_write_byte_data(client, HYM8563_CTL1, 0); + if (ret < 0) + return ret; + + hym8563->valid = true; + + return 0; +} + +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) +{ + struct i2c_client *client = to_i2c_client(dev); + struct rtc_time *alm_tm = &alm->time; + u8 buf[4]; + int ret; + + ret = i2c_smbus_read_i2c_block_data(client, HYM8563_ALM_MIN, 4, buf); + if (ret < 0) + return ret; + + /* The alarm only has a minute accuracy */ + alm_tm->tm_sec = -1; + + alm_tm->tm_min = (buf[0] & HYM8563_ALM_BIT_DISABLE) ? + -1 : + bcd2bin(buf[0] & HYM8563_MIN_MASK); + alm_tm->tm_hour = (buf[1] & HYM8563_ALM_BIT_DISABLE) ? + -1 : + bcd2bin(buf[1] & HYM8563_HOUR_MASK); + alm_tm->tm_mday = (buf[2] & HYM8563_ALM_BIT_DISABLE) ? + -1 : + bcd2bin(buf[2] & HYM8563_DAY_MASK); + alm_tm->tm_wday = (buf[3] & HYM8563_ALM_BIT_DISABLE) ? + -1 : + bcd2bin(buf[3] & HYM8563_WEEKDAY_MASK); + + alm_tm->tm_mon = -1; + alm_tm->tm_year = -1; + + ret = i2c_smbus_read_byte_data(client, HYM8563_CTL2); + if (ret < 0) + return ret; + + if (ret & HYM8563_CTL2_AIE) + alm->enabled = 1; + + return 0; +} + +static int hym8563_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alm) +{ + struct i2c_client *client = to_i2c_client(dev); + struct rtc_time *alm_tm = &alm->time; + u8 buf[4]; + int ret; + + /* + * The alarm has no seconds so deal with it + */ + if (alm_tm->tm_sec) { + alm_tm->tm_sec = 0; + alm_tm->tm_min++; + if (alm_tm->tm_min >= 60) { + alm_tm->tm_min = 0; + alm_tm->tm_hour++; + if (alm_tm->tm_hour >= 24) { + alm_tm->tm_hour = 0; + alm_tm->tm_mday++; + if (alm_tm->tm_mday > 31) + alm_tm->tm_mday = 0; + } + } + } + + ret = i2c_smbus_read_byte_data(client, HYM8563_CTL2); + if (ret < 0) + return ret; + + ret &= ~HYM8563_CTL2_AIE; + + ret = i2c_smbus_write_byte_data(client, HYM8563_CTL2, ret); + if (ret < 0) + return ret; + + buf[0] = (alm_tm->tm_min < 60 && alm_tm->tm_min >= 0) ? + bin2bcd(alm_tm->tm_min) : HYM8563_ALM_BIT_DISABLE; + + buf[1] = (alm_tm->tm_hour < 24 && alm_tm->tm_hour >= 0) ? + bin2bcd(alm_tm->tm_hour) : HYM8563_ALM_BIT_DISABLE; + + buf[2] = (alm_tm->tm_mday <= 31 && alm_tm->tm_mday >= 1) ? + bin2bcd(alm_tm->tm_mday) : HYM8563_ALM_BIT_DISABLE; + + buf[3] = (alm_tm->tm_wday < 7 && alm_tm->tm_wday >= 0) ? + bin2bcd(alm_tm->tm_wday) : HYM8563_ALM_BIT_DISABLE; + + ret = i2c_smbus_write_i2c_block_data(client, HYM8563_ALM_MIN, 4, buf); + if (ret < 0) + return ret; + + return hym8563_rtc_alarm_irq_enable(dev, alm->enabled); +} + +static const struct rtc_class_ops hym8563_rtc_ops = { + .read_time = hym8563_rtc_read_time, + .set_time = hym8563_rtc_set_time, + .alarm_irq_enable = hym8563_rtc_alarm_irq_enable, + .read_alarm = hym8563_rtc_read_alarm, + .set_alarm = hym8563_rtc_set_alarm, +}; + +/* + * Handling of the clkout + */ + +#define clkout_hw_to_hym8563(_hw) container_of(_hw, struct hym8563, clkout_hw) + +static int clkout_rates[] = { + 32768, + 1024, + 32, + 1, +}; + +static unsigned long hym8563_clkout_recalc_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + struct hym8563 *hym8563 = clkout_hw_to_hym8563(hw); + struct i2c_client *client = hym8563->client; + int ret = i2c_smbus_read_byte_data(client, HYM8563_CLKOUT); + + if (ret < 0 || ret & HYM8563_CLKOUT_DISABLE) + return 0; + + ret &= HYM8563_CLKOUT_MASK; + return clkout_rates[ret]; +} + +static long hym8563_clkout_round_rate(struct clk_hw *hw, unsigned long rate, + unsigned long *prate) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(clkout_rates); i++) + if (clkout_rates[i] <= rate) + return clkout_rates[i]; + + return 0; +} + +static int hym8563_clkout_set_rate(struct clk_hw *hw, unsigned long rate, + unsigned long parent_rate) +{ + struct hym8563 *hym8563 = clkout_hw_to_hym8563(hw); + struct i2c_client *client = hym8563->client; + int ret = i2c_smbus_read_byte_data(client, HYM8563_CLKOUT); + int i; + + if (ret < 0) + return ret; + + for (i = 0; i < ARRAY_SIZE(clkout_rates); i++) + if (clkout_rates[i] == rate) { + ret &= ~HYM8563_CLKOUT_MASK; + ret |= i; + return i2c_smbus_write_byte_data(client, + HYM8563_CLKOUT, ret); + } + + return -EINVAL; +} + +static int hym8563_clkout_control(struct clk_hw *hw, bool enable) +{ + struct hym8563 *hym8563 = clkout_hw_to_hym8563(hw); + struct i2c_client *client = hym8563->client; + int ret = i2c_smbus_read_byte_data(client, HYM8563_CLKOUT); + + if (ret < 0) + return ret; + + if (enable) + ret &= ~HYM8563_CLKOUT_DISABLE; + else + ret |= HYM8563_CLKOUT_DISABLE; + + return i2c_smbus_write_byte_data(client, HYM8563_CLKOUT, ret); +} + +static int hym8563_clkout_prepare(struct clk_hw *hw) +{ + return hym8563_clkout_control(hw, 1); +} + +static void hym8563_clkout_unprepare(struct clk_hw *hw) +{ + hym8563_clkout_control(hw, 0); +} + +static int hym8563_clkout_is_prepared(struct clk_hw *hw) +{ + struct hym8563 *hym8563 = clkout_hw_to_hym8563(hw); + struct i2c_client *client = hym8563->client; + int ret = i2c_smbus_read_byte_data(client, HYM8563_CLKOUT); + + if (ret < 0) + return ret; + + return !(ret & HYM8563_CLKOUT_DISABLE); +} + +const struct clk_ops hym8563_clkout_ops = { + .prepare = hym8563_clkout_prepare, + .unprepare = hym8563_clkout_unprepare, + .is_prepared = hym8563_clkout_is_prepared, + .recalc_rate = hym8563_clkout_recalc_rate, + .round_rate = hym8563_clkout_round_rate, + .set_rate = hym8563_clkout_set_rate, +}; + +static struct clk *hym8563_clkout_register_clk(struct hym8563 *hym8563) +{ + struct i2c_client *client = hym8563->client; + struct device_node *node = client->dev.of_node; + struct clk *clk; + struct clk_init_data init; + int ret; + + ret = i2c_smbus_write_byte_data(client, HYM8563_CLKOUT, + HYM8563_CLKOUT_DISABLE); + if (ret < 0) + return ERR_PTR(ret); + + init.name = "hym8563-clkout"; + init.ops = &hym8563_clkout_ops; + init.flags = CLK_IS_ROOT; + init.parent_names = NULL; + init.num_parents = 0; + hym8563->clkout_hw.init = &init; + + /* register the clock */ + clk = clk_register(&client->dev, &hym8563->clkout_hw); + + if (!IS_ERR(clk)) + of_clk_add_provider(node, of_clk_src_simple_get, clk); + + return clk; +} + +/* + * 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) +{ + struct hym8563 *hym8563 = (struct hym8563 *)dev_id; + struct i2c_client *client = hym8563->client; + struct mutex *lock = &hym8563->rtc->ops_lock; + int data, ret; + + mutex_lock(lock); + + /* Clear the alarm flag */ + + data = i2c_smbus_read_byte_data(client, HYM8563_CTL2); + if (data < 0) { + dev_err(&client->dev, "%s: error reading i2c data %d\n", + __func__, data); + goto out; + } + + data &= ~HYM8563_CTL2_AF; + + ret = i2c_smbus_write_byte_data(client, HYM8563_CTL2, data); + if (ret < 0) { + dev_err(&client->dev, "%s: error writing i2c data %d\n", + __func__, ret); + } + +out: + mutex_unlock(lock); + return IRQ_HANDLED; +} + +static int hym8563_init_device(struct i2c_client *client) +{ + int ret; + + /* Clear stop flag if present */ + ret = i2c_smbus_write_byte_data(client, HYM8563_CTL1, 0); + if (ret < 0) + return ret; + + ret = i2c_smbus_read_byte_data(client, HYM8563_CTL2); + if (ret < 0) + return ret; + + /* Disable alarm and timer interrupts */ + ret &= ~HYM8563_CTL2_AIE; + ret &= ~HYM8563_CTL2_TIE; + + /* Clear any pending alarm and timer flags */ + if (ret & HYM8563_CTL2_AF) + ret &= ~HYM8563_CTL2_AF; + + if (ret & HYM8563_CTL2_TF) + ret &= ~HYM8563_CTL2_TF; + + ret &= ~HYM8563_CTL2_TI_TP; + + return i2c_smbus_write_byte_data(client, HYM8563_CTL2, ret); +} + +#ifdef CONFIG_PM_SLEEP +static int hym8563_suspend(struct device *dev) +{ + struct i2c_client *client = to_i2c_client(dev); + int ret; + + if (device_may_wakeup(dev)) { + ret = enable_irq_wake(client->irq); + if (ret) { + dev_err(dev, "enable_irq_wake failed, %d\n", ret); + return ret; + } + } + + return 0; +} + +static int hym8563_resume(struct device *dev) +{ + struct i2c_client *client = to_i2c_client(dev); + + if (device_may_wakeup(dev)) + disable_irq_wake(client->irq); + + return 0; +} +#endif + +static SIMPLE_DEV_PM_OPS(hym8563_pm_ops, hym8563_suspend, hym8563_resume); + +static int hym8563_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct hym8563 *hym8563; + int ret, gpio_int; + + hym8563 = devm_kzalloc(&client->dev, sizeof(hym8563), GFP_KERNEL); + if (!hym8563) + return -ENOMEM; + + hym8563->client = client; + i2c_set_clientdata(client, hym8563); + + device_set_wakeup_capable(&client->dev, true); + + gpio_int = of_get_gpio(client->dev.of_node, 0); + if (!gpio_is_valid(gpio_int)) { + dev_err(&client->dev, "failed to get interrupt gpio\n"); + return -EINVAL; + } + + ret = devm_gpio_request_one(&client->dev, gpio_int, + GPIOF_DIR_IN, "hym8563_int"); + if (ret) { + dev_err(&client->dev, "request of gpio %d failed, %d\n", + gpio_int, ret); + return ret; + } + + client->irq = gpio_to_irq(gpio_int); + if (client->irq < 0) { + dev_err(&client->dev, "could not get irq of gpio %d, %d\n", + gpio_int, client->irq); + return client->irq; + } + + ret = hym8563_init_device(client); + if (ret) { + dev_err(&client->dev, "could not init device, %d\n", ret); + return ret; + } + + ret = devm_request_threaded_irq(&client->dev, client->irq, + NULL, hym8563_irq, + IRQF_TRIGGER_LOW | IRQF_ONESHOT, + client->name, hym8563); + if (ret < 0) { + dev_err(&client->dev, "irq %d request failed, %d\n", + client->irq, ret); + return ret; + } + + /* check state of calendar information */ + ret = i2c_smbus_read_byte_data(client, HYM8563_SEC); + if (ret < 0) + return ret; + + hym8563->valid = !(ret & HYM8563_SEC_VL); + dev_dbg(&client->dev, "rtc information is %s\n", + hym8563->valid ? "valid" : "invalid"); + + hym8563->rtc = devm_rtc_device_register(&client->dev, client->name, + &hym8563_rtc_ops, THIS_MODULE); + if (IS_ERR(hym8563->rtc)) + return PTR_ERR(hym8563->rtc); + + if (IS_ENABLED(CONFIG_COMMON_CLK)) + hym8563_clkout_register_clk(hym8563); + + return 0; +} + +static const struct i2c_device_id hym8563_id[] = { + { "hym8563", 0 }, + {}, +}; +MODULE_DEVICE_TABLE(i2c, hym8563_id); + +static struct of_device_id hym8563_dt_idtable[] = { + { .compatible = "haoyu,hym8563" }, + {}, +}; +MODULE_DEVICE_TABLE(of, hym8563_dt_idtable); + +static struct i2c_driver hym8563_driver = { + .driver = { + .name = "rtc-hym8563", + .owner = THIS_MODULE, + .pm = &hym8563_pm_ops, + .of_match_table = of_match_ptr(hym8563_dt_idtable), + }, + .probe = hym8563_probe, + .id_table = hym8563_id, +}; + +module_i2c_driver(hym8563_driver); + +MODULE_AUTHOR("Heiko Stuebner <heiko@sntech.de>"); +MODULE_DESCRIPTION("HYM8563 RTC driver"); +MODULE_LICENSE("GPL"); -- 1.7.10.4 ^ permalink raw reply related [flat|nested] 8+ messages in thread
[parent not found: <201312011439.45417.heiko-4mtYJXux2i+zQB+pC5nmwQ@public.gmane.org>]
* Re: [PATCH v2 2/2] rtc: add hym8563 rtc-driver 2013-12-01 13:39 ` [PATCH v2 2/2] rtc: add hym8563 rtc-driver Heiko Stübner @ 2013-12-01 14:38 ` Richard Weinberger 0 siblings, 0 replies; 8+ messages in thread From: Richard Weinberger @ 2013-12-01 14:38 UTC (permalink / raw) To: Heiko Stübner Cc: Alessandro Zummo, Rob Herring, Pawel Moll, Mark Rutland, Stephen Warren, Ian Campbell, devicetree-u79uwXL29TY76Z2rM5mHXA, Grant Likely, LKML, rtc-linux-/JYPxA39Uh5TLH3MbocFFw, Mike Turquette On Sun, Dec 1, 2013 at 2:39 PM, Heiko Stübner <heiko-4mtYJXux2i+zQB+pC5nmwQ@public.gmane.org> wrote: > The Haoyu Microelectronics HYM8563 provides rtc- and alarm functions > as well as a clock output of up to 32kHz. > > Signed-off-by: Heiko Stuebner <heiko-4mtYJXux2i+zQB+pC5nmwQ@public.gmane.org> > --- > drivers/rtc/Kconfig | 11 + > drivers/rtc/Makefile | 1 + > drivers/rtc/rtc-hym8563.c | 626 +++++++++++++++++++++++++++++++++++++++++++++ > 3 files changed, 638 insertions(+) > create mode 100644 drivers/rtc/rtc-hym8563.c > > diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig > index 9654aa3..bf2c572 100644 > --- a/drivers/rtc/Kconfig > +++ b/drivers/rtc/Kconfig > @@ -202,6 +202,17 @@ config RTC_DRV_DS3232 > This driver can also be built as a module. If so, the module > will be called rtc-ds3232. > > +config RTC_DRV_HYM8563 > + tristate "Haoyu Microelectronics HYM8563" > + depends on I2C && OF && GPIOLIB > + help > + Say Y to enable support for the HYM8563 I2C RTC chip. Apart > + from the usual rtc functions it provides a clock output of > + up to 32kHz. > + > + This driver can also be built as a module. If so, the module > + will be called rtc-hym8563. > + > config RTC_DRV_LP8788 > tristate "TI LP8788 RTC driver" > depends on MFD_LP8788 > diff --git a/drivers/rtc/Makefile b/drivers/rtc/Makefile > index 2dff3d2..92f9d2c 100644 > --- a/drivers/rtc/Makefile > +++ b/drivers/rtc/Makefile > @@ -54,6 +54,7 @@ obj-$(CONFIG_RTC_DRV_EP93XX) += rtc-ep93xx.o > obj-$(CONFIG_RTC_DRV_FM3130) += rtc-fm3130.o > obj-$(CONFIG_RTC_DRV_GENERIC) += rtc-generic.o > obj-$(CONFIG_RTC_DRV_HID_SENSOR_TIME) += rtc-hid-sensor-time.o > +obj-$(CONFIG_RTC_DRV_HYM8563) += rtc-hym8563.o > obj-$(CONFIG_RTC_DRV_IMXDI) += rtc-imxdi.o > obj-$(CONFIG_RTC_DRV_ISL1208) += rtc-isl1208.o > obj-$(CONFIG_RTC_DRV_ISL12022) += rtc-isl12022.o > diff --git a/drivers/rtc/rtc-hym8563.c b/drivers/rtc/rtc-hym8563.c > new file mode 100644 > index 0000000..2dc4154 > --- /dev/null > +++ b/drivers/rtc/rtc-hym8563.c > @@ -0,0 +1,626 @@ > +/* > + * Haoyu HYM8563 RTC driver > + * > + * Copyright (C) 2013 MundoReader S.L. > + * Author: Heiko Stuebner <heiko-4mtYJXux2i+zQB+pC5nmwQ@public.gmane.org> > + * > + * based on rtc-HYM8563 > + * Copyright (C) 2010 ROCKCHIP, Inc. > + * > + * This software is licensed under the terms of the GNU General Public > + * License version 2, as published by the Free Software Foundation, and > + * may be copied, distributed, and modified under those terms. > + * > + * This program is distributed in the hope that it will be useful, > + * but WITHOUT ANY WARRANTY; without even the implied warranty of > + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the > + * GNU General Public License for more details. > + */ > + > +#include <linux/module.h> > +#include <linux/clk-provider.h> > +#include <linux/i2c.h> > +#include <linux/bcd.h> > +#include <linux/rtc.h> > +#include <linux/delay.h> > +#include <linux/slab.h> > +#include <linux/gpio.h> > +#include <linux/of_gpio.h> > + > +#define HYM8563_CTL1 0x00 > +#define HYM8563_CTL1_TEST BIT(7) > +#define HYM8563_CTL1_STOP BIT(5) > +#define HYM8563_CTL1_TESTC BIT(3) > + > +#define HYM8563_CTL2 0x01 > +#define HYM8563_CTL2_TI_TP BIT(4) > +#define HYM8563_CTL2_AF BIT(3) > +#define HYM8563_CTL2_TF BIT(2) > +#define HYM8563_CTL2_AIE BIT(1) > +#define HYM8563_CTL2_TIE BIT(0) > + > +#define HYM8563_SEC 0x02 > +#define HYM8563_SEC_VL BIT(7) > +#define HYM8563_SEC_MASK 0x7f > + > +#define HYM8563_MIN 0x03 > +#define HYM8563_MIN_MASK 0x7f > + > +#define HYM8563_HOUR 0x04 > +#define HYM8563_HOUR_MASK 0x3f > + > +#define HYM8563_DAY 0x05 > +#define HYM8563_DAY_MASK 0x3f > + > +#define HYM8563_WEEKDAY 0x06 > +#define HYM8563_WEEKDAY_MASK 0x07 > + > +#define HYM8563_MONTH 0x07 > +#define HYM8563_MONTH_CENTURY BIT(7) > +#define HYM8563_MONTH_MASK 0x1f > + > +#define HYM8563_YEAR 0x08 > + > +#define HYM8563_ALM_MIN 0x09 > +#define HYM8563_ALM_HOUR 0x0a > +#define HYM8563_ALM_DAY 0x0b > +#define HYM8563_ALM_WEEK 0x0c > + > +/* Each alarm check can be disabled by setting this bit in the register */ > +#define HYM8563_ALM_BIT_DISABLE BIT(7) > + > +#define HYM8563_CLKOUT 0x0d > +#define HYM8563_CLKOUT_DISABLE BIT(7) > +#define HYM8563_CLKOUT_32768 0 > +#define HYM8563_CLKOUT_1024 1 > +#define HYM8563_CLKOUT_32 2 > +#define HYM8563_CLKOUT_1 3 > +#define HYM8563_CLKOUT_MASK 3 > + > +#define HYM8563_TMR_CTL 0x0e > +#define HYM8563_TMR_CTL_ENABLE BIT(7) > +#define HYM8563_TMR_CTL_4096 0 > +#define HYM8563_TMR_CTL_64 1 > +#define HYM8563_TMR_CTL_1 2 > +#define HYM8563_TMR_CTL_1_60 3 > +#define HYM8563_TMR_CTL_MASK 3 > + > +#define HYM8563_TMR_CNT 0x0f > + > +struct hym8563 { > + struct i2c_client *client; > + struct rtc_device *rtc; > + bool valid; > + struct clk_hw clkout_hw; > +}; > + > +/* > + * RTC handling > + */ > + > +static int hym8563_rtc_read_time(struct device *dev, struct rtc_time *tm) > +{ > + struct i2c_client *client = to_i2c_client(dev); > + struct hym8563 *hym8563 = i2c_get_clientdata(client); > + u8 buf[7]; > + int ret; > + > + if (!hym8563->valid) { > + dev_warn(&client->dev, "no valid clock/calendar values available\n"); > + return -EPERM; > + } > + > + ret = i2c_smbus_read_i2c_block_data(client, HYM8563_SEC, 7, buf); > + > + tm->tm_sec = bcd2bin(buf[0] & HYM8563_SEC_MASK); > + tm->tm_min = bcd2bin(buf[1] & HYM8563_MIN_MASK); > + tm->tm_hour = bcd2bin(buf[2] & HYM8563_HOUR_MASK); > + tm->tm_mday = bcd2bin(buf[3] & HYM8563_DAY_MASK); > + tm->tm_wday = bcd2bin(buf[4] & HYM8563_WEEKDAY_MASK); /* 0 = Sun */ > + tm->tm_mon = bcd2bin(buf[5] & HYM8563_MONTH_MASK) - 1; /* 0 = Jan */ > + tm->tm_year = bcd2bin(buf[6]) + 100; > + > + return 0; > +} > + > +static int hym8563_rtc_set_time(struct device *dev, struct rtc_time *tm) > +{ > + struct i2c_client *client = to_i2c_client(dev); > + struct hym8563 *hym8563 = i2c_get_clientdata(client); > + u8 buf[7]; > + int ret; > + > + /* Years >= 2100 are to far in the future, 19XX is to early */ > + if (tm->tm_year < 100 || tm->tm_year >= 200) > + return -EINVAL; > + > + buf[0] = bin2bcd(tm->tm_sec); > + buf[1] = bin2bcd(tm->tm_min); > + buf[2] = bin2bcd(tm->tm_hour); > + buf[3] = bin2bcd(tm->tm_mday); > + buf[4] = bin2bcd(tm->tm_wday); > + buf[5] = bin2bcd(tm->tm_mon + 1); > + > + /* > + * While the HYM8563 has a century flag in the month register, > + * it does not seem to carry it over a subsequent write/read. > + * So we'll limit ourself to 100 years, starting at 2000 for now. > + */ > + buf[6] = tm->tm_year - 100; > + > + /* > + * CTL1 only contains TEST-mode bits apart from stop, > + * so no need to read the value first > + */ > + ret = i2c_smbus_write_byte_data(client, HYM8563_CTL1, > + HYM8563_CTL1_STOP); > + if (ret < 0) > + return ret; > + > + ret = i2c_smbus_write_i2c_block_data(client, HYM8563_SEC, 7, buf); > + if (ret < 0) > + return ret; > + > + ret = i2c_smbus_write_byte_data(client, HYM8563_CTL1, 0); > + if (ret < 0) > + return ret; > + > + hym8563->valid = true; > + > + return 0; > +} > + > +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) > +{ > + struct i2c_client *client = to_i2c_client(dev); > + struct rtc_time *alm_tm = &alm->time; > + u8 buf[4]; > + int ret; > + > + ret = i2c_smbus_read_i2c_block_data(client, HYM8563_ALM_MIN, 4, buf); > + if (ret < 0) > + return ret; > + > + /* The alarm only has a minute accuracy */ > + alm_tm->tm_sec = -1; > + > + alm_tm->tm_min = (buf[0] & HYM8563_ALM_BIT_DISABLE) ? > + -1 : > + bcd2bin(buf[0] & HYM8563_MIN_MASK); > + alm_tm->tm_hour = (buf[1] & HYM8563_ALM_BIT_DISABLE) ? > + -1 : > + bcd2bin(buf[1] & HYM8563_HOUR_MASK); > + alm_tm->tm_mday = (buf[2] & HYM8563_ALM_BIT_DISABLE) ? > + -1 : > + bcd2bin(buf[2] & HYM8563_DAY_MASK); > + alm_tm->tm_wday = (buf[3] & HYM8563_ALM_BIT_DISABLE) ? > + -1 : > + bcd2bin(buf[3] & HYM8563_WEEKDAY_MASK); > + > + alm_tm->tm_mon = -1; > + alm_tm->tm_year = -1; > + > + ret = i2c_smbus_read_byte_data(client, HYM8563_CTL2); > + if (ret < 0) > + return ret; > + > + if (ret & HYM8563_CTL2_AIE) > + alm->enabled = 1; > + > + return 0; > +} > + > +static int hym8563_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alm) > +{ > + struct i2c_client *client = to_i2c_client(dev); > + struct rtc_time *alm_tm = &alm->time; > + u8 buf[4]; > + int ret; > + > + /* > + * The alarm has no seconds so deal with it > + */ > + if (alm_tm->tm_sec) { > + alm_tm->tm_sec = 0; > + alm_tm->tm_min++; > + if (alm_tm->tm_min >= 60) { > + alm_tm->tm_min = 0; > + alm_tm->tm_hour++; > + if (alm_tm->tm_hour >= 24) { > + alm_tm->tm_hour = 0; > + alm_tm->tm_mday++; > + if (alm_tm->tm_mday > 31) > + alm_tm->tm_mday = 0; > + } > + } > + } > + > + ret = i2c_smbus_read_byte_data(client, HYM8563_CTL2); > + if (ret < 0) > + return ret; > + > + ret &= ~HYM8563_CTL2_AIE; > + > + ret = i2c_smbus_write_byte_data(client, HYM8563_CTL2, ret); > + if (ret < 0) > + return ret; > + > + buf[0] = (alm_tm->tm_min < 60 && alm_tm->tm_min >= 0) ? > + bin2bcd(alm_tm->tm_min) : HYM8563_ALM_BIT_DISABLE; > + > + buf[1] = (alm_tm->tm_hour < 24 && alm_tm->tm_hour >= 0) ? > + bin2bcd(alm_tm->tm_hour) : HYM8563_ALM_BIT_DISABLE; > + > + buf[2] = (alm_tm->tm_mday <= 31 && alm_tm->tm_mday >= 1) ? > + bin2bcd(alm_tm->tm_mday) : HYM8563_ALM_BIT_DISABLE; > + > + buf[3] = (alm_tm->tm_wday < 7 && alm_tm->tm_wday >= 0) ? > + bin2bcd(alm_tm->tm_wday) : HYM8563_ALM_BIT_DISABLE; > + > + ret = i2c_smbus_write_i2c_block_data(client, HYM8563_ALM_MIN, 4, buf); > + if (ret < 0) > + return ret; > + > + return hym8563_rtc_alarm_irq_enable(dev, alm->enabled); > +} > + > +static const struct rtc_class_ops hym8563_rtc_ops = { > + .read_time = hym8563_rtc_read_time, > + .set_time = hym8563_rtc_set_time, > + .alarm_irq_enable = hym8563_rtc_alarm_irq_enable, > + .read_alarm = hym8563_rtc_read_alarm, > + .set_alarm = hym8563_rtc_set_alarm, > +}; > + > +/* > + * Handling of the clkout > + */ > + > +#define clkout_hw_to_hym8563(_hw) container_of(_hw, struct hym8563, clkout_hw) > + > +static int clkout_rates[] = { > + 32768, > + 1024, > + 32, > + 1, > +}; > + > +static unsigned long hym8563_clkout_recalc_rate(struct clk_hw *hw, > + unsigned long parent_rate) > +{ > + struct hym8563 *hym8563 = clkout_hw_to_hym8563(hw); > + struct i2c_client *client = hym8563->client; > + int ret = i2c_smbus_read_byte_data(client, HYM8563_CLKOUT); > + > + if (ret < 0 || ret & HYM8563_CLKOUT_DISABLE) > + return 0; > + > + ret &= HYM8563_CLKOUT_MASK; > + return clkout_rates[ret]; > +} > + > +static long hym8563_clkout_round_rate(struct clk_hw *hw, unsigned long rate, > + unsigned long *prate) > +{ > + int i; > + > + for (i = 0; i < ARRAY_SIZE(clkout_rates); i++) > + if (clkout_rates[i] <= rate) > + return clkout_rates[i]; > + > + return 0; > +} > + > +static int hym8563_clkout_set_rate(struct clk_hw *hw, unsigned long rate, > + unsigned long parent_rate) > +{ > + struct hym8563 *hym8563 = clkout_hw_to_hym8563(hw); > + struct i2c_client *client = hym8563->client; > + int ret = i2c_smbus_read_byte_data(client, HYM8563_CLKOUT); > + int i; > + > + if (ret < 0) > + return ret; > + > + for (i = 0; i < ARRAY_SIZE(clkout_rates); i++) > + if (clkout_rates[i] == rate) { > + ret &= ~HYM8563_CLKOUT_MASK; > + ret |= i; > + return i2c_smbus_write_byte_data(client, > + HYM8563_CLKOUT, ret); > + } > + > + return -EINVAL; > +} > + > +static int hym8563_clkout_control(struct clk_hw *hw, bool enable) > +{ > + struct hym8563 *hym8563 = clkout_hw_to_hym8563(hw); > + struct i2c_client *client = hym8563->client; > + int ret = i2c_smbus_read_byte_data(client, HYM8563_CLKOUT); > + > + if (ret < 0) > + return ret; > + > + if (enable) > + ret &= ~HYM8563_CLKOUT_DISABLE; > + else > + ret |= HYM8563_CLKOUT_DISABLE; > + > + return i2c_smbus_write_byte_data(client, HYM8563_CLKOUT, ret); > +} > + > +static int hym8563_clkout_prepare(struct clk_hw *hw) > +{ > + return hym8563_clkout_control(hw, 1); > +} > + > +static void hym8563_clkout_unprepare(struct clk_hw *hw) > +{ > + hym8563_clkout_control(hw, 0); > +} > + > +static int hym8563_clkout_is_prepared(struct clk_hw *hw) > +{ > + struct hym8563 *hym8563 = clkout_hw_to_hym8563(hw); > + struct i2c_client *client = hym8563->client; > + int ret = i2c_smbus_read_byte_data(client, HYM8563_CLKOUT); > + > + if (ret < 0) > + return ret; > + > + return !(ret & HYM8563_CLKOUT_DISABLE); > +} > + > +const struct clk_ops hym8563_clkout_ops = { > + .prepare = hym8563_clkout_prepare, > + .unprepare = hym8563_clkout_unprepare, > + .is_prepared = hym8563_clkout_is_prepared, > + .recalc_rate = hym8563_clkout_recalc_rate, > + .round_rate = hym8563_clkout_round_rate, > + .set_rate = hym8563_clkout_set_rate, > +}; > + > +static struct clk *hym8563_clkout_register_clk(struct hym8563 *hym8563) > +{ > + struct i2c_client *client = hym8563->client; > + struct device_node *node = client->dev.of_node; > + struct clk *clk; > + struct clk_init_data init; > + int ret; > + > + ret = i2c_smbus_write_byte_data(client, HYM8563_CLKOUT, > + HYM8563_CLKOUT_DISABLE); > + if (ret < 0) > + return ERR_PTR(ret); > + > + init.name = "hym8563-clkout"; > + init.ops = &hym8563_clkout_ops; > + init.flags = CLK_IS_ROOT; > + init.parent_names = NULL; > + init.num_parents = 0; > + hym8563->clkout_hw.init = &init; > + > + /* register the clock */ > + clk = clk_register(&client->dev, &hym8563->clkout_hw); > + > + if (!IS_ERR(clk)) > + of_clk_add_provider(node, of_clk_src_simple_get, clk); > + > + return clk; > +} > + > +/* > + * 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) > +{ > + struct hym8563 *hym8563 = (struct hym8563 *)dev_id; > + struct i2c_client *client = hym8563->client; > + struct mutex *lock = &hym8563->rtc->ops_lock; > + int data, ret; > + > + mutex_lock(lock); > + > + /* Clear the alarm flag */ > + > + data = i2c_smbus_read_byte_data(client, HYM8563_CTL2); > + if (data < 0) { > + dev_err(&client->dev, "%s: error reading i2c data %d\n", > + __func__, data); > + goto out; > + } > + > + data &= ~HYM8563_CTL2_AF; > + > + ret = i2c_smbus_write_byte_data(client, HYM8563_CTL2, data); > + if (ret < 0) { > + dev_err(&client->dev, "%s: error writing i2c data %d\n", > + __func__, ret); > + } > + > +out: > + mutex_unlock(lock); > + return IRQ_HANDLED; > +} > + > +static int hym8563_init_device(struct i2c_client *client) > +{ > + int ret; > + > + /* Clear stop flag if present */ > + ret = i2c_smbus_write_byte_data(client, HYM8563_CTL1, 0); > + if (ret < 0) > + return ret; > + > + ret = i2c_smbus_read_byte_data(client, HYM8563_CTL2); > + if (ret < 0) > + return ret; > + > + /* Disable alarm and timer interrupts */ > + ret &= ~HYM8563_CTL2_AIE; > + ret &= ~HYM8563_CTL2_TIE; > + > + /* Clear any pending alarm and timer flags */ > + if (ret & HYM8563_CTL2_AF) > + ret &= ~HYM8563_CTL2_AF; > + > + if (ret & HYM8563_CTL2_TF) > + ret &= ~HYM8563_CTL2_TF; > + > + ret &= ~HYM8563_CTL2_TI_TP; > + > + return i2c_smbus_write_byte_data(client, HYM8563_CTL2, ret); > +} > + > +#ifdef CONFIG_PM_SLEEP > +static int hym8563_suspend(struct device *dev) > +{ > + struct i2c_client *client = to_i2c_client(dev); > + int ret; > + > + if (device_may_wakeup(dev)) { > + ret = enable_irq_wake(client->irq); > + if (ret) { > + dev_err(dev, "enable_irq_wake failed, %d\n", ret); > + return ret; > + } > + } > + > + return 0; > +} > + > +static int hym8563_resume(struct device *dev) > +{ > + struct i2c_client *client = to_i2c_client(dev); > + > + if (device_may_wakeup(dev)) > + disable_irq_wake(client->irq); > + > + return 0; > +} > +#endif > + > +static SIMPLE_DEV_PM_OPS(hym8563_pm_ops, hym8563_suspend, hym8563_resume); > + > +static int hym8563_probe(struct i2c_client *client, > + const struct i2c_device_id *id) > +{ > + struct hym8563 *hym8563; > + int ret, gpio_int; > + > + hym8563 = devm_kzalloc(&client->dev, sizeof(hym8563), GFP_KERNEL); Shouldn't this be sizeof(*hym8563)? > + if (!hym8563) > + return -ENOMEM; > + > + hym8563->client = client; > + i2c_set_clientdata(client, hym8563); > + > + device_set_wakeup_capable(&client->dev, true); > + > + gpio_int = of_get_gpio(client->dev.of_node, 0); > + if (!gpio_is_valid(gpio_int)) { > + dev_err(&client->dev, "failed to get interrupt gpio\n"); > + return -EINVAL; > + } > + > + ret = devm_gpio_request_one(&client->dev, gpio_int, > + GPIOF_DIR_IN, "hym8563_int"); > + if (ret) { > + dev_err(&client->dev, "request of gpio %d failed, %d\n", > + gpio_int, ret); > + return ret; > + } > + > + client->irq = gpio_to_irq(gpio_int); > + if (client->irq < 0) { > + dev_err(&client->dev, "could not get irq of gpio %d, %d\n", > + gpio_int, client->irq); > + return client->irq; > + } > + > + ret = hym8563_init_device(client); > + if (ret) { > + dev_err(&client->dev, "could not init device, %d\n", ret); > + return ret; > + } > + > + ret = devm_request_threaded_irq(&client->dev, client->irq, > + NULL, hym8563_irq, > + IRQF_TRIGGER_LOW | IRQF_ONESHOT, > + client->name, hym8563); > + if (ret < 0) { > + dev_err(&client->dev, "irq %d request failed, %d\n", > + client->irq, ret); > + return ret; > + } > + > + /* check state of calendar information */ > + ret = i2c_smbus_read_byte_data(client, HYM8563_SEC); > + if (ret < 0) > + return ret; > + > + hym8563->valid = !(ret & HYM8563_SEC_VL); > + dev_dbg(&client->dev, "rtc information is %s\n", > + hym8563->valid ? "valid" : "invalid"); > + > + hym8563->rtc = devm_rtc_device_register(&client->dev, client->name, > + &hym8563_rtc_ops, THIS_MODULE); > + if (IS_ERR(hym8563->rtc)) > + return PTR_ERR(hym8563->rtc); > + > + if (IS_ENABLED(CONFIG_COMMON_CLK)) > + hym8563_clkout_register_clk(hym8563); > + > + return 0; > +} > + > +static const struct i2c_device_id hym8563_id[] = { > + { "hym8563", 0 }, > + {}, > +}; > +MODULE_DEVICE_TABLE(i2c, hym8563_id); > + > +static struct of_device_id hym8563_dt_idtable[] = { > + { .compatible = "haoyu,hym8563" }, > + {}, > +}; > +MODULE_DEVICE_TABLE(of, hym8563_dt_idtable); > + > +static struct i2c_driver hym8563_driver = { > + .driver = { > + .name = "rtc-hym8563", > + .owner = THIS_MODULE, > + .pm = &hym8563_pm_ops, > + .of_match_table = of_match_ptr(hym8563_dt_idtable), > + }, > + .probe = hym8563_probe, > + .id_table = hym8563_id, > +}; > + > +module_i2c_driver(hym8563_driver); > + > +MODULE_AUTHOR("Heiko Stuebner <heiko-4mtYJXux2i+zQB+pC5nmwQ@public.gmane.org>"); > +MODULE_DESCRIPTION("HYM8563 RTC driver"); > +MODULE_LICENSE("GPL"); > -- > 1.7.10.4 > > -- > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ -- Thanks, //richard -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html ^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [PATCH v2 2/2] rtc: add hym8563 rtc-driver @ 2013-12-01 14:38 ` Richard Weinberger 0 siblings, 0 replies; 8+ messages in thread From: Richard Weinberger @ 2013-12-01 14:38 UTC (permalink / raw) To: Heiko Stübner Cc: Alessandro Zummo, Rob Herring, Pawel Moll, Mark Rutland, Stephen Warren, Ian Campbell, devicetree, Grant Likely, LKML, rtc-linux, Mike Turquette On Sun, Dec 1, 2013 at 2:39 PM, Heiko Stübner <heiko@sntech.de> wrote: > The Haoyu Microelectronics HYM8563 provides rtc- and alarm functions > as well as a clock output of up to 32kHz. > > Signed-off-by: Heiko Stuebner <heiko@sntech.de> > --- > drivers/rtc/Kconfig | 11 + > drivers/rtc/Makefile | 1 + > drivers/rtc/rtc-hym8563.c | 626 +++++++++++++++++++++++++++++++++++++++++++++ > 3 files changed, 638 insertions(+) > create mode 100644 drivers/rtc/rtc-hym8563.c > > diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig > index 9654aa3..bf2c572 100644 > --- a/drivers/rtc/Kconfig > +++ b/drivers/rtc/Kconfig > @@ -202,6 +202,17 @@ config RTC_DRV_DS3232 > This driver can also be built as a module. If so, the module > will be called rtc-ds3232. > > +config RTC_DRV_HYM8563 > + tristate "Haoyu Microelectronics HYM8563" > + depends on I2C && OF && GPIOLIB > + help > + Say Y to enable support for the HYM8563 I2C RTC chip. Apart > + from the usual rtc functions it provides a clock output of > + up to 32kHz. > + > + This driver can also be built as a module. If so, the module > + will be called rtc-hym8563. > + > config RTC_DRV_LP8788 > tristate "TI LP8788 RTC driver" > depends on MFD_LP8788 > diff --git a/drivers/rtc/Makefile b/drivers/rtc/Makefile > index 2dff3d2..92f9d2c 100644 > --- a/drivers/rtc/Makefile > +++ b/drivers/rtc/Makefile > @@ -54,6 +54,7 @@ obj-$(CONFIG_RTC_DRV_EP93XX) += rtc-ep93xx.o > obj-$(CONFIG_RTC_DRV_FM3130) += rtc-fm3130.o > obj-$(CONFIG_RTC_DRV_GENERIC) += rtc-generic.o > obj-$(CONFIG_RTC_DRV_HID_SENSOR_TIME) += rtc-hid-sensor-time.o > +obj-$(CONFIG_RTC_DRV_HYM8563) += rtc-hym8563.o > obj-$(CONFIG_RTC_DRV_IMXDI) += rtc-imxdi.o > obj-$(CONFIG_RTC_DRV_ISL1208) += rtc-isl1208.o > obj-$(CONFIG_RTC_DRV_ISL12022) += rtc-isl12022.o > diff --git a/drivers/rtc/rtc-hym8563.c b/drivers/rtc/rtc-hym8563.c > new file mode 100644 > index 0000000..2dc4154 > --- /dev/null > +++ b/drivers/rtc/rtc-hym8563.c > @@ -0,0 +1,626 @@ > +/* > + * Haoyu HYM8563 RTC driver > + * > + * Copyright (C) 2013 MundoReader S.L. > + * Author: Heiko Stuebner <heiko@sntech.de> > + * > + * based on rtc-HYM8563 > + * Copyright (C) 2010 ROCKCHIP, Inc. > + * > + * This software is licensed under the terms of the GNU General Public > + * License version 2, as published by the Free Software Foundation, and > + * may be copied, distributed, and modified under those terms. > + * > + * This program is distributed in the hope that it will be useful, > + * but WITHOUT ANY WARRANTY; without even the implied warranty of > + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the > + * GNU General Public License for more details. > + */ > + > +#include <linux/module.h> > +#include <linux/clk-provider.h> > +#include <linux/i2c.h> > +#include <linux/bcd.h> > +#include <linux/rtc.h> > +#include <linux/delay.h> > +#include <linux/slab.h> > +#include <linux/gpio.h> > +#include <linux/of_gpio.h> > + > +#define HYM8563_CTL1 0x00 > +#define HYM8563_CTL1_TEST BIT(7) > +#define HYM8563_CTL1_STOP BIT(5) > +#define HYM8563_CTL1_TESTC BIT(3) > + > +#define HYM8563_CTL2 0x01 > +#define HYM8563_CTL2_TI_TP BIT(4) > +#define HYM8563_CTL2_AF BIT(3) > +#define HYM8563_CTL2_TF BIT(2) > +#define HYM8563_CTL2_AIE BIT(1) > +#define HYM8563_CTL2_TIE BIT(0) > + > +#define HYM8563_SEC 0x02 > +#define HYM8563_SEC_VL BIT(7) > +#define HYM8563_SEC_MASK 0x7f > + > +#define HYM8563_MIN 0x03 > +#define HYM8563_MIN_MASK 0x7f > + > +#define HYM8563_HOUR 0x04 > +#define HYM8563_HOUR_MASK 0x3f > + > +#define HYM8563_DAY 0x05 > +#define HYM8563_DAY_MASK 0x3f > + > +#define HYM8563_WEEKDAY 0x06 > +#define HYM8563_WEEKDAY_MASK 0x07 > + > +#define HYM8563_MONTH 0x07 > +#define HYM8563_MONTH_CENTURY BIT(7) > +#define HYM8563_MONTH_MASK 0x1f > + > +#define HYM8563_YEAR 0x08 > + > +#define HYM8563_ALM_MIN 0x09 > +#define HYM8563_ALM_HOUR 0x0a > +#define HYM8563_ALM_DAY 0x0b > +#define HYM8563_ALM_WEEK 0x0c > + > +/* Each alarm check can be disabled by setting this bit in the register */ > +#define HYM8563_ALM_BIT_DISABLE BIT(7) > + > +#define HYM8563_CLKOUT 0x0d > +#define HYM8563_CLKOUT_DISABLE BIT(7) > +#define HYM8563_CLKOUT_32768 0 > +#define HYM8563_CLKOUT_1024 1 > +#define HYM8563_CLKOUT_32 2 > +#define HYM8563_CLKOUT_1 3 > +#define HYM8563_CLKOUT_MASK 3 > + > +#define HYM8563_TMR_CTL 0x0e > +#define HYM8563_TMR_CTL_ENABLE BIT(7) > +#define HYM8563_TMR_CTL_4096 0 > +#define HYM8563_TMR_CTL_64 1 > +#define HYM8563_TMR_CTL_1 2 > +#define HYM8563_TMR_CTL_1_60 3 > +#define HYM8563_TMR_CTL_MASK 3 > + > +#define HYM8563_TMR_CNT 0x0f > + > +struct hym8563 { > + struct i2c_client *client; > + struct rtc_device *rtc; > + bool valid; > + struct clk_hw clkout_hw; > +}; > + > +/* > + * RTC handling > + */ > + > +static int hym8563_rtc_read_time(struct device *dev, struct rtc_time *tm) > +{ > + struct i2c_client *client = to_i2c_client(dev); > + struct hym8563 *hym8563 = i2c_get_clientdata(client); > + u8 buf[7]; > + int ret; > + > + if (!hym8563->valid) { > + dev_warn(&client->dev, "no valid clock/calendar values available\n"); > + return -EPERM; > + } > + > + ret = i2c_smbus_read_i2c_block_data(client, HYM8563_SEC, 7, buf); > + > + tm->tm_sec = bcd2bin(buf[0] & HYM8563_SEC_MASK); > + tm->tm_min = bcd2bin(buf[1] & HYM8563_MIN_MASK); > + tm->tm_hour = bcd2bin(buf[2] & HYM8563_HOUR_MASK); > + tm->tm_mday = bcd2bin(buf[3] & HYM8563_DAY_MASK); > + tm->tm_wday = bcd2bin(buf[4] & HYM8563_WEEKDAY_MASK); /* 0 = Sun */ > + tm->tm_mon = bcd2bin(buf[5] & HYM8563_MONTH_MASK) - 1; /* 0 = Jan */ > + tm->tm_year = bcd2bin(buf[6]) + 100; > + > + return 0; > +} > + > +static int hym8563_rtc_set_time(struct device *dev, struct rtc_time *tm) > +{ > + struct i2c_client *client = to_i2c_client(dev); > + struct hym8563 *hym8563 = i2c_get_clientdata(client); > + u8 buf[7]; > + int ret; > + > + /* Years >= 2100 are to far in the future, 19XX is to early */ > + if (tm->tm_year < 100 || tm->tm_year >= 200) > + return -EINVAL; > + > + buf[0] = bin2bcd(tm->tm_sec); > + buf[1] = bin2bcd(tm->tm_min); > + buf[2] = bin2bcd(tm->tm_hour); > + buf[3] = bin2bcd(tm->tm_mday); > + buf[4] = bin2bcd(tm->tm_wday); > + buf[5] = bin2bcd(tm->tm_mon + 1); > + > + /* > + * While the HYM8563 has a century flag in the month register, > + * it does not seem to carry it over a subsequent write/read. > + * So we'll limit ourself to 100 years, starting at 2000 for now. > + */ > + buf[6] = tm->tm_year - 100; > + > + /* > + * CTL1 only contains TEST-mode bits apart from stop, > + * so no need to read the value first > + */ > + ret = i2c_smbus_write_byte_data(client, HYM8563_CTL1, > + HYM8563_CTL1_STOP); > + if (ret < 0) > + return ret; > + > + ret = i2c_smbus_write_i2c_block_data(client, HYM8563_SEC, 7, buf); > + if (ret < 0) > + return ret; > + > + ret = i2c_smbus_write_byte_data(client, HYM8563_CTL1, 0); > + if (ret < 0) > + return ret; > + > + hym8563->valid = true; > + > + return 0; > +} > + > +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) > +{ > + struct i2c_client *client = to_i2c_client(dev); > + struct rtc_time *alm_tm = &alm->time; > + u8 buf[4]; > + int ret; > + > + ret = i2c_smbus_read_i2c_block_data(client, HYM8563_ALM_MIN, 4, buf); > + if (ret < 0) > + return ret; > + > + /* The alarm only has a minute accuracy */ > + alm_tm->tm_sec = -1; > + > + alm_tm->tm_min = (buf[0] & HYM8563_ALM_BIT_DISABLE) ? > + -1 : > + bcd2bin(buf[0] & HYM8563_MIN_MASK); > + alm_tm->tm_hour = (buf[1] & HYM8563_ALM_BIT_DISABLE) ? > + -1 : > + bcd2bin(buf[1] & HYM8563_HOUR_MASK); > + alm_tm->tm_mday = (buf[2] & HYM8563_ALM_BIT_DISABLE) ? > + -1 : > + bcd2bin(buf[2] & HYM8563_DAY_MASK); > + alm_tm->tm_wday = (buf[3] & HYM8563_ALM_BIT_DISABLE) ? > + -1 : > + bcd2bin(buf[3] & HYM8563_WEEKDAY_MASK); > + > + alm_tm->tm_mon = -1; > + alm_tm->tm_year = -1; > + > + ret = i2c_smbus_read_byte_data(client, HYM8563_CTL2); > + if (ret < 0) > + return ret; > + > + if (ret & HYM8563_CTL2_AIE) > + alm->enabled = 1; > + > + return 0; > +} > + > +static int hym8563_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alm) > +{ > + struct i2c_client *client = to_i2c_client(dev); > + struct rtc_time *alm_tm = &alm->time; > + u8 buf[4]; > + int ret; > + > + /* > + * The alarm has no seconds so deal with it > + */ > + if (alm_tm->tm_sec) { > + alm_tm->tm_sec = 0; > + alm_tm->tm_min++; > + if (alm_tm->tm_min >= 60) { > + alm_tm->tm_min = 0; > + alm_tm->tm_hour++; > + if (alm_tm->tm_hour >= 24) { > + alm_tm->tm_hour = 0; > + alm_tm->tm_mday++; > + if (alm_tm->tm_mday > 31) > + alm_tm->tm_mday = 0; > + } > + } > + } > + > + ret = i2c_smbus_read_byte_data(client, HYM8563_CTL2); > + if (ret < 0) > + return ret; > + > + ret &= ~HYM8563_CTL2_AIE; > + > + ret = i2c_smbus_write_byte_data(client, HYM8563_CTL2, ret); > + if (ret < 0) > + return ret; > + > + buf[0] = (alm_tm->tm_min < 60 && alm_tm->tm_min >= 0) ? > + bin2bcd(alm_tm->tm_min) : HYM8563_ALM_BIT_DISABLE; > + > + buf[1] = (alm_tm->tm_hour < 24 && alm_tm->tm_hour >= 0) ? > + bin2bcd(alm_tm->tm_hour) : HYM8563_ALM_BIT_DISABLE; > + > + buf[2] = (alm_tm->tm_mday <= 31 && alm_tm->tm_mday >= 1) ? > + bin2bcd(alm_tm->tm_mday) : HYM8563_ALM_BIT_DISABLE; > + > + buf[3] = (alm_tm->tm_wday < 7 && alm_tm->tm_wday >= 0) ? > + bin2bcd(alm_tm->tm_wday) : HYM8563_ALM_BIT_DISABLE; > + > + ret = i2c_smbus_write_i2c_block_data(client, HYM8563_ALM_MIN, 4, buf); > + if (ret < 0) > + return ret; > + > + return hym8563_rtc_alarm_irq_enable(dev, alm->enabled); > +} > + > +static const struct rtc_class_ops hym8563_rtc_ops = { > + .read_time = hym8563_rtc_read_time, > + .set_time = hym8563_rtc_set_time, > + .alarm_irq_enable = hym8563_rtc_alarm_irq_enable, > + .read_alarm = hym8563_rtc_read_alarm, > + .set_alarm = hym8563_rtc_set_alarm, > +}; > + > +/* > + * Handling of the clkout > + */ > + > +#define clkout_hw_to_hym8563(_hw) container_of(_hw, struct hym8563, clkout_hw) > + > +static int clkout_rates[] = { > + 32768, > + 1024, > + 32, > + 1, > +}; > + > +static unsigned long hym8563_clkout_recalc_rate(struct clk_hw *hw, > + unsigned long parent_rate) > +{ > + struct hym8563 *hym8563 = clkout_hw_to_hym8563(hw); > + struct i2c_client *client = hym8563->client; > + int ret = i2c_smbus_read_byte_data(client, HYM8563_CLKOUT); > + > + if (ret < 0 || ret & HYM8563_CLKOUT_DISABLE) > + return 0; > + > + ret &= HYM8563_CLKOUT_MASK; > + return clkout_rates[ret]; > +} > + > +static long hym8563_clkout_round_rate(struct clk_hw *hw, unsigned long rate, > + unsigned long *prate) > +{ > + int i; > + > + for (i = 0; i < ARRAY_SIZE(clkout_rates); i++) > + if (clkout_rates[i] <= rate) > + return clkout_rates[i]; > + > + return 0; > +} > + > +static int hym8563_clkout_set_rate(struct clk_hw *hw, unsigned long rate, > + unsigned long parent_rate) > +{ > + struct hym8563 *hym8563 = clkout_hw_to_hym8563(hw); > + struct i2c_client *client = hym8563->client; > + int ret = i2c_smbus_read_byte_data(client, HYM8563_CLKOUT); > + int i; > + > + if (ret < 0) > + return ret; > + > + for (i = 0; i < ARRAY_SIZE(clkout_rates); i++) > + if (clkout_rates[i] == rate) { > + ret &= ~HYM8563_CLKOUT_MASK; > + ret |= i; > + return i2c_smbus_write_byte_data(client, > + HYM8563_CLKOUT, ret); > + } > + > + return -EINVAL; > +} > + > +static int hym8563_clkout_control(struct clk_hw *hw, bool enable) > +{ > + struct hym8563 *hym8563 = clkout_hw_to_hym8563(hw); > + struct i2c_client *client = hym8563->client; > + int ret = i2c_smbus_read_byte_data(client, HYM8563_CLKOUT); > + > + if (ret < 0) > + return ret; > + > + if (enable) > + ret &= ~HYM8563_CLKOUT_DISABLE; > + else > + ret |= HYM8563_CLKOUT_DISABLE; > + > + return i2c_smbus_write_byte_data(client, HYM8563_CLKOUT, ret); > +} > + > +static int hym8563_clkout_prepare(struct clk_hw *hw) > +{ > + return hym8563_clkout_control(hw, 1); > +} > + > +static void hym8563_clkout_unprepare(struct clk_hw *hw) > +{ > + hym8563_clkout_control(hw, 0); > +} > + > +static int hym8563_clkout_is_prepared(struct clk_hw *hw) > +{ > + struct hym8563 *hym8563 = clkout_hw_to_hym8563(hw); > + struct i2c_client *client = hym8563->client; > + int ret = i2c_smbus_read_byte_data(client, HYM8563_CLKOUT); > + > + if (ret < 0) > + return ret; > + > + return !(ret & HYM8563_CLKOUT_DISABLE); > +} > + > +const struct clk_ops hym8563_clkout_ops = { > + .prepare = hym8563_clkout_prepare, > + .unprepare = hym8563_clkout_unprepare, > + .is_prepared = hym8563_clkout_is_prepared, > + .recalc_rate = hym8563_clkout_recalc_rate, > + .round_rate = hym8563_clkout_round_rate, > + .set_rate = hym8563_clkout_set_rate, > +}; > + > +static struct clk *hym8563_clkout_register_clk(struct hym8563 *hym8563) > +{ > + struct i2c_client *client = hym8563->client; > + struct device_node *node = client->dev.of_node; > + struct clk *clk; > + struct clk_init_data init; > + int ret; > + > + ret = i2c_smbus_write_byte_data(client, HYM8563_CLKOUT, > + HYM8563_CLKOUT_DISABLE); > + if (ret < 0) > + return ERR_PTR(ret); > + > + init.name = "hym8563-clkout"; > + init.ops = &hym8563_clkout_ops; > + init.flags = CLK_IS_ROOT; > + init.parent_names = NULL; > + init.num_parents = 0; > + hym8563->clkout_hw.init = &init; > + > + /* register the clock */ > + clk = clk_register(&client->dev, &hym8563->clkout_hw); > + > + if (!IS_ERR(clk)) > + of_clk_add_provider(node, of_clk_src_simple_get, clk); > + > + return clk; > +} > + > +/* > + * 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) > +{ > + struct hym8563 *hym8563 = (struct hym8563 *)dev_id; > + struct i2c_client *client = hym8563->client; > + struct mutex *lock = &hym8563->rtc->ops_lock; > + int data, ret; > + > + mutex_lock(lock); > + > + /* Clear the alarm flag */ > + > + data = i2c_smbus_read_byte_data(client, HYM8563_CTL2); > + if (data < 0) { > + dev_err(&client->dev, "%s: error reading i2c data %d\n", > + __func__, data); > + goto out; > + } > + > + data &= ~HYM8563_CTL2_AF; > + > + ret = i2c_smbus_write_byte_data(client, HYM8563_CTL2, data); > + if (ret < 0) { > + dev_err(&client->dev, "%s: error writing i2c data %d\n", > + __func__, ret); > + } > + > +out: > + mutex_unlock(lock); > + return IRQ_HANDLED; > +} > + > +static int hym8563_init_device(struct i2c_client *client) > +{ > + int ret; > + > + /* Clear stop flag if present */ > + ret = i2c_smbus_write_byte_data(client, HYM8563_CTL1, 0); > + if (ret < 0) > + return ret; > + > + ret = i2c_smbus_read_byte_data(client, HYM8563_CTL2); > + if (ret < 0) > + return ret; > + > + /* Disable alarm and timer interrupts */ > + ret &= ~HYM8563_CTL2_AIE; > + ret &= ~HYM8563_CTL2_TIE; > + > + /* Clear any pending alarm and timer flags */ > + if (ret & HYM8563_CTL2_AF) > + ret &= ~HYM8563_CTL2_AF; > + > + if (ret & HYM8563_CTL2_TF) > + ret &= ~HYM8563_CTL2_TF; > + > + ret &= ~HYM8563_CTL2_TI_TP; > + > + return i2c_smbus_write_byte_data(client, HYM8563_CTL2, ret); > +} > + > +#ifdef CONFIG_PM_SLEEP > +static int hym8563_suspend(struct device *dev) > +{ > + struct i2c_client *client = to_i2c_client(dev); > + int ret; > + > + if (device_may_wakeup(dev)) { > + ret = enable_irq_wake(client->irq); > + if (ret) { > + dev_err(dev, "enable_irq_wake failed, %d\n", ret); > + return ret; > + } > + } > + > + return 0; > +} > + > +static int hym8563_resume(struct device *dev) > +{ > + struct i2c_client *client = to_i2c_client(dev); > + > + if (device_may_wakeup(dev)) > + disable_irq_wake(client->irq); > + > + return 0; > +} > +#endif > + > +static SIMPLE_DEV_PM_OPS(hym8563_pm_ops, hym8563_suspend, hym8563_resume); > + > +static int hym8563_probe(struct i2c_client *client, > + const struct i2c_device_id *id) > +{ > + struct hym8563 *hym8563; > + int ret, gpio_int; > + > + hym8563 = devm_kzalloc(&client->dev, sizeof(hym8563), GFP_KERNEL); Shouldn't this be sizeof(*hym8563)? > + if (!hym8563) > + return -ENOMEM; > + > + hym8563->client = client; > + i2c_set_clientdata(client, hym8563); > + > + device_set_wakeup_capable(&client->dev, true); > + > + gpio_int = of_get_gpio(client->dev.of_node, 0); > + if (!gpio_is_valid(gpio_int)) { > + dev_err(&client->dev, "failed to get interrupt gpio\n"); > + return -EINVAL; > + } > + > + ret = devm_gpio_request_one(&client->dev, gpio_int, > + GPIOF_DIR_IN, "hym8563_int"); > + if (ret) { > + dev_err(&client->dev, "request of gpio %d failed, %d\n", > + gpio_int, ret); > + return ret; > + } > + > + client->irq = gpio_to_irq(gpio_int); > + if (client->irq < 0) { > + dev_err(&client->dev, "could not get irq of gpio %d, %d\n", > + gpio_int, client->irq); > + return client->irq; > + } > + > + ret = hym8563_init_device(client); > + if (ret) { > + dev_err(&client->dev, "could not init device, %d\n", ret); > + return ret; > + } > + > + ret = devm_request_threaded_irq(&client->dev, client->irq, > + NULL, hym8563_irq, > + IRQF_TRIGGER_LOW | IRQF_ONESHOT, > + client->name, hym8563); > + if (ret < 0) { > + dev_err(&client->dev, "irq %d request failed, %d\n", > + client->irq, ret); > + return ret; > + } > + > + /* check state of calendar information */ > + ret = i2c_smbus_read_byte_data(client, HYM8563_SEC); > + if (ret < 0) > + return ret; > + > + hym8563->valid = !(ret & HYM8563_SEC_VL); > + dev_dbg(&client->dev, "rtc information is %s\n", > + hym8563->valid ? "valid" : "invalid"); > + > + hym8563->rtc = devm_rtc_device_register(&client->dev, client->name, > + &hym8563_rtc_ops, THIS_MODULE); > + if (IS_ERR(hym8563->rtc)) > + return PTR_ERR(hym8563->rtc); > + > + if (IS_ENABLED(CONFIG_COMMON_CLK)) > + hym8563_clkout_register_clk(hym8563); > + > + return 0; > +} > + > +static const struct i2c_device_id hym8563_id[] = { > + { "hym8563", 0 }, > + {}, > +}; > +MODULE_DEVICE_TABLE(i2c, hym8563_id); > + > +static struct of_device_id hym8563_dt_idtable[] = { > + { .compatible = "haoyu,hym8563" }, > + {}, > +}; > +MODULE_DEVICE_TABLE(of, hym8563_dt_idtable); > + > +static struct i2c_driver hym8563_driver = { > + .driver = { > + .name = "rtc-hym8563", > + .owner = THIS_MODULE, > + .pm = &hym8563_pm_ops, > + .of_match_table = of_match_ptr(hym8563_dt_idtable), > + }, > + .probe = hym8563_probe, > + .id_table = hym8563_id, > +}; > + > +module_i2c_driver(hym8563_driver); > + > +MODULE_AUTHOR("Heiko Stuebner <heiko@sntech.de>"); > +MODULE_DESCRIPTION("HYM8563 RTC driver"); > +MODULE_LICENSE("GPL"); > -- > 1.7.10.4 > > -- > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ -- Thanks, //richard ^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [PATCH v2 2/2] rtc: add hym8563 rtc-driver 2013-12-01 14:38 ` Richard Weinberger (?) @ 2013-12-01 17:19 ` Heiko Stübner -1 siblings, 0 replies; 8+ messages in thread From: Heiko Stübner @ 2013-12-01 17:19 UTC (permalink / raw) To: Richard Weinberger Cc: Alessandro Zummo, Rob Herring, Pawel Moll, Mark Rutland, Stephen Warren, Ian Campbell, devicetree, Grant Likely, LKML, rtc-linux, Mike Turquette Am Sonntag, 1. Dezember 2013, 15:38:40 schrieb Richard Weinberger: > On Sun, Dec 1, 2013 at 2:39 PM, Heiko Stübner <heiko@sntech.de> wrote: > > +static int hym8563_probe(struct i2c_client *client, > > + const struct i2c_device_id *id) > > +{ > > + struct hym8563 *hym8563; > > + int ret, gpio_int; > > + > > + hym8563 = devm_kzalloc(&client->dev, sizeof(hym8563), > > GFP_KERNEL); > > Shouldn't this be sizeof(*hym8563)? you're right of course, thanks for catching the missing "*", I'll send a v3 shortly. Heiko ^ permalink raw reply [flat|nested] 8+ messages in thread
end of thread, other threads:[~2013-12-01 17:19 UTC | newest]
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2013-12-01 13:37 [PATCH v2 0/2] Add support for hym8563 rtcs Heiko Stübner
2013-12-01 13:37 ` Heiko Stübner
[not found] ` <201312011437.47432.heiko-4mtYJXux2i+zQB+pC5nmwQ@public.gmane.org>
2013-12-01 13:38 ` [PATCH v2 1/2] dt-bindings: add hym8563 binding Heiko Stübner
2013-12-01 13:38 ` Heiko Stübner
2013-12-01 13:39 ` [PATCH v2 2/2] rtc: add hym8563 rtc-driver Heiko Stübner
[not found] ` <201312011439.45417.heiko-4mtYJXux2i+zQB+pC5nmwQ@public.gmane.org>
2013-12-01 14:38 ` Richard Weinberger
2013-12-01 14:38 ` Richard Weinberger
2013-12-01 17:19 ` Heiko Stübner
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