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Message-ID: <20150417161555.GB27440@dtor-ws>
Date: Fri, 17 Apr 2015 09:15:55 -0700
From: Dmitry Torokhov <dmitry.torokhov@...il.com>
To: S Twiss <stwiss.opensource@...semi.com>
Cc: Lee Jones <lee.jones@...aro.org>,
Samuel Ortiz <sameo@...ux.intel.com>,
DT <devicetree@...r.kernel.org>,
David Dajun Chen <david.chen@...semi.com>,
INPUT <linux-input@...r.kernel.org>,
Ian Campbell <ijc+devicetree@...lion.org.uk>,
Kumar Gala <galak@...eaurora.org>,
LKML <linux-kernel@...r.kernel.org>,
Mark Rutland <mark.rutland@....com>,
Pawel Moll <pawel.moll@....com>,
Rob Herring <robh+dt@...nel.org>,
Support Opensource <support.opensource@...semi.com>
Subject: Re: [RESEND PATCH V2 1/2] input: misc: da9063: OnKey driver
On Fri, Apr 17, 2015 at 01:03:20PM +0100, S Twiss wrote:
> From: Steve Twiss <stwiss.opensource@...semi.com>
>
> Add OnKey driver support for DA9063
>
Isn't this almost to the letter identical to da9062 that I just looked
at? Please find a way to not make a brand new driver for the slightest
variation of the chip...
Thanks.
>
> Signed-off-by: Steve Twiss <stwiss.opensource@...semi.com>
>
> ---
> Changes from PATCH V1 to V2
> ---------------------------
> - Remove the circular dependency comment in the main e-mail body
> linking PATCH V1 1/2 and 2/2
> - Alter the copyright header information to match expected GPLv2
> text from http://www.gnu.org/licenses/gpl-2.0.html
>
> This patch applies against linux-next and v4.0-rc6
>
>
> MAINTAINERS | 2 +-
> drivers/input/misc/Kconfig | 10 ++
> drivers/input/misc/Makefile | 1 +
> drivers/input/misc/da9063-onkey.c | 228 ++++++++++++++++++++++++++++++++++++++
> drivers/mfd/da9063-core.c | 55 +++++++++
> include/linux/mfd/da9063/pdata.h | 1 +
> 6 files changed, 296 insertions(+), 1 deletion(-)
> create mode 100644 drivers/input/misc/da9063-onkey.c
>
> diff --git a/MAINTAINERS b/MAINTAINERS
> index 1de6afa..97e20cf 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -3138,7 +3138,7 @@ S: Supported
> F: Documentation/hwmon/da90??
> F: drivers/gpio/gpio-da90??.c
> F: drivers/hwmon/da90??-hwmon.c
> -F: drivers/input/misc/da90??_onkey.c
> +F: drivers/input/misc/da90???onkey.c
> F: drivers/input/touchscreen/da9052_tsi.c
> F: drivers/leds/leds-da90??.c
> F: drivers/mfd/da903x.c
> diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig
> index 6deb8da..9d7a79d 100644
> --- a/drivers/input/misc/Kconfig
> +++ b/drivers/input/misc/Kconfig
> @@ -586,6 +586,16 @@ config INPUT_DA9055_ONKEY
> To compile this driver as a module, choose M here: the module
> will be called da9055_onkey.
>
> +config INPUT_DA9063_ONKEY
> + tristate "Dialog DA9063 OnKey"
> + depends on MFD_DA9063
> + help
> + Support the ONKEY of Dialog DA9063 Power Management IC as an
> + input device reporting power button statue.
> +
> + To compile this driver as a module, choose M here: the module
> + will be called da9063-onkey.
> +
> config INPUT_DM355EVM
> tristate "TI DaVinci DM355 EVM Keypad and IR Remote"
> depends on MFD_DM355EVM_MSP
> diff --git a/drivers/input/misc/Makefile b/drivers/input/misc/Makefile
> index 403a1a5..50ae57e 100644
> --- a/drivers/input/misc/Makefile
> +++ b/drivers/input/misc/Makefile
> @@ -25,6 +25,7 @@ obj-$(CONFIG_INPUT_CMA3000_I2C) += cma3000_d0x_i2c.o
> obj-$(CONFIG_INPUT_COBALT_BTNS) += cobalt_btns.o
> obj-$(CONFIG_INPUT_DA9052_ONKEY) += da9052_onkey.o
> obj-$(CONFIG_INPUT_DA9055_ONKEY) += da9055_onkey.o
> +obj-$(CONFIG_INPUT_DA9063_ONKEY) += da9063-onkey.o
> obj-$(CONFIG_INPUT_DM355EVM) += dm355evm_keys.o
> obj-$(CONFIG_INPUT_E3X0_BUTTON) += e3x0-button.o
> obj-$(CONFIG_INPUT_DRV260X_HAPTICS) += drv260x.o
> diff --git a/drivers/input/misc/da9063-onkey.c b/drivers/input/misc/da9063-onkey.c
> new file mode 100644
> index 0000000..9e41a2d
> --- /dev/null
> +++ b/drivers/input/misc/da9063-onkey.c
> @@ -0,0 +1,228 @@
> +/*
> + * da9063-onkey.c - Onkey device driver for DA9063
> + * Copyright (C) 2015 Dialog Semiconductor Ltd.
> + *
> + * This program is free software; you can redistribute it and/or
> + * modify it under the terms of the GNU General Public License
> + * as published by the Free Software Foundation; either version 2
> + * of the License, or (at your option) any later version.
> + *
> + * 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/errno.h>
> +#include <linux/input.h>
> +#include <linux/interrupt.h>
> +#include <linux/platform_device.h>
> +#include <linux/workqueue.h>
> +#include <linux/regmap.h>
> +#include <linux/of.h>
> +#include <linux/mfd/da9063/core.h>
> +#include <linux/mfd/da9063/pdata.h>
> +#include <linux/mfd/da9063/registers.h>
> +
> +struct da9063_onkey {
> + struct da9063 *hw;
> + struct delayed_work work;
> + struct input_dev *input;
> + int irq;
> + bool key_power;
> +};
> +
> +static void da9063_poll_on(struct work_struct *work)
> +{
> + struct da9063_onkey *onkey = container_of(work, struct da9063_onkey,
> + work.work);
> + unsigned int val;
> + int fault_log = 0;
> + bool poll = true;
> + int ret;
> +
> + /* poll to see when the pin is released */
> + ret = regmap_read(onkey->hw->regmap, DA9063_REG_STATUS_A, &val);
> + if (ret < 0) {
> + dev_err(&onkey->input->dev,
> + "Failed to read ON status: %d\n", ret);
> + goto err_poll;
> + }
> +
> + if (!(val & DA9063_NONKEY)) {
> + ret = regmap_update_bits(onkey->hw->regmap,
> + DA9063_REG_CONTROL_B,
> + DA9063_NONKEY_LOCK, 0);
> + if (ret < 0) {
> + dev_err(&onkey->input->dev,
> + "Failed to reset the Key Delay %d\n", ret);
> + goto err_poll;
> + }
> +
> + input_report_key(onkey->input, KEY_POWER, 0);
> + input_sync(onkey->input);
> +
> + poll = false;
> + }
> +
> + /* if the fault log KEY_RESET is detected,
> + * then clear it and shutdown via I2C
> + */
> + ret = regmap_read(onkey->hw->regmap, DA9063_REG_FAULT_LOG, &fault_log);
> + if (ret < 0)
> + dev_warn(&onkey->input->dev, "Cannot read FAULT_LOG\n");
> +
> + if (fault_log & DA9063_KEY_RESET) {
> + ret = regmap_write(onkey->hw->regmap,
> + DA9063_REG_FAULT_LOG,
> + DA9063_KEY_RESET);
> + if (ret < 0)
> + dev_warn(&onkey->input->dev,
> + "Cannot reset KEY_RESET fault log\n");
> + else {
> + /* at this point we do any S/W housekeeping
> + * and then send shutdown command
> + */
> + dev_info(&onkey->input->dev,
> + "Sending SHUTDOWN to DA9063 ...\n");
> + ret = regmap_write(onkey->hw->regmap,
> + DA9063_REG_CONTROL_F,
> + DA9063_SHUTDOWN);
> + if (ret < 0)
> + dev_err(&onkey->input->dev,
> + "Cannot SHUTDOWN DA9063\n");
> + }
> + }
> +
> +err_poll:
> + if (poll)
> + schedule_delayed_work(&onkey->work, 50);
> +}
> +
> +static irqreturn_t da9063_onkey_irq_handler(int irq, void *data)
> +{
> + struct da9063_onkey *onkey = data;
> + unsigned int val;
> + int ret;
> +
> + ret = regmap_read(onkey->hw->regmap, DA9063_REG_STATUS_A, &val);
> + if (onkey->key_power && (ret >= 0) && (val & DA9063_NONKEY)) {
> + input_report_key(onkey->input, KEY_POWER, 1);
> + input_sync(onkey->input);
> + schedule_delayed_work(&onkey->work, 0);
> + dev_notice(&onkey->input->dev, "KEY_POWER pressed.\n");
> + } else {
> + input_report_key(onkey->input, KEY_SLEEP, 1);
> + input_sync(onkey->input);
> + input_report_key(onkey->input, KEY_SLEEP, 0);
> + input_sync(onkey->input);
> + dev_notice(&onkey->input->dev, "KEY_SLEEP pressed.\n");
> + }
> +
> + return IRQ_HANDLED;
> +}
> +
> +static int da9063_onkey_probe(struct platform_device *pdev)
> +{
> + struct da9063 *da9063 = dev_get_drvdata(pdev->dev.parent);
> + struct da9063_pdata *pdata = dev_get_platdata(da9063->dev);
> + struct da9063_onkey *onkey;
> + bool kp_tmp = true;
> + int ret = 0;
> +
> + if (pdata)
> + kp_tmp = pdata->key_power;
> + else {
> + kp_tmp = of_property_read_bool((&pdev->dev)->of_node,
> + "dlg,disable-key-power");
> + kp_tmp = !kp_tmp;
> + }
> +
> + onkey = devm_kzalloc(&pdev->dev, sizeof(struct da9063_onkey),
> + GFP_KERNEL);
> + if (!onkey) {
> + dev_err(&pdev->dev, "Failed to allocate memory.\n");
> + ret = -ENOMEM;
> + goto err;
> + }
> +
> + INIT_DELAYED_WORK(&onkey->work, da9063_poll_on);
> +
> + onkey->input = devm_input_allocate_device(&pdev->dev);
> + if (!onkey->input) {
> + dev_err(&pdev->dev, "Failed to allocated input device.\n");
> + ret = -ENOMEM;
> + goto err;
> + }
> +
> + ret = platform_get_irq_byname(pdev, "ONKEY");
> + if (ret < 0) {
> + dev_err(&pdev->dev, "Failed to get platform IRQ.\n");
> + goto err;
> + }
> + onkey->irq = ret;
> +
> + ret = request_threaded_irq(onkey->irq, NULL,
> + da9063_onkey_irq_handler,
> + IRQF_TRIGGER_LOW | IRQF_ONESHOT,
> + "ONKEY", onkey);
> + if (ret) {
> + dev_err(&pdev->dev,
> + "Failed to request input device IRQ.\n");
> + goto err;
> + }
> +
> + onkey->hw = da9063;
> + onkey->key_power = kp_tmp;
> + onkey->input->evbit[0] = BIT_MASK(EV_KEY);
> + onkey->input->name = DA9063_DRVNAME_ONKEY;
> + onkey->input->phys = DA9063_DRVNAME_ONKEY "/input0";
> + onkey->input->dev.parent = &pdev->dev;
> +
> + if (onkey->key_power)
> + input_set_capability(onkey->input, EV_KEY, KEY_POWER);
> + input_set_capability(onkey->input, EV_KEY, KEY_SLEEP);
> +
> + ret = input_register_device(onkey->input);
> + if (ret) {
> + dev_err(&pdev->dev,
> + "Failed to register input device.\n");
> + goto err_irq;
> + }
> +
> + platform_set_drvdata(pdev, onkey);
> + return 0;
> +
> +err_irq:
> + free_irq(onkey->irq, onkey);
> + cancel_delayed_work_sync(&onkey->work);
> +err:
> + return ret;
> +}
> +
> +static int da9063_onkey_remove(struct platform_device *pdev)
> +{
> + struct da9063_onkey *onkey = platform_get_drvdata(pdev);
> +
> + free_irq(onkey->irq, onkey);
> + cancel_delayed_work_sync(&onkey->work);
> + input_unregister_device(onkey->input);
> + return 0;
> +}
> +
> +static struct platform_driver da9063_onkey_driver = {
> + .probe = da9063_onkey_probe,
> + .remove = da9063_onkey_remove,
> + .driver = {
> + .name = DA9063_DRVNAME_ONKEY,
> + .owner = THIS_MODULE,
> + },
> +};
> +
> +module_platform_driver(da9063_onkey_driver);
> +
> +MODULE_AUTHOR("S Twiss <stwiss.opensource@...semi.com>");
> +MODULE_DESCRIPTION("Onkey device driver for Dialog DA9063");
> +MODULE_LICENSE("GPL v2");
> +MODULE_ALIAS("platform:" DA9063_DRVNAME_ONKEY);
> diff --git a/drivers/mfd/da9063-core.c b/drivers/mfd/da9063-core.c
> index facd361..b6d6f18 100644
> --- a/drivers/mfd/da9063-core.c
> +++ b/drivers/mfd/da9063-core.c
> @@ -60,6 +60,7 @@ static struct resource da9063_rtc_resources[] = {
>
> static struct resource da9063_onkey_resources[] = {
> {
> + .name = "ONKEY",
> .start = DA9063_IRQ_ONKEY,
> .end = DA9063_IRQ_ONKEY,
> .flags = IORESOURCE_IRQ,
> @@ -97,6 +98,7 @@ static const struct mfd_cell da9063_devs[] = {
> .name = DA9063_DRVNAME_ONKEY,
> .num_resources = ARRAY_SIZE(da9063_onkey_resources),
> .resources = da9063_onkey_resources,
> + .of_compatible = "dlg,da9063-onkey",
> },
> {
> .name = DA9063_DRVNAME_RTC,
> @@ -109,12 +111,64 @@ static const struct mfd_cell da9063_devs[] = {
> },
> };
>
> +static int da9063_clear_fault_log(struct da9063 *da9063)
> +{
> + int ret = 0;
> + int fault_log = 0;
> +
> + ret = regmap_read(da9063->regmap, DA9063_REG_FAULT_LOG, &fault_log);
> + if (ret < 0) {
> + dev_err(da9063->dev, "Cannot read FAULT_LOG.\n");
> + return -EIO;
> + }
> +
> + if (fault_log) {
> + if (fault_log & DA9063_TWD_ERROR)
> + dev_dbg(da9063->dev,
> + "Fault log entry detected: DA9063_TWD_ERROR\n");
> + if (fault_log & DA9063_POR)
> + dev_dbg(da9063->dev,
> + "Fault log entry detected: DA9063_POR\n");
> + if (fault_log & DA9063_VDD_FAULT)
> + dev_dbg(da9063->dev,
> + "Fault log entry detected: DA9063_VDD_FAULT\n");
> + if (fault_log & DA9063_VDD_START)
> + dev_dbg(da9063->dev,
> + "Fault log entry detected: DA9063_VDD_START\n");
> + if (fault_log & DA9063_TEMP_CRIT)
> + dev_dbg(da9063->dev,
> + "Fault log entry detected: DA9063_TEMP_CRIT\n");
> + if (fault_log & DA9063_KEY_RESET)
> + dev_dbg(da9063->dev,
> + "Fault log entry detected: DA9063_KEY_RESET\n");
> + if (fault_log & DA9063_NSHUTDOWN)
> + dev_dbg(da9063->dev,
> + "Fault log entry detected: DA9063_NSHUTDOWN\n");
> + if (fault_log & DA9063_WAIT_SHUT)
> + dev_dbg(da9063->dev,
> + "Fault log entry detected: DA9063_WAIT_SHUT\n");
> + }
> +
> + ret = regmap_write(da9063->regmap,
> + DA9063_REG_FAULT_LOG,
> + fault_log);
> + if (ret < 0)
> + dev_err(da9063->dev,
> + "Cannot reset FAULT_LOG values %d\n", ret);
> +
> + return ret;
> +}
> +
> int da9063_device_init(struct da9063 *da9063, unsigned int irq)
> {
> struct da9063_pdata *pdata = da9063->dev->platform_data;
> int model, variant_id, variant_code;
> int ret;
>
> + ret = da9063_clear_fault_log(da9063);
> + if (ret < 0)
> + dev_err(da9063->dev, "Cannot clear fault log\n");
> +
> if (pdata) {
> da9063->flags = pdata->flags;
> da9063->irq_base = pdata->irq_base;
> @@ -178,6 +232,7 @@ int da9063_device_init(struct da9063 *da9063, unsigned int irq)
> if (ret)
> dev_err(da9063->dev, "Cannot add MFD cells\n");
>
> +
> return ret;
> }
>
> diff --git a/include/linux/mfd/da9063/pdata.h b/include/linux/mfd/da9063/pdata.h
> index 95c8742..612383b 100644
> --- a/include/linux/mfd/da9063/pdata.h
> +++ b/include/linux/mfd/da9063/pdata.h
> @@ -103,6 +103,7 @@ struct da9063;
> struct da9063_pdata {
> int (*init)(struct da9063 *da9063);
> int irq_base;
> + bool key_power;
> unsigned flags;
> struct da9063_regulators_pdata *regulators_pdata;
> struct led_platform_data *leds_pdata;
> --
> end-of-patch for RESEND PATCH V2
>
--
Dmitry
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