| Message ID | 1579228475-6681-4-git-send-email-jeff@labundy.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Add support for Azoteq IQS620A/621/622/624/625 | expand |
Hi Jeff, On Fri, Jan 17, 2020 at 02:35:46AM +0000, Jeff LaBundy wrote: > This patch adds key and switch support for the Azoteq IQS620A, > IQS621, IQS622, IQS624 and IQS625 multi-function sensors. > > Signed-off-by: Jeff LaBundy <jeff@labundy.com> > --- > Changes in v4: > - None > > Changes in v3: > - None > > Changes in v2: > - Merged 'Copyright' and 'Author' lines into one in introductory comments > - Replaced 'error' with 'ret' throughout > - Updated iqs62x_keys_parse_prop to use unified device property interface > - Clarified the comment in iqs62x_keys_notifier to state that wheel up or > down events elicit an emulated release cycle > - Eliminated tabbed alignment of platform_driver struct members > > drivers/input/keyboard/Kconfig | 10 ++ > drivers/input/keyboard/Makefile | 1 + > drivers/input/keyboard/iqs62x-keys.c | 340 +++++++++++++++++++++++++++++++++++ > 3 files changed, 351 insertions(+) > create mode 100644 drivers/input/keyboard/iqs62x-keys.c > > diff --git a/drivers/input/keyboard/Kconfig b/drivers/input/keyboard/Kconfig > index 4706ff0..28de965 100644 > --- a/drivers/input/keyboard/Kconfig > +++ b/drivers/input/keyboard/Kconfig > @@ -663,6 +663,16 @@ config KEYBOARD_IPAQ_MICRO > To compile this driver as a module, choose M here: the > module will be called ipaq-micro-keys. > > +config KEYBOARD_IQS62X > + tristate "Azoteq IQS620A/621/622/624/625 keys and switches" > + depends on MFD_IQS62X > + help > + Say Y here to enable key and switch support for the Azoteq IQS620A, > + IQS621, IQS622, IQS624 and IQS625 multi-function sensors. > + > + To compile this driver as a module, choose M here: the module will > + be called iqs62x-keys. > + > config KEYBOARD_OMAP > tristate "TI OMAP keypad support" > depends on ARCH_OMAP1 > diff --git a/drivers/input/keyboard/Makefile b/drivers/input/keyboard/Makefile > index f5b1752..1d689fd 100644 > --- a/drivers/input/keyboard/Makefile > +++ b/drivers/input/keyboard/Makefile > @@ -28,6 +28,7 @@ obj-$(CONFIG_KEYBOARD_TCA8418) += tca8418_keypad.o > obj-$(CONFIG_KEYBOARD_HIL) += hil_kbd.o > obj-$(CONFIG_KEYBOARD_HIL_OLD) += hilkbd.o > obj-$(CONFIG_KEYBOARD_IPAQ_MICRO) += ipaq-micro-keys.o > +obj-$(CONFIG_KEYBOARD_IQS62X) += iqs62x-keys.o > obj-$(CONFIG_KEYBOARD_IMX) += imx_keypad.o > obj-$(CONFIG_KEYBOARD_IMX_SC_KEY) += imx_sc_key.o > obj-$(CONFIG_KEYBOARD_HP6XX) += jornada680_kbd.o > diff --git a/drivers/input/keyboard/iqs62x-keys.c b/drivers/input/keyboard/iqs62x-keys.c > new file mode 100644 > index 0000000..b477334 > --- /dev/null > +++ b/drivers/input/keyboard/iqs62x-keys.c > @@ -0,0 +1,340 @@ > +// SPDX-License-Identifier: GPL-2.0+ > +/* > + * Azoteq IQS620A/621/622/624/625 Keys and Switches > + * > + * Copyright (C) 2019 Jeff LaBundy <jeff@labundy.com> > + */ > + > +#include <linux/device.h> > +#include <linux/input.h> > +#include <linux/kernel.h> > +#include <linux/mfd/iqs62x.h> > +#include <linux/module.h> > +#include <linux/notifier.h> > +#include <linux/platform_device.h> > +#include <linux/property.h> > +#include <linux/regmap.h> > +#include <linux/slab.h> > + > +enum { > + IQS62X_SW_HALL_N, > + IQS62X_SW_HALL_S, > +}; > + > +static const char * const iqs62x_switch_names[] = { > + [IQS62X_SW_HALL_N] = "hall-switch-north", > + [IQS62X_SW_HALL_S] = "hall-switch-south", > +}; > + > +struct iqs62x_switch_desc { > + enum iqs62x_event_flag flag; > + unsigned int code; > + bool enabled; > +}; > + > +struct iqs62x_keys_private { > + struct iqs62x_core *iqs62x; > + struct input_dev *input; > + struct notifier_block notifier; > + struct iqs62x_switch_desc switches[ARRAY_SIZE(iqs62x_switch_names)]; > + unsigned int keycode[IQS62X_NUM_KEYS]; > + unsigned int keycodemax; > + u8 interval; > +}; > + > +static int iqs62x_keys_parse_prop(struct platform_device *pdev, > + struct iqs62x_keys_private *iqs62x_keys) > +{ > + struct fwnode_handle *child; > + unsigned int val; > + int ret, i; > + > + ret = device_property_read_u32_array(&pdev->dev, "linux,keycodes", > + NULL, 0); You can use device_property_count_u32(). > + if (ret > IQS62X_NUM_KEYS) { > + dev_err(&pdev->dev, "Too many keycodes present\n"); > + return -EINVAL; > + } else if (ret < 0) { > + dev_err(&pdev->dev, "Failed to count keycodes: %d\n", ret); > + return ret; > + } > + iqs62x_keys->keycodemax = ret; > + > + ret = device_property_read_u32_array(&pdev->dev, "linux,keycodes", > + iqs62x_keys->keycode, > + iqs62x_keys->keycodemax); > + if (ret) { > + dev_err(&pdev->dev, "Failed to read keycodes: %d\n", ret); > + return ret; > + } I wonder why you can't simply use error = device_property_read_u32_array(&pdev->dev, "linux,keycodes", iqs62x_keys->keycode, IQS62X_NUM_KEYS); Are you concerned with someone trying to set up keys that are not actually exposed later via EVOCSKEYCODES and that is why you are limiting keycodemax? > + > + for (i = 0; i < ARRAY_SIZE(iqs62x_keys->switches); i++) { > + child = device_get_named_child_node(&pdev->dev, > + iqs62x_switch_names[i]); > + if (!child) > + continue; > + > + ret = fwnode_property_read_u32(child, "linux,code", &val); > + if (ret) { > + dev_err(&pdev->dev, "Failed to read switch code: %d\n", > + ret); > + return ret; > + } > + iqs62x_keys->switches[i].code = val; > + iqs62x_keys->switches[i].enabled = true; > + > + if (fwnode_property_present(child, "azoteq,use-prox")) > + iqs62x_keys->switches[i].flag = (i == IQS62X_SW_HALL_N ? > + IQS62X_EVENT_HALL_N_P : > + IQS62X_EVENT_HALL_S_P); > + else > + iqs62x_keys->switches[i].flag = (i == IQS62X_SW_HALL_N ? > + IQS62X_EVENT_HALL_N_T : > + IQS62X_EVENT_HALL_S_T); > + } > + > + return 0; > +} > + > +static int iqs62x_keys_init(struct iqs62x_keys_private *iqs62x_keys) > +{ > + struct iqs62x_core *iqs62x = iqs62x_keys->iqs62x; > + enum iqs62x_event_flag flag; > + unsigned int event_mask_reg; > + unsigned int event_mask = 0; > + unsigned int val; > + int ret, i; > + > + switch (iqs62x->dev_desc->prod_num) { > + case IQS620_PROD_NUM: > + case IQS621_PROD_NUM: > + case IQS622_PROD_NUM: > + event_mask_reg = IQS620_GLBL_EVENT_MASK; > + > + /* > + * Discreet button, hysteresis and SAR UI flags represent keys > + * and are unmasked if mapped to a valid keycode. > + */ > + for (i = 0; i < iqs62x_keys->keycodemax; i++) { > + if (iqs62x_keys->keycode[i] == KEY_RESERVED) > + continue; > + > + if (iqs62x_events[i].reg == IQS62X_EVENT_PROX) > + event_mask |= iqs62x->dev_desc->prox_mask; > + else if (iqs62x_events[i].reg == IQS62X_EVENT_HYST) > + event_mask |= (iqs62x->dev_desc->hyst_mask | > + iqs62x->dev_desc->sar_mask); > + } > + > + ret = regmap_read(iqs62x->map, iqs62x->dev_desc->hall_flags, > + &val); > + if (ret) > + return ret; > + > + /* > + * Hall UI flags represent switches and are unmasked if their > + * corresponding child nodes are present. > + */ > + for (i = 0; i < ARRAY_SIZE(iqs62x_keys->switches); i++) { > + if (!(iqs62x_keys->switches[i].enabled)) > + continue; > + > + flag = iqs62x_keys->switches[i].flag; > + > + if (iqs62x_events[flag].reg != IQS62X_EVENT_HALL) > + continue; > + > + event_mask |= iqs62x->dev_desc->hall_mask; > + > + input_report_switch(iqs62x_keys->input, > + iqs62x_keys->switches[i].code, > + (val & iqs62x_events[flag].mask) == > + iqs62x_events[flag].val); > + } > + > + input_sync(iqs62x_keys->input); > + break; > + > + case IQS624_PROD_NUM: > + event_mask_reg = IQS624_HALL_UI; > + > + /* > + * Interval change events represent keys and are unmasked if > + * either wheel movement flag is mapped to a valid keycode. > + */ > + if (iqs62x_keys->keycode[IQS62X_EVENT_WHEEL_UP] != KEY_RESERVED) > + event_mask |= IQS624_HALL_UI_INT_EVENT; > + > + if (iqs62x_keys->keycode[IQS62X_EVENT_WHEEL_DN] != KEY_RESERVED) > + event_mask |= IQS624_HALL_UI_INT_EVENT; > + > + ret = regmap_read(iqs62x->map, iqs62x->dev_desc->interval, > + &val); > + if (ret) > + return ret; > + > + iqs62x_keys->interval = val; > + break; > + > + default: > + return 0; > + } > + > + return regmap_update_bits(iqs62x->map, event_mask_reg, event_mask, 0); > +} > + > +static int iqs62x_keys_notifier(struct notifier_block *notifier, > + unsigned long event_flags, void *context) > +{ > + struct iqs62x_event_data *event_data = context; > + struct iqs62x_keys_private *iqs62x_keys; > + int ret, i; > + > + iqs62x_keys = container_of(notifier, struct iqs62x_keys_private, > + notifier); > + > + if (event_flags & BIT(IQS62X_EVENT_SYS_RESET)) { > + ret = iqs62x_keys_init(iqs62x_keys); > + if (ret) { > + dev_err(iqs62x_keys->input->dev.parent, > + "Failed to re-initialize device: %d\n", ret); > + return NOTIFY_BAD; > + } > + > + return NOTIFY_OK; > + } > + > + for (i = 0; i < iqs62x_keys->keycodemax; i++) { > + if (iqs62x_events[i].reg == IQS62X_EVENT_WHEEL && > + event_data->interval == iqs62x_keys->interval) > + continue; > + > + input_report_key(iqs62x_keys->input, iqs62x_keys->keycode[i], > + event_flags & BIT(i)); > + } > + > + for (i = 0; i < ARRAY_SIZE(iqs62x_keys->switches); i++) > + if (iqs62x_keys->switches[i].enabled) > + input_report_switch(iqs62x_keys->input, > + iqs62x_keys->switches[i].code, > + event_flags & > + BIT(iqs62x_keys->switches[i].flag)); > + > + input_sync(iqs62x_keys->input); > + > + if (event_data->interval == iqs62x_keys->interval) > + return NOTIFY_OK; > + > + /* > + * Each frame contains at most one wheel event (up or down), in which > + * case a complementary release cycle is emulated. > + */ > + if (event_flags & BIT(IQS62X_EVENT_WHEEL_UP)) { > + input_report_key(iqs62x_keys->input, > + iqs62x_keys->keycode[IQS62X_EVENT_WHEEL_UP], > + 0); > + input_sync(iqs62x_keys->input); > + } else if (event_flags & BIT(IQS62X_EVENT_WHEEL_DN)) { > + input_report_key(iqs62x_keys->input, > + iqs62x_keys->keycode[IQS62X_EVENT_WHEEL_DN], > + 0); > + input_sync(iqs62x_keys->input); > + } > + > + iqs62x_keys->interval = event_data->interval; > + > + return NOTIFY_OK; > +} > + > +static int iqs62x_keys_probe(struct platform_device *pdev) > +{ > + struct iqs62x_core *iqs62x = dev_get_drvdata(pdev->dev.parent); > + struct iqs62x_keys_private *iqs62x_keys; > + struct input_dev *input; > + int ret, i; > + > + iqs62x_keys = devm_kzalloc(&pdev->dev, sizeof(*iqs62x_keys), > + GFP_KERNEL); > + if (!iqs62x_keys) > + return -ENOMEM; > + > + platform_set_drvdata(pdev, iqs62x_keys); > + > + ret = iqs62x_keys_parse_prop(pdev, iqs62x_keys); > + if (ret) > + return ret; > + > + input = devm_input_allocate_device(&pdev->dev); > + if (!input) > + return -ENOMEM; > + > + input->keycodemax = iqs62x_keys->keycodemax; > + input->keycode = iqs62x_keys->keycode; > + input->keycodesize = sizeof(*iqs62x_keys->keycode); > + > + input->name = iqs62x->dev_desc->dev_name; > + input->id.bustype = BUS_I2C; > + > + __set_bit(EV_KEY, input->evbit); > + > + for (i = 0; i < iqs62x_keys->keycodemax; i++) > + __set_bit(iqs62x_keys->keycode[i], input->keybit); > + > + __clear_bit(KEY_RESERVED, input->keybit); > + > + for (i = 0; i < ARRAY_SIZE(iqs62x_keys->switches); i++) > + if (iqs62x_keys->switches[i].enabled) { > + __set_bit(EV_SW, input->evbit); > + __set_bit(iqs62x_keys->switches[i].code, input->swbit); input_set_capability(input, EV_SW, iqs62x_keys->switches[i].code) > + } > + > + iqs62x_keys->iqs62x = iqs62x; > + iqs62x_keys->input = input; > + > + ret = iqs62x_keys_init(iqs62x_keys); > + if (ret) { > + dev_err(&pdev->dev, "Failed to initialize device: %d\n", ret); > + return ret; > + } > + > + ret = input_register_device(iqs62x_keys->input); > + if (ret) { > + dev_err(&pdev->dev, "Failed to register device: %d\n", ret); > + return ret; > + } > + > + iqs62x_keys->notifier.notifier_call = iqs62x_keys_notifier; > + ret = blocking_notifier_chain_register(&iqs62x_keys->iqs62x->nh, > + &iqs62x_keys->notifier); > + if (ret) > + dev_err(&pdev->dev, "Failed to register notifier: %d\n", ret); > + > + return ret; > +} > + > +static int iqs62x_keys_remove(struct platform_device *pdev) > +{ > + struct iqs62x_keys_private *iqs62x_keys = platform_get_drvdata(pdev); > + int ret; > + > + ret = blocking_notifier_chain_unregister(&iqs62x_keys->iqs62x->nh, > + &iqs62x_keys->notifier); > + if (ret) > + dev_err(&pdev->dev, "Failed to unregister notifier: %d\n", ret); > + > + return ret; > +} > + > +static struct platform_driver iqs62x_keys_platform_driver = { > + .driver = { > + .name = IQS62X_DRV_NAME_KEYS, > + }, > + .probe = iqs62x_keys_probe, > + .remove = iqs62x_keys_remove, > +}; > +module_platform_driver(iqs62x_keys_platform_driver); > + > +MODULE_AUTHOR("Jeff LaBundy <jeff@labundy.com>"); > +MODULE_DESCRIPTION("Azoteq IQS620A/621/622/624/625 Keys and Switches"); > +MODULE_LICENSE("GPL"); > +MODULE_ALIAS("platform:" IQS62X_DRV_NAME_KEYS); Otherwise Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> I suppose it will be merged through MFD? Thanks.
Hi Dmitry, Thank you for your continued support on this project. On Fri, Jan 17, 2020 at 01:33:30PM -0800, dmitry.torokhov@gmail.com wrote: > Hi Jeff, > > On Fri, Jan 17, 2020 at 02:35:46AM +0000, Jeff LaBundy wrote: > > This patch adds key and switch support for the Azoteq IQS620A, > > IQS621, IQS622, IQS624 and IQS625 multi-function sensors. > > > > Signed-off-by: Jeff LaBundy <jeff@labundy.com> > > --- > > Changes in v4: > > - None > > > > Changes in v3: > > - None > > > > Changes in v2: > > - Merged 'Copyright' and 'Author' lines into one in introductory comments > > - Replaced 'error' with 'ret' throughout > > - Updated iqs62x_keys_parse_prop to use unified device property interface > > - Clarified the comment in iqs62x_keys_notifier to state that wheel up or > > down events elicit an emulated release cycle > > - Eliminated tabbed alignment of platform_driver struct members > > > > drivers/input/keyboard/Kconfig | 10 ++ > > drivers/input/keyboard/Makefile | 1 + > > drivers/input/keyboard/iqs62x-keys.c | 340 +++++++++++++++++++++++++++++++++++ > > 3 files changed, 351 insertions(+) > > create mode 100644 drivers/input/keyboard/iqs62x-keys.c > > > > diff --git a/drivers/input/keyboard/Kconfig b/drivers/input/keyboard/Kconfig > > index 4706ff0..28de965 100644 > > --- a/drivers/input/keyboard/Kconfig > > +++ b/drivers/input/keyboard/Kconfig > > @@ -663,6 +663,16 @@ config KEYBOARD_IPAQ_MICRO > > To compile this driver as a module, choose M here: the > > module will be called ipaq-micro-keys. > > > > +config KEYBOARD_IQS62X > > + tristate "Azoteq IQS620A/621/622/624/625 keys and switches" > > + depends on MFD_IQS62X > > + help > > + Say Y here to enable key and switch support for the Azoteq IQS620A, > > + IQS621, IQS622, IQS624 and IQS625 multi-function sensors. > > + > > + To compile this driver as a module, choose M here: the module will > > + be called iqs62x-keys. > > + > > config KEYBOARD_OMAP > > tristate "TI OMAP keypad support" > > depends on ARCH_OMAP1 > > diff --git a/drivers/input/keyboard/Makefile b/drivers/input/keyboard/Makefile > > index f5b1752..1d689fd 100644 > > --- a/drivers/input/keyboard/Makefile > > +++ b/drivers/input/keyboard/Makefile > > @@ -28,6 +28,7 @@ obj-$(CONFIG_KEYBOARD_TCA8418) += tca8418_keypad.o > > obj-$(CONFIG_KEYBOARD_HIL) += hil_kbd.o > > obj-$(CONFIG_KEYBOARD_HIL_OLD) += hilkbd.o > > obj-$(CONFIG_KEYBOARD_IPAQ_MICRO) += ipaq-micro-keys.o > > +obj-$(CONFIG_KEYBOARD_IQS62X) += iqs62x-keys.o > > obj-$(CONFIG_KEYBOARD_IMX) += imx_keypad.o > > obj-$(CONFIG_KEYBOARD_IMX_SC_KEY) += imx_sc_key.o > > obj-$(CONFIG_KEYBOARD_HP6XX) += jornada680_kbd.o > > diff --git a/drivers/input/keyboard/iqs62x-keys.c b/drivers/input/keyboard/iqs62x-keys.c > > new file mode 100644 > > index 0000000..b477334 > > --- /dev/null > > +++ b/drivers/input/keyboard/iqs62x-keys.c > > @@ -0,0 +1,340 @@ > > +// SPDX-License-Identifier: GPL-2.0+ > > +/* > > + * Azoteq IQS620A/621/622/624/625 Keys and Switches > > + * > > + * Copyright (C) 2019 Jeff LaBundy <jeff@labundy.com> > > + */ > > + > > +#include <linux/device.h> > > +#include <linux/input.h> > > +#include <linux/kernel.h> > > +#include <linux/mfd/iqs62x.h> > > +#include <linux/module.h> > > +#include <linux/notifier.h> > > +#include <linux/platform_device.h> > > +#include <linux/property.h> > > +#include <linux/regmap.h> > > +#include <linux/slab.h> > > + > > +enum { > > + IQS62X_SW_HALL_N, > > + IQS62X_SW_HALL_S, > > +}; > > + > > +static const char * const iqs62x_switch_names[] = { > > + [IQS62X_SW_HALL_N] = "hall-switch-north", > > + [IQS62X_SW_HALL_S] = "hall-switch-south", > > +}; > > + > > +struct iqs62x_switch_desc { > > + enum iqs62x_event_flag flag; > > + unsigned int code; > > + bool enabled; > > +}; > > + > > +struct iqs62x_keys_private { > > + struct iqs62x_core *iqs62x; > > + struct input_dev *input; > > + struct notifier_block notifier; > > + struct iqs62x_switch_desc switches[ARRAY_SIZE(iqs62x_switch_names)]; > > + unsigned int keycode[IQS62X_NUM_KEYS]; > > + unsigned int keycodemax; > > + u8 interval; > > +}; > > + > > +static int iqs62x_keys_parse_prop(struct platform_device *pdev, > > + struct iqs62x_keys_private *iqs62x_keys) > > +{ > > + struct fwnode_handle *child; > > + unsigned int val; > > + int ret, i; > > + > > + ret = device_property_read_u32_array(&pdev->dev, "linux,keycodes", > > + NULL, 0); > > You can use device_property_count_u32(). Sure thing, will do. > > > + if (ret > IQS62X_NUM_KEYS) { > > + dev_err(&pdev->dev, "Too many keycodes present\n"); > > + return -EINVAL; > > + } else if (ret < 0) { > > + dev_err(&pdev->dev, "Failed to count keycodes: %d\n", ret); > > + return ret; > > + } > > + iqs62x_keys->keycodemax = ret; > > + > > + ret = device_property_read_u32_array(&pdev->dev, "linux,keycodes", > > + iqs62x_keys->keycode, > > + iqs62x_keys->keycodemax); > > + if (ret) { > > + dev_err(&pdev->dev, "Failed to read keycodes: %d\n", ret); > > + return ret; > > + } > > I wonder why you can't simply use > > error = device_property_read_u32_array(&pdev->dev, "linux,keycodes", > iqs62x_keys->keycode, > IQS62X_NUM_KEYS); > > Are you concerned with someone trying to set up keys that are not > actually exposed later via EVOCSKEYCODES and that is why you are > limiting keycodemax? When I try this, I find that device_property_read_u32_array returns -EOVERFLOW for arrays with fewer than IQS62X_NUM_KEYS elements. To avoid forcing users to pad the array all the way out to IQS62X_NUM_KEYS in the case of simple channel assignments (like those in the example bindings), keycodemax must be passed to device_property_read_u32_array which means it must be limited before-hand. The same method seems to be used in other drivers as well (e.g. mpr121_touchkey). > > > + > > + for (i = 0; i < ARRAY_SIZE(iqs62x_keys->switches); i++) { > > + child = device_get_named_child_node(&pdev->dev, > > + iqs62x_switch_names[i]); > > + if (!child) > > + continue; > > + > > + ret = fwnode_property_read_u32(child, "linux,code", &val); > > + if (ret) { > > + dev_err(&pdev->dev, "Failed to read switch code: %d\n", > > + ret); > > + return ret; > > + } > > + iqs62x_keys->switches[i].code = val; > > + iqs62x_keys->switches[i].enabled = true; > > + > > + if (fwnode_property_present(child, "azoteq,use-prox")) > > + iqs62x_keys->switches[i].flag = (i == IQS62X_SW_HALL_N ? > > + IQS62X_EVENT_HALL_N_P : > > + IQS62X_EVENT_HALL_S_P); > > + else > > + iqs62x_keys->switches[i].flag = (i == IQS62X_SW_HALL_N ? > > + IQS62X_EVENT_HALL_N_T : > > + IQS62X_EVENT_HALL_S_T); > > + } > > + > > + return 0; > > +} > > + > > +static int iqs62x_keys_init(struct iqs62x_keys_private *iqs62x_keys) > > +{ > > + struct iqs62x_core *iqs62x = iqs62x_keys->iqs62x; > > + enum iqs62x_event_flag flag; > > + unsigned int event_mask_reg; > > + unsigned int event_mask = 0; > > + unsigned int val; > > + int ret, i; > > + > > + switch (iqs62x->dev_desc->prod_num) { > > + case IQS620_PROD_NUM: > > + case IQS621_PROD_NUM: > > + case IQS622_PROD_NUM: > > + event_mask_reg = IQS620_GLBL_EVENT_MASK; > > + > > + /* > > + * Discreet button, hysteresis and SAR UI flags represent keys > > + * and are unmasked if mapped to a valid keycode. > > + */ > > + for (i = 0; i < iqs62x_keys->keycodemax; i++) { > > + if (iqs62x_keys->keycode[i] == KEY_RESERVED) > > + continue; > > + > > + if (iqs62x_events[i].reg == IQS62X_EVENT_PROX) > > + event_mask |= iqs62x->dev_desc->prox_mask; > > + else if (iqs62x_events[i].reg == IQS62X_EVENT_HYST) > > + event_mask |= (iqs62x->dev_desc->hyst_mask | > > + iqs62x->dev_desc->sar_mask); > > + } > > + > > + ret = regmap_read(iqs62x->map, iqs62x->dev_desc->hall_flags, > > + &val); > > + if (ret) > > + return ret; > > + > > + /* > > + * Hall UI flags represent switches and are unmasked if their > > + * corresponding child nodes are present. > > + */ > > + for (i = 0; i < ARRAY_SIZE(iqs62x_keys->switches); i++) { > > + if (!(iqs62x_keys->switches[i].enabled)) > > + continue; > > + > > + flag = iqs62x_keys->switches[i].flag; > > + > > + if (iqs62x_events[flag].reg != IQS62X_EVENT_HALL) > > + continue; > > + > > + event_mask |= iqs62x->dev_desc->hall_mask; > > + > > + input_report_switch(iqs62x_keys->input, > > + iqs62x_keys->switches[i].code, > > + (val & iqs62x_events[flag].mask) == > > + iqs62x_events[flag].val); > > + } > > + > > + input_sync(iqs62x_keys->input); > > + break; > > + > > + case IQS624_PROD_NUM: > > + event_mask_reg = IQS624_HALL_UI; > > + > > + /* > > + * Interval change events represent keys and are unmasked if > > + * either wheel movement flag is mapped to a valid keycode. > > + */ > > + if (iqs62x_keys->keycode[IQS62X_EVENT_WHEEL_UP] != KEY_RESERVED) > > + event_mask |= IQS624_HALL_UI_INT_EVENT; > > + > > + if (iqs62x_keys->keycode[IQS62X_EVENT_WHEEL_DN] != KEY_RESERVED) > > + event_mask |= IQS624_HALL_UI_INT_EVENT; > > + > > + ret = regmap_read(iqs62x->map, iqs62x->dev_desc->interval, > > + &val); > > + if (ret) > > + return ret; > > + > > + iqs62x_keys->interval = val; > > + break; > > + > > + default: > > + return 0; > > + } > > + > > + return regmap_update_bits(iqs62x->map, event_mask_reg, event_mask, 0); > > +} > > + > > +static int iqs62x_keys_notifier(struct notifier_block *notifier, > > + unsigned long event_flags, void *context) > > +{ > > + struct iqs62x_event_data *event_data = context; > > + struct iqs62x_keys_private *iqs62x_keys; > > + int ret, i; > > + > > + iqs62x_keys = container_of(notifier, struct iqs62x_keys_private, > > + notifier); > > + > > + if (event_flags & BIT(IQS62X_EVENT_SYS_RESET)) { > > + ret = iqs62x_keys_init(iqs62x_keys); > > + if (ret) { > > + dev_err(iqs62x_keys->input->dev.parent, > > + "Failed to re-initialize device: %d\n", ret); > > + return NOTIFY_BAD; > > + } > > + > > + return NOTIFY_OK; > > + } > > + > > + for (i = 0; i < iqs62x_keys->keycodemax; i++) { > > + if (iqs62x_events[i].reg == IQS62X_EVENT_WHEEL && > > + event_data->interval == iqs62x_keys->interval) > > + continue; > > + > > + input_report_key(iqs62x_keys->input, iqs62x_keys->keycode[i], > > + event_flags & BIT(i)); > > + } > > + > > + for (i = 0; i < ARRAY_SIZE(iqs62x_keys->switches); i++) > > + if (iqs62x_keys->switches[i].enabled) > > + input_report_switch(iqs62x_keys->input, > > + iqs62x_keys->switches[i].code, > > + event_flags & > > + BIT(iqs62x_keys->switches[i].flag)); > > + > > + input_sync(iqs62x_keys->input); > > + > > + if (event_data->interval == iqs62x_keys->interval) > > + return NOTIFY_OK; > > + > > + /* > > + * Each frame contains at most one wheel event (up or down), in which > > + * case a complementary release cycle is emulated. > > + */ > > + if (event_flags & BIT(IQS62X_EVENT_WHEEL_UP)) { > > + input_report_key(iqs62x_keys->input, > > + iqs62x_keys->keycode[IQS62X_EVENT_WHEEL_UP], > > + 0); > > + input_sync(iqs62x_keys->input); > > + } else if (event_flags & BIT(IQS62X_EVENT_WHEEL_DN)) { > > + input_report_key(iqs62x_keys->input, > > + iqs62x_keys->keycode[IQS62X_EVENT_WHEEL_DN], > > + 0); > > + input_sync(iqs62x_keys->input); > > + } > > + > > + iqs62x_keys->interval = event_data->interval; > > + > > + return NOTIFY_OK; > > +} > > + > > +static int iqs62x_keys_probe(struct platform_device *pdev) > > +{ > > + struct iqs62x_core *iqs62x = dev_get_drvdata(pdev->dev.parent); > > + struct iqs62x_keys_private *iqs62x_keys; > > + struct input_dev *input; > > + int ret, i; > > + > > + iqs62x_keys = devm_kzalloc(&pdev->dev, sizeof(*iqs62x_keys), > > + GFP_KERNEL); > > + if (!iqs62x_keys) > > + return -ENOMEM; > > + > > + platform_set_drvdata(pdev, iqs62x_keys); > > + > > + ret = iqs62x_keys_parse_prop(pdev, iqs62x_keys); > > + if (ret) > > + return ret; > > + > > + input = devm_input_allocate_device(&pdev->dev); > > + if (!input) > > + return -ENOMEM; > > + > > + input->keycodemax = iqs62x_keys->keycodemax; > > + input->keycode = iqs62x_keys->keycode; > > + input->keycodesize = sizeof(*iqs62x_keys->keycode); > > + > > + input->name = iqs62x->dev_desc->dev_name; > > + input->id.bustype = BUS_I2C; > > + > > + __set_bit(EV_KEY, input->evbit); > > + > > + for (i = 0; i < iqs62x_keys->keycodemax; i++) > > + __set_bit(iqs62x_keys->keycode[i], input->keybit); > > + > > + __clear_bit(KEY_RESERVED, input->keybit); It occurs to me that we can also collapse the __set_bit ... __clear_bit logic above into the following: for (i = 0; i < iqs62x_keys->keycodemax; i++) if (iqs62x_keys->keycode[i] != KEY_RESERVED) input_set_capability(input, EV_KEY, iqs62x_keys->keycode[i]); Since this seems straightforward enough, I plan on sneaking it into v5 along with the change below while keeping your Acked-by. If you have any objection, please let me know. > > + > > + for (i = 0; i < ARRAY_SIZE(iqs62x_keys->switches); i++) > > + if (iqs62x_keys->switches[i].enabled) { > > + __set_bit(EV_SW, input->evbit); > > + __set_bit(iqs62x_keys->switches[i].code, input->swbit); > > input_set_capability(input, EV_SW, iqs62x_keys->switches[i].code) Sure thing, will do. > > > + } > > + > > + iqs62x_keys->iqs62x = iqs62x; > > + iqs62x_keys->input = input; > > + > > + ret = iqs62x_keys_init(iqs62x_keys); > > + if (ret) { > > + dev_err(&pdev->dev, "Failed to initialize device: %d\n", ret); > > + return ret; > > + } > > + > > + ret = input_register_device(iqs62x_keys->input); > > + if (ret) { > > + dev_err(&pdev->dev, "Failed to register device: %d\n", ret); > > + return ret; > > + } > > + > > + iqs62x_keys->notifier.notifier_call = iqs62x_keys_notifier; > > + ret = blocking_notifier_chain_register(&iqs62x_keys->iqs62x->nh, > > + &iqs62x_keys->notifier); > > + if (ret) > > + dev_err(&pdev->dev, "Failed to register notifier: %d\n", ret); > > + > > + return ret; > > +} > > + > > +static int iqs62x_keys_remove(struct platform_device *pdev) > > +{ > > + struct iqs62x_keys_private *iqs62x_keys = platform_get_drvdata(pdev); > > + int ret; > > + > > + ret = blocking_notifier_chain_unregister(&iqs62x_keys->iqs62x->nh, > > + &iqs62x_keys->notifier); > > + if (ret) > > + dev_err(&pdev->dev, "Failed to unregister notifier: %d\n", ret); > > + > > + return ret; > > +} > > + > > +static struct platform_driver iqs62x_keys_platform_driver = { > > + .driver = { > > + .name = IQS62X_DRV_NAME_KEYS, > > + }, > > + .probe = iqs62x_keys_probe, > > + .remove = iqs62x_keys_remove, > > +}; > > +module_platform_driver(iqs62x_keys_platform_driver); > > + > > +MODULE_AUTHOR("Jeff LaBundy <jeff@labundy.com>"); > > +MODULE_DESCRIPTION("Azoteq IQS620A/621/622/624/625 Keys and Switches"); > > +MODULE_LICENSE("GPL"); > > +MODULE_ALIAS("platform:" IQS62X_DRV_NAME_KEYS); > > Otherwise > > Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> > > I suppose it will be merged through MFD? That's the plan; Lee confirmed this would be OK once the series is ready. Just as a heads up, I expect minor changes to this and other patches as iqs62x.h is hardened (e.g. "iqs62x->map" --> "iqs62x->regmap"). I assume you're OK with me keeping your Acked-by unless there are major changes, but let me know if you'd prefer I didn't. > > Thanks. > > -- > Dmitry Kind regards, Jeff LaBundy
On Sun, Jan 19, 2020 at 10:40:31PM +0000, Jeff LaBundy wrote: > On Fri, Jan 17, 2020 at 01:33:30PM -0800, dmitry.torokhov@gmail.com wrote: > > On Fri, Jan 17, 2020 at 02:35:46AM +0000, Jeff LaBundy wrote: > > > + > > > + ret = device_property_read_u32_array(&pdev->dev, "linux,keycodes", > > > + iqs62x_keys->keycode, > > > + iqs62x_keys->keycodemax); > > > + if (ret) { > > > + dev_err(&pdev->dev, "Failed to read keycodes: %d\n", ret); > > > + return ret; > > > + } > > > > I wonder why you can't simply use > > > > error = device_property_read_u32_array(&pdev->dev, "linux,keycodes", > > iqs62x_keys->keycode, > > IQS62X_NUM_KEYS); > > > > Are you concerned with someone trying to set up keys that are not > > actually exposed later via EVOCSKEYCODES and that is why you are > > limiting keycodemax? > > When I try this, I find that device_property_read_u32_array returns -EOVERFLOW > for arrays with fewer than IQS62X_NUM_KEYS elements. To avoid forcing users to > pad the array all the way out to IQS62X_NUM_KEYS in the case of simple channel > assignments (like those in the example bindings), keycodemax must be passed to > device_property_read_u32_array which means it must be limited before-hand. The > same method seems to be used in other drivers as well (e.g. mpr121_touchkey). Ah, indeed, ignore me here please. ... > > > +MODULE_AUTHOR("Jeff LaBundy <jeff@labundy.com>"); > > > +MODULE_DESCRIPTION("Azoteq IQS620A/621/622/624/625 Keys and Switches"); > > > +MODULE_LICENSE("GPL"); > > > +MODULE_ALIAS("platform:" IQS62X_DRV_NAME_KEYS); > > > > Otherwise > > > > Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> > > > > I suppose it will be merged through MFD? > > That's the plan; Lee confirmed this would be OK once the series is ready. Just > as a heads up, I expect minor changes to this and other patches as iqs62x.h is > hardened (e.g. "iqs62x->map" --> "iqs62x->regmap"). I assume you're OK with me > keeping your Acked-by unless there are major changes, but let me know if you'd > prefer I didn't. Yes, please keep Acked-by unless there is significant rework. Thanks.
diff --git a/drivers/input/keyboard/Kconfig b/drivers/input/keyboard/Kconfig index 4706ff0..28de965 100644 --- a/drivers/input/keyboard/Kconfig +++ b/drivers/input/keyboard/Kconfig @@ -663,6 +663,16 @@ config KEYBOARD_IPAQ_MICRO To compile this driver as a module, choose M here: the module will be called ipaq-micro-keys. +config KEYBOARD_IQS62X + tristate "Azoteq IQS620A/621/622/624/625 keys and switches" + depends on MFD_IQS62X + help + Say Y here to enable key and switch support for the Azoteq IQS620A, + IQS621, IQS622, IQS624 and IQS625 multi-function sensors. + + To compile this driver as a module, choose M here: the module will + be called iqs62x-keys. + config KEYBOARD_OMAP tristate "TI OMAP keypad support" depends on ARCH_OMAP1 diff --git a/drivers/input/keyboard/Makefile b/drivers/input/keyboard/Makefile index f5b1752..1d689fd 100644 --- a/drivers/input/keyboard/Makefile +++ b/drivers/input/keyboard/Makefile @@ -28,6 +28,7 @@ obj-$(CONFIG_KEYBOARD_TCA8418) += tca8418_keypad.o obj-$(CONFIG_KEYBOARD_HIL) += hil_kbd.o obj-$(CONFIG_KEYBOARD_HIL_OLD) += hilkbd.o obj-$(CONFIG_KEYBOARD_IPAQ_MICRO) += ipaq-micro-keys.o +obj-$(CONFIG_KEYBOARD_IQS62X) += iqs62x-keys.o obj-$(CONFIG_KEYBOARD_IMX) += imx_keypad.o obj-$(CONFIG_KEYBOARD_IMX_SC_KEY) += imx_sc_key.o obj-$(CONFIG_KEYBOARD_HP6XX) += jornada680_kbd.o diff --git a/drivers/input/keyboard/iqs62x-keys.c b/drivers/input/keyboard/iqs62x-keys.c new file mode 100644 index 0000000..b477334 --- /dev/null +++ b/drivers/input/keyboard/iqs62x-keys.c @@ -0,0 +1,340 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Azoteq IQS620A/621/622/624/625 Keys and Switches + * + * Copyright (C) 2019 Jeff LaBundy <jeff@labundy.com> + */ + +#include <linux/device.h> +#include <linux/input.h> +#include <linux/kernel.h> +#include <linux/mfd/iqs62x.h> +#include <linux/module.h> +#include <linux/notifier.h> +#include <linux/platform_device.h> +#include <linux/property.h> +#include <linux/regmap.h> +#include <linux/slab.h> + +enum { + IQS62X_SW_HALL_N, + IQS62X_SW_HALL_S, +}; + +static const char * const iqs62x_switch_names[] = { + [IQS62X_SW_HALL_N] = "hall-switch-north", + [IQS62X_SW_HALL_S] = "hall-switch-south", +}; + +struct iqs62x_switch_desc { + enum iqs62x_event_flag flag; + unsigned int code; + bool enabled; +}; + +struct iqs62x_keys_private { + struct iqs62x_core *iqs62x; + struct input_dev *input; + struct notifier_block notifier; + struct iqs62x_switch_desc switches[ARRAY_SIZE(iqs62x_switch_names)]; + unsigned int keycode[IQS62X_NUM_KEYS]; + unsigned int keycodemax; + u8 interval; +}; + +static int iqs62x_keys_parse_prop(struct platform_device *pdev, + struct iqs62x_keys_private *iqs62x_keys) +{ + struct fwnode_handle *child; + unsigned int val; + int ret, i; + + ret = device_property_read_u32_array(&pdev->dev, "linux,keycodes", + NULL, 0); + if (ret > IQS62X_NUM_KEYS) { + dev_err(&pdev->dev, "Too many keycodes present\n"); + return -EINVAL; + } else if (ret < 0) { + dev_err(&pdev->dev, "Failed to count keycodes: %d\n", ret); + return ret; + } + iqs62x_keys->keycodemax = ret; + + ret = device_property_read_u32_array(&pdev->dev, "linux,keycodes", + iqs62x_keys->keycode, + iqs62x_keys->keycodemax); + if (ret) { + dev_err(&pdev->dev, "Failed to read keycodes: %d\n", ret); + return ret; + } + + for (i = 0; i < ARRAY_SIZE(iqs62x_keys->switches); i++) { + child = device_get_named_child_node(&pdev->dev, + iqs62x_switch_names[i]); + if (!child) + continue; + + ret = fwnode_property_read_u32(child, "linux,code", &val); + if (ret) { + dev_err(&pdev->dev, "Failed to read switch code: %d\n", + ret); + return ret; + } + iqs62x_keys->switches[i].code = val; + iqs62x_keys->switches[i].enabled = true; + + if (fwnode_property_present(child, "azoteq,use-prox")) + iqs62x_keys->switches[i].flag = (i == IQS62X_SW_HALL_N ? + IQS62X_EVENT_HALL_N_P : + IQS62X_EVENT_HALL_S_P); + else + iqs62x_keys->switches[i].flag = (i == IQS62X_SW_HALL_N ? + IQS62X_EVENT_HALL_N_T : + IQS62X_EVENT_HALL_S_T); + } + + return 0; +} + +static int iqs62x_keys_init(struct iqs62x_keys_private *iqs62x_keys) +{ + struct iqs62x_core *iqs62x = iqs62x_keys->iqs62x; + enum iqs62x_event_flag flag; + unsigned int event_mask_reg; + unsigned int event_mask = 0; + unsigned int val; + int ret, i; + + switch (iqs62x->dev_desc->prod_num) { + case IQS620_PROD_NUM: + case IQS621_PROD_NUM: + case IQS622_PROD_NUM: + event_mask_reg = IQS620_GLBL_EVENT_MASK; + + /* + * Discreet button, hysteresis and SAR UI flags represent keys + * and are unmasked if mapped to a valid keycode. + */ + for (i = 0; i < iqs62x_keys->keycodemax; i++) { + if (iqs62x_keys->keycode[i] == KEY_RESERVED) + continue; + + if (iqs62x_events[i].reg == IQS62X_EVENT_PROX) + event_mask |= iqs62x->dev_desc->prox_mask; + else if (iqs62x_events[i].reg == IQS62X_EVENT_HYST) + event_mask |= (iqs62x->dev_desc->hyst_mask | + iqs62x->dev_desc->sar_mask); + } + + ret = regmap_read(iqs62x->map, iqs62x->dev_desc->hall_flags, + &val); + if (ret) + return ret; + + /* + * Hall UI flags represent switches and are unmasked if their + * corresponding child nodes are present. + */ + for (i = 0; i < ARRAY_SIZE(iqs62x_keys->switches); i++) { + if (!(iqs62x_keys->switches[i].enabled)) + continue; + + flag = iqs62x_keys->switches[i].flag; + + if (iqs62x_events[flag].reg != IQS62X_EVENT_HALL) + continue; + + event_mask |= iqs62x->dev_desc->hall_mask; + + input_report_switch(iqs62x_keys->input, + iqs62x_keys->switches[i].code, + (val & iqs62x_events[flag].mask) == + iqs62x_events[flag].val); + } + + input_sync(iqs62x_keys->input); + break; + + case IQS624_PROD_NUM: + event_mask_reg = IQS624_HALL_UI; + + /* + * Interval change events represent keys and are unmasked if + * either wheel movement flag is mapped to a valid keycode. + */ + if (iqs62x_keys->keycode[IQS62X_EVENT_WHEEL_UP] != KEY_RESERVED) + event_mask |= IQS624_HALL_UI_INT_EVENT; + + if (iqs62x_keys->keycode[IQS62X_EVENT_WHEEL_DN] != KEY_RESERVED) + event_mask |= IQS624_HALL_UI_INT_EVENT; + + ret = regmap_read(iqs62x->map, iqs62x->dev_desc->interval, + &val); + if (ret) + return ret; + + iqs62x_keys->interval = val; + break; + + default: + return 0; + } + + return regmap_update_bits(iqs62x->map, event_mask_reg, event_mask, 0); +} + +static int iqs62x_keys_notifier(struct notifier_block *notifier, + unsigned long event_flags, void *context) +{ + struct iqs62x_event_data *event_data = context; + struct iqs62x_keys_private *iqs62x_keys; + int ret, i; + + iqs62x_keys = container_of(notifier, struct iqs62x_keys_private, + notifier); + + if (event_flags & BIT(IQS62X_EVENT_SYS_RESET)) { + ret = iqs62x_keys_init(iqs62x_keys); + if (ret) { + dev_err(iqs62x_keys->input->dev.parent, + "Failed to re-initialize device: %d\n", ret); + return NOTIFY_BAD; + } + + return NOTIFY_OK; + } + + for (i = 0; i < iqs62x_keys->keycodemax; i++) { + if (iqs62x_events[i].reg == IQS62X_EVENT_WHEEL && + event_data->interval == iqs62x_keys->interval) + continue; + + input_report_key(iqs62x_keys->input, iqs62x_keys->keycode[i], + event_flags & BIT(i)); + } + + for (i = 0; i < ARRAY_SIZE(iqs62x_keys->switches); i++) + if (iqs62x_keys->switches[i].enabled) + input_report_switch(iqs62x_keys->input, + iqs62x_keys->switches[i].code, + event_flags & + BIT(iqs62x_keys->switches[i].flag)); + + input_sync(iqs62x_keys->input); + + if (event_data->interval == iqs62x_keys->interval) + return NOTIFY_OK; + + /* + * Each frame contains at most one wheel event (up or down), in which + * case a complementary release cycle is emulated. + */ + if (event_flags & BIT(IQS62X_EVENT_WHEEL_UP)) { + input_report_key(iqs62x_keys->input, + iqs62x_keys->keycode[IQS62X_EVENT_WHEEL_UP], + 0); + input_sync(iqs62x_keys->input); + } else if (event_flags & BIT(IQS62X_EVENT_WHEEL_DN)) { + input_report_key(iqs62x_keys->input, + iqs62x_keys->keycode[IQS62X_EVENT_WHEEL_DN], + 0); + input_sync(iqs62x_keys->input); + } + + iqs62x_keys->interval = event_data->interval; + + return NOTIFY_OK; +} + +static int iqs62x_keys_probe(struct platform_device *pdev) +{ + struct iqs62x_core *iqs62x = dev_get_drvdata(pdev->dev.parent); + struct iqs62x_keys_private *iqs62x_keys; + struct input_dev *input; + int ret, i; + + iqs62x_keys = devm_kzalloc(&pdev->dev, sizeof(*iqs62x_keys), + GFP_KERNEL); + if (!iqs62x_keys) + return -ENOMEM; + + platform_set_drvdata(pdev, iqs62x_keys); + + ret = iqs62x_keys_parse_prop(pdev, iqs62x_keys); + if (ret) + return ret; + + input = devm_input_allocate_device(&pdev->dev); + if (!input) + return -ENOMEM; + + input->keycodemax = iqs62x_keys->keycodemax; + input->keycode = iqs62x_keys->keycode; + input->keycodesize = sizeof(*iqs62x_keys->keycode); + + input->name = iqs62x->dev_desc->dev_name; + input->id.bustype = BUS_I2C; + + __set_bit(EV_KEY, input->evbit); + + for (i = 0; i < iqs62x_keys->keycodemax; i++) + __set_bit(iqs62x_keys->keycode[i], input->keybit); + + __clear_bit(KEY_RESERVED, input->keybit); + + for (i = 0; i < ARRAY_SIZE(iqs62x_keys->switches); i++) + if (iqs62x_keys->switches[i].enabled) { + __set_bit(EV_SW, input->evbit); + __set_bit(iqs62x_keys->switches[i].code, input->swbit); + } + + iqs62x_keys->iqs62x = iqs62x; + iqs62x_keys->input = input; + + ret = iqs62x_keys_init(iqs62x_keys); + if (ret) { + dev_err(&pdev->dev, "Failed to initialize device: %d\n", ret); + return ret; + } + + ret = input_register_device(iqs62x_keys->input); + if (ret) { + dev_err(&pdev->dev, "Failed to register device: %d\n", ret); + return ret; + } + + iqs62x_keys->notifier.notifier_call = iqs62x_keys_notifier; + ret = blocking_notifier_chain_register(&iqs62x_keys->iqs62x->nh, + &iqs62x_keys->notifier); + if (ret) + dev_err(&pdev->dev, "Failed to register notifier: %d\n", ret); + + return ret; +} + +static int iqs62x_keys_remove(struct platform_device *pdev) +{ + struct iqs62x_keys_private *iqs62x_keys = platform_get_drvdata(pdev); + int ret; + + ret = blocking_notifier_chain_unregister(&iqs62x_keys->iqs62x->nh, + &iqs62x_keys->notifier); + if (ret) + dev_err(&pdev->dev, "Failed to unregister notifier: %d\n", ret); + + return ret; +} + +static struct platform_driver iqs62x_keys_platform_driver = { + .driver = { + .name = IQS62X_DRV_NAME_KEYS, + }, + .probe = iqs62x_keys_probe, + .remove = iqs62x_keys_remove, +}; +module_platform_driver(iqs62x_keys_platform_driver); + +MODULE_AUTHOR("Jeff LaBundy <jeff@labundy.com>"); +MODULE_DESCRIPTION("Azoteq IQS620A/621/622/624/625 Keys and Switches"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:" IQS62X_DRV_NAME_KEYS);
This patch adds key and switch support for the Azoteq IQS620A, IQS621, IQS622, IQS624 and IQS625 multi-function sensors. Signed-off-by: Jeff LaBundy <jeff@labundy.com> --- Changes in v4: - None Changes in v3: - None Changes in v2: - Merged 'Copyright' and 'Author' lines into one in introductory comments - Replaced 'error' with 'ret' throughout - Updated iqs62x_keys_parse_prop to use unified device property interface - Clarified the comment in iqs62x_keys_notifier to state that wheel up or down events elicit an emulated release cycle - Eliminated tabbed alignment of platform_driver struct members drivers/input/keyboard/Kconfig | 10 ++ drivers/input/keyboard/Makefile | 1 + drivers/input/keyboard/iqs62x-keys.c | 340 +++++++++++++++++++++++++++++++++++ 3 files changed, 351 insertions(+) create mode 100644 drivers/input/keyboard/iqs62x-keys.c -- 2.7.4