lkml.org 
[lkml]   [2019]   [Sep]   [27]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH][RESEND] input: adp5589: Make keypad support optional
Date
From: Lars-Peter Clausen <lars@metafoo.de>

On some platforms the adp5589 is used in GPIO only mode. On these platforms
we do not want to register a input device, so make that optional and only
create the input device if a keymap is supplied.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
---
drivers/input/keyboard/adp5589-keys.c | 197 +++++++++++++++-----------
1 file changed, 111 insertions(+), 86 deletions(-)

diff --git a/drivers/input/keyboard/adp5589-keys.c b/drivers/input/keyboard/adp5589-keys.c
index 4f96a4a99e5b..08bfa8b213e8 100644
--- a/drivers/input/keyboard/adp5589-keys.c
+++ b/drivers/input/keyboard/adp5589-keys.c
@@ -495,10 +495,10 @@ static int adp5589_build_gpiomap(struct adp5589_kpad *kpad,
return n_unused;
}

-static int adp5589_gpio_add(struct adp5589_kpad *kpad)
+static int adp5589_gpio_add(struct adp5589_kpad *kpad,
+ const struct adp5589_kpad_platform_data *pdata)
{
struct device *dev = &kpad->client->dev;
- const struct adp5589_kpad_platform_data *pdata = dev_get_platdata(dev);
const struct adp5589_gpio_platform_data *gpio_data = pdata->gpio_data;
int i, error;

@@ -550,10 +550,10 @@ static int adp5589_gpio_add(struct adp5589_kpad *kpad)
return 0;
}

-static void adp5589_gpio_remove(struct adp5589_kpad *kpad)
+static void adp5589_gpio_remove(struct adp5589_kpad *kpad,
+ const struct adp5589_kpad_platform_data *pdata)
{
struct device *dev = &kpad->client->dev;
- const struct adp5589_kpad_platform_data *pdata = dev_get_platdata(dev);
const struct adp5589_gpio_platform_data *gpio_data = pdata->gpio_data;
int error;

@@ -571,12 +571,14 @@ static void adp5589_gpio_remove(struct adp5589_kpad *kpad)
gpiochip_remove(&kpad->gc);
}
#else
-static inline int adp5589_gpio_add(struct adp5589_kpad *kpad)
+static inline int adp5589_gpio_add(struct adp5589_kpad *kpad,
+ struct const adp5589_kpad_platform_data *pdata)
{
return 0;
}

-static inline void adp5589_gpio_remove(struct adp5589_kpad *kpad)
+static inline void adp5589_gpio_remove(struct adp5589_kpad *kpad,
+ struct const adp5589_kpad_platform_data *pdata)
{
}
#endif
@@ -652,11 +654,10 @@ static int adp5589_get_evcode(struct adp5589_kpad *kpad, unsigned short key)
return -EINVAL;
}

-static int adp5589_setup(struct adp5589_kpad *kpad)
+static int adp5589_setup(struct adp5589_kpad *kpad,
+ const struct adp5589_kpad_platform_data *pdata)
{
struct i2c_client *client = kpad->client;
- const struct adp5589_kpad_platform_data *pdata =
- dev_get_platdata(&client->dev);
u8 (*reg) (u8) = kpad->var->reg;
unsigned char evt_mode1 = 0, evt_mode2 = 0, evt_mode3 = 0;
unsigned char pull_mask = 0;
@@ -857,70 +858,37 @@ static void adp5589_report_switch_state(struct adp5589_kpad *kpad)
input_sync(kpad->input);
}

-static int adp5589_probe(struct i2c_client *client,
- const struct i2c_device_id *id)
+static int adp5589_keypad_add(struct adp5589_kpad *kpad, unsigned int revid,
+ const struct adp5589_kpad_platform_data *pdata)
{
- struct adp5589_kpad *kpad;
- const struct adp5589_kpad_platform_data *pdata =
- dev_get_platdata(&client->dev);
+ struct i2c_client *client = kpad->client;
struct input_dev *input;
- unsigned int revid;
- int ret, i;
+ unsigned int i;
int error;

- if (!i2c_check_functionality(client->adapter,
- I2C_FUNC_SMBUS_BYTE_DATA)) {
- dev_err(&client->dev, "SMBUS Byte Data not Supported\n");
- return -EIO;
- }
-
- if (!pdata) {
- dev_err(&client->dev, "no platform data?\n");
- return -EINVAL;
- }
-
- kpad = kzalloc(sizeof(*kpad), GFP_KERNEL);
- if (!kpad)
- return -ENOMEM;
-
- switch (id->driver_data) {
- case ADP5585_02:
- kpad->support_row5 = true;
- /* fall through */
- case ADP5585_01:
- kpad->is_adp5585 = true;
- kpad->var = &const_adp5585;
- break;
- case ADP5589:
- kpad->support_row5 = true;
- kpad->var = &const_adp5589;
- break;
- }
+ if (pdata->keymapsize == 0)
+ return 0;

if (!((pdata->keypad_en_mask & kpad->var->row_mask) &&
(pdata->keypad_en_mask >> kpad->var->col_shift)) ||
!pdata->keymap) {
dev_err(&client->dev, "no rows, cols or keymap from pdata\n");
- error = -EINVAL;
- goto err_free_mem;
+ return -EINVAL;
}

if (pdata->keymapsize != kpad->var->keymapsize) {
dev_err(&client->dev, "invalid keymapsize\n");
- error = -EINVAL;
- goto err_free_mem;
+ return -EINVAL;
}

if (!pdata->gpimap && pdata->gpimapsize) {
dev_err(&client->dev, "invalid gpimap from pdata\n");
- error = -EINVAL;
- goto err_free_mem;
+ return -EINVAL;
}

if (pdata->gpimapsize > kpad->var->gpimapsize_max) {
dev_err(&client->dev, "invalid gpimapsize\n");
- error = -EINVAL;
- goto err_free_mem;
+ return -EINVAL;
}

for (i = 0; i < pdata->gpimapsize; i++) {
@@ -929,41 +897,27 @@ static int adp5589_probe(struct i2c_client *client,
if (pin < kpad->var->gpi_pin_base ||
pin > kpad->var->gpi_pin_end) {
dev_err(&client->dev, "invalid gpi pin data\n");
- error = -EINVAL;
- goto err_free_mem;
+ return -EINVAL;
}

if ((1 << (pin - kpad->var->gpi_pin_row_base)) &
pdata->keypad_en_mask) {
dev_err(&client->dev, "invalid gpi row/col data\n");
- error = -EINVAL;
- goto err_free_mem;
+ return -EINVAL;
}
}

if (!client->irq) {
dev_err(&client->dev, "no IRQ?\n");
- error = -EINVAL;
- goto err_free_mem;
+ return -EINVAL;
}

input = input_allocate_device();
- if (!input) {
- error = -ENOMEM;
- goto err_free_mem;
- }
+ if (!input)
+ return -ENOMEM;

- kpad->client = client;
kpad->input = input;

- ret = adp5589_read(client, ADP5589_5_ID);
- if (ret < 0) {
- error = ret;
- goto err_free_input;
- }
-
- revid = (u8) ret & ADP5589_5_DEVICE_ID_MASK;
-
input->name = client->name;
input->phys = "adp5589-keys/input0";
input->dev.parent = &client->dev;
@@ -1015,30 +969,94 @@ static int adp5589_probe(struct i2c_client *client,
goto err_unreg_dev;
}

- error = adp5589_setup(kpad);
+ device_init_wakeup(&client->dev, 1);
+
+ return 0;
+
+err_unreg_dev:
+ input_unregister_device(input);
+ input = NULL;
+err_free_input:
+ input_free_device(input);
+
+ return error;
+}
+
+static void adp5589_keypad_remove(struct adp5589_kpad *kpad,
+ const struct adp5589_kpad_platform_data *pdata)
+{
+ if (!kpad->input)
+ return;
+
+ free_irq(kpad->client->irq, kpad);
+ input_unregister_device(kpad->input);
+}
+
+static int adp5589_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct adp5589_kpad *kpad;
+ const struct adp5589_kpad_platform_data *pdata =
+ dev_get_platdata(&client->dev);
+ unsigned int revid;
+ int error, ret;
+
+ if (!i2c_check_functionality(client->adapter,
+ I2C_FUNC_SMBUS_BYTE_DATA)) {
+ dev_err(&client->dev, "SMBUS Byte Data not Supported\n");
+ return -EIO;
+ }
+
+
+ kpad = kzalloc(sizeof(*kpad), GFP_KERNEL);
+ if (!kpad)
+ return -ENOMEM;
+
+ kpad->client = client;
+
+ switch (id->driver_data) {
+ case ADP5585_02:
+ kpad->support_row5 = true;
+ case ADP5585_01:
+ kpad->is_adp5585 = true;
+ kpad->var = &const_adp5585;
+ break;
+ case ADP5589:
+ kpad->support_row5 = true;
+ kpad->var = &const_adp5589;
+ break;
+ }
+
+ ret = adp5589_read(client, ADP5589_5_ID);
+ if (ret < 0) {
+ error = ret;
+ goto err_free_mem;
+ }
+
+ revid = (u8) ret & ADP5589_5_DEVICE_ID_MASK;
+
+ error = adp5589_keypad_add(kpad, revid, pdata);
if (error)
- goto err_free_irq;
+ goto err_free_mem;
+
+ error = adp5589_setup(kpad, pdata);
+ if (error)
+ goto err_keypad_remove;

if (kpad->gpimapsize)
adp5589_report_switch_state(kpad);

- error = adp5589_gpio_add(kpad);
+ error = adp5589_gpio_add(kpad, pdata);
if (error)
- goto err_free_irq;
+ goto err_keypad_remove;

- device_init_wakeup(&client->dev, 1);
i2c_set_clientdata(client, kpad);

dev_info(&client->dev, "Rev.%d keypad, irq %d\n", revid, client->irq);
return 0;

-err_free_irq:
- free_irq(client->irq, kpad);
-err_unreg_dev:
- input_unregister_device(input);
- input = NULL;
-err_free_input:
- input_free_device(input);
+err_keypad_remove:
+ adp5589_keypad_remove(kpad, pdata);
err_free_mem:
kfree(kpad);

@@ -1048,11 +1066,12 @@ static int adp5589_probe(struct i2c_client *client,
static int adp5589_remove(struct i2c_client *client)
{
struct adp5589_kpad *kpad = i2c_get_clientdata(client);
+ const struct adp5589_kpad_platform_data *pdata =
+ dev_get_platdata(&client->dev);

adp5589_write(client, kpad->var->reg(ADP5589_GENERAL_CFG), 0);
- free_irq(client->irq, kpad);
- input_unregister_device(kpad->input);
- adp5589_gpio_remove(kpad);
+ adp5589_keypad_remove(kpad, pdata);
+ adp5589_gpio_remove(kpad, pdata);
kfree(kpad);

return 0;
@@ -1064,6 +1083,9 @@ static int adp5589_suspend(struct device *dev)
struct adp5589_kpad *kpad = dev_get_drvdata(dev);
struct i2c_client *client = kpad->client;

+ if (!kpad->input)
+ return 0;
+
disable_irq(client->irq);

if (device_may_wakeup(&client->dev))
@@ -1077,6 +1099,9 @@ static int adp5589_resume(struct device *dev)
struct adp5589_kpad *kpad = dev_get_drvdata(dev);
struct i2c_client *client = kpad->client;

+ if (!kpad->input)
+ return 0;
+
if (device_may_wakeup(&client->dev))
disable_irq_wake(client->irq);

--
2.20.1
\
 
 \ /
  Last update: 2019-09-27 14:39    [W:0.073 / U:6.372 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site