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Message-ID: <20090509200118.GB1617@dtor-d630.eng.vmware.com>
Date: Sat, 9 May 2009 13:01:28 -0700
From: Dmitry Torokhov <dmitry.torokhov@...il.com>
To: Trilok Soni <soni.trilok@...il.com>
Cc: Kim Kyuwon <q1.kim@...sung.com>,
LKML <linux-kernel@...r.kernel.org>, linux-input@...r.kernel.org,
Kyungmin Park <kyungmin.park@...sung.com>,
Marek Szyprowski <m.szyprowski@...sung.com>
Subject: Re: [PATCH] Input: add MAX7359 key switch controller driver, v2
On Sat, May 09, 2009 at 10:57:47PM +0530, Trilok Soni wrote:
> Hi Kim,
>
> On Sat, May 9, 2009 at 7:39 AM, Kim Kyuwon <q1.kim@...sung.com> wrote:
> > The Maxim MAX7359 is a I2C interfaced key switch controller which provides
> > microprocessors with management of up to 64 key switches.
> > This patch adds support for the MAX7359 key switch controller.
> >
> > Signed-off-by: Kim Kyuwon <q1.kim@...sung.com>
>
>
> Thanks for implementing review comments. Please add
>
> Reviewed-by: Trilok Soni <soni.trilok@...il.com>
>
Looks good, thank you Kim. I will keep it in my tree for now until I
figure out what to do with KEY() macro for matrix keyboards (should not
be long though).
Trilok, I also wanted to thank you for doing reviews of the drivers
posted on the linux-input, it is much appreciated.
--
Dmitry
P.S. I made a bunch of random changes, mostly to streamline the probe
code (below), hopfully I did not break anything.
diff --git a/drivers/input/keyboard/max7359_keypad.c b/drivers/input/keyboard/max7359_keypad.c
index 918386c..280edc3 100644
--- a/drivers/input/keyboard/max7359_keypad.c
+++ b/drivers/input/keyboard/max7359_keypad.c
@@ -70,12 +70,9 @@ static int max7359_write_reg(struct i2c_client *client, u8 reg, u8 val)
{
int ret = i2c_smbus_write_byte_data(client, reg, val);
- if (ret >= 0)
- return 0;
-
- dev_err(&client->dev, "%s: reg 0x%x, val 0x%x, err %d\n",
- __func__, reg, val, ret);
-
+ if (ret < 0)
+ dev_err(&client->dev, "%s: reg 0x%x, val 0x%x, err %d\n",
+ __func__, reg, val, ret);
return ret;
}
@@ -85,7 +82,7 @@ static int max7359_read_reg(struct i2c_client *client, int reg)
if (ret < 0)
dev_err(&client->dev, "%s: reg 0x%x, err %d\n",
- __func__, reg, ret);
+ __func__, reg, ret);
return ret;
}
@@ -93,17 +90,16 @@ static void max7359_build_keycode(struct max7359_keypad *keypad)
{
struct max7359_keypad_platform_data *pdata = keypad->pdata;
struct input_dev *input_dev = keypad->input_dev;
- unsigned int *key;
int i;
- key = pdata->key_map;
- for (i = 0; i < pdata->key_map_size; i++, key++) {
- int row = ((*key) >> 28) & 0xf;
- int col = ((*key) >> 24) & 0xf;
- short code = (*key) & 0xffff;
+ for (i = 0; i < pdata->key_map_size; i++) {
+ unsigned int key = pdata->key_map[i];
+ int row = (key >> 28) & 0xf;
+ int col = (key >> 24) & 0xf;
+ unsigned short code = key & 0xffff;
keypad->keycodes[(row << 3) + col] = code;
- set_bit(code, input_dev->keybit);
+ __set_bit(code, input_dev->keybit);
}
}
@@ -125,7 +121,8 @@ static void max7359_worker(struct work_struct *work)
release = val & 0x40;
input_report_key(keypad->input_dev,
- max7359_lookup_matrix_keycode(keypad, row, col), !release);
+ max7359_lookup_matrix_keycode(keypad, row, col),
+ !release);
input_sync(keypad->input_dev);
enable_irq(keypad->irq);
@@ -141,9 +138,6 @@ static irqreturn_t max7359_interrupt(int irq, void *dev_id)
if (!work_pending(&keypad->work)) {
disable_irq_nosync(keypad->irq);
schedule_work(&keypad->work);
- } else {
- dev_warn(&keypad->client->dev,
- "Another job is currently pending \n");
}
return IRQ_HANDLED;
@@ -204,71 +198,59 @@ static int __devinit max7359_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct max7359_keypad *keypad;
- struct max7359_keypad_platform_data *pdata;
+ struct max7359_keypad_platform_data *pdata = client->dev.platform_data;
struct input_dev *input_dev;
int ret;
+ int error;
- keypad = kzalloc(sizeof(struct max7359_keypad), GFP_KERNEL);
- if (keypad == NULL) {
- dev_err(&client->dev, "failed to allocate driver data\n");
- return -ENOMEM;
+ if (!client->irq) {
+ dev_err(&client->dev, "The irq number should not be zero\n");
+ return -EINVAL;
}
- keypad->client = client;
- pdata = keypad->pdata = client->dev.platform_data;
- i2c_set_clientdata(client, keypad);
-
/* Detect MAX7359: The initial Keys FIFO value is '0x3F' */
ret = max7359_read_reg(client, MAX7359_REG_KEYFIFO);
if (ret < 0) {
dev_err(&client->dev, "failed to detect device\n");
- goto failed_free;
- } else {
- dev_info(&client->dev, "keys FIFO is 0x%02x"
- ", succeeded in detecting device\n", ret);
+ return -ENODEV;
}
- /* Initialize MAX7359 */
- max7359_initialize(client);
+ dev_dbg(&client->dev, "keys FIFO is 0x%02x\n", ret);
- /* Create and register the input driver. */
+ keypad = kzalloc(sizeof(struct max7359_keypad), GFP_KERNEL);
input_dev = input_allocate_device();
- if (!input_dev) {
- dev_err(&client->dev, "failed to allocate input device\n");
- ret = -ENOMEM;
- goto failed_free;
+ if (!keypad || !input_dev) {
+ dev_err(&client->dev, "failed to allocate memory\n");
+ error = -ENOMEM;
+ goto failed_free_mem;
}
+ keypad->client = client;
+ keypad->pdata = pdata;
+ keypad->input_dev = input_dev;
+ keypad->irq = client->irq;
+ INIT_WORK(&keypad->work, max7359_worker);
+
input_dev->name = client->name;
input_dev->id.bustype = BUS_I2C;
input_dev->open = max7359_open;
input_dev->close = max7359_close;
input_dev->dev.parent = &client->dev;
- input_set_drvdata(input_dev, keypad);
-
input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP);
input_dev->keycodesize = sizeof(keypad->keycodes[0]);
input_dev->keycodemax = ARRAY_SIZE(keypad->keycodes);
input_dev->keycode = keypad->keycodes;
- keypad->input_dev = input_dev;
+ input_set_drvdata(input_dev, keypad);
max7359_build_keycode(keypad);
- INIT_WORK(&keypad->work, max7359_worker);
-
- keypad->irq = client->irq;
- if (!keypad->irq) {
- dev_err(&client->dev, "The irq number should not be zero\n");
- goto failed_free_dev;
- }
-
- ret = request_irq(keypad->irq, max7359_interrupt,
- IRQF_TRIGGER_LOW, client->name, keypad);
- if (ret) {
+ error = request_irq(keypad->irq, max7359_interrupt,
+ IRQF_TRIGGER_LOW, client->name, keypad);
+ if (error) {
dev_err(&client->dev, "failed to register interrupt\n");
- goto failed_free_dev;
+ goto failed_free_mem;
}
/* Register the input device */
@@ -278,16 +260,18 @@ static int __devinit max7359_probe(struct i2c_client *client,
goto failed_free_irq;
}
+ /* Initialize MAX7359 */
+ max7359_initialize(client);
+
+ i2c_set_clientdata(client, keypad);
device_init_wakeup(&client->dev, 1);
return 0;
failed_free_irq:
free_irq(keypad->irq, keypad);
-failed_free_dev:
+failed_free_mem:
input_free_device(input_dev);
-failed_free:
- i2c_set_clientdata(client, NULL);
kfree(keypad);
return ret;
}
--
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