diff options
Diffstat (limited to 'drivers/input')
| -rw-r--r-- | drivers/input/keyboard/pxa27x_keypad.c | 60 |
1 files changed, 28 insertions, 32 deletions
diff --git a/drivers/input/keyboard/pxa27x_keypad.c b/drivers/input/keyboard/pxa27x_keypad.c index 8de35b0500f3..e9d4e227a009 100644 --- a/drivers/input/keyboard/pxa27x_keypad.c +++ b/drivers/input/keyboard/pxa27x_keypad.c @@ -37,6 +37,10 @@ #define DRIVER_NAME "pxa27x-keypad" +#define KPC_MKRN(n) ((((n) & 0x7) - 1) << 26) /* matrix key row number */ +#define KPC_MKCN(n) ((((n) & 0x7) - 1) << 23) /* matrix key column number */ +#define KPC_DKN(n) ((((n) & 0x7) - 1) << 6) /* direct key number */ + #define KPAS_MUKP(n) (((n) >> 26) & 0x1f) #define KPAS_RP(n) (((n) >> 4) & 0xf) #define KPAS_CP(n) ((n) & 0xf) @@ -145,6 +149,8 @@ scan: memcpy(keypad->matrix_key_state, new_state, sizeof(new_state)); } +#define DEFAULT_KPREC (0x007f007f) + static irqreturn_t pxa27x_keypad_irq_handler(int irq, void *dev_id) { struct pxa27x_keypad *keypad = dev_id; @@ -181,24 +187,32 @@ static irqreturn_t pxa27x_keypad_irq_handler(int irq, void *dev_id) return IRQ_HANDLED; } -static int pxa27x_keypad_open(struct input_dev *dev) +static void pxa27x_keypad_config(struct pxa27x_keypad *keypad) { - struct pxa27x_keypad *keypad = input_get_drvdata(dev); + struct pxa27x_keypad_platform_data *pdata = keypad->pdata; + unsigned long kpc = 0; - /* Set keypad control register */ - KPC |= (KPC_ASACT | - KPC_MS_ALL | - (2 << 6) | KPC_REE0 | KPC_DK_DEB_SEL | - KPC_ME | KPC_MIE | KPC_DE | KPC_DIE); + /* enable matrix keys with automatic scan */ + if (pdata->matrix_key_rows && pdata->matrix_key_cols) { + kpc |= KPC_ASACT | KPC_MIE | KPC_ME | KPC_MS_ALL; + kpc |= KPC_MKRN(pdata->matrix_key_rows) | + KPC_MKCN(pdata->matrix_key_cols); + } - KPC &= ~KPC_AS; /* disable automatic scan */ - KPC &= ~KPC_IMKP; /* do not ignore multiple keypresses */ + /* FIXME: hardcoded to enable rotary 0 _only_ */ + kpc |= KPC_DKN(2) | KPC_REE0 | KPC_DI | KPC_DIE; - /* Set rotary count to mid-point value */ - KPREC = 0x7F; + KPC = kpc; + KPREC = DEFAULT_KPREC; +} + +static int pxa27x_keypad_open(struct input_dev *dev) +{ + struct pxa27x_keypad *keypad = input_get_drvdata(dev); /* Enable unit clock */ clk_enable(keypad->clk); + pxa27x_keypad_config(keypad); return 0; } @@ -215,30 +229,22 @@ static void pxa27x_keypad_close(struct input_dev *dev) static int pxa27x_keypad_suspend(struct platform_device *pdev, pm_message_t state) { struct pxa27x_keypad *keypad = platform_get_drvdata(pdev); - struct pxa27x_keypad_platform_data *pdata = keypad->pdata; - - /* Save controller status */ - pdata->reg_kpc = KPC; - pdata->reg_kprec = KPREC; + clk_disable(keypad->clk); return 0; } static int pxa27x_keypad_resume(struct platform_device *pdev) { struct pxa27x_keypad *keypad = platform_get_drvdata(pdev); - struct pxa27x_keypad_platform_data *pdata = keypad->pdata; struct input_dev *input_dev = keypad->input_dev; mutex_lock(&input_dev->mutex); if (input_dev->users) { - /* Restore controller status */ - KPC = pdata->reg_kpc; - KPREC = pdata->reg_kprec; - /* Enable unit clock */ clk_enable(keypad->clk); + pxa27x_keypad_config(keypad); } mutex_unlock(&input_dev->mutex); @@ -254,7 +260,7 @@ static int __devinit pxa27x_keypad_probe(struct platform_device *pdev) { struct pxa27x_keypad *keypad; struct input_dev *input_dev; - int col, error; + int error; keypad = kzalloc(sizeof(struct pxa27x_keypad), GFP_KERNEL); if (keypad == NULL) { @@ -313,16 +319,6 @@ static int __devinit pxa27x_keypad_probe(struct platform_device *pdev) if (error) goto err_free_irq; - /* - * Store rows/cols info into keyboard registers. - */ - - KPC |= (keypad->pdata->matrix_key_rows - 1) << 26; - KPC |= (keypad->pdata->matrix_key_cols - 1) << 23; - - for (col = 0; col < keypad->pdata->matrix_key_cols; col++) - KPC |= KPC_MS0 << col; - return 0; err_free_irq: |