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| author | Shiraz Hashim <shiraz.hashim@st.com> | 2012-07-08 03:00:54 +0200 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2012-07-08 03:01:51 +0200 |
| commit | f6f2efa35f6b76034e5a31a075218feaa10f1812 (patch) | |
| tree | b8bf2fcb28190c513a9263b7c48e0e73cee646f0 /drivers | |
| parent | Input: spear_keyboard - use correct io accessors (diff) | |
| download | linux-f6f2efa35f6b76034e5a31a075218feaa10f1812.tar.xz linux-f6f2efa35f6b76034e5a31a075218feaa10f1812.zip | |
Input: spear_keyboard - rename bit definitions to reflect register
Rename bit definition macros to reflect keyboard registers clearly thus
being more readable.
Signed-off-by: Shiraz Hashim <shiraz.hashim@st.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/input/keyboard/spear-keyboard.c | 52 |
1 files changed, 27 insertions, 25 deletions
diff --git a/drivers/input/keyboard/spear-keyboard.c b/drivers/input/keyboard/spear-keyboard.c index 10dda9f8e706..a51cdc75466a 100644 --- a/drivers/input/keyboard/spear-keyboard.c +++ b/drivers/input/keyboard/spear-keyboard.c @@ -27,7 +27,7 @@ #include <plat/keyboard.h> /* Keyboard Registers */ -#define MODE_REG 0x00 +#define MODE_CTL_REG 0x00 #define STATUS_REG 0x0C #define DATA_REG 0x10 #define INTR_MASK 0x54 @@ -38,22 +38,23 @@ * control register as 1010010(82MHZ) */ #define PCLK_FREQ_MSK 0xA400 /* 82 MHz */ -#define START_SCAN 0x0100 -#define SCAN_RATE_10 0x0000 -#define SCAN_RATE_20 0x0004 -#define SCAN_RATE_40 0x0008 -#define SCAN_RATE_80 0x000C -#define MODE_KEYBOARD 0x0002 -#define DATA_AVAIL 0x2 - -#define KEY_MASK 0xFF000000 -#define KEY_VALUE 0x00FFFFFF -#define ROW_MASK 0xF0 -#define COLUMN_MASK 0x0F #define NUM_ROWS 16 #define NUM_COLS 16 -#define KEY_MATRIX_SHIFT 6 +#define MODE_CTL_KEYBOARD (0x2 << 0) +#define MODE_CTL_SCAN_RATE_10 (0x0 << 2) +#define MODE_CTL_SCAN_RATE_20 (0x1 << 2) +#define MODE_CTL_SCAN_RATE_40 (0x2 << 2) +#define MODE_CTL_SCAN_RATE_80 (0x3 << 2) +#define MODE_CTL_KEYNUM_SHIFT 6 +#define MODE_CTL_START_SCAN (0x1 << 8) + +#define STATUS_DATA_AVAIL (0x1 << 1) + +#define DATA_ROW_MASK 0xF0 +#define DATA_COLUMN_MASK 0x0F + +#define ROW_SHIFT 4 struct spear_kbd { struct input_dev *input; @@ -75,7 +76,7 @@ static irqreturn_t spear_kbd_interrupt(int irq, void *dev_id) u32 sts, val; sts = readl_relaxed(kbd->io_base + STATUS_REG); - if (!(sts & DATA_AVAIL)) + if (!(sts & STATUS_DATA_AVAIL)) return IRQ_NONE; if (kbd->last_key != KEY_RESERVED) { @@ -84,7 +85,8 @@ static irqreturn_t spear_kbd_interrupt(int irq, void *dev_id) } /* following reads active (row, col) pair */ - val = readl_relaxed(kbd->io_base + DATA_REG); + val = readl_relaxed(kbd->io_base + DATA_REG) & + (DATA_ROW_MASK | DATA_COLUMN_MASK); key = kbd->keycodes[val]; input_event(input, EV_MSC, MSC_SCAN, val); @@ -112,15 +114,15 @@ static int spear_kbd_open(struct input_dev *dev) return error; /* program keyboard */ - val = SCAN_RATE_80 | MODE_KEYBOARD | PCLK_FREQ_MSK | - (kbd->mode << KEY_MATRIX_SHIFT); - writel_relaxed(val, kbd->io_base + MODE_REG); + val = MODE_CTL_SCAN_RATE_80 | MODE_CTL_KEYBOARD | PCLK_FREQ_MSK | + (kbd->mode << MODE_CTL_KEYNUM_SHIFT); + writel_relaxed(val, kbd->io_base + MODE_CTL_REG); writel_relaxed(1, kbd->io_base + STATUS_REG); /* start key scan */ - val = readl_relaxed(kbd->io_base + MODE_REG); - val |= START_SCAN; - writel_relaxed(val, kbd->io_base + MODE_REG); + val = readl_relaxed(kbd->io_base + MODE_CTL_REG); + val |= MODE_CTL_START_SCAN; + writel_relaxed(val, kbd->io_base + MODE_CTL_REG); return 0; } @@ -131,9 +133,9 @@ static void spear_kbd_close(struct input_dev *dev) u32 val; /* stop key scan */ - val = readl_relaxed(kbd->io_base + MODE_REG); - val &= ~START_SCAN; - writel_relaxed(val, kbd->io_base + MODE_REG); + val = readl_relaxed(kbd->io_base + MODE_CTL_REG); + val &= ~MODE_CTL_START_SCAN; + writel_relaxed(val, kbd->io_base + MODE_CTL_REG); clk_disable(kbd->clk); |