lkml.org 
[lkml]   [2013]   [Feb]   [18]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH] mfd: support stmpe1801 18 bits enhanced port expander
Date
Provides support for 1801 variant of stmpe gpio port expanders.
This chip has 18 gpios configurable as GPI, GPO, keypad matrix,
special key or dedicated key function.

Note that special/dedicated key function is not supported yet.

Change-Id: I6ea89af7b96e9a02478ebec3467291e7d7c510c9
Signed-off-by: Jean-Nicolas Graux <jean-nicolas.graux@stericsson.com>
---
drivers/gpio/gpio-stmpe.c | 52 +++++--
drivers/input/keyboard/stmpe-keypad.c | 267 ++++++++++++++++++++++++++-------
drivers/mfd/Kconfig | 1 +
drivers/mfd/stmpe-i2c.c | 1 +
drivers/mfd/stmpe.c | 97 +++++++++++-
drivers/mfd/stmpe.h | 49 ++++++
include/linux/mfd/stmpe.h | 3 +
7 files changed, 398 insertions(+), 72 deletions(-)

diff --git a/drivers/gpio/gpio-stmpe.c b/drivers/gpio/gpio-stmpe.c
index 770476a..343dfe1 100644
--- a/drivers/gpio/gpio-stmpe.c
+++ b/drivers/gpio/gpio-stmpe.c
@@ -45,14 +45,25 @@ static inline struct stmpe_gpio *to_stmpe_gpio(struct gpio_chip *chip)
return container_of(chip, struct stmpe_gpio, chip);
}

+static inline u8 stmpe_gpio_reg(struct stmpe *stmpe, u8 index, int offset)
+{
+ u8 reg;
+ if (stmpe->partnum == STMPE1801)
+ reg = stmpe->regs[index] + offset;
+ else
+ reg = stmpe->regs[index] - offset;
+ return reg;
+}
+
static int stmpe_gpio_get(struct gpio_chip *chip, unsigned offset)
{
struct stmpe_gpio *stmpe_gpio = to_stmpe_gpio(chip);
struct stmpe *stmpe = stmpe_gpio->stmpe;
- u8 reg = stmpe->regs[STMPE_IDX_GPMR_LSB] - (offset / 8);
- u8 mask = 1 << (offset % 8);
int ret;
+ u8 reg, mask;

+ reg = stmpe_gpio_reg(stmpe, STMPE_IDX_GPMR_LSB, offset / 8);
+ mask = 1 << (offset % 8);
ret = stmpe_reg_read(stmpe, reg);
if (ret < 0)
return ret;
@@ -65,8 +76,10 @@ static void stmpe_gpio_set(struct gpio_chip *chip, unsigned offset, int val)
struct stmpe_gpio *stmpe_gpio = to_stmpe_gpio(chip);
struct stmpe *stmpe = stmpe_gpio->stmpe;
int which = val ? STMPE_IDX_GPSR_LSB : STMPE_IDX_GPCR_LSB;
- u8 reg = stmpe->regs[which] - (offset / 8);
- u8 mask = 1 << (offset % 8);
+ u8 reg, mask;
+
+ reg = stmpe_gpio_reg(stmpe, which, offset / 8);
+ mask = 1 << (offset % 8);

/*
* Some variants have single register for gpio set/clear functionality.
@@ -83,8 +96,10 @@ static int stmpe_gpio_direction_output(struct gpio_chip *chip,
{
struct stmpe_gpio *stmpe_gpio = to_stmpe_gpio(chip);
struct stmpe *stmpe = stmpe_gpio->stmpe;
- u8 reg = stmpe->regs[STMPE_IDX_GPDR_LSB] - (offset / 8);
- u8 mask = 1 << (offset % 8);
+ u8 reg, mask;
+
+ reg = stmpe_gpio_reg(stmpe, STMPE_IDX_GPDR_LSB, offset / 8);
+ mask = 1 << (offset % 8);

stmpe_gpio_set(chip, offset, val);

@@ -96,8 +111,10 @@ static int stmpe_gpio_direction_input(struct gpio_chip *chip,
{
struct stmpe_gpio *stmpe_gpio = to_stmpe_gpio(chip);
struct stmpe *stmpe = stmpe_gpio->stmpe;
- u8 reg = stmpe->regs[STMPE_IDX_GPDR_LSB] - (offset / 8);
- u8 mask = 1 << (offset % 8);
+ u8 reg, mask;
+
+ reg = stmpe_gpio_reg(stmpe, STMPE_IDX_GPDR_LSB, offset / 8);
+ mask = 1 << (offset % 8);

return stmpe_set_bits(stmpe, reg, mask, 0);
}
@@ -177,6 +194,7 @@ static void stmpe_gpio_irq_sync_unlock(struct irq_data *d)
[REG_IE] = STMPE_IDX_IEGPIOR_LSB,
};
int i, j;
+ u8 reg;

for (i = 0; i < CACHE_NR_REGS; i++) {
/* STMPE801 doesn't have RE and FE registers */
@@ -192,7 +210,8 @@ static void stmpe_gpio_irq_sync_unlock(struct irq_data *d)
continue;

stmpe_gpio->oldregs[i][j] = new;
- stmpe_reg_write(stmpe, stmpe->regs[regmap[i]] - j, new);
+ reg = stmpe_gpio_reg(stmpe, regmap[i], j);
+ stmpe_reg_write(stmpe, reg, new);
}
}

@@ -232,18 +251,20 @@ static irqreturn_t stmpe_gpio_irq(int irq, void *dev)
{
struct stmpe_gpio *stmpe_gpio = dev;
struct stmpe *stmpe = stmpe_gpio->stmpe;
- u8 statmsbreg = stmpe->regs[STMPE_IDX_ISGPIOR_MSB];
int num_banks = DIV_ROUND_UP(stmpe->num_gpios, 8);
u8 status[num_banks];
int ret;
int i;
+ bool lsb = stmpe->partnum == STMPE1801;
+ u8 statmsbreg = lsb ? stmpe->regs[STMPE_IDX_ISGPIOR_LSB] :
+ stmpe->regs[STMPE_IDX_ISGPIOR_MSB];

ret = stmpe_block_read(stmpe, statmsbreg, num_banks, status);
if (ret < 0)
return IRQ_NONE;

for (i = 0; i < num_banks; i++) {
- int bank = num_banks - i - 1;
+ int bank = lsb ? i : num_banks - i - 1;
unsigned int enabled = stmpe_gpio->regs[REG_IE][bank];
unsigned int stat = status[i];

@@ -262,10 +283,11 @@ static irqreturn_t stmpe_gpio_irq(int irq, void *dev)

stmpe_reg_write(stmpe, statmsbreg + i, status[i]);

- /* Edge detect register is not present on 801 */
- if (stmpe->partnum != STMPE801)
- stmpe_reg_write(stmpe, stmpe->regs[STMPE_IDX_GPEDR_MSB]
- + i, status[i]);
+ /* Edge detect register is not present on 801 and 1801 */
+ if (stmpe->partnum != STMPE801 && stmpe->partnum != STMPE1801)
+ stmpe_reg_write(stmpe,
+ stmpe->regs[STMPE_IDX_GPEDR_MSB] + i,
+ status[i]);
}

return IRQ_HANDLED;
diff --git a/drivers/input/keyboard/stmpe-keypad.c b/drivers/input/keyboard/stmpe-keypad.c
index 5cbec56..fb973c8 100644
--- a/drivers/input/keyboard/stmpe-keypad.c
+++ b/drivers/input/keyboard/stmpe-keypad.c
@@ -14,40 +14,107 @@
#include <linux/input/matrix_keypad.h>
#include <linux/mfd/stmpe.h>

-/* These are at the same addresses in all STMPE variants */
-#define STMPE_KPC_COL 0x60
-#define STMPE_KPC_ROW_MSB 0x61
-#define STMPE_KPC_ROW_LSB 0x62
-#define STMPE_KPC_CTRL_MSB 0x63
-#define STMPE_KPC_CTRL_LSB 0x64
-#define STMPE_KPC_COMBI_KEY_0 0x65
-#define STMPE_KPC_COMBI_KEY_1 0x66
-#define STMPE_KPC_COMBI_KEY_2 0x67
-#define STMPE_KPC_DATA_BYTE0 0x68
-#define STMPE_KPC_DATA_BYTE1 0x69
-#define STMPE_KPC_DATA_BYTE2 0x6a
-#define STMPE_KPC_DATA_BYTE3 0x6b
-#define STMPE_KPC_DATA_BYTE4 0x6c
+/* These are at the same addresses in most of STMPE variants */
+#define STMPE_REG_KPC_COL 0x60
+#define STMPE_REG_KPC_ROW_MSB 0x61
+#define STMPE_REG_KPC_ROW_LSB 0x62
+#define STMPE_REG_KPC_CTRL_MSB 0x63
+#define STMPE_REG_KPC_CTRL_LSB 0x64
+#define STMPE_REG_KPC_COMBI_KEY_0 0x65
+#define STMPE_REG_KPC_COMBI_KEY_1 0x66
+#define STMPE_REG_KPC_COMBI_KEY_2 0x67
+#define STMPE_REG_KPC_DATA_BYTE0 0x68
+#define STMPE_REG_KPC_DATA_BYTE1 0x69
+#define STMPE_REG_KPC_DATA_BYTE2 0x6a
+#define STMPE_REG_KPC_DATA_BYTE3 0x6b
+#define STMPE_REG_KPC_DATA_BYTE4 0x6c

#define STMPE_KPC_CTRL_LSB_SCAN (0x1 << 0)
#define STMPE_KPC_CTRL_LSB_DEBOUNCE (0x7f << 1)
#define STMPE_KPC_CTRL_MSB_SCAN_COUNT (0xf << 4)

+/* STMPE1801 */
+#define STMPE1801_REG_KPC_ROW 0x30
+#define STMPE1801_REG_KPC_COL_LOW 0x31
+#define STMPE1801_REG_KPC_COL_HIGH 0x32
+#define STMPE1801_REG_KPC_CTRL_LOW 0x33
+#define STMPE1801_REG_KPC_CTRL_MID 0x34
+#define STMPE1801_REG_KPC_CTRL_HIGH 0x35
+#define STMPE1801_REG_KPC_CMD 0x36
+#define STMPE1801_REG_KPC_COMBI_KEY_0 0x37
+#define STMPE1801_REG_KPC_COMBI_KEY_1 0x38
+#define STMPE1801_REG_KPC_COMBI_KEY_2 0x39
+#define STMPE1801_REG_KPC_DATA_BYTE0 0x3a
+#define STMPE1801_REG_KPC_DATA_BYTE1 0x3b
+#define STMPE1801_REG_KPC_DATA_BYTE2 0x3c
+#define STMPE1801_REG_KPC_DATA_BYTE3 0x3d
+#define STMPE1801_REG_KPC_DATA_BYTE4 0x3e
+
+#define STMPE1801_MSK_KPC_SCAN_COUNT (0xf << 4)
+#define STMPE1801_MSK_KPC_DEBOUNCE (0x3f << 2)
+#define STMPE1801_MSK_KPC_CMD_SCAN (0x1 << 0)
+
#define STMPE_KPC_ROW_MSB_ROWS 0xff

#define STMPE_KPC_DATA_UP (0x1 << 7)
-#define STMPE_KPC_DATA_ROW (0xf << 3)
-#define STMPE_KPC_DATA_COL (0x7 << 0)
+
#define STMPE_KPC_DATA_NOKEY_MASK 0x78

#define STMPE_KEYPAD_MAX_DEBOUNCE 127
#define STMPE_KEYPAD_MAX_SCAN_COUNT 15

-#define STMPE_KEYPAD_MAX_ROWS 8
-#define STMPE_KEYPAD_MAX_COLS 8
-#define STMPE_KEYPAD_ROW_SHIFT 3
-#define STMPE_KEYPAD_KEYMAP_SIZE \
- (STMPE_KEYPAD_MAX_ROWS * STMPE_KEYPAD_MAX_COLS)
+enum {
+ STMPE_IDX_KPC_COL_LSB,
+ STMPE_IDX_KPC_COL_MSB,
+ STMPE_IDX_KPC_ROW_LSB,
+ STMPE_IDX_KPC_ROW_MSB,
+ STMPE_IDX_KPC_CTRL_LSB,
+ STMPE_IDX_KPC_CTRL_MID,
+ STMPE_IDX_KPC_CTRL_MSB,
+ STMPE_IDX_KPC_CMD,
+ STMPE_IDX_KPC_COMBI_KEY_0,
+ STMPE_IDX_KPC_COMBI_KEY_1,
+ STMPE_IDX_KPC_COMBI_KEY_2,
+ STMPE_IDX_KPC_DATA_BYTE0,
+ STMPE_IDX_KPC_DATA_BYTE1,
+ STMPE_IDX_KPC_DATA_BYTE2,
+ STMPE_IDX_KPC_DATA_BYTE3,
+ STMPE_IDX_KPC_DATA_BYTE4,
+};
+
+static const u8 stmpe_default_regs[] = {
+ [STMPE_IDX_KPC_COL_LSB] = STMPE_REG_KPC_COL,
+ [STMPE_IDX_KPC_ROW_LSB] = STMPE_REG_KPC_ROW_LSB,
+ [STMPE_IDX_KPC_ROW_MSB] = STMPE_REG_KPC_ROW_MSB,
+ [STMPE_IDX_KPC_CTRL_LSB] = STMPE_REG_KPC_CTRL_LSB,
+ [STMPE_IDX_KPC_CTRL_MSB] = STMPE_REG_KPC_CTRL_MSB,
+ [STMPE_IDX_KPC_COMBI_KEY_0] = STMPE_REG_KPC_COMBI_KEY_0,
+ [STMPE_IDX_KPC_COMBI_KEY_1] = STMPE_REG_KPC_COMBI_KEY_1,
+ [STMPE_IDX_KPC_COMBI_KEY_2] = STMPE_REG_KPC_COMBI_KEY_2,
+ [STMPE_IDX_KPC_DATA_BYTE0] = STMPE_REG_KPC_DATA_BYTE0,
+ [STMPE_IDX_KPC_DATA_BYTE1] = STMPE_REG_KPC_DATA_BYTE1,
+ [STMPE_IDX_KPC_DATA_BYTE2] = STMPE_REG_KPC_DATA_BYTE2,
+ [STMPE_IDX_KPC_DATA_BYTE3] = STMPE_REG_KPC_DATA_BYTE3,
+ [STMPE_IDX_KPC_DATA_BYTE4] = STMPE_REG_KPC_DATA_BYTE4,
+};
+
+static const u8 stmpe_1801_regs[] = {
+ [STMPE_IDX_KPC_COL_LSB] = STMPE1801_REG_KPC_COL_LOW,
+ [STMPE_IDX_KPC_COL_MSB] = STMPE1801_REG_KPC_COL_HIGH,
+ [STMPE_IDX_KPC_ROW_LSB] = STMPE1801_REG_KPC_ROW,
+ [STMPE_IDX_KPC_CTRL_LSB] = STMPE1801_REG_KPC_CTRL_LOW,
+ [STMPE_IDX_KPC_CTRL_MID] = STMPE1801_REG_KPC_CTRL_MID,
+ [STMPE_IDX_KPC_CTRL_MSB] = STMPE1801_REG_KPC_CTRL_HIGH,
+ [STMPE_IDX_KPC_CMD] = STMPE1801_REG_KPC_CMD,
+ [STMPE_IDX_KPC_COMBI_KEY_0] = STMPE1801_REG_KPC_COMBI_KEY_0,
+ [STMPE_IDX_KPC_COMBI_KEY_1] = STMPE1801_REG_KPC_COMBI_KEY_1,
+ [STMPE_IDX_KPC_COMBI_KEY_2] = STMPE1801_REG_KPC_COMBI_KEY_2,
+ [STMPE_IDX_KPC_DATA_BYTE0] = STMPE1801_REG_KPC_DATA_BYTE0,
+ [STMPE_IDX_KPC_DATA_BYTE1] = STMPE1801_REG_KPC_DATA_BYTE1,
+ [STMPE_IDX_KPC_DATA_BYTE2] = STMPE1801_REG_KPC_DATA_BYTE2,
+ [STMPE_IDX_KPC_DATA_BYTE3] = STMPE1801_REG_KPC_DATA_BYTE3,
+ [STMPE_IDX_KPC_DATA_BYTE4] = STMPE1801_REG_KPC_DATA_BYTE4,
+};

/**
* struct stmpe_keypad_variant - model-specific attributes
@@ -57,6 +124,10 @@
* @num_normal_data: number of normal keys' data bytes
* @max_cols: maximum number of columns supported
* @max_rows: maximum number of rows supported
+ * @row_mask: mask used to get row number in KPC_DATA_BYTEx registers
+ * @col_mask: mask used to get column number in KPC_DATA_BYTEx registers
+ * @row_shift: shift used to get row number in KPC_DATA_BYTEx registers
+ * @col_shift: shift used to get column number in KPC_DATA_BYTEx registers
* @col_gpios: bitmask of gpios which can be used for columns
* @row_gpios: bitmask of gpios which can be used for rows
*/
@@ -66,8 +137,13 @@ struct stmpe_keypad_variant {
int num_normal_data;
int max_cols;
int max_rows;
+ unsigned int row_mask;
+ unsigned int col_mask;
+ unsigned char row_shift;
+ unsigned char col_shift;
unsigned int col_gpios;
unsigned int row_gpios;
+ const u8 *regs;
};

static const struct stmpe_keypad_variant stmpe_keypad_variants[] = {
@@ -77,8 +153,27 @@ static const struct stmpe_keypad_variant stmpe_keypad_variants[] = {
.num_normal_data = 3,
.max_cols = 8,
.max_rows = 8,
+ .row_mask = (0xf << 3),
+ .row_shift = 3,
+ .col_mask = (0x7 << 0),
+ .col_shift = 0,
.col_gpios = 0x000ff, /* GPIO 0 - 7 */
.row_gpios = 0x0ff00, /* GPIO 8 - 15 */
+ .regs = stmpe_default_regs,
+ },
+ [STMPE1801] = {
+ .auto_increment = true,
+ .num_data = 5,
+ .num_normal_data = 3,
+ .max_cols = 10,
+ .max_rows = 8,
+ .row_mask = (0x7 << 0),
+ .row_shift = 0,
+ .col_mask = (0xf << 3),
+ .col_shift = 3,
+ .col_gpios = 0x3ff00, /* GPIO 8 - 17 */
+ .row_gpios = 0x000ff, /* GPIO 0 - 7 */
+ .regs = stmpe_1801_regs,
},
[STMPE2401] = {
.auto_increment = false,
@@ -86,8 +181,13 @@ static const struct stmpe_keypad_variant stmpe_keypad_variants[] = {
.num_normal_data = 2,
.max_cols = 8,
.max_rows = 12,
+ .row_mask = (0xf << 3),
+ .row_shift = 3,
+ .col_mask = (0x7 << 0),
+ .col_shift = 0,
.col_gpios = 0x0000ff, /* GPIO 0 - 7*/
.row_gpios = 0x1fef00, /* GPIO 8-14, 16-20 */
+ .regs = stmpe_default_regs,
},
[STMPE2403] = {
.auto_increment = true,
@@ -95,8 +195,13 @@ static const struct stmpe_keypad_variant stmpe_keypad_variants[] = {
.num_normal_data = 3,
.max_cols = 8,
.max_rows = 12,
+ .row_mask = (0xf << 3),
+ .row_shift = 3,
+ .col_mask = (0x7 << 0),
+ .col_shift = 0,
.col_gpios = 0x0000ff, /* GPIO 0 - 7*/
.row_gpios = 0x1fef00, /* GPIO 8-14, 16-20 */
+ .regs = stmpe_default_regs,
},
};

@@ -108,8 +213,8 @@ struct stmpe_keypad {

unsigned int rows;
unsigned int cols;
-
- unsigned short keymap[STMPE_KEYPAD_KEYMAP_SIZE];
+ unsigned char scan_code_row_shift;
+ unsigned short *keymap;
};

static int stmpe_keypad_read_data(struct stmpe_keypad *keypad, u8 *data)
@@ -120,11 +225,13 @@ static int stmpe_keypad_read_data(struct stmpe_keypad *keypad, u8 *data)
int i;

if (variant->auto_increment)
- return stmpe_block_read(stmpe, STMPE_KPC_DATA_BYTE0,
- variant->num_data, data);
+ return stmpe_block_read(stmpe,
+ variant->regs[STMPE_IDX_KPC_DATA_BYTE0],
+ variant->num_data, data);

for (i = 0; i < variant->num_data; i++) {
- ret = stmpe_reg_read(stmpe, STMPE_KPC_DATA_BYTE0 + i);
+ ret = stmpe_reg_read(stmpe,
+ variant->regs[STMPE_IDX_KPC_DATA_BYTE0] + i);
if (ret < 0)
return ret;

@@ -149,9 +256,10 @@ static irqreturn_t stmpe_keypad_irq(int irq, void *dev)

for (i = 0; i < variant->num_normal_data; i++) {
u8 data = fifo[i];
- int row = (data & STMPE_KPC_DATA_ROW) >> 3;
- int col = data & STMPE_KPC_DATA_COL;
- int code = MATRIX_SCAN_CODE(row, col, STMPE_KEYPAD_ROW_SHIFT);
+ int row = (data & variant->row_mask) >> variant->row_shift;
+ int col = (data & variant->col_mask) >> variant->col_shift;
+ int code = MATRIX_SCAN_CODE(row, col,
+ keypad->scan_code_row_shift);
bool up = data & STMPE_KPC_DATA_UP;

if ((data & STMPE_KPC_DATA_NOKEY_MASK)
@@ -228,43 +336,79 @@ static int stmpe_keypad_chip_init(struct stmpe_keypad *keypad)
if (ret < 0)
return ret;

- ret = stmpe_reg_write(stmpe, STMPE_KPC_COL, keypad->cols);
+ ret = stmpe_reg_write(stmpe, variant->regs[STMPE_IDX_KPC_COL_LSB],
+ keypad->cols);
if (ret < 0)
return ret;

- ret = stmpe_reg_write(stmpe, STMPE_KPC_ROW_LSB, keypad->rows);
+ if (stmpe->partnum == STMPE1801 && variant->max_cols > 8) {
+ ret = stmpe_set_bits(stmpe,
+ variant->regs[STMPE_IDX_KPC_COL_MSB],
+ 0x3,
+ keypad->cols >> 8);
+ if (ret < 0)
+ return ret;
+ }
+
+ ret = stmpe_reg_write(stmpe, variant->regs[STMPE_IDX_KPC_ROW_LSB],
+ keypad->rows);
if (ret < 0)
return ret;

if (variant->max_rows > 8) {
- ret = stmpe_set_bits(stmpe, STMPE_KPC_ROW_MSB,
- STMPE_KPC_ROW_MSB_ROWS,
- keypad->rows >> 8);
+ ret = stmpe_set_bits(stmpe,
+ variant->regs[STMPE_IDX_KPC_ROW_MSB],
+ STMPE_KPC_ROW_MSB_ROWS,
+ keypad->rows >> 8);
if (ret < 0)
return ret;
}

- ret = stmpe_set_bits(stmpe, STMPE_KPC_CTRL_MSB,
- STMPE_KPC_CTRL_MSB_SCAN_COUNT,
- plat->scan_count << 4);
- if (ret < 0)
- return ret;
+ if (stmpe->partnum == STMPE1801) {
+ ret = stmpe_set_bits(stmpe,
+ variant->regs[STMPE_IDX_KPC_CTRL_LSB],
+ STMPE1801_MSK_KPC_SCAN_COUNT,
+ plat->scan_count << 4);
+ if (ret < 0)
+ return ret;
+
+ ret = stmpe_set_bits(stmpe,
+ variant->regs[STMPE_IDX_KPC_CTRL_MID],
+ STMPE1801_MSK_KPC_DEBOUNCE,
+ (plat->debounce_ms << 1));
+ if (ret < 0)
+ return ret;
+
+ return stmpe_set_bits(stmpe,
+ variant->regs[STMPE_IDX_KPC_CMD],
+ STMPE1801_MSK_KPC_CMD_SCAN,
+ STMPE1801_MSK_KPC_CMD_SCAN);
+ } else {
+ ret = stmpe_set_bits(stmpe,
+ variant->regs[STMPE_IDX_KPC_CTRL_MSB],
+ STMPE_KPC_CTRL_MSB_SCAN_COUNT,
+ plat->scan_count << 4);
+ if (ret < 0)
+ return ret;
+
+ return stmpe_set_bits(stmpe,
+ variant->regs[STMPE_IDX_KPC_CTRL_LSB],
+ STMPE_KPC_CTRL_LSB_SCAN |
+ STMPE_KPC_CTRL_LSB_DEBOUNCE,
+ STMPE_KPC_CTRL_LSB_SCAN |
+ (plat->debounce_ms << 1));
+ }

- return stmpe_set_bits(stmpe, STMPE_KPC_CTRL_LSB,
- STMPE_KPC_CTRL_LSB_SCAN |
- STMPE_KPC_CTRL_LSB_DEBOUNCE,
- STMPE_KPC_CTRL_LSB_SCAN |
- (plat->debounce_ms << 1));
}

static void stmpe_keypad_fill_used_pins(struct stmpe_keypad *keypad)
{
int row, col;

- for (row = 0; row < STMPE_KEYPAD_MAX_ROWS; row++) {
- for (col = 0; col < STMPE_KEYPAD_MAX_COLS; col++) {
+ for (row = 0; row < keypad->variant->max_rows; row++) {
+ for (col = 0; col < keypad->variant->max_cols; col++) {
int code = MATRIX_SCAN_CODE(row, col,
- STMPE_KEYPAD_ROW_SHIFT);
+ keypad->scan_code_row_shift);
if (keypad->keymap[code] != KEY_RESERVED) {
keypad->rows |= 1 << row;
keypad->cols |= 1 << col;
@@ -335,23 +479,34 @@ static int stmpe_keypad_probe(struct platform_device *pdev)
input->id.bustype = BUS_I2C;
input->dev.parent = &pdev->dev;

- error = matrix_keypad_build_keymap(plat->keymap_data, NULL,
- STMPE_KEYPAD_MAX_ROWS,
- STMPE_KEYPAD_MAX_COLS,
- keypad->keymap, input);
- if (error)
- return error;
-
input_set_capability(input, EV_MSC, MSC_SCAN);
if (!plat->no_autorepeat)
__set_bit(EV_REP, input->evbit);

- stmpe_keypad_fill_used_pins(keypad);
-
keypad->stmpe = stmpe;
keypad->plat = plat;
keypad->input = input;
keypad->variant = &stmpe_keypad_variants[stmpe->partnum];
+ keypad->keymap = devm_kzalloc(&pdev->dev,
+ sizeof(keypad->keymap) * keypad->variant->max_rows *
+ keypad->variant->max_cols, GFP_KERNEL);
+ if (!keypad->keymap)
+ return -ENOMEM;
+
+ error = matrix_keypad_build_keymap(plat->keymap_data, NULL,
+ keypad->variant->max_rows,
+ keypad->variant->max_cols,
+ keypad->keymap, input);
+ if (error)
+ return error;
+
+ /*
+ * compute keypad->scan_code_row_shift by figuring out
+ * how many bits are needed to encode keypad->variant->max_cols
+ */
+ keypad->scan_code_row_shift =
+ get_count_order(keypad->variant->max_cols);
+ stmpe_keypad_fill_used_pins(keypad);

error = stmpe_keypad_chip_init(keypad);
if (error < 0)
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index ff553ba..5cf8371 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -360,6 +360,7 @@ config MFD_STMPE

STMPE811: GPIO, Touchscreen
STMPE1601: GPIO, Keypad
+ STMPE1801: GPIO, Keypad
STMPE2401: GPIO, Keypad
STMPE2403: GPIO, Keypad

diff --git a/drivers/mfd/stmpe-i2c.c b/drivers/mfd/stmpe-i2c.c
index fd5fcb6..0da02e1 100644
--- a/drivers/mfd/stmpe-i2c.c
+++ b/drivers/mfd/stmpe-i2c.c
@@ -75,6 +75,7 @@ static const struct i2c_device_id stmpe_i2c_id[] = {
{ "stmpe801", STMPE801 },
{ "stmpe811", STMPE811 },
{ "stmpe1601", STMPE1601 },
+ { "stmpe1801", STMPE1801 },
{ "stmpe2401", STMPE2401 },
{ "stmpe2403", STMPE2403 },
{ }
diff --git a/drivers/mfd/stmpe.c b/drivers/mfd/stmpe.c
index 4b11202..484a7cb 100644
--- a/drivers/mfd/stmpe.c
+++ b/drivers/mfd/stmpe.c
@@ -19,6 +19,7 @@
#include <linux/pm.h>
#include <linux/slab.h>
#include <linux/mfd/core.h>
+#include <linux/delay.h>
#include "stmpe.h"

static int __stmpe_enable(struct stmpe *stmpe, unsigned int blocks)
@@ -643,6 +644,88 @@ static struct stmpe_variant_info stmpe1601 = {
};

/*
+ * STMPE1801
+ */
+static const u8 stmpe1801_regs[] = {
+ [STMPE_IDX_CHIP_ID] = STMPE1801_REG_CHIP_ID,
+ [STMPE_IDX_ICR_LSB] = STMPE1801_REG_INT_CTRL_LOW,
+ [STMPE_IDX_IER_LSB] = STMPE1801_REG_INT_EN_MASK_LOW,
+ [STMPE_IDX_ISR_LSB] = STMPE1801_REG_INT_STA_LOW,
+ [STMPE_IDX_GPMR_LSB] = STMPE1801_REG_GPIO_MP_LOW,
+ [STMPE_IDX_GPSR_LSB] = STMPE1801_REG_GPIO_SET_LOW,
+ [STMPE_IDX_GPCR_LSB] = STMPE1801_REG_GPIO_CLR_LOW,
+ [STMPE_IDX_GPDR_LSB] = STMPE1801_REG_GPIO_SET_DIR_LOW,
+ [STMPE_IDX_GPRER_LSB] = STMPE1801_REG_GPIO_RE_LOW,
+ [STMPE_IDX_GPFER_LSB] = STMPE1801_REG_GPIO_FE_LOW,
+ [STMPE_IDX_IEGPIOR_LSB] = STMPE1801_REG_INT_EN_GPIO_MASK_LOW,
+ [STMPE_IDX_ISGPIOR_LSB] = STMPE1801_REG_INT_STA_GPIO_LOW,
+};
+
+static struct stmpe_variant_block stmpe1801_blocks[] = {
+ {
+ .cell = &stmpe_gpio_cell,
+ .irq = STMPE1801_IRQ_GPIOC,
+ .block = STMPE_BLOCK_GPIO,
+ },
+ {
+ .cell = &stmpe_keypad_cell,
+ .irq = STMPE1801_IRQ_KEYPAD,
+ .block = STMPE_BLOCK_KEYPAD,
+ },
+};
+
+static int stmpe1801_enable(struct stmpe *stmpe, unsigned int blocks,
+ bool enable)
+{
+ unsigned int mask = 0;
+ if (blocks & STMPE_BLOCK_GPIO)
+ mask |= STMPE1801_MSK_INT_EN_GPIO;
+
+ if (blocks & STMPE_BLOCK_KEYPAD)
+ mask |= STMPE1801_MSK_INT_EN_KPC;
+
+ return __stmpe_set_bits(stmpe, STMPE1801_REG_INT_EN_MASK_LOW, mask,
+ enable ? mask : 0);
+}
+
+static int stmpe1801_reset(struct stmpe *stmpe)
+{
+ unsigned long timeout;
+ int ret = 0;
+
+ ret = __stmpe_set_bits(stmpe, STMPE1801_REG_SYS_CTRL,
+ STMPE1801_MSK_SYS_CTRL_RESET, STMPE1801_MSK_SYS_CTRL_RESET);
+ if (ret < 0)
+ return ret;
+
+ timeout = jiffies + msecs_to_jiffies(100);
+ while (time_before(jiffies, timeout)) {
+ ret = __stmpe_reg_read(stmpe, STMPE1801_REG_SYS_CTRL);
+ if (ret < 0)
+ return ret;
+ if (!(ret & STMPE1801_MSK_SYS_CTRL_RESET))
+ return 0;
+ usleep_range(100, 200);
+ };
+ return -EIO;
+}
+
+static struct stmpe_variant_info stmpe1801 = {
+ .name = "stmpe1801",
+ .id_val = STMPE1801_ID,
+ .id_mask = 0xfff0,
+ .num_gpios = 18,
+ .af_bits = 0,
+ .regs = stmpe1801_regs,
+ .blocks = stmpe1801_blocks,
+ .num_blocks = ARRAY_SIZE(stmpe1801_blocks),
+ .num_irqs = STMPE1801_NR_INTERNAL_IRQS,
+ .enable = stmpe1801_enable,
+ /* stmpe1801 do not have any gpio alternate function */
+ .get_altfunc = NULL,
+};
+
+/*
* STMPE24XX
*/

@@ -740,6 +823,7 @@ static struct stmpe_variant_info *stmpe_variant_info[STMPE_NBR_PARTS] = {
[STMPE801] = &stmpe801,
[STMPE811] = &stmpe811,
[STMPE1601] = &stmpe1601,
+ [STMPE1801] = &stmpe1801,
[STMPE2401] = &stmpe2401,
[STMPE2403] = &stmpe2403,
};
@@ -759,7 +843,7 @@ static irqreturn_t stmpe_irq(int irq, void *data)
struct stmpe *stmpe = data;
struct stmpe_variant_info *variant = stmpe->variant;
int num = DIV_ROUND_UP(variant->num_irqs, 8);
- u8 israddr = stmpe->regs[STMPE_IDX_ISR_MSB];
+ u8 israddr;
u8 isr[num];
int ret;
int i;
@@ -771,6 +855,11 @@ static irqreturn_t stmpe_irq(int irq, void *data)
return IRQ_HANDLED;
}

+ if (variant->id_val == STMPE1801_ID)
+ israddr = stmpe->regs[STMPE_IDX_ISR_LSB];
+ else
+ israddr = stmpe->regs[STMPE_IDX_ISR_MSB];
+
ret = stmpe_block_read(stmpe, israddr, num, isr);
if (ret < 0)
return IRQ_NONE;
@@ -938,6 +1027,12 @@ static int stmpe_chip_init(struct stmpe *stmpe)
if (ret)
return ret;

+ if (id == STMPE1801_ID) {
+ ret = stmpe1801_reset(stmpe);
+ if (ret < 0)
+ return ret;
+ }
+
if (stmpe->irq >= 0) {
if (id == STMPE801_ID)
icr = STMPE801_REG_SYS_CTRL_INT_EN;
diff --git a/drivers/mfd/stmpe.h b/drivers/mfd/stmpe.h
index 7b8e13f..ff2b09b 100644
--- a/drivers/mfd/stmpe.h
+++ b/drivers/mfd/stmpe.h
@@ -199,6 +199,55 @@ int stmpe_remove(struct stmpe *stmpe);
#define STPME1601_AUTOSLEEP_ENABLE (1 << 3)

/*
+ * STMPE1801
+ */
+#define STMPE1801_ID 0xc110
+#define STMPE1801_NR_INTERNAL_IRQS 5
+#define STMPE1801_IRQ_KEYPAD_COMBI 4
+#define STMPE1801_IRQ_GPIOC 3
+#define STMPE1801_IRQ_KEYPAD_OVER 2
+#define STMPE1801_IRQ_KEYPAD 1
+#define STMPE1801_IRQ_WAKEUP 0
+
+#define STMPE1801_REG_CHIP_ID 0x00
+#define STMPE1801_REG_SYS_CTRL 0x02
+#define STMPE1801_REG_INT_CTRL_LOW 0x04
+#define STMPE1801_REG_INT_EN_MASK_LOW 0x06
+#define STMPE1801_REG_INT_STA_LOW 0x08
+#define STMPE1801_REG_INT_EN_GPIO_MASK_LOW 0x0A
+#define STMPE1801_REG_INT_EN_GPIO_MASK_MID 0x0B
+#define STMPE1801_REG_INT_EN_GPIO_MASK_HIGH 0x0C
+#define STMPE1801_REG_INT_STA_GPIO_LOW 0x0D
+#define STMPE1801_REG_INT_STA_GPIO_MID 0x0E
+#define STMPE1801_REG_INT_STA_GPIO_HIGH 0x0F
+#define STMPE1801_REG_GPIO_SET_LOW 0x10
+#define STMPE1801_REG_GPIO_SET_MID 0x11
+#define STMPE1801_REG_GPIO_SET_HIGH 0x12
+#define STMPE1801_REG_GPIO_CLR_LOW 0x13
+#define STMPE1801_REG_GPIO_CLR_MID 0x14
+#define STMPE1801_REG_GPIO_CLR_HIGH 0x15
+#define STMPE1801_REG_GPIO_MP_LOW 0x16
+#define STMPE1801_REG_GPIO_MP_MID 0x17
+#define STMPE1801_REG_GPIO_MP_HIGH 0x18
+#define STMPE1801_REG_GPIO_SET_DIR_LOW 0x19
+#define STMPE1801_REG_GPIO_SET_DIR_MID 0x1A
+#define STMPE1801_REG_GPIO_SET_DIR_HIGH 0x1B
+#define STMPE1801_REG_GPIO_RE_LOW 0x1C
+#define STMPE1801_REG_GPIO_RE_MID 0x1D
+#define STMPE1801_REG_GPIO_RE_HIGH 0x1E
+#define STMPE1801_REG_GPIO_FE_LOW 0x1F
+#define STMPE1801_REG_GPIO_FE_MID 0x20
+#define STMPE1801_REG_GPIO_FE_HIGH 0x21
+#define STMPE1801_REG_GPIO_PULL_UP_LOW 0x22
+#define STMPE1801_REG_GPIO_PULL_UP_MID 0x23
+#define STMPE1801_REG_GPIO_PULL_UP_HIGH 0x24
+
+#define STMPE1801_MSK_SYS_CTRL_RESET (1 << 7)
+
+#define STMPE1801_MSK_INT_EN_KPC (1 << 1)
+#define STMPE1801_MSK_INT_EN_GPIO (1 << 3)
+
+/*
* STMPE24xx
*/

diff --git a/include/linux/mfd/stmpe.h b/include/linux/mfd/stmpe.h
index 383ac15..48395a6 100644
--- a/include/linux/mfd/stmpe.h
+++ b/include/linux/mfd/stmpe.h
@@ -26,6 +26,7 @@ enum stmpe_partnum {
STMPE801,
STMPE811,
STMPE1601,
+ STMPE1801,
STMPE2401,
STMPE2403,
STMPE_NBR_PARTS
@@ -39,6 +40,7 @@ enum {
STMPE_IDX_CHIP_ID,
STMPE_IDX_ICR_LSB,
STMPE_IDX_IER_LSB,
+ STMPE_IDX_ISR_LSB,
STMPE_IDX_ISR_MSB,
STMPE_IDX_GPMR_LSB,
STMPE_IDX_GPSR_LSB,
@@ -49,6 +51,7 @@ enum {
STMPE_IDX_GPFER_LSB,
STMPE_IDX_GPAFR_U_MSB,
STMPE_IDX_IEGPIOR_LSB,
+ STMPE_IDX_ISGPIOR_LSB,
STMPE_IDX_ISGPIOR_MSB,
STMPE_IDX_MAX,
};
--
1.7.10


\
 
 \ /
  Last update: 2013-02-18 18:21    [W:0.180 / U:0.248 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site