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Date: Tue, 12 Feb 2013 11:05:12 +0100
From: Samuel Ortiz <samuel.ortiz@...el.com>
To: Jean-Nicolas Graux <jean-nicolas.graux@...ricsson.com>,
Dmitry Torokhov <dmitry.torokhov@...il.com>
Cc: linux-kernel@...r.kernel.org, Lee Jones <lee.jones@...aro.org>
Subject: Re: [PATCH] mfd: support stmpe1801 18 bits enhanced port expander
Adding Dmitry to the thread, for the input parts.
On Thu, Dec 20, 2012 at 09:57:19AM +0100, Jean-Nicolas Graux wrote:
> 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.
>
> Signed-off-by: Jean-Nicolas Graux <jean-nicolas.graux@...ricsson.com>
> ---
> drivers/gpio/gpio-stmpe.c | 52 +++++--
> drivers/input/keyboard/stmpe-keypad.c | 251 +++++++++++++++++++++++++++------
> 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, 392 insertions(+), 62 deletions(-)
>
> diff --git a/drivers/gpio/gpio-stmpe.c b/drivers/gpio/gpio-stmpe.c
> index dce3472..662c415 100644
> --- a/drivers/gpio/gpio-stmpe.c
> +++ b/drivers/gpio/gpio-stmpe.c
> @@ -42,14 +42,25 @@ 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;
> @@ -62,8 +73,10 @@ 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.
> @@ -80,8 +93,10 @@ 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);
>
> @@ -93,8 +108,10 @@ 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);
> }
> @@ -174,6 +191,7 @@ 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 */
> @@ -189,7 +207,8 @@ 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);
> }
> }
>
> @@ -229,18 +248,20 @@ 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];
>
> @@ -258,10 +279,11 @@ 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 8923352..2b081b7 100644
> --- a/drivers/input/keyboard/stmpe-keypad.c
> +++ b/drivers/input/keyboard/stmpe-keypad.c
> @@ -14,41 +14,114 @@
> #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_MAX_COLS 10
> +
> #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
> * @auto_increment: whether the KPC_DATA_BYTE register address
> @@ -57,6 +130,10 @@
> * @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 +143,13 @@ 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 +159,27 @@ 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 +187,13 @@ 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 +201,13 @@ 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,
> },
> };
>
> @@ -108,6 +219,7 @@ struct stmpe_keypad {
>
> unsigned int rows;
> unsigned int cols;
> + unsigned char scan_code_row_shift;
> bool enable;
>
> unsigned short keymap[STMPE_KEYPAD_KEYMAP_SIZE];
> @@ -162,11 +274,13 @@ 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;
>
> @@ -191,9 +305,10 @@ 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)
> @@ -270,33 +385,69 @@ static int __devinit 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 int __devinit stmpe_keypad_probe(struct platform_device *pdev)
> @@ -341,8 +492,21 @@ static int __devinit stmpe_keypad_probe(struct platform_device *pdev)
> input->keycodesize = sizeof(keypad->keymap[0]);
> input->keycodemax = ARRAY_SIZE(keypad->keymap);
>
> - matrix_keypad_build_keymap(plat->keymap_data, STMPE_KEYPAD_ROW_SHIFT,
> - input->keycode, input->keybit);
> + keypad->stmpe = stmpe;
> + keypad->plat = plat;
> + keypad->input = input;
> + keypad->variant = &stmpe_keypad_variants[stmpe->partnum];
> +
> + /*
> + * 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);
> +
> + matrix_keypad_build_keymap(plat->keymap_data,
> + keypad->scan_code_row_shift,
> + input->keycode, input->keybit);
>
> for (i = 0; i < plat->keymap_data->keymap_size; i++) {
> unsigned int key = plat->keymap_data->keymap[i];
> @@ -351,11 +515,6 @@ static int __devinit stmpe_keypad_probe(struct platform_device *pdev)
> keypad->rows |= 1 << KEY_ROW(key);
> }
>
> - keypad->stmpe = stmpe;
> - keypad->plat = plat;
> - keypad->input = input;
> - keypad->variant = &stmpe_keypad_variants[stmpe->partnum];
> -
> ret = stmpe_keypad_chip_init(keypad);
> if (ret < 0)
> goto out_freeinput;
> diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
> index acf35bf..e3713c8 100644
> --- a/drivers/mfd/Kconfig
> +++ b/drivers/mfd/Kconfig
> @@ -293,6 +293,7 @@ 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 373f423..a2135f8 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 6b8f941..902038d 100644
> --- a/drivers/mfd/stmpe.c
> +++ b/drivers/mfd/stmpe.c
> @@ -15,6 +15,7 @@
> #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;
> @@ -769,6 +853,11 @@ 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;
> @@ -936,6 +1025,12 @@ static int __devinit 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 f8d5b4d..5b87ec4 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
>
--
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