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mfd: stmpe: Add reset support for all STMPE variant 

Reset was only implemented for STMPE1801 variant despite
all variant have a SOFT_RESET bit.

For STMPE2401/2403/801/1601/1801 SOFT_RESET bit is bit 7
of SYS_CTRL register.
For STMPE610/811 (which have the same variant id) SOFT_RESET
bit is bit 1 of SYS_CTRL register.

Signed-off-by: Patrice Chotard <patrice.chotard@st.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
This commit is contained in:
Patrice Chotard 2016-08-10 09:39:07 +02:00 committed by Lee Jones
parent 0f4be8cf63
commit c4dd1ba355
2 changed files with 20 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

23
drivers/mfd/stmpe.c
View File

@ -756,13 +756,22 @@ static int stmpe1801_enable(struct stmpe *stmpe, unsigned int blocks,
enable ? mask : 0);
}
static int stmpe1801_reset(struct stmpe *stmpe)
static int stmpe_reset(struct stmpe *stmpe)
{
u16 id_val = stmpe->variant->id_val;
unsigned long timeout;
int ret = 0;
u8 reset_bit;
if (id_val == STMPE811_ID)
/* STMPE801 and STMPE610 use bit 1 of SYS_CTRL register */
reset_bit = STMPE811_SYS_CTRL_RESET;
else
/* all other STMPE variant use bit 7 of SYS_CTRL register */
reset_bit = STMPE_SYS_CTRL_RESET;
ret = __stmpe_set_bits(stmpe, stmpe->regs[STMPE_IDX_SYS_CTRL],
STMPE1801_MSK_SYS_CTRL_RESET, STMPE1801_MSK_SYS_CTRL_RESET);
reset_bit, reset_bit);
if (ret < 0)
return ret;
@ -771,7 +780,7 @@ static int stmpe1801_reset(struct stmpe *stmpe)
ret = __stmpe_reg_read(stmpe, stmpe->regs[STMPE_IDX_SYS_CTRL]);
if (ret < 0)
return ret;
if (!(ret & STMPE1801_MSK_SYS_CTRL_RESET))
if (!(ret & reset_bit))
return 0;
usleep_range(100, 200);
}
@ -1095,11 +1104,9 @@ 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;
}
ret = stmpe_reset(stmpe);
if (ret < 0)
return ret;
if (stmpe->irq >= 0) {
if (id == STMPE801_ID)

7
drivers/mfd/stmpe.h
View File

@ -104,6 +104,8 @@ int stmpe_remove(struct stmpe *stmpe);
#define STMPE_ICR_LSB_EDGE (1 << 1)
#define STMPE_ICR_LSB_GIM (1 << 0)
#define STMPE_SYS_CTRL_RESET (1 << 7)
/*
* STMPE801
*/
@ -126,6 +128,7 @@ int stmpe_remove(struct stmpe *stmpe);
/*
* STMPE811
*/
#define STMPE811_ID 0x0811
#define STMPE811_IRQ_TOUCH_DET 0
#define STMPE811_IRQ_FIFO_TH 1
@ -155,6 +158,8 @@ int stmpe_remove(struct stmpe *stmpe);
#define STMPE811_REG_GPIO_FE 0x16
#define STMPE811_REG_GPIO_AF 0x17
#define STMPE811_SYS_CTRL_RESET (1 << 1)
#define STMPE811_SYS_CTRL2_ADC_OFF (1 << 0)
#define STMPE811_SYS_CTRL2_TSC_OFF (1 << 1)
#define STMPE811_SYS_CTRL2_GPIO_OFF (1 << 2)
@ -244,8 +249,6 @@ int stmpe_remove(struct stmpe *stmpe);
#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)