| Message ID | 1461068317-28016-3-git-send-email-patrice.chotard@st.com |
|---|---|
| State | New |
| Headers | show |
On Tue, Apr 19, 2016 at 2:18 PM, <patrice.chotard@st.com> wrote: > From: Patrice Chotard <patrice.chotard@st.com> > > 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> Yours, Linus Walleij -- To unsubscribe from this list: send the line "unsubscribe linux-gpio" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On Tue, 19 Apr 2016, patrice.chotard@st.com wrote: > From: Patrice Chotard <patrice.chotard@st.com> > > 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> > --- > drivers/mfd/stmpe.c | 23 +++++++++++++++-------- > drivers/mfd/stmpe.h | 7 +++++-- > 2 files changed, 20 insertions(+), 10 deletions(-) When you fix and resubmit, please add my: Acked-by: Lee Jones <lee.jones@linaro.org> ... for my own personal reference. > diff --git a/drivers/mfd/stmpe.c b/drivers/mfd/stmpe.c > index c553b73..af682d0 100644 > --- a/drivers/mfd/stmpe.c > +++ b/drivers/mfd/stmpe.c > @@ -735,13 +735,22 @@ 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; > > @@ -750,7 +759,7 @@ 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); > } > @@ -1074,11 +1083,9 @@ 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) > diff --git a/drivers/mfd/stmpe.h b/drivers/mfd/stmpe.h > index 406f9f2..4ae343d 100644 > --- a/drivers/mfd/stmpe.h > +++ b/drivers/mfd/stmpe.h > @@ -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) >
diff --git a/drivers/mfd/stmpe.c b/drivers/mfd/stmpe.c index c553b73..af682d0 100644 --- a/drivers/mfd/stmpe.c +++ b/drivers/mfd/stmpe.c @@ -735,13 +735,22 @@ 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; @@ -750,7 +759,7 @@ 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); } @@ -1074,11 +1083,9 @@ 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) diff --git a/drivers/mfd/stmpe.h b/drivers/mfd/stmpe.h index 406f9f2..4ae343d 100644 --- a/drivers/mfd/stmpe.h +++ b/drivers/mfd/stmpe.h @@ -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)