On 11/05/2023 13:19:58-0400, Hugo Villeneuve wrote: > On Mon, 23 Jan 2023 15:52:40 -0500 > Hugo Villeneuve <hugo@xxxxxxxxxxx> wrote: > > > On Fri, 20 Jan 2023 17:56:39 +0100 > > Alexandre Belloni <alexandre.belloni@xxxxxxxxxxx> wrote: > > > > > On 15/12/2022 10:02:09-0500, Hugo Villeneuve wrote: > > > > From: Hugo Villeneuve <hvilleneuve@xxxxxxxxxxxx> > > > > > > > > The PCF2127 and PCF2129 have one output interrupt pin. The PCF2131 has > > > > two, named INT_A and INT_B. The hardware support that any interrupt > > > > source can be routed to either one or both of them. > > > > > > > > Force all interrupt sources to go to the INT A pin. > > > > > > > > Support to route any interrupt source to INT A/B pins is not supported > > > > by this driver at the moment. > > > > > > > > > > The main issue with this is that this will created a breaking change > > > once someone needs support for INTB > > > > We already had a discussion about this a while ago: > > > > https://lore.kernel.org/linux-rtc/7be3f9541eaed7e17e334267e49665f442b1b458.camel@xxxxxxxxxxxx/ > > > > What exactly do you suggest? I personnaly don't have any need for INTB at the moment and I would prefer to avoid the great complexity of supporting any combination of routing interrupts to any A ou pins. > > Hi Alexandre, > a few months later, and I am still waiting for your feedback on this (and other questions/interrogations I raised for other patches related to this series) to submit the next version of this patch series. > > Can you have a look at it and provide some answers? > I'm very very sorry this takes so long. For this one, I don't have a precise idea. I guess we could have one property per pin with a mask of the interrupts we are interested in. That would cover all the use cases. For example, a PMIC could take the alarms on INTB and the CPU could have alarms, battery low and UIE on INTA. > Thank you, > Hugo. > > > > > > Signed-off-by: Hugo Villeneuve <hvilleneuve@xxxxxxxxxxxx> > > > > --- > > > > drivers/rtc/rtc-pcf2127.c | 35 +++++++++++++++++++++++++++++++++++ > > > > 1 file changed, 35 insertions(+) > > > > > > > > diff --git a/drivers/rtc/rtc-pcf2127.c b/drivers/rtc/rtc-pcf2127.c > > > > index 4148e135f935..68af4d0438b8 100644 > > > > --- a/drivers/rtc/rtc-pcf2127.c > > > > +++ b/drivers/rtc/rtc-pcf2127.c > > > > @@ -191,6 +191,7 @@ struct pcf21xx_config { > > > > int max_register; > > > > unsigned int has_nvmem:1; > > > > unsigned int has_bit_wd_ctl_cd0:1; > > > > + unsigned int has_int_a_b:1; /* PCF2131 supports two interrupt outputs. */ > > > > u8 regs_td_base; /* Time/data base registers. */ > > > > u8 regs_alarm_base; /* Alarm function base registers. */ > > > > u8 reg_wd_ctl; /* Watchdog control register. */ > > > > @@ -879,6 +880,7 @@ static struct pcf21xx_config pcf21xx_cfg[] = { > > > > .max_register = 0x1d, > > > > .has_nvmem = 1, > > > > .has_bit_wd_ctl_cd0 = 1, > > > > + .has_int_a_b = 0, > > > > .regs_td_base = PCF2127_REG_TIME_DATE_BASE, > > > > .regs_alarm_base = PCF2127_REG_ALARM_BASE, > > > > .reg_wd_ctl = PCF2127_REG_WD_CTL, > > > > @@ -902,6 +904,7 @@ static struct pcf21xx_config pcf21xx_cfg[] = { > > > > .max_register = 0x19, > > > > .has_nvmem = 0, > > > > .has_bit_wd_ctl_cd0 = 0, > > > > + .has_int_a_b = 0, > > > > .regs_td_base = PCF2127_REG_TIME_DATE_BASE, > > > > .regs_alarm_base = PCF2127_REG_ALARM_BASE, > > > > .reg_wd_ctl = PCF2127_REG_WD_CTL, > > > > @@ -925,6 +928,7 @@ static struct pcf21xx_config pcf21xx_cfg[] = { > > > > .max_register = 0x36, > > > > .has_nvmem = 0, > > > > .has_bit_wd_ctl_cd0 = 0, > > > > + .has_int_a_b = 1, > > > > .regs_td_base = PCF2131_REG_TIME_DATE_BASE, > > > > .regs_alarm_base = PCF2131_REG_ALARM_BASE, > > > > .reg_wd_ctl = PCF2131_REG_WD_CTL, > > > > @@ -1017,6 +1021,28 @@ static int pcf2127_enable_ts(struct device *dev, int ts_id) > > > > return ret; > > > > } > > > > > > > > +/* Route all interrupt sources to INT A pin. */ > > > > +static int pcf2127_configure_interrupt_pins(struct device *dev) > > > > +{ > > > > + struct pcf2127 *pcf2127 = dev_get_drvdata(dev); > > > > + int ret; > > > > + > > > > + /* Mask bits need to be cleared to enable corresponding > > > > + * interrupt source. > > > > + */ > > > > + ret = regmap_write(pcf2127->regmap, > > > > + PCF2131_REG_INT_A_MASK1, 0); > > > > + if (ret) > > > > + return ret; > > > > + > > > > + ret = regmap_write(pcf2127->regmap, > > > > + PCF2131_REG_INT_A_MASK2, 0); > > > > + if (ret) > > > > + return ret; > > > > + > > > > + return ret; > > > > +} > > > > + > > > > static int pcf2127_probe(struct device *dev, struct regmap *regmap, > > > > int alarm_irq, const char *name, const struct pcf21xx_config *config) > > > > { > > > > @@ -1076,6 +1102,15 @@ static int pcf2127_probe(struct device *dev, struct regmap *regmap, > > > > set_bit(RTC_FEATURE_ALARM, pcf2127->rtc->features); > > > > } > > > > > > > > + if (pcf2127->cfg->has_int_a_b) { > > > > + /* Configure int A/B pins, independently of alarm_irq. */ > > > > + ret = pcf2127_configure_interrupt_pins(dev); > > > > + if (ret) { > > > > + dev_err(dev, "failed to configure interrupt pins\n"); > > > > + return ret; > > > > + } > > > > + } > > > > + > > > > if (pcf2127->cfg->has_nvmem) { > > > > struct nvmem_config nvmem_cfg = { > > > > .priv = pcf2127, > > > > -- > > > > 2.30.2 > > > > > > > > > > -- > > > Alexandre Belloni, co-owner and COO, Bootlin > > > Embedded Linux and Kernel engineering > > > https://bootlin.com > > > > > > > > > -- > > Hugo Villeneuve <hugo@xxxxxxxxxxx> > > > -- > Hugo Villeneuve -- Alexandre Belloni, co-owner and COO, Bootlin Embedded Linux and Kernel engineering https://bootlin.com
