Hi Fabio, On Wed, 22 Nov 2017 20:53:33 -0200 Fabio Estevam <festevam@xxxxxxxxx> wrote: > Hi Davide, > > On Wed, Nov 22, 2017 at 8:45 PM, Davide Hug <d@xxxxxxxxxx> wrote: > > > Thanks. As I understand it imx7d-sdb-sht11.dts uses gpio4 specified in > > arch/arm/boot/dts/imx7s.dtsi, which has compatible = "fsl,imx7d-gpio", > > "fsl,imx35-gpio". > > I don't find a driver compatible fsl,imx7d-gpio, so I guess it is the > > gpio/gpio-mxc.c driver compatible fsl,imx35-gpio. > > Correct. Great. Thanks! > > > This driver doesn't use GPIOLIB_IRQCHIP, so I would understand why hwmon/sht15 > > loads here. > > We build the kernel with imx_v6_v7_defconfig. GPIOLIB_IRQCHIP is selected there. So the GPIOLIB_IRQCHIP code in gpiolib.c is enabled. But the driver gpio-mxc doesn't use it. In particular it doesn't call gpiochip_add_irqchip which assigns the .irq_request_resources/.irq_release_resources callbacks that toggle the FLAG_USED_AS_IRQ. So in the gpio-mxc driver the guard against setting a GPIO with active IRQ as output is not in place. And it is this guard that makes the sht15 driver fail to load when in place. Thanks, Davide -- To unsubscribe from this list: send the line "unsubscribe linux-hwmon" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
