On Wed, Oct 24, 2012 at 6:52 PM, Felipe Balbi <balbi@xxxxxx> wrote: > On Wed, Oct 24, 2012 at 09:14:29AM -0700, Dmitry Torokhov wrote: >> All of _their_ resources, exactly. They do not own nor control pins so >> they should not be bothered with them either. Look, when you see that > > except that they *own* the pins. Now that the muxer has been setup > properly, this particular IP owns the pins. This is true. It is then also reflected in the device model. And in debugfs, which is very helpful when debugging. If I cat /sys/kernel/debug/pinctrl/pinctrl-db8500/pins I can see a list of all pins on this ASIC and what device is using it. It is all due to the fact that each driver use [devm_]pinctrl_get(&dev) ad the struct device * pointer is used with dev_name() to print the corresponding device name. When using hogs it just says the name of the pin controller and the pins aren't really connected to their real consumers :-P Example: Pinmux settings per pin Format: pin (name): mux_owner gpio_owner hog? pin 0 (GPIO0_AJ5): (MUX UNCLAIMED) (GPIO UNCLAIMED) pin 1 (GPIO1_AJ3): (MUX UNCLAIMED) (GPIO UNCLAIMED) pin 2 (GPIO2_AH4): (MUX UNCLAIMED) (GPIO UNCLAIMED) pin 3 (GPIO3_AH3): (MUX UNCLAIMED) (GPIO UNCLAIMED) pin 4 (GPIO4_AH6): (MUX UNCLAIMED) (GPIO UNCLAIMED) pin 5 (GPIO5_AG6): (MUX UNCLAIMED) DB8500:5 pin 6 (GPIO6_AF6): pinctrl-db8500 (GPIO UNCLAIMED) function ipgpio group ipgpio0_c_1 pin 7 (GPIO7_AG5): pinctrl-db8500 (GPIO UNCLAIMED) function ipgpio group ipgpio1_c_1 pin 8 (GPIO8_AD5): (MUX UNCLAIMED) (GPIO UNCLAIMED) pin 9 (GPIO9_AE4): (MUX UNCLAIMED) (GPIO UNCLAIMED) pin 10 (GPIO10_AF5): nmk-i2c.2 (GPIO UNCLAIMED) function i2c2 group i2c2_b_2 pin 11 (GPIO11_AG4): nmk-i2c.2 (GPIO UNCLAIMED) function i2c2 group i2c2_b_2 pin 12 (GPIO12_AC4): pinctrl-db8500 (GPIO UNCLAIMED) function msp0 group msp0txrx_a_1 pin 13 (GPIO13_AF3): pinctrl-db8500 (GPIO UNCLAIMED) function msp0 group msp0tfstck_a_1 pin 14 (GPIO14_AE3): pinctrl-db8500 (GPIO UNCLAIMED) function msp0 group msp0tfstck_a_1 pin 15 (GPIO15_AC3): pinctrl-db8500 (GPIO UNCLAIMED) function msp0 group msp0txrx_a_1 pin 16 (GPIO16_AD3): nmk-i2c.1 (GPIO UNCLAIMED) function i2c1 group i2c1_b_2 pin 17 (GPIO17_AD4): nmk-i2c.1 (GPIO UNCLAIMED) function i2c1 group i2c1_b_2 As you can see pins 6,7,12-15 are using hogs. Sure I can see the name of the function but that is just a string albeit helpful. Pins 10,11,16,17 are requested directly from the i2c driver and shows up connected to its device. Yours, Linus Walleij -- To unsubscribe from this list: send the line "unsubscribe linux-input" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
