Adding Linus W. and lkml. On Wed, Sep 26, 2012 at 01:46:45PM +0200, Koen Kooi wrote: > Hi, > > With a patched 3.6rc7 on my beaglebone I can set the pinmux for pins using > pinctrl and that seems to work. On the 3.2 vendor tree there was the omap_mux > driver with an awesome debugfs interface: > > # cat /sys/kernel/debug/omap_mux/lcd_data0 > name: lcd_data0.ehrpwm2A (0x44e108a0/0x8a0 = 0x0003), b NA, t NA > mode: OMAP_PIN_OUTPUT | OMAP_MUX_MODE3 > signals: lcd_data0 | gpmc_a0 | pr1_mii_mt0_clk | ehrpwm2A | NA | > pr1_pru1_pru_r30_0 | pr1_pru1_pru_r31_0 | gpio2_6 > > Notice how it tells me that it's muxed the PWM in 2 ways: signal name > (ehrpwm2A) and register content (0x0003). Compare to pinctrl: > > root@bone-mainline:/sys/kernel/debug/pinctrl/44e10800.pinmux# grep 8a0 * > pinconf-pins:pin 40 (44e108a0): > pingroups:pin 40 (44e108a0) > pinmux-pins:pin 40 (44e108a0): 4a300000.pruss (GPIO UNCLAIMED) function > pinmux_pruss_led_pins group pinmux_pruss_led_pins > pins:pin 40 (44e108a0) pinctrl-single > > What is that pin muxed to? It is part of the 'pinmux_pruss_led_pins' in the > DT, but debugfs remains mute on how pin 40 is muxed.
It does seem like a pretty big gap in the pinctrl/pinmux debugfs interface when viewed from an OMAP perspective. Ideally there would be a pinctrl/pinmux hook to the pinmux driver to provide the detailed h/w specific pin state info. -Matt -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
