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* replacement for /sys/kernel/debug/omap_mux in DT/pinctrl land ?
@ 2012-09-26 11:46 Koen Kooi
  2012-09-26 12:56 ` Matt Porter
  0 siblings, 1 reply; 8+ messages in thread
From: Koen Kooi @ 2012-09-26 11:46 UTC (permalink / raw)
  To: List List

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.

regards,

Koen

^ permalink raw reply	[flat|nested] 8+ messages in thread

end of thread, other threads:[~2012-09-26 19:04 UTC | newest]

Thread overview: 8+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2012-09-26 11:46 replacement for /sys/kernel/debug/omap_mux in DT/pinctrl land ? Koen Kooi
2012-09-26 12:56 ` Matt Porter
2012-09-26 13:03   ` Linus Walleij
2012-09-26 16:15     ` Matt Porter
2012-09-26 17:21       ` Koen Kooi
2012-09-26 18:52         ` Tony Lindgren
2012-09-26 18:53           ` Koen Kooi
2012-09-26 19:04             ` Tony Lindgren

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