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From: Subhashini Rao Beerisetty <subhashbeerisetty@gmail.com>
To: kernelnewbies <kernelnewbies@kernelnewbies.org>,
	linux-gpio@vger.kernel.org
Subject: gpio: struct gpio_chip.set_multiple\get_multiple
Date: Thu, 10 Jan 2019 23:24:25 +0530	[thread overview]
Message-ID: <CAPY=qRTEQYEQYWBFzvZ9iTftuq7Atn1VqF=rJosybzzHpTjbTQ@mail.gmail.com> (raw)


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Hi All,


struct gpio_chip {

  int (*get_multiple)(struct gpio_chip *chip,unsigned long *mask,
unsigned long *bits);

  void (*set_multiple)(struct gpio_chip *chip,unsigned long *mask,
unsigned long *bits);

}

struct gpio_chip provides set_multiple callback to assign output values for
multiple signals defined by “mask” and similarly it has get_multiple
callback to read values for multiple signals defined by “mask” and stores
them in “bits”.


 I’m using deprecated sysfs interface (/sys/class/gpio/gpiochipN – v4.4
kernel), in this kernel version I could not find any userspace control to
achieve to output values for multiple PIO’s and similarly to read multiple
PIO’s. Can someone clarify me on this?


Thanks,

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                 reply	other threads:[~2019-01-10 17:55 UTC|newest]

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