https://github.com/torvalds/linux
- HEAD
- refs/heads/arm64-uaccess
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/certifi-2024.7.4
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/idna-3.7
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/requests-2.32.2
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/setuptools-70.0.0
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/urllib3-2.2.2
- refs/heads/master
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Tip revision: 18558cae0272f8fd9647e69d3fec1565a7949865 authored by Linus Torvalds on 14 February 2016, 21:05:20 UTC
Linux 4.5-rc4
Linux 4.5-rc4
Tip revision: 18558ca
vme_pio2_cntr.c
/*
* GE PIO2 Counter Driver
*
* Author: Martyn Welch <martyn.welch@ge.com>
* Copyright 2009 GE Intelligent Platforms Embedded Systems, Inc.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
* The PIO-2 has 6 counters, currently this code just disables the interrupts
* and leaves them alone.
*
*/
#include <linux/device.h>
#include <linux/types.h>
#include <linux/gpio.h>
#include <linux/vme.h>
#include "vme_pio2.h"
static int pio2_cntr_irq_set(struct pio2_card *card, int id)
{
int retval;
u8 data;
data = PIO2_CNTR_SC_DEV[id] | PIO2_CNTR_RW_BOTH | card->cntr[id].mode;
retval = vme_master_write(card->window, &data, 1, PIO2_CNTR_CTRL[id]);
if (retval < 0)
return retval;
data = card->cntr[id].count & 0xFF;
retval = vme_master_write(card->window, &data, 1, PIO2_CNTR_DATA[id]);
if (retval < 0)
return retval;
data = (card->cntr[id].count >> 8) & 0xFF;
retval = vme_master_write(card->window, &data, 1, PIO2_CNTR_DATA[id]);
if (retval < 0)
return retval;
return 0;
}
int pio2_cntr_reset(struct pio2_card *card)
{
int i, retval = 0;
u8 reg;
/* Clear down all timers */
for (i = 0; i < 6; i++) {
card->cntr[i].mode = PIO2_CNTR_MODE5;
card->cntr[i].count = 0;
retval = pio2_cntr_irq_set(card, i);
if (retval < 0)
return retval;
}
/* Ensure all counter interrupts are cleared */
do {
retval = vme_master_read(card->window, ®, 1,
PIO2_REGS_INT_STAT_CNTR);
if (retval < 0)
return retval;
} while (reg != 0);
return retval;
}