/*
 * Helpers for controlling modem lines via GPIO
 *
 * Copyright (C) 2014 Paratronic S.A.
 *
 * 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.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 */

#ifndef __SERIAL_MCTRL_GPIO__
#define __SERIAL_MCTRL_GPIO__

#include <linux/err.h>
#include <linux/device.h>
#include <linux/gpio/consumer.h>

struct uart_port;

enum mctrl_gpio_idx {
	UART_GPIO_CTS,
	UART_GPIO_DSR,
	UART_GPIO_DCD,
	UART_GPIO_RNG,
	UART_GPIO_RI = UART_GPIO_RNG,
	UART_GPIO_RTS,
	UART_GPIO_DTR,
	UART_GPIO_MAX,
};

/*
 * Opaque descriptor for modem lines controlled by GPIOs
 */
struct mctrl_gpios;

#ifdef CONFIG_GPIOLIB

/*
 * Set state of the modem control output lines via GPIOs.
 */
void mctrl_gpio_set(struct mctrl_gpios *gpios, unsigned int mctrl);

/*
 * Get state of the modem control input lines from GPIOs.
 * The mctrl flags are updated and returned.
 */
unsigned int mctrl_gpio_get(struct mctrl_gpios *gpios, unsigned int *mctrl);

/*
 * Get state of the modem control output lines from GPIOs.
 * The mctrl flags are updated and returned.
 */
unsigned int
mctrl_gpio_get_outputs(struct mctrl_gpios *gpios, unsigned int *mctrl);

/*
 * Returns the associated struct gpio_desc to the modem line gidx
 */
struct gpio_desc *mctrl_gpio_to_gpiod(struct mctrl_gpios *gpios,
				      enum mctrl_gpio_idx gidx);

/*
 * Request and set direction of modem control line GPIOs and set up irq
 * handling.
 * devm_* functions are used, so there's no need to call mctrl_gpio_free().
 * Returns a pointer to the allocated mctrl structure if ok, -ENOMEM on
 * allocation error.
 */
struct mctrl_gpios *mctrl_gpio_init(struct uart_port *port, unsigned int idx);

/*
 * Request and set direction of modem control line GPIOs.
 * devm_* functions are used, so there's no need to call mctrl_gpio_free().
 * Returns a pointer to the allocated mctrl structure if ok, -ENOMEM on
 * allocation error.
 */
struct mctrl_gpios *mctrl_gpio_init_noauto(struct device *dev,
					   unsigned int idx);

/*
 * Free the mctrl_gpios structure.
 * Normally, this function will not be called, as the GPIOs will
 * be disposed of by the resource management code.
 */
void mctrl_gpio_free(struct device *dev, struct mctrl_gpios *gpios);

/*
 * Enable gpio interrupts to report status line changes.
 */
void mctrl_gpio_enable_ms(struct mctrl_gpios *gpios);

/*
 * Disable gpio interrupts to report status line changes.
 */
void mctrl_gpio_disable_ms(struct mctrl_gpios *gpios);

#else /* GPIOLIB */

static inline
void mctrl_gpio_set(struct mctrl_gpios *gpios, unsigned int mctrl)
{
}

static inline
unsigned int mctrl_gpio_get(struct mctrl_gpios *gpios, unsigned int *mctrl)
{
	return *mctrl;
}

static inline unsigned int
mctrl_gpio_get_outputs(struct mctrl_gpios *gpios, unsigned int *mctrl)
{
	return *mctrl;
}

static inline
struct gpio_desc *mctrl_gpio_to_gpiod(struct mctrl_gpios *gpios,
				      enum mctrl_gpio_idx gidx)
{
	return ERR_PTR(-ENOSYS);
}

static inline
struct mctrl_gpios *mctrl_gpio_init(struct uart_port *port, unsigned int idx)
{
	return ERR_PTR(-ENOSYS);
}

static inline
struct mctrl_gpios *mctrl_gpio_init_noauto(struct device *dev, unsigned int idx)
{
	return ERR_PTR(-ENOSYS);
}

static inline
void mctrl_gpio_free(struct device *dev, struct mctrl_gpios *gpios)
{
}

static inline void mctrl_gpio_enable_ms(struct mctrl_gpios *gpios)
{
}

static inline void mctrl_gpio_disable_ms(struct mctrl_gpios *gpios)
{
}

#endif /* GPIOLIB */

#endif
/option></select></td></tr><tr><td class='label'>space:</td><td class='ctrl'><select name='ignorews' onchange='this.form.submit();'><option value='0' selected='selected'>include</option><option value='1'>ignore</option></select></td></tr><tr><td class='label'>mode:</td><td class='ctrl'><select name='dt' onchange='this.form.submit();'><option value='0' selected='selected'>unified</option><option value='1'>ssdiff</option><option value='2'>stat only</option></select></td></tr><tr><td/><td class='ctrl'><noscript><input type='submit' value='reload'/></noscript></td></tr></table></form></div><table summary='commit info' class='commit-info'>
<tr><th>author</th><td>Vincent &lt;vincent.stehle@laposte.net&gt;</td><td class='right'>2017-01-30 15:06:43 +0100</td></tr>
<tr><th>committer</th><td>David S. Miller &lt;davem@davemloft.net&gt;</td><td class='right'>2017-01-31 13:07:40 -0500</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/net/wireless/Kconfig?id=c73e44269369e936165f0f9b61f1f09a11dae01c'>c73e44269369e936165f0f9b61f1f09a11dae01c</a> (<a href='/cgit.cgi/linux/net-next.git/patch/net/wireless/Kconfig?id=c73e44269369e936165f0f9b61f1f09a11dae01c'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=c73e44269369e936165f0f9b61f1f09a11dae01c'>e2188e900ba06302f8ed2746cb07edd3efbc5c35</a> /<a href='/cgit.cgi/linux/net-next.git/tree/net/wireless/Kconfig?id=c73e44269369e936165f0f9b61f1f09a11dae01c'>net/wireless/Kconfig</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/net/wireless/Kconfig?id=040587af31228d82c52267f717c9fcdb65f36335'>040587af31228d82c52267f717c9fcdb65f36335</a> (<a href='/cgit.cgi/linux/net-next.git/diff/net/wireless/Kconfig?id=c73e44269369e936165f0f9b61f1f09a11dae01c&amp;id2=040587af31228d82c52267f717c9fcdb65f36335'>diff</a>)</td></tr></table>
<div class='commit-subject'>net: thunderx: avoid dereferencing xcv when NULL</div><div class='commit-msg'>This fixes the following smatch and coccinelle warnings:

  drivers/net/ethernet/cavium/thunder/thunder_xcv.c:119 xcv_setup_link() error: we previously assumed 'xcv' could be null (see line 118) [smatch]
  drivers/net/ethernet/cavium/thunder/thunder_xcv.c:119:16-20: ERROR: xcv is NULL but dereferenced. [coccinelle]

Fixes: 6465859aba1e66a5 ("net: thunderx: Add RGMII interface type support")
Signed-off-by: Vincent Stehlé &lt;vincent.stehle@laposte.net&gt;
Cc: Sunil Goutham &lt;sgoutham@cavium.com&gt;
Signed-off-by: David S. Miller &lt;davem@davemloft.net&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=c73e44269369e936165f0f9b61f1f09a11dae01c'>Diffstat</a> (limited to 'net/wireless/Kconfig')</div><table summary='diffstat' class='diffstat'>