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Message-Id: <a5a468ae0ce738c56a3e4313cc266fe143b4071d.1626948810.git-series.a.fatoum@pengutronix.de>
Date: Thu, 22 Jul 2021 12:14:44 +0200
From: Ahmad Fatoum <a.fatoum@...gutronix.de>
To: Wim Van Sebroeck <wim@...ux-watchdog.org>,
Guenter Roeck <linux@...ck-us.net>,
linux-watchdog@...r.kernel.org
Cc: kernel@...gutronix.de, linux-kernel@...r.kernel.org,
Ahmad Fatoum <a.fatoum@...gutronix.de>
Subject: [PATCH v4 5/5] watchdog: f71808e_wdt: dynamically allocate watchdog driver data
While the driver will only match against a single device, convention is
to dynamically allocate the driver data.
Suggested-by: Guenter Roeck <linux@...ck-us.net>
Signed-off-by: Ahmad Fatoum <a.fatoum@...gutronix.de>
---
drivers/watchdog/f71808e_wdt.c | 198 +++++++++++++++++++---------------
1 file changed, 111 insertions(+), 87 deletions(-)
diff --git a/drivers/watchdog/f71808e_wdt.c b/drivers/watchdog/f71808e_wdt.c
index d4cae73da002..f495bf6fb0ab 100644
--- a/drivers/watchdog/f71808e_wdt.c
+++ b/drivers/watchdog/f71808e_wdt.c
@@ -143,7 +143,9 @@ struct fintek_wdt {
char pulse_mode; /* enable pulse output mode? */
};
-static struct fintek_wdt watchdog;
+struct fintek_wdt_pdata {
+ enum chips type;
+};
/* Super I/O functions */
static inline int superio_inb(int base, int reg)
@@ -209,13 +211,15 @@ static inline void superio_exit(int base)
static int fintek_wdt_set_timeout(struct watchdog_device *wdd, unsigned int timeout)
{
+ struct fintek_wdt *wd = watchdog_get_drvdata(wdd);
+
if (timeout > 0xff) {
- watchdog.timer_val = DIV_ROUND_UP(timeout, 60);
- watchdog.minutes_mode = true;
- timeout = watchdog.timer_val * 60;
+ wd->timer_val = DIV_ROUND_UP(timeout, 60);
+ wd->minutes_mode = true;
+ timeout = wd->timer_val * 60;
} else {
- watchdog.timer_val = timeout;
- watchdog.minutes_mode = false;
+ wd->timer_val = timeout;
+ wd->minutes_mode = false;
}
wdd->timeout = timeout;
@@ -223,63 +227,65 @@ static int fintek_wdt_set_timeout(struct watchdog_device *wdd, unsigned int time
return 0;
}
-static int fintek_wdt_set_pulse_width(unsigned int pw)
+static int fintek_wdt_set_pulse_width(struct fintek_wdt *wd, unsigned int pw)
{
unsigned int t1 = 25, t2 = 125, t3 = 5000;
- if (watchdog.type == f71868) {
+ if (wd->type == f71868) {
t1 = 30;
t2 = 150;
t3 = 6000;
}
if (pw <= 1) {
- watchdog.pulse_val = 0;
+ wd->pulse_val = 0;
} else if (pw <= t1) {
- watchdog.pulse_val = 1;
+ wd->pulse_val = 1;
} else if (pw <= t2) {
- watchdog.pulse_val = 2;
+ wd->pulse_val = 2;
} else if (pw <= t3) {
- watchdog.pulse_val = 3;
+ wd->pulse_val = 3;
} else {
pr_err("pulse width out of range\n");
return -EINVAL;
}
- watchdog.pulse_mode = pw;
+ wd->pulse_mode = pw;
return 0;
}
static int fintek_wdt_keepalive(struct watchdog_device *wdd)
{
+ struct fintek_wdt *wd = watchdog_get_drvdata(wdd);
int err;
- err = superio_enter(watchdog.sioaddr);
+ err = superio_enter(wd->sioaddr);
if (err)
return err;
- superio_select(watchdog.sioaddr, SIO_F71808FG_LD_WDT);
+ superio_select(wd->sioaddr, SIO_F71808FG_LD_WDT);
- if (watchdog.minutes_mode)
+ if (wd->minutes_mode)
/* select minutes for timer units */
- superio_set_bit(watchdog.sioaddr, F71808FG_REG_WDT_CONF,
+ superio_set_bit(wd->sioaddr, F71808FG_REG_WDT_CONF,
F71808FG_FLAG_WD_UNIT);
else
/* select seconds for timer units */
- superio_clear_bit(watchdog.sioaddr, F71808FG_REG_WDT_CONF,
+ superio_clear_bit(wd->sioaddr, F71808FG_REG_WDT_CONF,
F71808FG_FLAG_WD_UNIT);
/* Set timer value */
- superio_outb(watchdog.sioaddr, F71808FG_REG_WD_TIME,
- watchdog.timer_val);
+ superio_outb(wd->sioaddr, F71808FG_REG_WD_TIME,
+ wd->timer_val);
- superio_exit(watchdog.sioaddr);
+ superio_exit(wd->sioaddr);
return 0;
}
static int fintek_wdt_start(struct watchdog_device *wdd)
{
+ struct fintek_wdt *wd = watchdog_get_drvdata(wdd);
int err;
u8 tmp;
@@ -288,57 +294,57 @@ static int fintek_wdt_start(struct watchdog_device *wdd)
if (err)
return err;
- err = superio_enter(watchdog.sioaddr);
+ err = superio_enter(wd->sioaddr);
if (err)
return err;
- superio_select(watchdog.sioaddr, SIO_F71808FG_LD_WDT);
+ superio_select(wd->sioaddr, SIO_F71808FG_LD_WDT);
/* Watchdog pin configuration */
- switch (watchdog.type) {
+ switch (wd->type) {
case f71808fg:
/* Set pin 21 to GPIO23/WDTRST#, then to WDTRST# */
- superio_clear_bit(watchdog.sioaddr, SIO_REG_MFUNCT2, 3);
- superio_clear_bit(watchdog.sioaddr, SIO_REG_MFUNCT3, 3);
+ superio_clear_bit(wd->sioaddr, SIO_REG_MFUNCT2, 3);
+ superio_clear_bit(wd->sioaddr, SIO_REG_MFUNCT3, 3);
break;
case f71862fg:
if (f71862fg_pin == 63) {
/* SPI must be disabled first to use this pin! */
- superio_clear_bit(watchdog.sioaddr, SIO_REG_ROM_ADDR_SEL, 6);
- superio_set_bit(watchdog.sioaddr, SIO_REG_MFUNCT3, 4);
+ superio_clear_bit(wd->sioaddr, SIO_REG_ROM_ADDR_SEL, 6);
+ superio_set_bit(wd->sioaddr, SIO_REG_MFUNCT3, 4);
} else if (f71862fg_pin == 56) {
- superio_set_bit(watchdog.sioaddr, SIO_REG_MFUNCT1, 1);
+ superio_set_bit(wd->sioaddr, SIO_REG_MFUNCT1, 1);
}
break;
case f71868:
case f71869:
/* GPIO14 --> WDTRST# */
- superio_clear_bit(watchdog.sioaddr, SIO_REG_MFUNCT1, 4);
+ superio_clear_bit(wd->sioaddr, SIO_REG_MFUNCT1, 4);
break;
case f71882fg:
/* Set pin 56 to WDTRST# */
- superio_set_bit(watchdog.sioaddr, SIO_REG_MFUNCT1, 1);
+ superio_set_bit(wd->sioaddr, SIO_REG_MFUNCT1, 1);
break;
case f71889fg:
/* set pin 40 to WDTRST# */
- superio_outb(watchdog.sioaddr, SIO_REG_MFUNCT3,
- superio_inb(watchdog.sioaddr, SIO_REG_MFUNCT3) & 0xcf);
+ superio_outb(wd->sioaddr, SIO_REG_MFUNCT3,
+ superio_inb(wd->sioaddr, SIO_REG_MFUNCT3) & 0xcf);
break;
case f81803:
/* Enable TSI Level register bank */
- superio_clear_bit(watchdog.sioaddr, SIO_REG_CLOCK_SEL, 3);
+ superio_clear_bit(wd->sioaddr, SIO_REG_CLOCK_SEL, 3);
/* Set pin 27 to WDTRST# */
- superio_outb(watchdog.sioaddr, SIO_REG_TSI_LEVEL_SEL, 0x5f &
- superio_inb(watchdog.sioaddr, SIO_REG_TSI_LEVEL_SEL));
+ superio_outb(wd->sioaddr, SIO_REG_TSI_LEVEL_SEL, 0x5f &
+ superio_inb(wd->sioaddr, SIO_REG_TSI_LEVEL_SEL));
break;
case f81865:
/* Set pin 70 to WDTRST# */
- superio_clear_bit(watchdog.sioaddr, SIO_REG_MFUNCT3, 5);
+ superio_clear_bit(wd->sioaddr, SIO_REG_MFUNCT3, 5);
break;
case f81866:
@@ -348,12 +354,12 @@ static int fintek_wdt_start(struct watchdog_device *wdd)
* BIT5: 0 -> WDTRST#
* 1 -> GPIO15
*/
- tmp = superio_inb(watchdog.sioaddr, SIO_F81866_REG_PORT_SEL);
+ tmp = superio_inb(wd->sioaddr, SIO_F81866_REG_PORT_SEL);
tmp &= ~(BIT(3) | BIT(0));
tmp |= BIT(2);
- superio_outb(watchdog.sioaddr, SIO_F81866_REG_PORT_SEL, tmp);
+ superio_outb(wd->sioaddr, SIO_F81866_REG_PORT_SEL, tmp);
- superio_clear_bit(watchdog.sioaddr, SIO_F81866_REG_GPIO1, 5);
+ superio_clear_bit(wd->sioaddr, SIO_F81866_REG_GPIO1, 5);
break;
default:
@@ -365,63 +371,64 @@ static int fintek_wdt_start(struct watchdog_device *wdd)
goto exit_superio;
}
- superio_select(watchdog.sioaddr, SIO_F71808FG_LD_WDT);
- superio_set_bit(watchdog.sioaddr, SIO_REG_ENABLE, 0);
+ superio_select(wd->sioaddr, SIO_F71808FG_LD_WDT);
+ superio_set_bit(wd->sioaddr, SIO_REG_ENABLE, 0);
- if (watchdog.type == f81865 || watchdog.type == f81866)
- superio_set_bit(watchdog.sioaddr, F81865_REG_WDO_CONF,
+ if (wd->type == f81865 || wd->type == f81866)
+ superio_set_bit(wd->sioaddr, F81865_REG_WDO_CONF,
F81865_FLAG_WDOUT_EN);
else
- superio_set_bit(watchdog.sioaddr, F71808FG_REG_WDO_CONF,
+ superio_set_bit(wd->sioaddr, F71808FG_REG_WDO_CONF,
F71808FG_FLAG_WDOUT_EN);
- superio_set_bit(watchdog.sioaddr, F71808FG_REG_WDT_CONF,
+ superio_set_bit(wd->sioaddr, F71808FG_REG_WDT_CONF,
F71808FG_FLAG_WD_EN);
- if (watchdog.pulse_mode) {
+ if (wd->pulse_mode) {
/* Select "pulse" output mode with given duration */
- u8 wdt_conf = superio_inb(watchdog.sioaddr,
+ u8 wdt_conf = superio_inb(wd->sioaddr,
F71808FG_REG_WDT_CONF);
/* Set WD_PSWIDTH bits (1:0) */
- wdt_conf = (wdt_conf & 0xfc) | (watchdog.pulse_val & 0x03);
+ wdt_conf = (wdt_conf & 0xfc) | (wd->pulse_val & 0x03);
/* Set WD_PULSE to "pulse" mode */
wdt_conf |= BIT(F71808FG_FLAG_WD_PULSE);
- superio_outb(watchdog.sioaddr, F71808FG_REG_WDT_CONF,
+ superio_outb(wd->sioaddr, F71808FG_REG_WDT_CONF,
wdt_conf);
} else {
/* Select "level" output mode */
- superio_clear_bit(watchdog.sioaddr, F71808FG_REG_WDT_CONF,
+ superio_clear_bit(wd->sioaddr, F71808FG_REG_WDT_CONF,
F71808FG_FLAG_WD_PULSE);
}
exit_superio:
- superio_exit(watchdog.sioaddr);
+ superio_exit(wd->sioaddr);
return err;
}
static int fintek_wdt_stop(struct watchdog_device *wdd)
{
+ struct fintek_wdt *wd = watchdog_get_drvdata(wdd);
int err;
- err = superio_enter(watchdog.sioaddr);
+ err = superio_enter(wd->sioaddr);
if (err)
return err;
- superio_select(watchdog.sioaddr, SIO_F71808FG_LD_WDT);
+ superio_select(wd->sioaddr, SIO_F71808FG_LD_WDT);
- superio_clear_bit(watchdog.sioaddr, F71808FG_REG_WDT_CONF,
+ superio_clear_bit(wd->sioaddr, F71808FG_REG_WDT_CONF,
F71808FG_FLAG_WD_EN);
- superio_exit(watchdog.sioaddr);
+ superio_exit(wd->sioaddr);
return 0;
}
-static bool fintek_wdt_is_running(u8 wdt_conf)
+static bool fintek_wdt_is_running(struct fintek_wdt *wd, u8 wdt_conf)
{
- return (superio_inb(watchdog.sioaddr, SIO_REG_ENABLE) & BIT(0))
+ return (superio_inb(wd->sioaddr, SIO_REG_ENABLE) & BIT(0))
&& (wdt_conf & BIT(F71808FG_FLAG_WD_EN));
}
@@ -435,7 +442,9 @@ static const struct watchdog_ops fintek_wdt_ops = {
static int fintek_wdt_probe(struct platform_device *pdev)
{
+ struct fintek_wdt_pdata *pdata;
struct watchdog_device *wdd;
+ struct fintek_wdt *wd;
int wdt_conf, err = 0;
struct resource *res;
int sioaddr;
@@ -446,20 +455,27 @@ static int fintek_wdt_probe(struct platform_device *pdev)
sioaddr = res->start;
- watchdog.sioaddr = sioaddr;
- watchdog.ident.options = WDIOF_SETTIMEOUT
- | WDIOF_MAGICCLOSE
- | WDIOF_KEEPALIVEPING
- | WDIOF_CARDRESET;
+ wd = devm_kzalloc(&pdev->dev, sizeof(*wd), GFP_KERNEL);
+ if (!wd)
+ return -ENOMEM;
+
+ pdata = pdev->dev.platform_data;
+
+ wd->type = pdata->type;
+ wd->sioaddr = sioaddr;
+ wd->ident.options = WDIOF_SETTIMEOUT
+ | WDIOF_MAGICCLOSE
+ | WDIOF_KEEPALIVEPING
+ | WDIOF_CARDRESET;
- snprintf(watchdog.ident.identity,
- sizeof(watchdog.ident.identity), "%s watchdog",
- fintek_wdt_names[watchdog.type]);
+ snprintf(wd->ident.identity,
+ sizeof(wd->ident.identity), "%s watchdog",
+ fintek_wdt_names[wd->type]);
err = superio_enter(sioaddr);
if (err)
return err;
- superio_select(watchdog.sioaddr, SIO_F71808FG_LD_WDT);
+ superio_select(wd->sioaddr, SIO_F71808FG_LD_WDT);
wdt_conf = superio_inb(sioaddr, F71808FG_REG_WDT_CONF);
@@ -470,19 +486,20 @@ static int fintek_wdt_probe(struct platform_device *pdev)
superio_outb(sioaddr, F71808FG_REG_WDT_CONF,
wdt_conf | BIT(F71808FG_FLAG_WDTMOUT_STS));
- wdd = &watchdog.wdd;
+ wdd = &wd->wdd;
- if (fintek_wdt_is_running(wdt_conf))
+ if (fintek_wdt_is_running(wd, wdt_conf))
set_bit(WDOG_HW_RUNNING, &wdd->status);
superio_exit(sioaddr);
wdd->parent = &pdev->dev;
- wdd->info = &watchdog.ident;
+ wdd->info = &wd->ident;
wdd->ops = &fintek_wdt_ops;
wdd->min_timeout = 1;
wdd->max_timeout = max_timeout;
+ watchdog_set_drvdata(wdd, wd);
watchdog_set_nowayout(wdd, nowayout);
watchdog_stop_on_unregister(wdd);
watchdog_stop_on_reboot(wdd);
@@ -496,13 +513,14 @@ static int fintek_wdt_probe(struct platform_device *pdev)
* called without a set_timeout before, so it needs to be done here once
*/
fintek_wdt_set_timeout(wdd, timeout);
- fintek_wdt_set_pulse_width(pulse_width);
+ fintek_wdt_set_pulse_width(wd, pulse_width);
return devm_watchdog_register_device(&pdev->dev, wdd);
}
static int __init fintek_wdt_find(int sioaddr)
{
+ enum chips type;
u16 devid;
int err = superio_enter(sioaddr);
if (err)
@@ -518,36 +536,36 @@ static int __init fintek_wdt_find(int sioaddr)
devid = force_id ? force_id : superio_inw(sioaddr, SIO_REG_DEVID);
switch (devid) {
case SIO_F71808_ID:
- watchdog.type = f71808fg;
+ type = f71808fg;
break;
case SIO_F71862_ID:
- watchdog.type = f71862fg;
+ type = f71862fg;
break;
case SIO_F71868_ID:
- watchdog.type = f71868;
+ type = f71868;
break;
case SIO_F71869_ID:
case SIO_F71869A_ID:
- watchdog.type = f71869;
+ type = f71869;
break;
case SIO_F71882_ID:
- watchdog.type = f71882fg;
+ type = f71882fg;
break;
case SIO_F71889_ID:
- watchdog.type = f71889fg;
+ type = f71889fg;
break;
case SIO_F71858_ID:
/* Confirmed (by datasheet) not to have a watchdog. */
err = -ENODEV;
goto exit;
case SIO_F81803_ID:
- watchdog.type = f81803;
+ type = f81803;
break;
case SIO_F81865_ID:
- watchdog.type = f81865;
+ type = f81865;
break;
case SIO_F81866_ID:
- watchdog.type = f81866;
+ type = f81866;
break;
default:
pr_info("Unrecognized Fintek device: %04x\n",
@@ -557,11 +575,12 @@ static int __init fintek_wdt_find(int sioaddr)
}
pr_info("Found %s watchdog chip, revision %d\n",
- fintek_wdt_names[watchdog.type],
+ fintek_wdt_names[type],
(int)superio_inb(sioaddr, SIO_REG_DEVREV));
+
exit:
superio_exit(sioaddr);
- return err;
+ return err ? err : type;
}
static struct platform_driver fintek_wdt_driver = {
@@ -576,8 +595,9 @@ static struct platform_device *fintek_wdt_pdev;
static int __init fintek_wdt_init(void)
{
static const unsigned short addrs[] = { 0x2e, 0x4e };
+ struct fintek_wdt_pdata pdata;
struct resource wdt_res = {};
- int err = -ENODEV;
+ int ret;
int i;
if (f71862fg_pin != 63 && f71862fg_pin != 56) {
@@ -586,12 +606,14 @@ static int __init fintek_wdt_init(void)
}
for (i = 0; i < ARRAY_SIZE(addrs); i++) {
- err = fintek_wdt_find(addrs[i]);
- if (err == 0)
+ ret = fintek_wdt_find(addrs[i]);
+ if (ret >= 0)
break;
}
if (i == ARRAY_SIZE(addrs))
- return err;
+ return ret;
+
+ pdata.type = ret;
platform_driver_register(&fintek_wdt_driver);
@@ -600,7 +622,9 @@ static int __init fintek_wdt_init(void)
wdt_res.start = addrs[i];
wdt_res.end = addrs[i] + 1;
- fintek_wdt_pdev = platform_device_register_simple(DRVNAME, -1, &wdt_res, 1);
+ fintek_wdt_pdev = platform_device_register_resndata(NULL, DRVNAME, -1,
+ &wdt_res, 1,
+ &pdata, sizeof(pdata));
if (IS_ERR(fintek_wdt_pdev)) {
platform_driver_unregister(&fintek_wdt_driver);
return PTR_ERR(fintek_wdt_pdev);
--
git-series 0.9.1
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