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watchdog: intel-mid_wdt: Convert to use new SCU IPC API

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This converts the Intel MID watchdog driver over the new SCU IPC API
where the SCU IPC instance is passed to the functions.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Acked-by: Guenter Roeck <linux@roeck-us.net>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
This commit is contained in:
Mika Westerberg 2020-04-16 11:15:38 +03:00 committed by Lee Jones
parent 595694bd38
commit 80ae679b8f
1 changed files with 37 additions and 16 deletions
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53
drivers/watchdog/intel-mid_wdt.c
View file

@ -33,14 +33,24 @@ enum {
SCU_WATCHDOG_KEEPALIVE, SCU_WATCHDOG_KEEPALIVE,
}; };
static inline int wdt_command(int sub, u32 *in, int inlen) struct mid_wdt {
struct watchdog_device wd;
struct device *dev;
struct intel_scu_ipc_dev *scu;
};
static inline int
wdt_command(struct mid_wdt *mid, int sub, const void *in, size_t inlen, size_t size)
{ {
return intel_scu_ipc_command(IPC_WATCHDOG, sub, in, inlen, NULL, 0); struct intel_scu_ipc_dev *scu = mid->scu;
return intel_scu_ipc_dev_command_with_size(scu, IPC_WATCHDOG, sub, in,
inlen, size, NULL, 0);
} }
static int wdt_start(struct watchdog_device *wd) static int wdt_start(struct watchdog_device *wd)
{ {
struct device *dev = watchdog_get_drvdata(wd); struct mid_wdt *mid = watchdog_get_drvdata(wd);
int ret, in_size; int ret, in_size;
int timeout = wd->timeout; int timeout = wd->timeout;
struct ipc_wd_start { struct ipc_wd_start {
@ -49,38 +59,41 @@ static int wdt_start(struct watchdog_device *wd)
} ipc_wd_start = { timeout - MID_WDT_PRETIMEOUT, timeout }; } ipc_wd_start = { timeout - MID_WDT_PRETIMEOUT, timeout };
/* /*
* SCU expects the input size for watchdog IPC to * SCU expects the input size for watchdog IPC to be 2 which is the
* be based on 4 bytes * size of the structure in dwords. SCU IPC normally takes bytes
* but this is a special case where we specify size to be different
* than inlen.
*/ */
in_size = DIV_ROUND_UP(sizeof(ipc_wd_start), 4); in_size = DIV_ROUND_UP(sizeof(ipc_wd_start), 4);
ret = wdt_command(SCU_WATCHDOG_START, (u32 *)&ipc_wd_start, in_size); ret = wdt_command(mid, SCU_WATCHDOG_START, &ipc_wd_start,
sizeof(ipc_wd_start), in_size);
if (ret) if (ret)
dev_crit(dev, "error starting watchdog: %d\n", ret); dev_crit(mid->dev, "error starting watchdog: %d\n", ret);
return ret; return ret;
} }
static int wdt_ping(struct watchdog_device *wd) static int wdt_ping(struct watchdog_device *wd)
{ {
struct device *dev = watchdog_get_drvdata(wd); struct mid_wdt *mid = watchdog_get_drvdata(wd);
int ret; int ret;
ret = wdt_command(SCU_WATCHDOG_KEEPALIVE, NULL, 0); ret = wdt_command(mid, SCU_WATCHDOG_KEEPALIVE, NULL, 0, 0);
if (ret) if (ret)
dev_crit(dev, "Error executing keepalive: %d\n", ret); dev_crit(mid->dev, "Error executing keepalive: %d\n", ret);
return ret; return ret;
} }
static int wdt_stop(struct watchdog_device *wd) static int wdt_stop(struct watchdog_device *wd)
{ {
struct device *dev = watchdog_get_drvdata(wd); struct mid_wdt *mid = watchdog_get_drvdata(wd);
int ret; int ret;
ret = wdt_command(SCU_WATCHDOG_STOP, NULL, 0); ret = wdt_command(mid, SCU_WATCHDOG_STOP, NULL, 0, 0);
if (ret) if (ret)
dev_crit(dev, "Error stopping watchdog: %d\n", ret); dev_crit(mid->dev, "Error stopping watchdog: %d\n", ret);
return ret; return ret;
} }
@ -110,6 +123,7 @@ static int mid_wdt_probe(struct platform_device *pdev)
struct device *dev = &pdev->dev; struct device *dev = &pdev->dev;
struct watchdog_device *wdt_dev; struct watchdog_device *wdt_dev;
struct intel_mid_wdt_pdata *pdata = dev->platform_data; struct intel_mid_wdt_pdata *pdata = dev->platform_data;
struct mid_wdt *mid;
int ret; int ret;
if (!pdata) { if (!pdata) {
@ -123,10 +137,13 @@ static int mid_wdt_probe(struct platform_device *pdev)
return ret; return ret;
} }
wdt_dev = devm_kzalloc(dev, sizeof(*wdt_dev), GFP_KERNEL); mid = devm_kzalloc(dev, sizeof(*mid), GFP_KERNEL);
if (!wdt_dev) if (!mid)
return -ENOMEM; return -ENOMEM;
mid->dev = dev;
wdt_dev = &mid->wd;
wdt_dev->info = &mid_wdt_info; wdt_dev->info = &mid_wdt_info;
wdt_dev->ops = &mid_wdt_ops; wdt_dev->ops = &mid_wdt_ops;
wdt_dev->min_timeout = MID_WDT_TIMEOUT_MIN; wdt_dev->min_timeout = MID_WDT_TIMEOUT_MIN;
@ -135,7 +152,7 @@ static int mid_wdt_probe(struct platform_device *pdev)
wdt_dev->parent = dev; wdt_dev->parent = dev;
watchdog_set_nowayout(wdt_dev, WATCHDOG_NOWAYOUT); watchdog_set_nowayout(wdt_dev, WATCHDOG_NOWAYOUT);
watchdog_set_drvdata(wdt_dev, dev); watchdog_set_drvdata(wdt_dev, mid);
ret = devm_request_irq(dev, pdata->irq, mid_wdt_irq, ret = devm_request_irq(dev, pdata->irq, mid_wdt_irq,
IRQF_SHARED | IRQF_NO_SUSPEND, "watchdog", IRQF_SHARED | IRQF_NO_SUSPEND, "watchdog",
@ -145,6 +162,10 @@ static int mid_wdt_probe(struct platform_device *pdev)
return ret; return ret;
} }
mid->scu = devm_intel_scu_ipc_dev_get(dev);
if (!mid->scu)
return -EPROBE_DEFER;
/* /*
* The firmware followed by U-Boot leaves the watchdog running * The firmware followed by U-Boot leaves the watchdog running
* with the default threshold which may vary. When we get here * with the default threshold which may vary. When we get here