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authorAndy Shevchenko <andriy.shevchenko@linux.intel.com>2020-04-24 13:56:46 +0300
committerAndy Shevchenko <andriy.shevchenko@linux.intel.com>2020-04-24 13:56:46 +0300
commit4a65ed6562bcfa58fe0c2ca5855c45268f40d365 (patch)
tree072de56917dc218b75a4796f4605428959ec0dc9 /drivers/watchdog
parentb5f7311d3a2ed153f26b21c56d54a46d07a4da3f (diff)
parent2f72d35ea75ee8bf8c9e63fb43d43d5bfb4ac8fd (diff)
Merge branch 'ib-mfd-x86-usb-watchdog-v5.7'
Merge branch 'ib-mfd-x86-usb-watchdog-v5.7' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd.git to avoid conflicts in PDx86. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Diffstat (limited to 'drivers/watchdog')
-rw-r--r--drivers/watchdog/iTCO_wdt.c25
-rw-r--r--drivers/watchdog/intel-mid_wdt.c53
2 files changed, 56 insertions, 22 deletions
diff --git a/drivers/watchdog/iTCO_wdt.c b/drivers/watchdog/iTCO_wdt.c
index e707c4797f76..a370a185a41c 100644
--- a/drivers/watchdog/iTCO_wdt.c
+++ b/drivers/watchdog/iTCO_wdt.c
@@ -64,6 +64,7 @@
#include <linux/uaccess.h> /* For copy_to_user/put_user/... */
#include <linux/io.h> /* For inb/outb/... */
#include <linux/platform_data/itco_wdt.h>
+#include <linux/mfd/intel_pmc_bxt.h>
#include "iTCO_vendor.h"
@@ -233,12 +234,24 @@ static int update_no_reboot_bit_cnt(void *priv, bool set)
return val != newval ? -EIO : 0;
}
+static int update_no_reboot_bit_pmc(void *priv, bool set)
+{
+ struct intel_pmc_dev *pmc = priv;
+ u32 bits = PMC_CFG_NO_REBOOT_EN;
+ u32 value = set ? bits : 0;
+
+ return intel_pmc_gcr_update(pmc, PMC_GCR_PMC_CFG_REG, bits, value);
+}
+
static void iTCO_wdt_no_reboot_bit_setup(struct iTCO_wdt_private *p,
- struct itco_wdt_platform_data *pdata)
+ struct platform_device *pdev,
+ struct itco_wdt_platform_data *pdata)
{
- if (pdata->update_no_reboot_bit) {
- p->update_no_reboot_bit = pdata->update_no_reboot_bit;
- p->no_reboot_priv = pdata->no_reboot_priv;
+ if (pdata->no_reboot_use_pmc) {
+ struct intel_pmc_dev *pmc = dev_get_drvdata(pdev->dev.parent);
+
+ p->update_no_reboot_bit = update_no_reboot_bit_pmc;
+ p->no_reboot_priv = pmc;
return;
}
@@ -478,14 +491,14 @@ static int iTCO_wdt_probe(struct platform_device *pdev)
return -ENODEV;
}
- iTCO_wdt_no_reboot_bit_setup(p, pdata);
+ iTCO_wdt_no_reboot_bit_setup(p, pdev, pdata);
/*
* Get the Memory-Mapped GCS or PMC register, we need it for the
* NO_REBOOT flag (TCO v2 and v3).
*/
if (p->iTCO_version >= 2 && p->iTCO_version < 6 &&
- !pdata->update_no_reboot_bit) {
+ !pdata->no_reboot_use_pmc) {
p->gcs_pmc_res = platform_get_resource(pdev,
IORESOURCE_MEM,
ICH_RES_MEM_GCS_PMC);
diff --git a/drivers/watchdog/intel-mid_wdt.c b/drivers/watchdog/intel-mid_wdt.c
index 470213abfd3d..1ae03b64ef8b 100644
--- a/drivers/watchdog/intel-mid_wdt.c
+++ b/drivers/watchdog/intel-mid_wdt.c
@@ -33,14 +33,24 @@ enum {
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)
{
- struct device *dev = watchdog_get_drvdata(wd);
+ struct mid_wdt *mid = watchdog_get_drvdata(wd);
int ret, in_size;
int timeout = wd->timeout;
struct ipc_wd_start {
@@ -49,38 +59,41 @@ static int wdt_start(struct watchdog_device *wd)
} ipc_wd_start = { timeout - MID_WDT_PRETIMEOUT, timeout };
/*
- * SCU expects the input size for watchdog IPC to
- * be based on 4 bytes
+ * SCU expects the input size for watchdog IPC to be 2 which is the
+ * 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);
- 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)
- dev_crit(dev, "error starting watchdog: %d\n", ret);
+ dev_crit(mid->dev, "error starting watchdog: %d\n", ret);
return ret;
}
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;
- ret = wdt_command(SCU_WATCHDOG_KEEPALIVE, NULL, 0);
+ ret = wdt_command(mid, SCU_WATCHDOG_KEEPALIVE, NULL, 0, 0);
if (ret)
- dev_crit(dev, "Error executing keepalive: %d\n", ret);
+ dev_crit(mid->dev, "Error executing keepalive: %d\n", ret);
return ret;
}
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;
- ret = wdt_command(SCU_WATCHDOG_STOP, NULL, 0);
+ ret = wdt_command(mid, SCU_WATCHDOG_STOP, NULL, 0, 0);
if (ret)
- dev_crit(dev, "Error stopping watchdog: %d\n", ret);
+ dev_crit(mid->dev, "Error stopping watchdog: %d\n", ret);
return ret;
}
@@ -110,6 +123,7 @@ static int mid_wdt_probe(struct platform_device *pdev)
struct device *dev = &pdev->dev;
struct watchdog_device *wdt_dev;
struct intel_mid_wdt_pdata *pdata = dev->platform_data;
+ struct mid_wdt *mid;
int ret;
if (!pdata) {
@@ -123,10 +137,13 @@ static int mid_wdt_probe(struct platform_device *pdev)
return ret;
}
- wdt_dev = devm_kzalloc(dev, sizeof(*wdt_dev), GFP_KERNEL);
- if (!wdt_dev)
+ mid = devm_kzalloc(dev, sizeof(*mid), GFP_KERNEL);
+ if (!mid)
return -ENOMEM;
+ mid->dev = dev;
+ wdt_dev = &mid->wd;
+
wdt_dev->info = &mid_wdt_info;
wdt_dev->ops = &mid_wdt_ops;
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;
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,
IRQF_SHARED | IRQF_NO_SUSPEND, "watchdog",
@@ -145,6 +162,10 @@ static int mid_wdt_probe(struct platform_device *pdev)
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
* with the default threshold which may vary. When we get here