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path: root/drivers/platform/x86/amd/pmc.c
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Diffstat (limited to 'drivers/platform/x86/amd/pmc.c')
-rw-r--r--drivers/platform/x86/amd/pmc.c60
1 files changed, 57 insertions, 3 deletions
diff --git a/drivers/platform/x86/amd/pmc.c b/drivers/platform/x86/amd/pmc.c
index 439d282aafd1..3cbb01ec10e3 100644
--- a/drivers/platform/x86/amd/pmc.c
+++ b/drivers/platform/x86/amd/pmc.c
@@ -22,6 +22,7 @@
#include <linux/pci.h>
#include <linux/platform_device.h>
#include <linux/rtc.h>
+#include <linux/serio.h>
#include <linux/suspend.h>
#include <linux/seq_file.h>
#include <linux/uaccess.h>
@@ -160,6 +161,10 @@ static bool enable_stb;
module_param(enable_stb, bool, 0644);
MODULE_PARM_DESC(enable_stb, "Enable the STB debug mechanism");
+static bool disable_workarounds;
+module_param(disable_workarounds, bool, 0644);
+MODULE_PARM_DESC(disable_workarounds, "Disable workarounds for platform bugs");
+
static struct amd_pmc_dev pmc;
static int amd_pmc_send_cmd(struct amd_pmc_dev *dev, u32 arg, u32 *data, u8 msg, bool ret);
static int amd_pmc_read_stb(struct amd_pmc_dev *dev, u32 *buf);
@@ -653,6 +658,33 @@ static int amd_pmc_get_os_hint(struct amd_pmc_dev *dev)
return -EINVAL;
}
+static int amd_pmc_czn_wa_irq1(struct amd_pmc_dev *pdev)
+{
+ struct device *d;
+ int rc;
+
+ if (!pdev->major) {
+ rc = amd_pmc_get_smu_version(pdev);
+ if (rc)
+ return rc;
+ }
+
+ if (pdev->major > 64 || (pdev->major == 64 && pdev->minor > 65))
+ return 0;
+
+ d = bus_find_device_by_name(&serio_bus, NULL, "serio0");
+ if (!d)
+ return 0;
+ if (device_may_wakeup(d)) {
+ dev_info_once(d, "Disabling IRQ1 wakeup source to avoid platform firmware bug\n");
+ disable_irq_wake(1);
+ device_set_wakeup_enable(d, false);
+ }
+ put_device(d);
+
+ return 0;
+}
+
static int amd_pmc_verify_czn_rtc(struct amd_pmc_dev *pdev, u32 *arg)
{
struct rtc_device *rtc_device;
@@ -715,8 +747,8 @@ static void amd_pmc_s2idle_prepare(void)
/* Reset and Start SMU logging - to monitor the s0i3 stats */
amd_pmc_setup_smu_logging(pdev);
- /* Activate CZN specific RTC functionality */
- if (pdev->cpu_id == AMD_CPU_ID_CZN) {
+ /* Activate CZN specific platform bug workarounds */
+ if (pdev->cpu_id == AMD_CPU_ID_CZN && !disable_workarounds) {
rc = amd_pmc_verify_czn_rtc(pdev, &arg);
if (rc) {
dev_err(pdev->dev, "failed to set RTC: %d\n", rc);
@@ -782,6 +814,25 @@ static struct acpi_s2idle_dev_ops amd_pmc_s2idle_dev_ops = {
.check = amd_pmc_s2idle_check,
.restore = amd_pmc_s2idle_restore,
};
+
+static int __maybe_unused amd_pmc_suspend_handler(struct device *dev)
+{
+ struct amd_pmc_dev *pdev = dev_get_drvdata(dev);
+
+ if (pdev->cpu_id == AMD_CPU_ID_CZN && !disable_workarounds) {
+ int rc = amd_pmc_czn_wa_irq1(pdev);
+
+ if (rc) {
+ dev_err(pdev->dev, "failed to adjust keyboard wakeup: %d\n", rc);
+ return rc;
+ }
+ }
+
+ return 0;
+}
+
+static SIMPLE_DEV_PM_OPS(amd_pmc_pm, amd_pmc_suspend_handler, NULL);
+
#endif
static const struct pci_device_id pmc_pci_ids[] = {
@@ -932,7 +983,7 @@ static int amd_pmc_probe(struct platform_device *pdev)
if (enable_stb && (dev->cpu_id == AMD_CPU_ID_YC || dev->cpu_id == AMD_CPU_ID_CB)) {
err = amd_pmc_s2d_init(dev);
if (err)
- return err;
+ goto err_pci_dev_put;
}
platform_set_drvdata(pdev, dev);
@@ -980,6 +1031,9 @@ static struct platform_driver amd_pmc_driver = {
.name = "amd_pmc",
.acpi_match_table = amd_pmc_acpi_ids,
.dev_groups = pmc_groups,
+#ifdef CONFIG_SUSPEND
+ .pm = &amd_pmc_pm,
+#endif
},
.probe = amd_pmc_probe,
.remove = amd_pmc_remove,