platform/x86: intel_int0002_vgpio: Only implement irq_set_wake on Bay Trail

Commit c3b8e884defa ("platform/x86: intel_int0002_vgpio: Implement irq_set_wake"),
was written to fix some wakeup issues on Bay Trail (BYT) devices.

We've received a bug report that this causes a suspend regression on some
Cherry Trail (CHT) based devices.

To fix the issues this causes on CHT devices, this commit modifies the
irq_set_wake support so that we only implement irq_set_wake on BYT devices,

Fixes: c3b8e884defa ("platform/x86: intel_int0002_vgpio: ... irq_set_wake")
Reported-and-tested-by: Maxim Mikityanskiy <maxtram95@gmail.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

1 files changed, 26 insertions, 6 deletions

diff --git a/drivers/platform/x86/intel_int0002_vgpio.c b/drivers/platform/x86/intel_int0002_vgpio.c
index 4b8f7305fc8a..1694a9aec77c 100644
--- a/drivers/platform/x86/intel_int0002_vgpio.c
+++ b/drivers/platform/x86/intel_int0002_vgpio.c
@@ -51,11 +51,14 @@
 #define GPE0A_STS_PORT                  0x420
 #define GPE0A_EN_PORT                   0x428
 
-#define ICPU(model)     { X86_VENDOR_INTEL, 6, model, X86_FEATURE_ANY, }
+#define BAYTRAIL                        0x01
+#define CHERRYTRAIL                     0x02
+
+#define ICPU(model, data) { X86_VENDOR_INTEL, 6, model, X86_FEATURE_ANY, data }
 
 static const struct x86_cpu_id int0002_cpu_ids[] = {
-        ICPU(INTEL_FAM6_ATOM_SILVERMONT),       /* Valleyview, Bay Trail  */
-        ICPU(INTEL_FAM6_ATOM_AIRMONT),          /* Braswell, Cherry Trail */
+        ICPU(INTEL_FAM6_ATOM_SILVERMONT, BAYTRAIL), /* Valleyview, Bay Trail  */
+        ICPU(INTEL_FAM6_ATOM_AIRMONT, CHERRYTRAIL), /* Braswell, Cherry Trail */
         {}
 };
 
@@ -135,7 +138,7 @@ static irqreturn_t int0002_irq(int irq, void *data)
         return IRQ_HANDLED;
 }
 
-static struct irq_chip int0002_irqchip = {
+static struct irq_chip int0002_byt_irqchip = {
         .name                   = DRV_NAME,
         .irq_ack                = int0002_irq_ack,
         .irq_mask               = int0002_irq_mask,
@@ -143,10 +146,22 @@ static struct irq_chip int0002_irqchip = {
         .irq_set_wake           = int0002_irq_set_wake,
 };
 
+static struct irq_chip int0002_cht_irqchip = {
+        .name                   = DRV_NAME,
+        .irq_ack                = int0002_irq_ack,
+        .irq_mask               = int0002_irq_mask,
+        .irq_unmask             = int0002_irq_unmask,
+        /*
+         * No set_wake, on CHT the IRQ is typically shared with the ACPI SCI
+         * and we don't want to mess with the ACPI SCI irq settings.
+         */
+};
+
 static int int0002_probe(struct platform_device *pdev)
 {
         struct device *dev = &pdev->dev;
         const struct x86_cpu_id *cpu_id;
+        struct irq_chip *irq_chip;
         struct gpio_chip *chip;
         int irq, ret;
 
@@ -195,14 +210,19 @@ static int int0002_probe(struct platform_device *pdev)
                 return ret;
         }
 
-        ret = gpiochip_irqchip_add(chip, &int0002_irqchip, 0, handle_edge_irq,
+        if (cpu_id->driver_data == BAYTRAIL)
+                irq_chip = &int0002_byt_irqchip;
+        else
+                irq_chip = &int0002_cht_irqchip;
+
+        ret = gpiochip_irqchip_add(chip, irq_chip, 0, handle_edge_irq,
                                    IRQ_TYPE_NONE);
         if (ret) {
                 dev_err(dev, "Error adding irqchip: %d\n", ret);
                 return ret;
         }
 
-        gpiochip_set_chained_irqchip(chip, &int0002_irqchip, irq, NULL);
+        gpiochip_set_chained_irqchip(chip, irq_chip, irq, NULL);
 
         return 0;
 }