Linux-libre 4.8.2-gnupck-4.8.2-gnu

1 files changed, 82 insertions, 0 deletions

diff --git a/drivers/pci/pci-mid.c b/drivers/pci/pci-mid.c
new file mode 100644
index 000000000..55f453de5
--- /dev/null
+++ b/drivers/pci/pci-mid.c
@@ -0,0 +1,82 @@
+/*
+ * Intel MID platform PM support
+ *
+ * Copyright (C) 2016, Intel Corporation
+ *
+ * Author: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ */
+
+#include <linux/init.h>
+#include <linux/pci.h>
+
+#include <asm/cpu_device_id.h>
+#include <asm/intel-family.h>
+#include <asm/intel-mid.h>
+
+#include "pci.h"
+
+static bool mid_pci_power_manageable(struct pci_dev *dev)
+{
+	return true;
+}
+
+static int mid_pci_set_power_state(struct pci_dev *pdev, pci_power_t state)
+{
+	return intel_mid_pci_set_power_state(pdev, state);
+}
+
+static pci_power_t mid_pci_choose_state(struct pci_dev *pdev)
+{
+	return PCI_D3hot;
+}
+
+static int mid_pci_sleep_wake(struct pci_dev *dev, bool enable)
+{
+	return 0;
+}
+
+static int mid_pci_run_wake(struct pci_dev *dev, bool enable)
+{
+	return 0;
+}
+
+static bool mid_pci_need_resume(struct pci_dev *dev)
+{
+	return false;
+}
+
+static struct pci_platform_pm_ops mid_pci_platform_pm = {
+	.is_manageable	= mid_pci_power_manageable,
+	.set_state	= mid_pci_set_power_state,
+	.choose_state	= mid_pci_choose_state,
+	.sleep_wake	= mid_pci_sleep_wake,
+	.run_wake	= mid_pci_run_wake,
+	.need_resume	= mid_pci_need_resume,
+};
+
+#define ICPU(model)	{ X86_VENDOR_INTEL, 6, model, X86_FEATURE_ANY, }
+
+/*
+ * This table should be in sync with the one in
+ * arch/x86/platform/intel-mid/pwr.c.
+ */
+static const struct x86_cpu_id lpss_cpu_ids[] = {
+	ICPU(INTEL_FAM6_ATOM_PENWELL),
+	ICPU(INTEL_FAM6_ATOM_MERRIFIELD),
+	{}
+};
+
+static int __init mid_pci_init(void)
+{
+	const struct x86_cpu_id *id;
+
+	id = x86_match_cpu(lpss_cpu_ids);
+	if (id)
+		pci_set_platform_pm(&mid_pci_platform_pm);
+	return 0;
+}
+arch_initcall(mid_pci_init);