1 files changed, 55 insertions, 0 deletions
diff --git a/arch/arm/mach-pxa/mfp-pxa3xx.c b/arch/arm/mach-pxa/mfp-pxa3xx.c
new file mode 100644
index 000000000..d16ab7451
--- /dev/null
+++ b/arch/arm/mach-pxa/mfp-pxa3xx.c
@@ -0,0 +1,55 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * linux/arch/arm/mach-pxa/mfp.c
+ *
+ * PXA3xx Multi-Function Pin Support
+ *
+ * Copyright (C) 2007 Marvell Internation Ltd.
+ *
+ * 2007-08-21: eric miao <eric.miao@marvell.com>
+ *             initial version
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/syscore_ops.h>
+
+#include "mfp-pxa3xx.h"
+#include "pxa3xx-regs.h"
+
+#ifdef CONFIG_PM
+/*
+ * Configure the MFPs appropriately for suspend/resume.
+ * FIXME: this should probably depend on which system state we're
+ * entering - for instance, we might not want to place MFP pins in
+ * a pull-down mode if they're an active low chip select, and we're
+ * just entering standby.
+ */
+static int pxa3xx_mfp_suspend(void)
+{
+	mfp_config_lpm();
+	return 0;
+}
+
+static void pxa3xx_mfp_resume(void)
+{
+	mfp_config_run();
+
+	/* clear RDH bit when MFP settings are restored
+	 *
+	 * NOTE: the last 3 bits DxS are write-1-to-clear so carefully
+	 * preserve them here in case they will be referenced later
+	 */
+	ASCR &= ~(ASCR_RDH | ASCR_D1S | ASCR_D2S | ASCR_D3S);
+}
+#else
+#define pxa3xx_mfp_suspend	NULL
+#define pxa3xx_mfp_resume	NULL
+#endif
+
+struct syscore_ops pxa3xx_mfp_syscore_ops = {
+	.suspend	= pxa3xx_mfp_suspend,
+	.resume		= pxa3xx_mfp_resume,
+};