From: Li Jun <jun.li@freescale.com>
Date: Thu, 29 Jan 2015 02:26:52 +0000 (+0800)
Subject: MLK-10174-1 arm: imx: gpc: export an interface to keep mega fast power
X-Git-Tag: C0P2-H0.0--20200415~4511
X-Git-Url: https://git.somdevices.com/?a=commitdiff_plain;h=b4c25ff8063a65e188475fa38ad799015f30febb;p=linux.git

MLK-10174-1 arm: imx: gpc: export an interface to keep mega fast power

Add an interface for GPC used by drivers to keep mega fast mix domain
power.

Signed-off-by: Li Jun <jun.li@freescale.com>
(cherry picked from commit f40b0d57803b26a889d12cb70f128801ef75055a)
---

diff --git a/arch/arm/mach-imx/common.h b/arch/arm/mach-imx/common.h
index 4a46191677b8..4719b3fd0a25 100644
--- a/arch/arm/mach-imx/common.h
+++ b/arch/arm/mach-imx/common.h
@@ -103,6 +103,8 @@ void imx_gpcv2_pre_suspend(bool arm_power_off);
 void imx_gpcv2_post_resume(void);
 void imx_gpcv2_set_core1_pdn_pup_by_software(bool pdn);
 unsigned int imx_gpcv2_is_mf_mix_off(void);
+int imx_gpc_mf_power_on(unsigned int irq, unsigned int on);
+int imx_gpcv2_mf_power_on(unsigned int irq, unsigned int on);
 void __init imx_gpcv2_check_dt(void);
 void imx_gpcv2_set_lpm_mode(enum mxc_cpu_pwr_mode mode);
 void imx_gpcv2_set_cpu_power_gate_in_idle(bool pdn);
diff --git a/arch/arm/mach-imx/gpc.c b/arch/arm/mach-imx/gpc.c
index 2a420d6414cc..a854416916d0 100644
--- a/arch/arm/mach-imx/gpc.c
+++ b/arch/arm/mach-imx/gpc.c
@@ -57,6 +57,7 @@ static u32 gpc_wake_irqs[IMR_NUM];
 static u32 gpc_saved_imrs[IMR_NUM];
 static u32 gpc_mf_irqs[IMR_NUM];
 static u32 gpc_mf_request_on[IMR_NUM];
+static DEFINE_SPINLOCK(gpc_lock);
 
 unsigned int imx_gpc_is_mf_mix_off(void)
 {
@@ -267,6 +268,33 @@ static const struct irq_domain_ops imx_gpc_domain_ops = {
 	.free		= irq_domain_free_irqs_common,
 };
 
+int imx_gpc_mf_power_on(unsigned int irq, unsigned int on)
+{
+	struct irq_desc *d = irq_to_desc(irq);
+	unsigned int idx = d->irq_data.hwirq / 32;
+	unsigned long flags;
+	u32 mask;
+
+	mask = 1 << (d->irq_data.hwirq % 32);
+	spin_lock_irqsave(&gpc_lock, flags);
+	gpc_mf_request_on[idx] = on ? gpc_mf_request_on[idx] | mask :
+				  gpc_mf_request_on[idx] & ~mask;
+	spin_unlock_irqrestore(&gpc_lock, flags);
+
+	return 0;
+}
+
+int imx_gpc_mf_request_on(unsigned int irq, unsigned int on)
+{
+	if (cpu_is_imx6sx() || cpu_is_imx6ul())
+		return imx_gpc_mf_power_on(irq, on);
+	else if (cpu_is_imx7d())
+		return imx_gpcv2_mf_power_on(irq, on);
+	else
+		return 0;
+}
+EXPORT_SYMBOL_GPL(imx_gpc_mf_request_on);
+
 static int __init imx_gpc_init(struct device_node *node,
 			       struct device_node *parent)
 {
diff --git a/include/linux/imx_gpc.h b/include/linux/imx_gpc.h
new file mode 100644
index 000000000000..2cffa4be22aa
--- /dev/null
+++ b/include/linux/imx_gpc.h
@@ -0,0 +1,25 @@
+/*
+ * Copyright (C) 2015 Freescale Semiconductor, Inc.
+ */
+
+/*
+ * The code contained herein is licensed under the GNU Lesser General
+ * Public License.  You may obtain a copy of the GNU Lesser General
+ * Public License Version 2.1 or later at the following locations:
+ *
+ * http://www.opensource.org/licenses/lgpl-license.html
+ * http://www.gnu.org/copyleft/lgpl.html
+ */
+
+/*
+ * @file linux/imx_gpc.h
+ *
+ * @brief Global header file for imx GPC
+ *
+ * @ingroup GPC
+ */
+#ifndef __LINUX_IMX_GPC_H__
+#define __LINUX_IMX_GPC_H__
+
+int imx_gpc_mf_request_on(unsigned int irq, unsigned int on);
+#endif /* __LINUX_IMX_GPC_H__ */