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Date: Fri, 6 Sep 2013 14:46:55 +0800
From: <hongbo.zhang@...escale.com>
To: <LCTBJ@...escale.com>
CC: <linux-kernel@...r.kernel.org>,
Hongbo Zhang <hongbo.zhang@...escale.com>
Subject: [PATCH 2/2] fsl: set wakeup sources
From: Hongbo Zhang <hongbo.zhang@...escale.com>
Some devices can work as wakeup sources, they should be powerred on during
system deep sleep, this patch adds interface for configuring devices power
supply status during deep sleep.
Signed-off-by: Hongbo Zhang <hongbo.zhang@...escale.com>
---
arch/powerpc/boot/dts/fsl/qoriq-power.dtsi | 73 ++++++++++++++++++++++++++++
arch/powerpc/sysdev/fsl_rcpm.c | 43 ++++++++++++++++
2 files changed, 116 insertions(+)
create mode 100644 arch/powerpc/boot/dts/fsl/qoriq-power.dtsi
diff --git a/arch/powerpc/boot/dts/fsl/qoriq-power.dtsi b/arch/powerpc/boot/dts/fsl/qoriq-power.dtsi
new file mode 100644
index 0000000..c5c2ba0
--- /dev/null
+++ b/arch/powerpc/boot/dts/fsl/qoriq-power.dtsi
@@ -0,0 +1,73 @@
+/*
+ * QorIQ Power Management device tree stub
+ *
+ * Copyright 2013 Freescale Semiconductor Inc.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * * Neither the name of Freescale Semiconductor nor the
+ * names of its contributors may be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ *
+ * ALTERNATIVELY, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") as published by the Free Software
+ * Foundation, either version 2 of that License or (at your option) any
+ * later version.
+ *
+ * THIS SOFTWARE IS PROVIDED BY Freescale Semiconductor ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL Freescale Semiconductor BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/* IPPDEXPCR: IP Power Down EXcePtion Control Register */
+rcpm-power@...40 {
+ compatible = "fsl,rcpm-ippdexpcr";
+ reg = <0xe2140 0x4>;
+
+ mac1_1_power: soc-power@0 {
+ fsl,ippdexpcr-mask = <0x80000000>;
+ };
+ mac1_2_power: soc-power@1 {
+ fsl,ippdexpcr-mask = <0x40000000>;
+ };
+ mac1_3_power: soc-power@2 {
+ fsl,ippdexpcr-mask = <0x20000000>;
+ };
+ mac1_4_power: soc-power@3 {
+ fsl,ippdexpcr-mask = <0x10000000>;
+ };
+ mac1_5_power: soc-power@4 {
+ fsl,ippdexpcr-mask = <0x08000000>;
+ };
+ sdhc_power: soc-power@24 {
+ fsl,ippdexpcr-mask = <0x00000080>;
+ };
+ gpio_power: soc-power@25 {
+ fsl,ippdexpcr-mask = <0x00000040>;
+ };
+ usb1_power: soc-power@26 {
+ fsl,ippdexpcr-mask = <0x00000020>;
+ };
+ usb2_power: soc-power@27 {
+ fsl,ippdexpcr-mask = <0x00000010>;
+ };
+ fman1_power: soc-power@28 {
+ fsl,ippdexpcr-mask = <0x00000008>;
+ };
+ sap_power: soc-power@31 {
+ fsl,ippdexpcr-mask = <0x00000001>;
+ };
+};
diff --git a/arch/powerpc/sysdev/fsl_rcpm.c b/arch/powerpc/sysdev/fsl_rcpm.c
index ecf43a2..bc21aea 100644
--- a/arch/powerpc/sysdev/fsl_rcpm.c
+++ b/arch/powerpc/sysdev/fsl_rcpm.c
@@ -23,6 +23,49 @@
struct ccsr_rcpm __iomem *rcpm1_regs;
struct ccsr_rcpm_v2 __iomem *rcpm2_regs;
+/**
+ * fsl_rcpm_set_wake - enable/disable device working as wakeup source
+ * @dev: device affected
+ * @enable: true for keeping power on for this device during deep sleep
+ * false otherwise
+ *
+ * return 0 on success, return -EINVAL if the device cannot wake up system
+ * and -ENODEV if RCPM unavailable
+ */
+int fsl_rcpm_set_wake(struct device *dev, bool enable)
+{
+ int ret = 0;
+ struct device_node *pw_np;
+ u32 pw_mask;
+
+ if (!rcpm2_regs) {
+ dev_err(dev, "%s: RCPM is unavailable\n", __func__);
+ return -ENODEV;
+ }
+
+ if (enable && !device_may_wakeup(dev))
+ return -EINVAL;
+
+ pw_np = of_parse_phandle(dev->of_node, "fsl,rcpm-handle", 0);
+ if (!pw_np)
+ return -EINVAL;
+
+ if (of_property_read_u32(pw_np, "fsl,ippdexpcr-mask", &pw_mask)) {
+ ret = -EINVAL;
+ goto out;
+ }
+
+ if (enable)
+ /* clear to enable power in deep sleep mode */
+ clrbits32(&rcpm2_regs->ippdexpcr[0], pw_mask);
+ else
+ setbits32(&rcpm2_regs->ippdexpcr[0], pw_mask);
+
+out:
+ return ret;
+}
+EXPORT_SYMBOL_GPL(fsl_rcpm_set_wake);
+
static int rcpm_suspend_enter(suspend_state_t state)
{
int ret = 0;
--
1.7.9.5
--
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