Re: [PATCH v3 4/5] soc: qcom: Driver for the Qualcomm RPM over SMD
On Mon, Jul 27, 2015 at 08:20:32PM -0700, Bjorn Andersson wrote: > Driver for the Resource Power Manager (RPM) found in Qualcomm 8974 based > devices. > The driver exposes resources that child drivers can operate on; to > implementing regulator, clock and bus frequency drivers. > > Signed-off-by: Bjorn Andersson > --- Applied, thanks! -- Qualcomm Innovation Center, Inc. The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: [PATCH v3 4/5] soc: qcom: Driver for the Qualcomm RPM over SMD
On Mon, Jul 27, 2015 at 08:20:32PM -0700, Bjorn Andersson wrote: Driver for the Resource Power Manager (RPM) found in Qualcomm 8974 based devices. The driver exposes resources that child drivers can operate on; to implementing regulator, clock and bus frequency drivers. Signed-off-by: Bjorn Andersson bjorn.anders...@sonymobile.com --- Applied, thanks! -- Qualcomm Innovation Center, Inc. The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project -- To unsubscribe from this list: send the line unsubscribe linux-kernel in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
[PATCH v3 4/5] soc: qcom: Driver for the Qualcomm RPM over SMD
Driver for the Resource Power Manager (RPM) found in Qualcomm 8974 based
devices.
The driver exposes resources that child drivers can operate on; to
implementing regulator, clock and bus frequency drivers.
Signed-off-by: Bjorn Andersson
---
Changes since v2:
- Updated error handling path in RPM driver
- Moved to arch_initcall
- Moved from mfd
drivers/soc/qcom/Kconfig | 14 +++
drivers/soc/qcom/Makefile| 1 +
drivers/soc/qcom/smd-rpm.c | 244 +++
include/linux/soc/qcom/smd-rpm.h | 35 ++
4 files changed, 294 insertions(+)
create mode 100644 drivers/soc/qcom/smd-rpm.c
create mode 100644 include/linux/soc/qcom/smd-rpm.h
diff --git a/drivers/soc/qcom/Kconfig b/drivers/soc/qcom/Kconfig
index 5c1a067b6677..65181d5d7574 100644
--- a/drivers/soc/qcom/Kconfig
+++ b/drivers/soc/qcom/Kconfig
@@ -26,6 +26,20 @@ config QCOM_SMD
providing communication channels to remote processors in Qualcomm
platforms.
+config QCOM_SMD_RPM
+ tristate "Qualcomm Resource Power Manager (RPM) over SMD"
+ depends on QCOM_SMD && OF
+ help
+ If you say yes to this option, support will be included for the
+ Resource Power Manager system found in the Qualcomm 8974 based
+ devices.
+
+ This is required to access many regulators, clocks and bus
+ frequencies controlled by the RPM on these devices.
+
+ Say M here if you want to include support for the Qualcomm RPM as a
+ module. This will build a module called "qcom-smd-rpm".
+
config QCOM_SMEM
tristate "Qualcomm Shared Memory Manager (SMEM)"
depends on ARCH_QCOM
diff --git a/drivers/soc/qcom/Makefile b/drivers/soc/qcom/Makefile
index f961a8796ed2..10a93d168e0e 100644
--- a/drivers/soc/qcom/Makefile
+++ b/drivers/soc/qcom/Makefile
@@ -1,4 +1,5 @@
obj-$(CONFIG_QCOM_GSBI)+= qcom_gsbi.o
obj-$(CONFIG_QCOM_PM) += spm.o
obj-$(CONFIG_QCOM_SMD) += smd.o
+obj-$(CONFIG_QCOM_SMD_RPM) += smd-rpm.o
obj-$(CONFIG_QCOM_SMEM) += smem.o
diff --git a/drivers/soc/qcom/smd-rpm.c b/drivers/soc/qcom/smd-rpm.c
new file mode 100644
index ..1392ccf14a20
--- /dev/null
+++ b/drivers/soc/qcom/smd-rpm.c
@@ -0,0 +1,244 @@
+/*
+ * Copyright (c) 2015, Sony Mobile Communications AB.
+ * Copyright (c) 2012-2013, The Linux Foundation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include
+#include
+#include
+#include
+#include
+
+#include
+#include
+
+#define RPM_REQUEST_TIMEOUT (5 * HZ)
+
+/**
+ * struct qcom_smd_rpm - state of the rpm device driver
+ * @rpm_channel: reference to the smd channel
+ * @ack: completion for acks
+ * @lock: mutual exclusion around the send/complete pair
+ * @ack_status:result of the rpm request
+ */
+struct qcom_smd_rpm {
+ struct qcom_smd_channel *rpm_channel;
+
+ struct completion ack;
+ struct mutex lock;
+ int ack_status;
+};
+
+/**
+ * struct qcom_rpm_header - header for all rpm requests and responses
+ * @service_type: identifier of the service
+ * @length:length of the payload
+ */
+struct qcom_rpm_header {
+ u32 service_type;
+ u32 length;
+};
+
+/**
+ * struct qcom_rpm_request - request message to the rpm
+ * @msg_id:identifier of the outgoing message
+ * @flags: active/sleep state flags
+ * @type: resource type
+ * @id:resource id
+ * @data_len: length of the payload following this header
+ */
+struct qcom_rpm_request {
+ u32 msg_id;
+ u32 flags;
+ u32 type;
+ u32 id;
+ u32 data_len;
+};
+
+/**
+ * struct qcom_rpm_message - response message from the rpm
+ * @msg_type: indicator of the type of message
+ * @length:the size of this message, including the message header
+ * @msg_id:message id
+ * @message: textual message from the rpm
+ *
+ * Multiple of these messages can be stacked in an rpm message.
+ */
+struct qcom_rpm_message {
+ u32 msg_type;
+ u32 length;
+ union {
+ u32 msg_id;
+ u8 message[0];
+ };
+};
+
+#define RPM_SERVICE_TYPE_REQUEST 0x00716572 /* "req\0" */
+
+#define RPM_MSG_TYPE_ERR 0x00727265 /* "err\0" */
+#define RPM_MSG_TYPE_MSG_ID0x2367736d /* "msg#" */
+
+/**
+ * qcom_rpm_smd_write - write @buf to @type:@id
+ * @rpm: rpm handle
+ * @type: resource type
+ * @id:resource identifier
+ * @buf: the data to be
[PATCH v3 4/5] soc: qcom: Driver for the Qualcomm RPM over SMD
Driver for the Resource Power Manager (RPM) found in Qualcomm 8974 based
devices.
The driver exposes resources that child drivers can operate on; to
implementing regulator, clock and bus frequency drivers.
Signed-off-by: Bjorn Andersson bjorn.anders...@sonymobile.com
---
Changes since v2:
- Updated error handling path in RPM driver
- Moved to arch_initcall
- Moved from mfd
drivers/soc/qcom/Kconfig | 14 +++
drivers/soc/qcom/Makefile| 1 +
drivers/soc/qcom/smd-rpm.c | 244 +++
include/linux/soc/qcom/smd-rpm.h | 35 ++
4 files changed, 294 insertions(+)
create mode 100644 drivers/soc/qcom/smd-rpm.c
create mode 100644 include/linux/soc/qcom/smd-rpm.h
diff --git a/drivers/soc/qcom/Kconfig b/drivers/soc/qcom/Kconfig
index 5c1a067b6677..65181d5d7574 100644
--- a/drivers/soc/qcom/Kconfig
+++ b/drivers/soc/qcom/Kconfig
@@ -26,6 +26,20 @@ config QCOM_SMD
providing communication channels to remote processors in Qualcomm
platforms.
+config QCOM_SMD_RPM
+ tristate Qualcomm Resource Power Manager (RPM) over SMD
+ depends on QCOM_SMD OF
+ help
+ If you say yes to this option, support will be included for the
+ Resource Power Manager system found in the Qualcomm 8974 based
+ devices.
+
+ This is required to access many regulators, clocks and bus
+ frequencies controlled by the RPM on these devices.
+
+ Say M here if you want to include support for the Qualcomm RPM as a
+ module. This will build a module called qcom-smd-rpm.
+
config QCOM_SMEM
tristate Qualcomm Shared Memory Manager (SMEM)
depends on ARCH_QCOM
diff --git a/drivers/soc/qcom/Makefile b/drivers/soc/qcom/Makefile
index f961a8796ed2..10a93d168e0e 100644
--- a/drivers/soc/qcom/Makefile
+++ b/drivers/soc/qcom/Makefile
@@ -1,4 +1,5 @@
obj-$(CONFIG_QCOM_GSBI)+= qcom_gsbi.o
obj-$(CONFIG_QCOM_PM) += spm.o
obj-$(CONFIG_QCOM_SMD) += smd.o
+obj-$(CONFIG_QCOM_SMD_RPM) += smd-rpm.o
obj-$(CONFIG_QCOM_SMEM) += smem.o
diff --git a/drivers/soc/qcom/smd-rpm.c b/drivers/soc/qcom/smd-rpm.c
new file mode 100644
index ..1392ccf14a20
--- /dev/null
+++ b/drivers/soc/qcom/smd-rpm.c
@@ -0,0 +1,244 @@
+/*
+ * Copyright (c) 2015, Sony Mobile Communications AB.
+ * Copyright (c) 2012-2013, The Linux Foundation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include linux/module.h
+#include linux/platform_device.h
+#include linux/of_platform.h
+#include linux/io.h
+#include linux/interrupt.h
+
+#include linux/soc/qcom/smd.h
+#include linux/soc/qcom/smd-rpm.h
+
+#define RPM_REQUEST_TIMEOUT (5 * HZ)
+
+/**
+ * struct qcom_smd_rpm - state of the rpm device driver
+ * @rpm_channel: reference to the smd channel
+ * @ack: completion for acks
+ * @lock: mutual exclusion around the send/complete pair
+ * @ack_status:result of the rpm request
+ */
+struct qcom_smd_rpm {
+ struct qcom_smd_channel *rpm_channel;
+
+ struct completion ack;
+ struct mutex lock;
+ int ack_status;
+};
+
+/**
+ * struct qcom_rpm_header - header for all rpm requests and responses
+ * @service_type: identifier of the service
+ * @length:length of the payload
+ */
+struct qcom_rpm_header {
+ u32 service_type;
+ u32 length;
+};
+
+/**
+ * struct qcom_rpm_request - request message to the rpm
+ * @msg_id:identifier of the outgoing message
+ * @flags: active/sleep state flags
+ * @type: resource type
+ * @id:resource id
+ * @data_len: length of the payload following this header
+ */
+struct qcom_rpm_request {
+ u32 msg_id;
+ u32 flags;
+ u32 type;
+ u32 id;
+ u32 data_len;
+};
+
+/**
+ * struct qcom_rpm_message - response message from the rpm
+ * @msg_type: indicator of the type of message
+ * @length:the size of this message, including the message header
+ * @msg_id:message id
+ * @message: textual message from the rpm
+ *
+ * Multiple of these messages can be stacked in an rpm message.
+ */
+struct qcom_rpm_message {
+ u32 msg_type;
+ u32 length;
+ union {
+ u32 msg_id;
+ u8 message[0];
+ };
+};
+
+#define RPM_SERVICE_TYPE_REQUEST 0x00716572 /* req\0 */
+
+#define RPM_MSG_TYPE_ERR 0x00727265 /* err\0 */
+#define RPM_MSG_TYPE_MSG_ID0x2367736d /* msg# */
+
+/**
+ * qcom_rpm_smd_write - write @buf to
