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Mon, 10 Aug 2020 20:32:13 -0700 From: Ben Levinsky To: stefanos@xilinx.com, michals@xilinx.com Cc: devicetree@vger.kernel.org, mathieu.poirier@linaro.org, ed.mooring@xilinx.com, linux-remoteproc@vger.kernel.org, linux-kernel@vger.kernel.org, wendy.liang@xilinx.com, robh+dt@kernel.org, linux-arm-kernel@lists.infradead.org Subject: [PATCH v8 2/5] firmware: xilinx: Add shutdown/wakeup APIs Date: Mon, 10 Aug 2020 20:32:10 -0700 Message-Id: <20200811033213.20088-3-ben.levinsky@xilinx.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200811033213.20088-1-ben.levinsky@xilinx.com> References: <20200811033213.20088-1-ben.levinsky@xilinx.com> X-TM-AS-Product-Ver: IMSS-7.1.0.1224-8.2.0.1013-23620.005 X-TM-AS-User-Approved-Sender: Yes;Yes X-EOPAttributedMessage: 0 X-MS-Office365-Filtering-HT: Tenant X-MS-PublicTrafficType: Email MIME-Version: 1.0 X-MS-Office365-Filtering-Correlation-Id: 40123812-2e5b-4978-8a48-08d83da72827 X-MS-TrafficTypeDiagnostic: MW2PR02MB3884: X-Microsoft-Antispam-PRVS: X-Auto-Response-Suppress: DR, RN, NRN, OOF, AutoReply X-MS-Oob-TLC-OOBClassifiers: OLM:4125; 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Signed-off-by: Ben Levinsky --- v3: - add xilinx-related platform mgmt fn's instead of wrapping around function pointer in xilinx eemi ops struct - fix formatting v4: - add default values for enumv3: - add xilinx-related platform mgmt fn's instead of wrapping around function pointer in xilinx eemi ops struct - fix formatting v4: - add default values for enum --- drivers/firmware/xilinx/zynqmp.c | 35 ++++++++++++++++++++++++++++ include/linux/firmware/xlnx-zynqmp.h | 22 +++++++++++++++++ 2 files changed, 57 insertions(+) diff --git a/drivers/firmware/xilinx/zynqmp.c b/drivers/firmware/xilinx/zynqmp.c index 8d1ff2454e2e..f1a0bd35deeb 100644 --- a/drivers/firmware/xilinx/zynqmp.c +++ b/drivers/firmware/xilinx/zynqmp.c @@ -846,6 +846,41 @@ int zynqmp_pm_release_node(const u32 node) } EXPORT_SYMBOL_GPL(zynqmp_pm_release_node); +/** + * zynqmp_pm_force_powerdown - PM call to request for another PU or subsystem to + * be powered down forcefully + * @target: Node ID of the targeted PU or subsystem + * @ack: Flag to specify whether acknowledge is requested + * + * Return: status, either success or error+reason + */ +int zynqmp_pm_force_powerdown(const u32 target, + const enum zynqmp_pm_request_ack ack) +{ + return zynqmp_pm_invoke_fn(PM_FORCE_POWERDOWN, target, ack, 0, 0, NULL); +} +EXPORT_SYMBOL_GPL(zynqmp_pm_force_powerdown); + +/** + * zynqmp_pm_request_wakeup - PM call to wake up selected master or subsystem + * @node: Node ID of the master or subsystem + * @set_addr: Specifies whether the address argument is relevant + * @address: Address from which to resume when woken up + * @ack: Flag to specify whether acknowledge requested + * + * Return: status, either success or error+reason + */ +int zynqmp_pm_request_wakeup(const u32 node, + const bool set_addr, + const u64 address, + const enum zynqmp_pm_request_ack ack) +{ + /* set_addr flag is encoded into 1st bit of address */ + return zynqmp_pm_invoke_fn(PM_REQUEST_WAKEUP, node, address | set_addr, + address >> 32, ack, NULL); +} +EXPORT_SYMBOL_GPL(zynqmp_pm_request_wakeup); + /** * zynqmp_pm_set_requirement() - PM call to set requirement for PM slaves * @node: Node ID of the slave diff --git a/include/linux/firmware/xlnx-zynqmp.h b/include/linux/firmware/xlnx-zynqmp.h index bb347dfe4ba4..4d83a7d69c4c 100644 --- a/include/linux/firmware/xlnx-zynqmp.h +++ b/include/linux/firmware/xlnx-zynqmp.h @@ -64,6 +64,8 @@ enum pm_api_id { PM_GET_API_VERSION = 1, + PM_FORCE_POWERDOWN = 8, + PM_REQUEST_WAKEUP = 10, PM_SYSTEM_SHUTDOWN = 12, PM_REQUEST_NODE = 13, PM_RELEASE_NODE, @@ -376,6 +378,12 @@ int zynqmp_pm_write_pggs(u32 index, u32 value); int zynqmp_pm_read_pggs(u32 index, u32 *value); int zynqmp_pm_system_shutdown(const u32 type, const u32 subtype); int zynqmp_pm_set_boot_health_status(u32 value); +int zynqmp_pm_force_powerdown(const u32 target, + const enum zynqmp_pm_request_ack ack); +int zynqmp_pm_request_wakeup(const u32 node, + const bool set_addr, + const u64 address, + const enum zynqmp_pm_request_ack ack); #else static inline struct zynqmp_eemi_ops *zynqmp_pm_get_eemi_ops(void) { @@ -526,6 +534,20 @@ static inline int zynqmp_pm_set_boot_health_status(u32 value) { return -ENODEV; } + +static inline int zynqmp_pm_force_powerdown(const u32 target, + const enum zynqmp_pm_request_ack ack) +{ + return -ENODEV; +} + +static inline int zynqmp_pm_request_wakeup(const u32 node, + const bool set_addr, + const u64 address, + const enum zynqmp_pm_request_ack ack) +{ + return -ENODEV; +} #endif #endif /* __FIRMWARE_ZYNQMP_H__ */