From e4f5073d53be6cec0c654fac98372047efb66947 Mon Sep 17 00:00:00 2001 From: M Chetan Kumar Date: Thu, 8 Jun 2023 15:38:03 +0530 Subject: net: wwan: iosm: enable runtime pm support for 7560 Adds runtime pm support for 7560. As part of probe procedure auto suspend is enabled and auto suspend delay is set to 5000 ms for runtime pm use. Later auto flag is set to power manage the device at run time. On successful communication establishment between host and device the device usage counter is dropped and request to put the device into sleep state (suspend). In TX path, the device usage counter is raised and device is moved out of sleep(resume) for data transmission. In RX path, if the device has some data to be sent it request host platform to change the power state by giving PCI PME message. Signed-off-by: M Chetan Kumar Signed-off-by: David S. Miller --- drivers/net/wwan/iosm/iosm_ipc_port.c | 17 ++++++++++++++++- 1 file changed, 16 insertions(+), 1 deletion(-) (limited to 'drivers/net/wwan/iosm/iosm_ipc_port.c') diff --git a/drivers/net/wwan/iosm/iosm_ipc_port.c b/drivers/net/wwan/iosm/iosm_ipc_port.c index 5d5b4183e14a..2ba1ddca3945 100644 --- a/drivers/net/wwan/iosm/iosm_ipc_port.c +++ b/drivers/net/wwan/iosm/iosm_ipc_port.c @@ -3,6 +3,8 @@ * Copyright (C) 2020-21 Intel Corporation. */ +#include + #include "iosm_ipc_chnl_cfg.h" #include "iosm_ipc_imem_ops.h" #include "iosm_ipc_port.h" @@ -13,12 +15,16 @@ static int ipc_port_ctrl_start(struct wwan_port *port) struct iosm_cdev *ipc_port = wwan_port_get_drvdata(port); int ret = 0; + pm_runtime_get_sync(ipc_port->ipc_imem->dev); ipc_port->channel = ipc_imem_sys_port_open(ipc_port->ipc_imem, ipc_port->chl_id, IPC_HP_CDEV_OPEN); if (!ipc_port->channel) ret = -EIO; + pm_runtime_mark_last_busy(ipc_port->ipc_imem->dev); + pm_runtime_put_autosuspend(ipc_port->ipc_imem->dev); + return ret; } @@ -27,15 +33,24 @@ static void ipc_port_ctrl_stop(struct wwan_port *port) { struct iosm_cdev *ipc_port = wwan_port_get_drvdata(port); + pm_runtime_get_sync(ipc_port->ipc_imem->dev); ipc_imem_sys_port_close(ipc_port->ipc_imem, ipc_port->channel); + pm_runtime_mark_last_busy(ipc_port->ipc_imem->dev); + pm_runtime_put_autosuspend(ipc_port->ipc_imem->dev); } /* transfer control data to modem */ static int ipc_port_ctrl_tx(struct wwan_port *port, struct sk_buff *skb) { struct iosm_cdev *ipc_port = wwan_port_get_drvdata(port); + int ret; - return ipc_imem_sys_cdev_write(ipc_port, skb); + pm_runtime_get_sync(ipc_port->ipc_imem->dev); + ret = ipc_imem_sys_cdev_write(ipc_port, skb); + pm_runtime_mark_last_busy(ipc_port->ipc_imem->dev); + pm_runtime_put_autosuspend(ipc_port->ipc_imem->dev); + + return ret; } static const struct wwan_port_ops ipc_wwan_ctrl_ops = { -- cgit v1.2.3