Merge tag 'soc-drivers-6.6' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc

Pull ARM SoC driver updates from Arnd Bergmann:
 "The main change this time was the introduction of the drivers/genpd
  subsystem that gets split out from drivers/soc to keep common
  functionality together.

  The SCMI driver subsystem gets an update to version 3.2 of the
  specification. There are also updates to memory, reset and other
  firmware drivers.

  On the soc driver side, the updates are mostly cleanups across a
  number of Arm platforms. On driver for loongarch adds power management
  for DT based systems, another driver is for HiSilicon's Arm server
  chips with their HCCS system health interface.

  The remaining updates for the most part add support for additional
  hardware in existing drivers or contain minor cleanups. Most of these
  are for the Qualcomm Snapdragon platform"

* tag 'soc-drivers-6.6' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (136 commits)
  bus: fsl-mc: Use common ranges functions
  soc: kunpeng_hccs: fix some sparse warnings about incorrect type
  soc: loongson2_pm: add power management support
  soc: dt-bindings: add loongson-2 pm
  soc: rockchip: grf: Fix SDMMC not working on RK3588 with bus-width > 1
  genpd: rockchip: Add PD_VO entry for rv1126
  bus: ti-sysc: Fix cast to enum warning
  soc: kunpeng_hccs: add MAILBOX dependency
  MAINTAINERS: remove OXNAS entry
  dt-bindings: interrupt-controller: arm,versatile-fpga-irq: mark oxnas compatible as deprecated
  irqchip: irq-versatile-fpga: remove obsolete oxnas compatible
  soc: qcom: aoss: Tidy up qmp_send() callers
  soc: qcom: aoss: Format string in qmp_send()
  soc: qcom: aoss: Move length requirements from caller
  soc: kunpeng_hccs: fix size_t format string
  soc: ti: k3-socinfo.c: Add JTAG ID for AM62PX
  dt-bindings: firmware: qcom: scm: Updating VMID list
  firmware: imx: scu-irq: support identifying SCU wakeup source from sysfs
  firmware: imx: scu-irq: enlarge the IMX_SC_IRQ_NUM_GROUP
  firmware: imx: scu-irq: add imx_scu_irq_get_status
  ...

3 files changed, 125 insertions, 22 deletions

diff --git a/drivers/firmware/imx/imx-scu-irq.c b/drivers/firmware/imx/imx-scu-irq.c
index d9dcc20945c6..7cc0dec04587 100644
--- a/drivers/firmware/imx/imx-scu-irq.c
+++ b/drivers/firmware/imx/imx-scu-irq.c
@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0+
 /*
- * Copyright 2019 NXP
+ * Copyright 2019,2023 NXP
  *
  * Implementation of the SCU IRQ functions using MU.
  *
@@ -9,12 +9,14 @@
 #include <dt-bindings/firmware/imx/rsrc.h>
 #include <linux/firmware/imx/ipc.h>
 #include <linux/firmware/imx/sci.h>
+#include <linux/kobject.h>
 #include <linux/mailbox_client.h>
 #include <linux/suspend.h>
+#include <linux/sysfs.h>
 
 #define IMX_SC_IRQ_FUNC_ENABLE	1
 #define IMX_SC_IRQ_FUNC_STATUS	2
-#define IMX_SC_IRQ_NUM_GROUP	4
+#define IMX_SC_IRQ_NUM_GROUP	9
 
 static u32 mu_resource_id;
 
@@ -40,63 +42,102 @@ struct imx_sc_msg_irq_enable {
 	u8 enable;
 } __packed;
 
+struct scu_wakeup {
+	u32 mask;
+	u32 wakeup_src;
+	bool valid;
+};
+
+/* Sysfs functions */
+static struct kobject *wakeup_obj;
+static ssize_t wakeup_source_show(struct kobject *kobj, struct kobj_attribute *attr, char *buf);
+static struct kobj_attribute wakeup_source_attr =
+		__ATTR(wakeup_src, 0660, wakeup_source_show, NULL);
+
+static struct scu_wakeup scu_irq_wakeup[IMX_SC_IRQ_NUM_GROUP];
+
 static struct imx_sc_ipc *imx_sc_irq_ipc_handle;
 static struct work_struct imx_sc_irq_work;
-static ATOMIC_NOTIFIER_HEAD(imx_scu_irq_notifier_chain);
+static BLOCKING_NOTIFIER_HEAD(imx_scu_irq_notifier_chain);
 
 int imx_scu_irq_register_notifier(struct notifier_block *nb)
 {
-	return atomic_notifier_chain_register(
+	return blocking_notifier_chain_register(
 		&imx_scu_irq_notifier_chain, nb);
 }
 EXPORT_SYMBOL(imx_scu_irq_register_notifier);
 
 int imx_scu_irq_unregister_notifier(struct notifier_block *nb)
 {
-	return atomic_notifier_chain_unregister(
+	return blocking_notifier_chain_unregister(
 		&imx_scu_irq_notifier_chain, nb);
 }
 EXPORT_SYMBOL(imx_scu_irq_unregister_notifier);
 
 static int imx_scu_irq_notifier_call_chain(unsigned long status, u8 *group)
 {
-	return atomic_notifier_call_chain(&imx_scu_irq_notifier_chain,
+	return blocking_notifier_call_chain(&imx_scu_irq_notifier_chain,
 		status, (void *)group);
 }
 
 static void imx_scu_irq_work_handler(struct work_struct *work)
 {
-	struct imx_sc_msg_irq_get_status msg;
-	struct imx_sc_rpc_msg *hdr = &msg.hdr;
 	u32 irq_status;
 	int ret;
 	u8 i;
 
 	for (i = 0; i < IMX_SC_IRQ_NUM_GROUP; i++) {
-		hdr->ver = IMX_SC_RPC_VERSION;
-		hdr->svc = IMX_SC_RPC_SVC_IRQ;
-		hdr->func = IMX_SC_IRQ_FUNC_STATUS;
-		hdr->size = 2;
-
-		msg.data.req.resource = mu_resource_id;
-		msg.data.req.group = i;
+		if (scu_irq_wakeup[i].mask) {
+			scu_irq_wakeup[i].valid = false;
+			scu_irq_wakeup[i].wakeup_src = 0;
+		}
 
-		ret = imx_scu_call_rpc(imx_sc_irq_ipc_handle, &msg, true);
+		ret = imx_scu_irq_get_status(i, &irq_status);
 		if (ret) {
 			pr_err("get irq group %d status failed, ret %d\n",
 			       i, ret);
 			return;
 		}
 
-		irq_status = msg.data.resp.status;
 		if (!irq_status)
 			continue;
+		if (scu_irq_wakeup[i].mask & irq_status) {
+			scu_irq_wakeup[i].valid = true;
+			scu_irq_wakeup[i].wakeup_src = irq_status & scu_irq_wakeup[i].mask;
+		} else {
+			scu_irq_wakeup[i].wakeup_src = irq_status;
+		}
 
 		pm_system_wakeup();
 		imx_scu_irq_notifier_call_chain(irq_status, &i);
 	}
 }
 
+int imx_scu_irq_get_status(u8 group, u32 *irq_status)
+{
+	struct imx_sc_msg_irq_get_status msg;
+	struct imx_sc_rpc_msg *hdr = &msg.hdr;
+	int ret;
+
+	hdr->ver = IMX_SC_RPC_VERSION;
+	hdr->svc = IMX_SC_RPC_SVC_IRQ;
+	hdr->func = IMX_SC_IRQ_FUNC_STATUS;
+	hdr->size = 2;
+
+	msg.data.req.resource = mu_resource_id;
+	msg.data.req.group = group;
+
+	ret = imx_scu_call_rpc(imx_sc_irq_ipc_handle, &msg, true);
+	if (ret)
+		return ret;
+
+	if (irq_status)
+		*irq_status = msg.data.resp.status;
+
+	return 0;
+}
+EXPORT_SYMBOL(imx_scu_irq_get_status);
+
 int imx_scu_irq_group_enable(u8 group, u32 mask, u8 enable)
 {
 	struct imx_sc_msg_irq_enable msg;
@@ -121,6 +162,11 @@ int imx_scu_irq_group_enable(u8 group, u32 mask, u8 enable)
 		pr_err("enable irq failed, group %d, mask %d, ret %d\n",
 			group, mask, ret);
 
+	if (enable)
+		scu_irq_wakeup[group].mask |= mask;
+	else
+		scu_irq_wakeup[group].mask &= ~mask;
+
 	return ret;
 }
 EXPORT_SYMBOL(imx_scu_irq_group_enable);
@@ -130,6 +176,25 @@ static void imx_scu_irq_callback(struct mbox_client *c, void *msg)
 	schedule_work(&imx_sc_irq_work);
 }
 
+static ssize_t wakeup_source_show(struct kobject *kobj, struct kobj_attribute *attr, char *buf)
+{
+	int i;
+
+	for (i = 0; i < IMX_SC_IRQ_NUM_GROUP; i++) {
+		if (!scu_irq_wakeup[i].wakeup_src)
+			continue;
+
+		if (scu_irq_wakeup[i].valid)
+			sprintf(buf, "Wakeup source group = %d, irq = 0x%x\n",
+				i, scu_irq_wakeup[i].wakeup_src);
+		else
+			sprintf(buf, "Spurious SCU wakeup, group = %d, irq = 0x%x\n",
+				i, scu_irq_wakeup[i].wakeup_src);
+	}
+
+	return strlen(buf);
+}
+
 int imx_scu_enable_general_irq_channel(struct device *dev)
 {
 	struct of_phandle_args spec;
@@ -169,6 +234,25 @@ int imx_scu_enable_general_irq_channel(struct device *dev)
 
 	mu_resource_id = IMX_SC_R_MU_0A + i;
 
+	/* Create directory under /sysfs/firmware */
+	wakeup_obj = kobject_create_and_add("scu_wakeup_source", firmware_kobj);
+	if (!wakeup_obj) {
+		ret = -ENOMEM;
+		goto free_ch;
+	}
+
+	ret = sysfs_create_file(wakeup_obj, &wakeup_source_attr.attr);
+	if (ret) {
+		dev_err(dev, "Cannot create wakeup source src file......\n");
+		kobject_put(wakeup_obj);
+		goto free_ch;
+	}
+
+	return 0;
+
+free_ch:
+	mbox_free_channel(ch);
+
 	return ret;
 }
 EXPORT_SYMBOL(imx_scu_enable_general_irq_channel);
diff --git a/drivers/firmware/imx/imx-scu-soc.c b/drivers/firmware/imx/imx-scu-soc.c
index 2f32353de2c9..497192320562 100644
--- a/drivers/firmware/imx/imx-scu-soc.c
+++ b/drivers/firmware/imx/imx-scu-soc.c
@@ -78,6 +78,22 @@ static int imx_scu_soc_id(void)
 	return msg.data.resp.id;
 }
 
+static const char *imx_scu_soc_name(u32 id)
+{
+	switch (id) {
+	case 0x1:
+		return "i.MX8QM";
+	case 0x2:
+		return "i.MX8QXP";
+	case 0xe:
+		return "i.MX8DXL";
+	default:
+		break;
+	}
+
+	return "NULL";
+}
+
 int imx_scu_soc_init(struct device *dev)
 {
 	struct soc_device_attribute *soc_dev_attr;
@@ -113,9 +129,7 @@ int imx_scu_soc_init(struct device *dev)
 
 	/* format soc_id value passed from SCU firmware */
 	val = id & 0x1f;
-	soc_dev_attr->soc_id = devm_kasprintf(dev, GFP_KERNEL, "0x%x", val);
-	if (!soc_dev_attr->soc_id)
-		return -ENOMEM;
+	soc_dev_attr->soc_id = imx_scu_soc_name(val);
 
 	/* format revision value passed from SCU firmware */
 	val = (id >> 5) & 0xf;
diff --git a/drivers/firmware/imx/imx-scu.c b/drivers/firmware/imx/imx-scu.c
index 47db49911e7b..14ff9d3504bf 100644
--- a/drivers/firmware/imx/imx-scu.c
+++ b/drivers/firmware/imx/imx-scu.c
@@ -20,7 +20,7 @@
 #include <linux/platform_device.h>
 
 #define SCU_MU_CHAN_NUM		8
-#define MAX_RX_TIMEOUT		(msecs_to_jiffies(30))
+#define MAX_RX_TIMEOUT		(msecs_to_jiffies(3000))
 
 struct imx_sc_chan {
 	struct imx_sc_ipc *sc_ipc;
@@ -353,7 +353,12 @@ static struct platform_driver imx_scu_driver = {
 	},
 	.probe = imx_scu_probe,
 };
-builtin_platform_driver(imx_scu_driver);
+
+static int __init imx_scu_driver_init(void)
+{
+	return platform_driver_register(&imx_scu_driver);
+}
+subsys_initcall_sync(imx_scu_driver_init);
 
 MODULE_AUTHOR("Dong Aisheng <aisheng.dong@nxp.com>");
 MODULE_DESCRIPTION("IMX SCU firmware protocol driver");