interconnect: imx: configure NoC mode/prioriry/ext_control

Introduce imx_icc_noc_setting structure to describe a master port setting
Pass imx_icc_noc_setting as a parameter from specific driver
Set priority level, mode, ext control in imx_icc_node_set

Signed-off-by: Peng Fan <peng.fan@nxp.com>
Link: https://lore.kernel.org/r/20220703091132.1412063-8-peng.fan@oss.nxp.com
Signed-off-by: Georgi Djakov <djakov@kernel.org>

drivers/interconnect/imx/imx.c

@@ -10,6 +10,7 @@
 
 #include <linux/device.h>
 #include <linux/interconnect-provider.h>
+#include <linux/io.h>
 #include <linux/module.h>
 #include <linux/of.h>
 #include <linux/of_platform.h>
@@ -21,8 +22,10 @@
 /* private icc_node data */
 struct imx_icc_node {
 	const struct imx_icc_node_desc *desc;
+	const struct imx_icc_noc_setting *setting;
 	struct device *qos_dev;
 	struct dev_pm_qos_request qos_req;
+	struct imx_icc_provider *imx_provider;
 };
 
 static int imx_icc_get_bw(struct icc_node *node, u32 *avg, u32 *peak)
@@ -37,8 +40,30 @@ static int imx_icc_node_set(struct icc_node *node)
 {
 	struct device *dev = node->provider->dev;
 	struct imx_icc_node *node_data = node->data;
+	void __iomem *base;
+	u32 prio;
 	u64 freq;
 
+	if (node_data->setting && node->peak_bw) {
+		base = node_data->setting->reg + node_data->imx_provider->noc_base;
+		if (node_data->setting->mode == IMX_NOC_MODE_FIXED) {
+			prio = node_data->setting->prio_level;
+			prio = PRIORITY_COMP_MARK | (prio << 8) | prio;
+			writel(prio, base + IMX_NOC_PRIO_REG);
+			writel(node_data->setting->mode, base + IMX_NOC_MODE_REG);
+			writel(node_data->setting->ext_control, base + IMX_NOC_EXT_CTL_REG);
+			dev_dbg(dev, "%s: mode: 0x%x, prio: 0x%x, ext_control: 0x%x\n",
+				node_data->desc->name, node_data->setting->mode, prio,
+				node_data->setting->ext_control);
+		} else if (node_data->setting->mode == IMX_NOC_MODE_UNCONFIGURED) {
+			dev_dbg(dev, "%s: mode not unconfigured\n", node_data->desc->name);
+		} else {
+			dev_info(dev, "%s: mode: %d not supported\n",
+				 node_data->desc->name, node_data->setting->mode);
+			return -EOPNOTSUPP;
+		}
+	}
+
 	if (!node_data->qos_dev)
 		return 0;
 
@@ -135,7 +160,8 @@ static int imx_icc_node_init_qos(struct icc_provider *provider,
 }
 
 static struct icc_node *imx_icc_node_add(struct imx_icc_provider *imx_provider,
-					 const struct imx_icc_node_desc *node_desc)
+					 const struct imx_icc_node_desc *node_desc,
+					 const struct imx_icc_noc_setting *setting)
 {
 	struct icc_provider *provider = &imx_provider->provider;
 	struct device *dev = provider->dev;
@@ -164,6 +190,8 @@ static struct icc_node *imx_icc_node_add(struct imx_icc_provider *imx_provider,
 	node->name = node_desc->name;
 	node->data = node_data;
 	node_data->desc = node_desc;
+	node_data->setting = setting;
+	node_data->imx_provider = imx_provider;
 	icc_node_add(node, provider);
 
 	if (node_desc->adj) {
@@ -187,7 +215,8 @@ static void imx_icc_unregister_nodes(struct icc_provider *provider)
 
 static int imx_icc_register_nodes(struct imx_icc_provider *imx_provider,
 				  const struct imx_icc_node_desc *descs,
-				  int count)
+				  int count,
+				  const struct imx_icc_noc_setting *settings)
 {
 	struct icc_provider *provider = &imx_provider->provider;
 	struct icc_onecell_data *provider_data = provider->data;
@@ -199,7 +228,8 @@ static int imx_icc_register_nodes(struct imx_icc_provider *imx_provider,
 		const struct imx_icc_node_desc *node_desc = &descs[i];
 		size_t j;
 
-		node = imx_icc_node_add(imx_provider, node_desc);
+		node = imx_icc_node_add(imx_provider, node_desc,
+					settings ? &settings[node_desc->id] : NULL);
 		if (IS_ERR(node)) {
 			ret = dev_err_probe(provider->dev, PTR_ERR(node),
 					    "failed to add %s\n", node_desc->name);
@@ -237,7 +267,8 @@ static int get_max_node_id(struct imx_icc_node_desc *nodes, int nodes_count)
 }
 
 int imx_icc_register(struct platform_device *pdev,
-		     struct imx_icc_node_desc *nodes, int nodes_count)
+		     struct imx_icc_node_desc *nodes, int nodes_count,
+		     struct imx_icc_noc_setting *settings)
 {
 	struct device *dev = &pdev->dev;
 	struct icc_onecell_data *data;
@@ -266,13 +297,22 @@ int imx_icc_register(struct platform_device *pdev,
 	provider->dev = dev->parent;
 	platform_set_drvdata(pdev, imx_provider);
 
+	if (settings) {
+		imx_provider->noc_base = devm_of_iomap(dev, provider->dev->of_node, 0, NULL);
+		if (IS_ERR(imx_provider->noc_base)) {
+			ret = PTR_ERR(imx_provider->noc_base);
+			dev_err(dev, "Error mapping NoC: %d\n", ret);
+			return ret;
+		}
+	}
+
 	ret = icc_provider_add(provider);
 	if (ret) {
 		dev_err(dev, "error adding interconnect provider: %d\n", ret);
 		return ret;
 	}
 
-	ret = imx_icc_register_nodes(imx_provider, nodes, nodes_count);
+	ret = imx_icc_register_nodes(imx_provider, nodes, nodes_count, settings);
 	if (ret)
 		goto provider_del;
 

drivers/interconnect/imx/imx.h

@@ -15,6 +15,32 @@
 
 #define IMX_ICC_MAX_LINKS	4
 
+/*
+ * High throughput priority level in Regulator mode
+ * Read Priority in Fixed/Limiter mode
+ */
+#define PRIORITY0_SHIFT	0
+/*
+ * Low throughput priority level in Regulator mode
+ * Write Priority in Fixed/Limiter mode
+ */
+#define PRIORITY1_SHIFT	8
+#define PRIORITY_MASK		0x7
+
+#define PRIORITY_COMP_MARK	BIT(31)	/* Must set */
+
+#define IMX_NOC_MODE_FIXED		0
+#define IMX_NOC_MODE_LIMITER		1
+#define IMX_NOC_MODE_BYPASS		2
+#define IMX_NOC_MODE_REGULATOR		3
+#define IMX_NOC_MODE_UNCONFIGURED	0xFF
+
+#define IMX_NOC_PRIO_REG	0x8
+#define IMX_NOC_MODE_REG	0xC
+#define IMX_NOC_BANDWIDTH_REG	0x10
+#define IMX_NOC_SATURATION	0x14
+#define IMX_NOC_EXT_CTL_REG	0x18
+
 struct imx_icc_provider {
 	void __iomem *noc_base;
 	struct icc_provider provider;
@@ -44,6 +70,20 @@ struct imx_icc_node_desc {
 	const struct imx_icc_node_adj_desc *adj;
 };
 
+/*
+ * struct imx_icc_noc_setting - Describe an interconnect node setting
+ * @reg: register offset inside the NoC
+ * @prio_level: priority level
+ * @mode: functional mode
+ * @ext_control: external input control
+ */
+struct imx_icc_noc_setting {
+	u32 reg;
+	u32 prio_level;
+	u32 mode;
+	u32 ext_control;
+};
+
 #define DEFINE_BUS_INTERCONNECT(_name, _id, _adj, ...)			\
 	{								\
 		.id = _id,						\
@@ -61,7 +101,8 @@ struct imx_icc_node_desc {
 
 int imx_icc_register(struct platform_device *pdev,
 		     struct imx_icc_node_desc *nodes,
-		     int nodes_count);
+		     int nodes_count,
+		     struct imx_icc_noc_setting *noc_settings);
 int imx_icc_unregister(struct platform_device *pdev);
 
 #endif /* __DRIVERS_INTERCONNECT_IMX_H */

drivers/interconnect/imx/imx8mm.c

@@ -83,7 +83,7 @@ static struct imx_icc_node_desc nodes[] = {
 
 static int imx8mm_icc_probe(struct platform_device *pdev)
 {
-	return imx_icc_register(pdev, nodes, ARRAY_SIZE(nodes));
+	return imx_icc_register(pdev, nodes, ARRAY_SIZE(nodes), NULL);
 }
 
 static int imx8mm_icc_remove(struct platform_device *pdev)

drivers/interconnect/imx/imx8mn.c

@@ -72,7 +72,7 @@ static struct imx_icc_node_desc nodes[] = {
 
 static int imx8mn_icc_probe(struct platform_device *pdev)
 {
-	return imx_icc_register(pdev, nodes, ARRAY_SIZE(nodes));
+	return imx_icc_register(pdev, nodes, ARRAY_SIZE(nodes), NULL);
 }
 
 static int imx8mn_icc_remove(struct platform_device *pdev)

drivers/interconnect/imx/imx8mq.c

@@ -82,7 +82,7 @@ static struct imx_icc_node_desc nodes[] = {
 
 static int imx8mq_icc_probe(struct platform_device *pdev)
 {
-	return imx_icc_register(pdev, nodes, ARRAY_SIZE(nodes));
+	return imx_icc_register(pdev, nodes, ARRAY_SIZE(nodes), NULL);
 }
 
 static int imx8mq_icc_remove(struct platform_device *pdev)