From: Stanley Chu <yschu@nuvoton.com>
Date: Thu, 6 Mar 2025 07:54:26 +0000 (+0800)
Subject: i3c: master: svc: Add support for Nuvoton npcm845 i3c
X-Git-Tag: v6.15-rc1~72^2~10
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=98d87600a04e42282797631aa6b98dd43999e274;p=thirdparty%2Fkernel%2Fstable.git

i3c: master: svc: Add support for Nuvoton npcm845 i3c

Nuvoton npcm845 SoC uses an older IP version, which has specific
hardware issues that need to be addressed with a different compatible
string.

Add driver data for different compatible strings to define platform
specific quirks.
Add compatible string for npcm845 to define its own driver data.

Signed-off-by: Stanley Chu <yschu@nuvoton.com>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Link: https://lore.kernel.org/r/20250306075429.2265183-3-yschu@nuvoton.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
---

diff --git a/drivers/i3c/master/svc-i3c-master.c b/drivers/i3c/master/svc-i3c-master.c
index 98f800f999691..c0299e3f2cf85 100644
--- a/drivers/i3c/master/svc-i3c-master.c
+++ b/drivers/i3c/master/svc-i3c-master.c
@@ -158,6 +158,10 @@ struct svc_i3c_regs_save {
 	u32 mdynaddr;
 };
 
+struct svc_i3c_drvdata {
+	u32 quirks;
+};
+
 /**
  * struct svc_i3c_master - Silvaco I3C Master structure
  * @base: I3C master controller
@@ -183,6 +187,7 @@ struct svc_i3c_regs_save {
  * @ibi.tbq_slot: To be queued IBI slot
  * @ibi.lock: IBI lock
  * @lock: Transfer lock, protect between IBI work thread and callbacks from master
+ * @drvdata: Driver data
  * @enabled_events: Bit masks for enable events (IBI, HotJoin).
  * @mctrl_config: Configuration value in SVC_I3C_MCTRL for setting speed back.
  */
@@ -214,6 +219,7 @@ struct svc_i3c_master {
 		spinlock_t lock;
 	} ibi;
 	struct mutex lock;
+	const struct svc_i3c_drvdata *drvdata;
 	u32 enabled_events;
 	u32 mctrl_config;
 };
@@ -1819,6 +1825,10 @@ static int svc_i3c_master_probe(struct platform_device *pdev)
 	if (!master)
 		return -ENOMEM;
 
+	master->drvdata = of_device_get_match_data(dev);
+	if (!master->drvdata)
+		return -EINVAL;
+
 	master->regs = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(master->regs))
 		return PTR_ERR(master->regs);
@@ -1960,8 +1970,13 @@ static const struct dev_pm_ops svc_i3c_pm_ops = {
 			   svc_i3c_runtime_resume, NULL)
 };
 
+static const struct svc_i3c_drvdata npcm845_drvdata = {};
+
+static const struct svc_i3c_drvdata svc_default_drvdata = {};
+
 static const struct of_device_id svc_i3c_master_of_match_tbl[] = {
-	{ .compatible = "silvaco,i3c-master-v1"},
+	{ .compatible = "nuvoton,npcm845-i3c", .data = &npcm845_drvdata },
+	{ .compatible = "silvaco,i3c-master-v1", .data = &svc_default_drvdata },
 	{ /* sentinel */ },
 };
 MODULE_DEVICE_TABLE(of, svc_i3c_master_of_match_tbl);