linux-kernel - [PATCH v2 2/2] pinctrl: scmi: support i.MX OEM pin configuration type

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Date: Thu, 18 Apr 2024 10:53:18 +0800
From: "Peng Fan (OSS)" <peng.fan@....nxp.com>
To: Linus Walleij <linus.walleij@...aro.org>, Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Shawn Guo <shawnguo@...nel.org>, 
 Sascha Hauer <s.hauer@...gutronix.de>, 
 Pengutronix Kernel Team <kernel@...gutronix.de>, 
 Fabio Estevam <festevam@...il.com>, Peng Fan <peng.fan@....com>, 
 Sudeep Holla <sudeep.holla@....com>, 
 Cristian Marussi <cristian.marussi@....com>
Cc: linux-gpio@...r.kernel.org, devicetree@...r.kernel.org, 
 imx@...ts.linux.dev, linux-arm-kernel@...ts.infradead.org, 
 linux-kernel@...r.kernel.org, Peng Fan <peng.fan@....com>
Subject: [PATCH v2 2/2] pinctrl: scmi: support i.MX OEM pin configuration
 type

From: Peng Fan <peng.fan@....com>

i.MX95 System Manager FW supports SCMI PINCTRL protocol, but uses
OEM Pin Configuration type, so extend the driver to support custom
params.

Signed-off-by: Peng Fan <peng.fan@....com>
---
 drivers/pinctrl/pinctrl-scmi.c | 23 +++++++++++++++++++++++
 drivers/pinctrl/pinctrl-scmi.h | 15 +++++++++++++++
 2 files changed, 38 insertions(+)

diff --git a/drivers/pinctrl/pinctrl-scmi.c b/drivers/pinctrl/pinctrl-scmi.c
index 036bc1e3fc6c..d051fea0dbf5 100644
--- a/drivers/pinctrl/pinctrl-scmi.c
+++ b/drivers/pinctrl/pinctrl-scmi.c
@@ -21,6 +21,7 @@
 #include <linux/pinctrl/pinctrl.h>
 #include <linux/pinctrl/pinmux.h>
 
+#include "pinctrl-scmi.h"
 #include "pinctrl-utils.h"
 #include "core.h"
 #include "pinconf.h"
@@ -469,6 +470,23 @@ static const struct pinconf_ops pinctrl_scmi_pinconf_ops = {
 	.pin_config_config_dbg_show = pinconf_generic_dump_config,
 };
 
+static const struct pinconf_generic_params pinctrl_scmi_oem_dt_params[] = {
+	{"nxp,func-id", IMX_SCMI_PIN_MUX, -1},
+	{"nxp,daisy-id", IMX_SCMI_PIN_DAISY_ID, -1},
+	{"nxp,daisy-conf", IMX_SCMI_PIN_DAISY_CFG, -1},
+	{"nxp,pin-conf", IMX_SCMI_PIN_CONF, -1},
+};
+
+#ifdef CONFIG_DEBUG_FS
+static const
+struct pin_config_item pinctrl_scmi_oem_conf_items[ARRAY_SIZE(pinctrl_scmi_oem_dt_params)] = {
+	PCONFDUMP(IMX_SCMI_PIN_MUX, "FUNC-ID", NULL, true),
+	PCONFDUMP(IMX_SCMI_PIN_DAISY_ID, "DAISY-ID", NULL, true),
+	PCONFDUMP(IMX_SCMI_PIN_DAISY_CFG, "DAISY-CFG", NULL, true),
+	PCONFDUMP(IMX_SCMI_PIN_CONF, "PIN-CONF", NULL, true),
+};
+#endif
+
 static int pinctrl_scmi_get_pins(struct scmi_pinctrl *pmx,
 				 struct pinctrl_desc *desc)
 {
@@ -533,6 +551,11 @@ static int scmi_pinctrl_probe(struct scmi_device *sdev)
 	pmx->pctl_desc.pctlops = &pinctrl_scmi_pinctrl_ops;
 	pmx->pctl_desc.pmxops = &pinctrl_scmi_pinmux_ops;
 	pmx->pctl_desc.confops = &pinctrl_scmi_pinconf_ops;
+	pmx->pctl_desc.custom_params = pinctrl_scmi_oem_dt_params;
+	pmx->pctl_desc.num_custom_params = ARRAY_SIZE(pinctrl_scmi_oem_dt_params);
+#ifdef CONFIG_DEBUG_FS
+	pmx->pctl_desc.custom_conf_items = pinctrl_scmi_oem_conf_items;
+#endif
 
 	ret = pinctrl_scmi_get_pins(pmx, &pmx->pctl_desc);
 	if (ret)
diff --git a/drivers/pinctrl/pinctrl-scmi.h b/drivers/pinctrl/pinctrl-scmi.h
new file mode 100644
index 000000000000..fcc61bc19c98
--- /dev/null
+++ b/drivers/pinctrl/pinctrl-scmi.h
@@ -0,0 +1,15 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright 2024 NXP
+ */
+
+#ifndef __DRIVERS_PINCTRL_SCMI_H
+#define __DRIVERS_PINCTRL_SCMI_H
+
+/* OEM VENDOR Pin Configuration Type */
+#define IMX_SCMI_PIN_MUX	192
+#define IMX_SCMI_PIN_CONF	193
+#define IMX_SCMI_PIN_DAISY_ID	194
+#define IMX_SCMI_PIN_DAISY_CFG	195
+
+#endif /* __DRIVERS_PINCTRL_SCMI_H */

-- 
2.37.1