[PATCH NOT APPLY v2 6/6] pinctrl: scmi: implement pinctrl_scmi_imx_dt_node_to_map

Peng Fan (OSS)
2024-01-04T10:45:19Z

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

i.MX95 System Manager FW supports SCMI PINCTRL protocol, but uses
OEM Pin Configuration type, so need i.MX specific dt_node_to_map.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
---
drivers/pinctrl/Makefile | 2 +-
drivers/pinctrl/pinctrl-scmi-imx.c | 117 +++++++++++++++++++++++++++++++++++++
drivers/pinctrl/pinctrl-scmi.c | 16 +++++
drivers/pinctrl/pinctrl-scmi.h | 12 ++++
4 files changed, 146 insertions(+), 1 deletion(-)

diff --git a/drivers/pinctrl/Makefile b/drivers/pinctrl/Makefile
index ba755ed2d46c..d96b7ede1355 100644
--- a/drivers/pinctrl/Makefile
+++ b/drivers/pinctrl/Makefile
@@ -44,7 +44,7 @@ obj-$(CONFIG_PINCTRL_PIC32) += pinctrl-pic32.o
obj-$(CONFIG_PINCTRL_PISTACHIO) += pinctrl-pistachio.o
obj-$(CONFIG_PINCTRL_RK805) += pinctrl-rk805.o
obj-$(CONFIG_PINCTRL_ROCKCHIP) += pinctrl-rockchip.o
-obj-$(CONFIG_PINCTRL_SCMI) += pinctrl-scmi.o
+obj-$(CONFIG_PINCTRL_SCMI) += pinctrl-scmi.o pinctrl-scmi-imx.o
obj-$(CONFIG_PINCTRL_SINGLE) += pinctrl-single.o
obj-$(CONFIG_PINCTRL_ST) += pinctrl-st.o
obj-$(CONFIG_PINCTRL_STMFX) += pinctrl-stmfx.o
diff --git a/drivers/pinctrl/pinctrl-scmi-imx.c b/drivers/pinctrl/pinctrl-scmi-imx.c
new file mode 100644
index 000000000000..e9d02e4c2cc1
--- /dev/null
+++ b/drivers/pinctrl/pinctrl-scmi-imx.c
@@ -0,0 +1,117 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright 2023 NXP
+ */
+
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/of.h>
+#include <linux/slab.h>
+
+#include <linux/pinctrl/pinconf.h>
+#include <linux/pinctrl/pinconf-generic.h>
+#include <linux/pinctrl/pinctrl.h>
+#include <linux/pinctrl/pinmux.h>
+
+#include "pinctrl-scmi.h"
+#include "pinctrl-utils.h"
+#include "core.h"
+#include "pinconf.h"
+
+/* SCMI pin control types, aligned with SCMI firmware */
+#define IMX_SCMI_PIN_TYPE_MUX 192
+#define IMX_SCMI_PIN_TYPE_CONFIG 193
+#define IMX_SCMI_PIN_TYPE_DAISY_ID 194
+#define IMX_SCMI_PIN_TYPE_DAISY_CFG 195
+
+#define IMX_SCMI_NO_PAD_CTL BIT(31)
+#define IMX_SCMI_PAD_SION BIT(30)
+#define IMX_SCMI_IOMUXC_CONFIG_SION BIT(4)
+
+#define IMX_SCMI_NUM_CFG 4
+#define IMX_SCMI_PIN_SIZE 24
+
+int pinctrl_scmi_imx_dt_node_to_map(struct pinctrl_dev *pctldev, struct device_node *np,
+ struct pinctrl_map **map, unsigned int *num_maps)
+{
+ struct pinctrl_map *new_map;
+ const __be32 *list;
+ unsigned long *configs = NULL;
+ unsigned long cfg[IMX_SCMI_NUM_CFG];
+ int map_num, size, pin_size, pin_id, num_pins;
+ int mux_reg, conf_reg, input_reg, mux_val, conf_val, input_val;
+ int i, j;
+ uint32_t ncfg;
+ static uint32_t daisy_off;
+
+ if (!daisy_off) {
+ if (of_machine_is_compatible("fsl,imx95"))
+ daisy_off = 0x408;
+ else
+ dev_err(pctldev->dev, "platform not support scmi pinctrl\n");
+ }
+
+ list = of_get_property(np, "fsl,pins", &size);
+ if (!list) {
+ dev_err(pctldev->dev, "no fsl,pins property in node %pOF\n", np);
+ return -EINVAL;
+ }
+
+ pin_size = IMX_SCMI_PIN_SIZE;
+
+ if (!size || size % pin_size) {
+ dev_err(pctldev->dev, "Invalid fsl,pins or pins property in node %pOF\n", np);
+ return -EINVAL;
+ }
+
+ num_pins = size / pin_size;
+ map_num = num_pins;
+
+ new_map = kmalloc_array(map_num, sizeof(struct pinctrl_map),
+ GFP_KERNEL);
+ if (!new_map)
+ return -ENOMEM;
+
+ *map = new_map;
+ *num_maps = map_num;
+
+ /* create config map */
+ for (i = 0; i < num_pins; i++) {
+ j = 0;
+ ncfg = IMX_SCMI_NUM_CFG;
+ mux_reg = be32_to_cpu(*list++);
+ conf_reg = be32_to_cpu(*list++);
+ input_reg = be32_to_cpu(*list++);
+ mux_val = be32_to_cpu(*list++);
+ input_val = be32_to_cpu(*list++);
+ conf_val = be32_to_cpu(*list++);
+ if (conf_val & IMX_SCMI_PAD_SION)
+ mux_val |= IMX_SCMI_IOMUXC_CONFIG_SION;
+
+ pin_id = mux_reg / 4;
+
+ cfg[j++] = pinconf_to_config_packed(IMX_SCMI_PIN_TYPE_MUX, mux_val);
+
+ if (!conf_reg || (conf_val & IMX_SCMI_NO_PAD_CTL))
+ ncfg--;
+ else
+ cfg[j++] = pinconf_to_config_packed(IMX_SCMI_PIN_TYPE_CONFIG, conf_val);
+
+ if (!input_reg) {
+ ncfg -= 2;
+ } else {
+ cfg[j++] = pinconf_to_config_packed(IMX_SCMI_PIN_TYPE_DAISY_ID,
+ (input_reg - daisy_off) / 4);
+ cfg[j++] = pinconf_to_config_packed(IMX_SCMI_PIN_TYPE_DAISY_CFG, input_val);
+ }
+
+ configs = kmemdup(cfg, ncfg * sizeof(unsigned long), GFP_KERNEL);
+
+ new_map[i].type = PIN_MAP_TYPE_CONFIGS_PIN;
+ new_map[i].data.configs.group_or_pin = pin_get_name(pctldev, pin_id);
+ new_map[i].data.configs.configs = configs;
+ new_map[i].data.configs.num_configs = ncfg;
+ }
+
+ return 0;
+}
diff --git a/drivers/pinctrl/pinctrl-scmi.c b/drivers/pinctrl/pinctrl-scmi.c
index 146308d27f54..b49cbfbddbc9 100644
--- a/drivers/pinctrl/pinctrl-scmi.c
+++ b/drivers/pinctrl/pinctrl-scmi.c
@@ -9,6 +9,7 @@
#include <linux/device.h>
#include <linux/err.h>
#include <linux/module.h>
+#include <linux/of.h>
#include <linux/seq_file.h>
#include <linux/scmi_protocol.h>
#include <linux/slab.h>
@@ -19,6 +20,7 @@
#include <linux/pinctrl/pinctrl.h>
#include <linux/pinctrl/pinmux.h>

+#include "pinctrl-scmi.h"
#include "pinctrl-utils.h"
#include "core.h"
#include "pinconf.h"
@@ -89,6 +91,16 @@ static const struct pinctrl_ops pinctrl_scmi_pinctrl_ops = {
#endif
};

+static const struct pinctrl_ops pinctrl_scmi_imx_pinctrl_ops = {
+ .get_groups_count = pinctrl_scmi_get_groups_count,
+ .get_group_name = pinctrl_scmi_get_group_name,
+ .get_group_pins = pinctrl_scmi_get_group_pins,
+#ifdef CONFIG_OF
+ .dt_node_to_map = pinctrl_scmi_imx_dt_node_to_map,
+ .dt_free_map = pinconf_generic_dt_free_map,
+#endif
+};
+
static int pinctrl_scmi_get_functions_count(struct pinctrl_dev *pctldev)
{
struct scmi_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev);
@@ -439,6 +451,7 @@ static int pinctrl_scmi_get_pins(struct scmi_pinctrl *pmx,

static const struct scmi_device_id scmi_id_table[] = {
{ SCMI_PROTOCOL_PINCTRL, "pinctrl" },
+ { SCMI_PROTOCOL_PINCTRL, "pinctrl-scmi-imx", "fsl,imx95-scmi-pinctrl" },
{ }
};
MODULE_DEVICE_TABLE(scmi, scmi_id_table);
@@ -481,6 +494,9 @@ static int scmi_pinctrl_probe(struct scmi_device *sdev)
pmx->pctl_desc.pmxops = &pinctrl_scmi_pinmux_ops;
pmx->pctl_desc.confops = &pinctrl_scmi_pinconf_ops;

+ if (device_is_compatible(dev, "fsl,imx95-scmi-pinctrl"))
+ pmx->pctl_desc.pctlops = &pinctrl_scmi_imx_pinctrl_ops;
+
ret = pinctrl_scmi_get_pins(pmx, &pmx->pctl_desc.npins,
&pmx->pctl_desc.pins);
if (ret)
diff --git a/drivers/pinctrl/pinctrl-scmi.h b/drivers/pinctrl/pinctrl-scmi.h
new file mode 100644
index 000000000000..25863b4428fe
--- /dev/null
+++ b/drivers/pinctrl/pinctrl-scmi.h
@@ -0,0 +1,12 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright 2023 NXP
+ */
+
+#ifndef __DRIVERS_PINCTRL_SCMI_H
+#define __DRIVERS_PINCTRL_SCMI_H
+
+int pinctrl_scmi_imx_dt_node_to_map(struct pinctrl_dev *pctldev, struct device_node *np,
+ struct pinctrl_map **map, unsigned int *num_maps);
+
+#endif /* __DRIVERS_PINCTRL_SCMI_H */

--
2.37.1