[PATCH 2/3] pinctrl: imx-scmi: Get daisy register offset from DT

Peng Fan (OSS)
2025-05-12T02:22:05Z

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

Parsing the "nxp,iomuxc-daisy-off" to get the daisy register offset,
then no need to hardcode the register offset in driver for new SoCs.

To keep backwards comatibility, still keep the register offset for i.MX95.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
---
drivers/pinctrl/freescale/pinctrl-imx-scmi.c | 26 +++++++++++++++-----------
1 file changed, 15 insertions(+), 11 deletions(-)

diff --git a/drivers/pinctrl/freescale/pinctrl-imx-scmi.c b/drivers/pinctrl/freescale/pinctrl-imx-scmi.c
index 8f15c4c4dc4412dddb40505699fc3f459fdc0adc..7c15244371c20e0d99b1802e480c39aaeeec495b 100644
--- a/drivers/pinctrl/freescale/pinctrl-imx-scmi.c
+++ b/drivers/pinctrl/freescale/pinctrl-imx-scmi.c
@@ -35,6 +35,7 @@ struct scmi_pinctrl_imx {
struct pinctrl_dev *pctldev;
struct pinctrl_desc pctl_desc;
const struct scmi_pinctrl_proto_ops *ops;
+ uint32_t daisy_off;
};

/* SCMI pin control types, aligned with SCMI firmware */
@@ -57,6 +58,7 @@ static int pinctrl_scmi_imx_dt_node_to_map(struct pinctrl_dev *pctldev,
struct pinctrl_map **map,
unsigned int *num_maps)
{
+ struct scmi_pinctrl_imx *pmx = pinctrl_dev_get_drvdata(pctldev);
struct pinctrl_map *new_map;
const __be32 *list;
unsigned long *configs = NULL;
@@ -65,16 +67,6 @@ static int pinctrl_scmi_imx_dt_node_to_map(struct pinctrl_dev *pctldev,
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 = IMX95_DAISY_OFF;
- } else {
- dev_err(pctldev->dev, "platform not support scmi pinctrl\n");
- return -EINVAL;
- }
- }

list = of_get_property(np, "fsl,pins", &size);
if (!list) {
@@ -126,7 +118,7 @@ static int pinctrl_scmi_imx_dt_node_to_map(struct pinctrl_dev *pctldev,
ncfg -= 2;
} else {
cfg[j++] = pinconf_to_config_packed(IMX_SCMI_PIN_DAISY_ID,
- (input_reg - daisy_off) / 4);
+ (input_reg - pmx->daisy_off) / 4);
cfg[j++] = pinconf_to_config_packed(IMX_SCMI_PIN_DAISY_CFG, input_val);
}

@@ -315,6 +307,18 @@ static int scmi_pinctrl_imx_probe(struct scmi_device *sdev)
if (!pmx)
return -ENOMEM;

+ ret = device_property_read_u32(dev, "nxp,iomuxc-daisy-off", &pmx->daisy_off);
+ if (ret) {
+ /*
+ * To keep backwards compatible, new chips should specify
+ * nxp,iomuxc-daisy_off
+ */
+ if (of_machine_is_compatible("fsl,imx95"))
+ pmx->daisy_off = IMX95_DAISY_OFF;
+ else
+ return dev_err_probe(dev, ret, "Failed to get daisy off value\n");
+ }
+
pmx->ph = ph;
pmx->ops = pinctrl_ops;

--
2.37.1