pinctrl: Add pinctrl driver for i.MX8

Add pinctrl driver for i.MX8. The pads configuration is controlled
by SCU, so need to ask SCU to configure pads through scfw API.
Add pinctrl-scu to invoke sc_pad_set to configure pads.
Add a new flag IMX8_USE_SCU to differentiate i.MX8 from other platforms
which could directly configure pads from Acore side.
Add CONFIG_PINCTRL_IMX8 as the built gate.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
Reviewed-by: Anatolij Gustschin <agust@denx.de>
Cc: Stefano Babic <sbabic@denx.de>

1 files changed, 40 insertions, 0 deletions

diff --git a/drivers/pinctrl/nxp/pinctrl-imx8.c b/drivers/pinctrl/nxp/pinctrl-imx8.c
new file mode 100644
index 0000000000..0738da0ebe
--- /dev/null
+++ b/drivers/pinctrl/nxp/pinctrl-imx8.c
@@ -0,0 +1,40 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright 2018 NXP
+ */
+
+#include <common.h>
+#include <dm/device.h>
+#include <dm/pinctrl.h>
+
+#include "pinctrl-imx.h"
+
+DECLARE_GLOBAL_DATA_PTR;
+
+static struct imx_pinctrl_soc_info imx8_pinctrl_soc_info = {
+	.flags = IMX8_USE_SCU,
+};
+
+static int imx8_pinctrl_probe(struct udevice *dev)
+{
+	struct imx_pinctrl_soc_info *info =
+		(struct imx_pinctrl_soc_info *)dev_get_driver_data(dev);
+
+	return imx_pinctrl_probe(dev, info);
+}
+
+static const struct udevice_id imx8_pinctrl_match[] = {
+	{ .compatible = "fsl,imx8qxp-iomuxc", .data = (ulong)&imx8_pinctrl_soc_info },
+	{ /* sentinel */ }
+};
+
+U_BOOT_DRIVER(imx8_pinctrl) = {
+	.name = "imx8_pinctrl",
+	.id = UCLASS_PINCTRL,
+	.of_match = of_match_ptr(imx8_pinctrl_match),
+	.probe = imx8_pinctrl_probe,
+	.remove = imx_pinctrl_remove,
+	.priv_auto_alloc_size = sizeof(struct imx_pinctrl_priv),
+	.ops = &imx_pinctrl_ops,
+	.flags = DM_FLAG_PRE_RELOC,
+};