[PATCH v2 1/2] ARM: dts: imx6sx: Add LDB support

[PATCH v2 1/2] ARM: dts: imx6sx: Add LDB support

[Fabio Estevam]

From: Fabio Estevam <festevam@denx.de>

i.MX6SX has an LVDS controller that is connected to the eLCDIF.

Add support for it.

Signed-off-by: Fabio Estevam <festevam@denx.de>
---
Changes since v1:
- Do not use simple-bus for gpr (Marek and Krzysztof).

 arch/arm/boot/dts/imx6sx.dtsi | 39 +++++++++++++++++++++++++++++++++++
 1 file changed, 39 insertions(+)

diff --git a/arch/arm/boot/dts/imx6sx.dtsi b/arch/arm/boot/dts/imx6sx.dtsi
index 4233943a1cca..565b95b36b77 100644
--- a/arch/arm/boot/dts/imx6sx.dtsi
+++ b/arch/arm/boot/dts/imx6sx.dtsi
@@ -844,7 +844,38 @@ iomuxc: pinctrl@20e0000 {
 			gpr: iomuxc-gpr@20e4000 {
 				compatible = "fsl,imx6sx-iomuxc-gpr",
 					     "fsl,imx6q-iomuxc-gpr", "syscon";
+				#address-cells = <1>;
+				#size-cells = <1>;
 				reg = <0x020e4000 0x4000>;
+
+				lvds_bridge: bridge@18 {
+					compatible = "fsl,imx6sx-ldb";
+					clocks = <&clks IMX6SX_CLK_LDB_DI0>;
+					clock-names = "ldb";
+					reg = <0x18 0x4>;
+					reg-names = "ldb";
+					status = "disabled";
+
+					ports {
+						#address-cells = <1>;
+						#size-cells = <0>;
+
+						port@0 {
+							reg = <0>;
+
+							ldb_from_lcdif1: endpoint {
+								remote-endpoint = <&lcdif1_to_ldb>;
+							};
+						};
+
+						port@1 {
+							reg = <1>;
+
+							ldb_lvds_ch0: endpoint {
+							};
+						};
+					};
+				};
 			};
 
 			sdma: dma-controller@20ec000 {
@@ -1278,6 +1309,14 @@ lcdif1: lcdif@2220000 {
 					clock-names = "pix", "axi", "disp_axi";
 					power-domains = <&pd_disp>;
 					status = "disabled";
+
+					ports {
+						port {
+							lcdif1_to_ldb: endpoint {
+								remote-endpoint = <&ldb_from_lcdif1>;
+							};
+						};
+					};
 				};
 
 				lcdif2: lcdif@2224000 {
-- 
2.34.1

[PATCH v2 2/2] soc: imx: imx6sx-gpr: Introduce a GPR driver

[Fabio Estevam]

From: Fabio Estevam <festevam@denx.de>

The motivation for this imx6sx-gpr driver is to allow describing
the LVDS LDB bridge as a GPR subnode.

Signed-off-by: Fabio Estevam <festevam@denx.de>
---
Changes since v1:
- Newly introduced.

 drivers/soc/imx/Makefile     |  1 +
 drivers/soc/imx/imx6sx-gpr.c | 29 +++++++++++++++++++++++++++++
 2 files changed, 30 insertions(+)
 create mode 100644 drivers/soc/imx/imx6sx-gpr.c

diff --git a/drivers/soc/imx/Makefile b/drivers/soc/imx/Makefile
index a28c44a1f16a..9840d4c41015 100644
--- a/drivers/soc/imx/Makefile
+++ b/drivers/soc/imx/Makefile
@@ -4,6 +4,7 @@ obj-$(CONFIG_ARCH_MXC) += soc-imx.o
 endif
 obj-$(CONFIG_HAVE_IMX_GPC) += gpc.o
 obj-$(CONFIG_IMX_GPCV2_PM_DOMAINS) += gpcv2.o
+obj-$(CONFIG_SOC_IMX6SX) += imx6sx-gpr.o
 obj-$(CONFIG_SOC_IMX8M) += soc-imx8m.o
 obj-$(CONFIG_IMX8M_BLK_CTRL) += imx8m-blk-ctrl.o
 obj-$(CONFIG_IMX8M_BLK_CTRL) += imx8mp-blk-ctrl.o
diff --git a/drivers/soc/imx/imx6sx-gpr.c b/drivers/soc/imx/imx6sx-gpr.c
new file mode 100644
index 000000000000..7684acbe43ff
--- /dev/null
+++ b/drivers/soc/imx/imx6sx-gpr.c
@@ -0,0 +1,29 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#include <linux/module.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
+
+static int imx6sx_gpr_probe(struct platform_device *pdev)
+{
+	return devm_of_platform_populate(&pdev->dev);
+}
+
+static const struct of_device_id imx6sx_gpr_ids[] = {
+	{ .compatible = "fsl,imx6sx-iomuxc-gpr" },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, imx6sx_gpr_ids);
+
+static struct platform_driver imx6sx_gpr_driver = {
+	.driver = {
+		.name	= "imx6sx_gpr",
+		.of_match_table = imx6sx_gpr_ids,
+	},
+	.probe = imx6sx_gpr_probe,
+};
+module_platform_driver(imx6sx_gpr_driver);
+
+MODULE_AUTHOR("Fabio Estevam <festevam@denx.de>");
+MODULE_DESCRIPTION("NXP i.MX6SX GPR driver");
+MODULE_LICENSE("GPL");
-- 
2.34.1

Re: [PATCH v2 2/2] soc: imx: imx6sx-gpr: Introduce a GPR driver

[Conor Dooley]

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On Thu, May 18, 2023 at 04:26:28PM -0300, Fabio Estevam wrote:

> +static const struct of_device_id imx6sx_gpr_ids[] = {
> +	{ .compatible = "fsl,imx6sx-iomuxc-gpr" },

Is this an undocumented compatible?

Cheers,
Conor.

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