linux-kernel - [RFC PATCH 1/1] nvmem: microchip-otpc: Add support for SAM9X60

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Message-Id: <20240412140802.1571935-2-ada@thorsis.com>
Date: Fri, 12 Apr 2024 16:08:02 +0200
From: Alexander Dahl <ada@...rsis.com>
To: Claudiu Beznea <claudiu.beznea@...on.dev>
Cc: linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: [RFC PATCH 1/1] nvmem: microchip-otpc: Add support for SAM9X60

---
 .../dts/microchip/at91-sam9x60_curiosity.dts     |  4 ++++
 arch/arm/boot/dts/microchip/sam9x60.dtsi         |  7 +++++++
 drivers/nvmem/microchip-otpc.c                   | 16 +++++++++++++---
 3 files changed, 24 insertions(+), 3 deletions(-)

diff --git a/arch/arm/boot/dts/microchip/at91-sam9x60_curiosity.dts b/arch/arm/boot/dts/microchip/at91-sam9x60_curiosity.dts
index c6fbdd29019f..754ce8134f73 100644
--- a/arch/arm/boot/dts/microchip/at91-sam9x60_curiosity.dts
+++ b/arch/arm/boot/dts/microchip/at91-sam9x60_curiosity.dts
@@ -254,6 +254,10 @@ ethernet-phy@0 {
 	};
 };
 
+&otpc {
+	status = "okay";
+};
+
 &pinctrl {
 	adc {
 		pinctrl_adc_default: adc-default {
diff --git a/arch/arm/boot/dts/microchip/sam9x60.dtsi b/arch/arm/boot/dts/microchip/sam9x60.dtsi
index 291540e5d81e..010c45f533fe 100644
--- a/arch/arm/boot/dts/microchip/sam9x60.dtsi
+++ b/arch/arm/boot/dts/microchip/sam9x60.dtsi
@@ -156,6 +156,13 @@ sdmmc1: sdio-host@...00000 {
 			status = "disabled";
 		};
 
+		otpc: efuse@...00000 {
+			compatible = "microchip,sam9x60-otpc", "syscon";
+			reg = <0xeff00000 0xec>;
+			#address-cells = <1>;
+			#size-cells = <1>;
+		};
+
 		apb {
 			compatible = "simple-bus";
 			#address-cells = <1>;
diff --git a/drivers/nvmem/microchip-otpc.c b/drivers/nvmem/microchip-otpc.c
index 7cf81738a3e0..af9ab1158a2b 100644
--- a/drivers/nvmem/microchip-otpc.c
+++ b/drivers/nvmem/microchip-otpc.c
@@ -8,6 +8,7 @@
  */
 
 #include <linux/bitfield.h>
+#include <linux/dev_printk.h>
 #include <linux/iopoll.h>
 #include <linux/module.h>
 #include <linux/nvmem-provider.h>
@@ -248,29 +249,38 @@ static int mchp_otpc_probe(struct platform_device *pdev)
 	int ret;
 
 	otpc = devm_kzalloc(&pdev->dev, sizeof(*otpc), GFP_KERNEL);
-	if (!otpc)
+	if (!otpc) {
+		dev_err(&pdev->dev, "devm_kzalloc() error\n");
 		return -ENOMEM;
+	}
 
 	otpc->base = devm_platform_ioremap_resource(pdev, 0);
-	if (IS_ERR(otpc->base))
+	if (IS_ERR(otpc->base)) {
+		dev_err(&pdev->dev, "devm_platform_ioremap_resource() error\n");
 		return PTR_ERR(otpc->base);
+	}
 
 	otpc->dev = &pdev->dev;
 	ret = mchp_otpc_init_packets_list(otpc, &size);
-	if (ret)
+	if (ret) {
+		dev_err(&pdev->dev, "mchp_otpc_init_packets_list() error (%d)\n", ret);
 		return ret;
+	}
 
 	mchp_nvmem_config.dev = otpc->dev;
 	mchp_nvmem_config.add_legacy_fixed_of_cells = true;
 	mchp_nvmem_config.size = size;
 	mchp_nvmem_config.priv = otpc;
 	nvmem = devm_nvmem_register(&pdev->dev, &mchp_nvmem_config);
+	if (!nvmem)
+		dev_err(&pdev->dev, "devm_nvmem_register() error\n");
 
 	return PTR_ERR_OR_ZERO(nvmem);
 }
 
 static const struct of_device_id __maybe_unused mchp_otpc_ids[] = {
 	{ .compatible = "microchip,sama7g5-otpc", },
+	{ .compatible = "microchip,sam9x60-otpc", },
 	{ },
 };
 MODULE_DEVICE_TABLE(of, mchp_otpc_ids);
-- 
2.39.2