Merge branch 'for-next' of https://git.kernel.org/pub/scm/linux/kernel/git/srini/nvmem.git

author: Mark Brown <broonie@kernel.org> 2026-05-29 23:14:22 +0100
committer: Mark Brown <broonie@kernel.org> 2026-05-29 23:14:22 +0100
commit: a7a99e76d203e7f6621804f33148cb7afa7818f2 (patch)
tree: 5e41a013924da155246aa2f87ec14f53733dcf5e
parent: 375761e00da5ebaa9940bea5c7349ba9c52bd9a5 (diff)
parent: 69679101cc8935b9f4032678c12612ea584a573a (diff)
download: linux-next-history-a7a99e76d203e7f6621804f33148cb7afa7818f2.tar.gz
12 files changed, 238 insertions, 25 deletions
diff --git a/Documentation/devicetree/bindings/nvmem/airoha,smc-efuses.yaml b/Documentation/devicetree/bindings/nvmem/airoha,smc-efuses.yaml
new file mode 100644
index 0000000000000..c52f8d4bec392
--- /dev/null
+++ b/Documentation/devicetree/bindings/nvmem/airoha,smc-efuses.yaml
@@ -0,0 +1,67 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/nvmem/airoha,smc-efuses.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Airoha SMC eFuses
+
+description: |
+  Airoha new SoC AN7581 expose banks of eFuse accessible
+  via specific SMC commands.
+
+  2 different bank of eFuse or 64 cells of 32 bit are exposed
+  read-only used to give information on HW Revision, PHY Calibration,
+  Device Model, Private Key...
+
+maintainers:
+  - Christian Marangi <ansuelsmth@gmail.com>
+
+properties:
+  compatible:
+    enum:
+      - airoha,an7581-efuses
+
+  "#address-cells":
+    const: 1
+
+  "#size-cells":
+    const: 0
+
+patternProperties:
+  '^efuse-bank@[0-1]$':
+    type: object
+
+    allOf:
+      - $ref: nvmem.yaml#
+
+    properties:
+      reg:
+        description: Identify the eFuse bank.
+        enum: [0, 1]
+
+    required:
+      - reg
+
+    unevaluatedProperties: false
+
+required:
+  - compatible
+  - '#address-cells'
+  - '#size-cells'
+
+additionalProperties: false
+
+examples:
+  - |
+    efuse {
+        compatible = "airoha,an7581-efuses";
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        efuse-bank@0 {
+           reg = <0>;
+        };
+    };
+
+...
diff --git a/Documentation/devicetree/bindings/nvmem/microchip,lan9662-otpc.yaml b/Documentation/devicetree/bindings/nvmem/microchip,lan9662-otpc.yaml
index f97c6beb4766a..c03e96afe5641 100644
--- a/Documentation/devicetree/bindings/nvmem/microchip,lan9662-otpc.yaml
+++ b/Documentation/devicetree/bindings/nvmem/microchip,lan9662-otpc.yaml
@@ -25,6 +25,7 @@ properties:
           - const: microchip,lan9662-otpc
       - enum:
           - microchip,lan9662-otpc
+          - microchip,lan9691-otpc
 
   reg:
     maxItems: 1
diff --git a/Documentation/devicetree/bindings/nvmem/qcom,qfprom.yaml b/Documentation/devicetree/bindings/nvmem/qcom,qfprom.yaml
index 2ab047f2bb69d..8134ddb54e130 100644
--- a/Documentation/devicetree/bindings/nvmem/qcom,qfprom.yaml
+++ b/Documentation/devicetree/bindings/nvmem/qcom,qfprom.yaml
@@ -19,6 +19,8 @@ properties:
       - enum:
           - qcom,apq8064-qfprom
           - qcom,apq8084-qfprom
+          - qcom,glymur-qfprom
+          - qcom,hawi-qfprom
           - qcom,ipq5018-qfprom
           - qcom,ipq5332-qfprom
           - qcom,ipq5424-qfprom
@@ -27,6 +29,7 @@ properties:
           - qcom,ipq8074-qfprom
           - qcom,ipq9574-qfprom
           - qcom,kaanapali-qfprom
+          - qcom,milos-qfprom
           - qcom,msm8226-qfprom
           - qcom,msm8916-qfprom
           - qcom,msm8917-qfprom
@@ -48,6 +51,7 @@ properties:
           - qcom,sdm630-qfprom
           - qcom,sdm670-qfprom
           - qcom,sdm845-qfprom
+          - qcom,shikra-qfprom
           - qcom,sm6115-qfprom
           - qcom,sm6350-qfprom
           - qcom,sm6375-qfprom
diff --git a/drivers/nvmem/Kconfig b/drivers/nvmem/Kconfig
index 74ddbd0f79b0e..e10f7ff725ff9 100644
--- a/drivers/nvmem/Kconfig
+++ b/drivers/nvmem/Kconfig
@@ -28,6 +28,19 @@ source "drivers/nvmem/layouts/Kconfig"
 
 # Devices
 
+config NVMEM_AIROHA_SMC_EFUSES
+	tristate "Airoha SMC eFuse support"
+	depends on ARCH_AIROHA || COMPILE_TEST
+	depends on HAVE_ARM_SMCCC
+	default ARCH_AIROHA
+	help
+	  Say y here to enable support for reading eFuses on Airoha AN7581
+	  SoCs. These are e.g. used to store factory programmed
+	  calibration data required for the PCIe or the USB-C PHY or Thermal.
+
+	  This driver can also be built as a module. If so, the module will
+	  be called nvmem-airoha-smc-efuses.
+
 config NVMEM_AN8855_EFUSE
 	tristate "Airoha AN8855 eFuse support"
 	depends on COMPILE_TEST
@@ -138,7 +151,7 @@ config NVMEM_JZ4780_EFUSE
 
 config NVMEM_LAN9662_OTPC
 	tristate "Microchip LAN9662 OTP controller support"
-	depends on SOC_LAN966 || COMPILE_TEST
+	depends on SOC_LAN966 || ARCH_LAN969X || COMPILE_TEST
 	depends on HAS_IOMEM
 	help
 	  This driver enables the OTP controller available on Microchip LAN9662
@@ -262,7 +275,7 @@ config NVMEM_S32G_OCOTP
 	  Programmable memory pages.
 
 config NVMEM_QCOM_QFPROM
-	tristate "QCOM QFPROM Support"
+	tristate "Qualcomm QFPROM Support"
 	depends on ARCH_QCOM || COMPILE_TEST
 	depends on HAS_IOMEM
 	help
@@ -273,7 +286,7 @@ config NVMEM_QCOM_QFPROM
 	  will be called nvmem_qfprom.
 
 config NVMEM_QCOM_SEC_QFPROM
-        tristate "QCOM SECURE QFPROM Support"
+        tristate "Qualcomm SECURE QFPROM Support"
         depends on ARCH_QCOM || COMPILE_TEST
         depends on HAS_IOMEM
         depends on OF
@@ -303,7 +316,6 @@ config NVMEM_RAVE_SP_EEPROM
 config NVMEM_RCAR_EFUSE
 	tristate "Renesas R-Car Gen4 E-FUSE support"
 	depends on (ARCH_RENESAS && ARM64) || COMPILE_TEST
-	depends on NVMEM
 	help
 	  Enable support for reading the fuses in the E-FUSE or OTP
 	  non-volatile memory block on Renesas R-Car Gen4 SoCs.
@@ -483,4 +495,4 @@ config NVMEM_QORIQ_EFUSE
 	  This driver can also be built as a module. If so, the module
 	  will be called nvmem_qoriq_efuse.
 
-endif
+endif # NVMEM
diff --git a/drivers/nvmem/Makefile b/drivers/nvmem/Makefile
index 7252b8ec88d46..f6f2bc51dee19 100644
--- a/drivers/nvmem/Makefile
+++ b/drivers/nvmem/Makefile
@@ -10,6 +10,8 @@ nvmem_layouts-y			:= layouts.o
 obj-y				+= layouts/
 
 # Devices
+obj-$(CONFIG_NVMEM_AIROHA_SMC_EFUSES)	+= nvmem-airoha-smc-efuses.o
+nvmem-airoha-smc-efuses-y 		:= airoha-smc-efuses.o
 obj-$(CONFIG_NVMEM_AN8855_EFUSE)	+= nvmem-an8855-efuse.o
 nvmem-an8855-efuse-y 			:= an8855-efuse.o
 obj-$(CONFIG_NVMEM_APPLE_EFUSES)	+= nvmem-apple-efuses.o
diff --git a/drivers/nvmem/airoha-smc-efuses.c b/drivers/nvmem/airoha-smc-efuses.c
new file mode 100644
index 0000000000000..e56a99f4aa1f9
--- /dev/null
+++ b/drivers/nvmem/airoha-smc-efuses.c
@@ -0,0 +1,125 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ *  Author: Christian Marangi <ansuelsmth@gmail.com>
+ */
+
+#include <linux/arm-smccc.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/nvmem-provider.h>
+#include <linux/platform_device.h>
+#include <linux/of.h>
+#include <linux/regmap.h>
+
+#define AIROHA_SMC_EFUSE_FID		0x82000001
+#define AIROHA_SMC_EFUSE_SUB_ID_READ	0x44414552
+
+#define AIROHA_EFUSE_CELLS		64
+
+struct airoha_efuse_bank_priv {
+	u32 bank_index;
+};
+
+static int airoha_efuse_read(void *context, unsigned int offset,
+			     void *val, size_t bytes)
+{
+	struct regmap *regmap = context;
+
+	return regmap_bulk_read(regmap, offset,
+				val, bytes / sizeof(u32));
+}
+
+static int airoha_efuse_reg_read(void *context, unsigned int offset,
+				 unsigned int *val)
+{
+	struct airoha_efuse_bank_priv *priv = context;
+	struct arm_smccc_res res;
+
+	arm_smccc_1_1_invoke(AIROHA_SMC_EFUSE_FID,
+			     AIROHA_SMC_EFUSE_SUB_ID_READ,
+			     priv->bank_index, offset, 0, 0, 0, 0, &res);
+
+	/* check if SMC reported an error */
+	if (res.a0)
+		return -EIO;
+
+	*val = res.a1;
+	return 0;
+}
+
+static int airoha_efuse_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	int ret;
+
+	for_each_child_of_node_scoped(dev->of_node, child) {
+		struct nvmem_config nvmem_config = {
+			.size = AIROHA_EFUSE_CELLS * sizeof(u32),
+			.stride = sizeof(u32),
+			.word_size = sizeof(u32),
+			.reg_read = airoha_efuse_read,
+		};
+		struct regmap_config regmap_config = {
+			.reg_read = airoha_efuse_reg_read,
+			.reg_bits = 32,
+			.val_bits = 32,
+			.reg_stride = 4,
+		};
+		struct airoha_efuse_bank_priv *priv;
+		struct nvmem_device *nvmem;
+		struct regmap *regmap;
+		const char *name;
+		u32 bank;
+
+		ret = of_property_read_u32(child, "reg", &bank);
+		if (ret)
+			return ret;
+
+		priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+		if (!priv)
+			return -ENOMEM;
+
+		name = devm_kasprintf(dev, GFP_KERNEL, "airoha-efuse-%u",
+				      bank);
+		if (!name)
+			return -ENOMEM;
+
+		priv->bank_index = bank;
+
+		regmap_config.name = name;
+		regmap = devm_regmap_init(dev, NULL, priv,
+					  &regmap_config);
+		if (IS_ERR(regmap))
+			return PTR_ERR(regmap);
+
+		nvmem_config.name = name;
+		nvmem_config.priv = regmap;
+		nvmem_config.dev = dev;
+		nvmem_config.id = bank;
+		nvmem_config.of_node = child;
+		nvmem = devm_nvmem_register(dev, &nvmem_config);
+		if (IS_ERR(nvmem))
+			return PTR_ERR(nvmem);
+	}
+
+	return 0;
+}
+
+static const struct of_device_id airoha_efuse_of_match[] = {
+	{ .compatible = "airoha,an7581-efuses", },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, airoha_efuse_of_match);
+
+static struct platform_driver airoha_efuse_driver = {
+	.probe = airoha_efuse_probe,
+	.driver = {
+		.name = "airoha-efuse",
+		.of_match_table = airoha_efuse_of_match,
+	},
+};
+module_platform_driver(airoha_efuse_driver);
+
+MODULE_AUTHOR("Christian Marangi <ansuelsmth@gmail.com>");
+MODULE_DESCRIPTION("Driver for Airoha SMC eFUSEs");
+MODULE_LICENSE("GPL");
diff --git a/drivers/nvmem/core.c b/drivers/nvmem/core.c
index 311cb2e5a5c02..be28a366f6031 100644
--- a/drivers/nvmem/core.c
+++ b/drivers/nvmem/core.c
@@ -1019,6 +1019,10 @@ struct nvmem_device *nvmem_register(const struct nvmem_config *config)
 	if (rval)
 		goto err_remove_dev;
 
+	/* If the device has WP GPIO, default to read-only */
+	if (nvmem->wp_gpio)
+		nvmem->read_only = true;
+
 #ifdef CONFIG_NVMEM_SYSFS
 	rval = nvmem_populate_sysfs_cells(nvmem);
 	if (rval)
diff --git a/drivers/nvmem/lan9662-otpc.c b/drivers/nvmem/lan9662-otpc.c
index 56fc19f092a7f..62d1d6381bf88 100644
--- a/drivers/nvmem/lan9662-otpc.c
+++ b/drivers/nvmem/lan9662-otpc.c
@@ -27,7 +27,6 @@
 #define OTP_OTP_STATUS_OTP_CPUMPEN		BIT(1)
 #define OTP_OTP_STATUS_OTP_BUSY			BIT(0)
 
-#define OTP_MEM_SIZE 8192
 #define OTP_SLEEP_US 10
 #define OTP_TIMEOUT_US 500000
 
@@ -176,7 +175,6 @@ static struct nvmem_config otp_config = {
 	.word_size = 1,
 	.reg_read = lan9662_otp_read,
 	.reg_write = lan9662_otp_write,
-	.size = OTP_MEM_SIZE,
 };
 
 static int lan9662_otp_probe(struct platform_device *pdev)
@@ -196,6 +194,7 @@ static int lan9662_otp_probe(struct platform_device *pdev)
 
 	otp_config.priv = otp;
 	otp_config.dev = dev;
+	otp_config.size = (uintptr_t) device_get_match_data(dev);
 
 	nvmem = devm_nvmem_register(dev, &otp_config);
 
@@ -203,7 +202,14 @@ static int lan9662_otp_probe(struct platform_device *pdev)
 }
 
 static const struct of_device_id lan9662_otp_match[] = {
-	{ .compatible = "microchip,lan9662-otpc", },
+	{
+		.compatible = "microchip,lan9662-otpc",
+		.data = (const void *) SZ_8K,
+	},
+	{
+		.compatible = "microchip,lan9691-otpc",
+		.data = (const void *) SZ_16K,
+	},
 	{ },
 };
 MODULE_DEVICE_TABLE(of, lan9662_otp_match);
diff --git a/drivers/nvmem/layouts/onie-tlv.c b/drivers/nvmem/layouts/onie-tlv.c
index 0967a32319a28..8b0f3c1b8a0e9 100644
--- a/drivers/nvmem/layouts/onie-tlv.c
+++ b/drivers/nvmem/layouts/onie-tlv.c
@@ -119,7 +119,7 @@ static int onie_tlv_add_cells(struct device *dev, struct nvmem_device *nvmem,
 
 		cell.name = onie_tlv_cell_name(tlv.type);
 		if (!cell.name)
-			continue;
+			goto next;
 
 		cell.offset = hdr_len + offset + sizeof(tlv.type) + sizeof(tlv.len);
 		cell.bytes = tlv.len;
@@ -132,6 +132,7 @@ static int onie_tlv_add_cells(struct device *dev, struct nvmem_device *nvmem,
 			return ret;
 		}
 
+next:
 		offset += sizeof(tlv) + tlv.len;
 	}
 
diff --git a/drivers/nvmem/layouts/u-boot-env.c b/drivers/nvmem/layouts/u-boot-env.c
index f27f387bb52af..33ec2350386f5 100644
--- a/drivers/nvmem/layouts/u-boot-env.c
+++ b/drivers/nvmem/layouts/u-boot-env.c
@@ -38,9 +38,6 @@ static int u_boot_env_read_post_process_ethaddr(void *context, const char *id, i
 {
 	u8 mac[ETH_ALEN];
 
-	if (bytes != MAC_ADDR_STR_LEN)
-		return -EINVAL;
-
 	if (!mac_pton(buf, mac))
 		return -EINVAL;
 
@@ -75,7 +72,7 @@ static int u_boot_env_parse_cells(struct device *dev, struct nvmem_device *nvmem
 		info.offset = data_offset + value - data;
 		info.bytes = strlen(value);
 		info.np = of_get_child_by_name(dev->of_node, info.name);
-		if (!strcmp(var, "ethaddr")) {
+		if (!strcmp(var, "ethaddr") && info.bytes == MAC_ADDR_STR_LEN) {
 			info.raw_len = strlen(value);
 			info.bytes = ETH_ALEN;
 			info.read_post_process = u_boot_env_read_post_process_ethaddr;
diff --git a/drivers/nvmem/nintendo-otp.c b/drivers/nvmem/nintendo-otp.c
index 355e7f1fc6d54..e45a8a3a9774a 100644
--- a/drivers/nvmem/nintendo-otp.c
+++ b/drivers/nvmem/nintendo-otp.c
@@ -17,7 +17,7 @@
 #include <linux/module.h>
 #include <linux/mod_devicetable.h>
 #include <linux/nvmem-provider.h>
-#include <linux/of_device.h>
+#include <linux/of.h>
 #include <linux/platform_device.h>
 
 #define HW_OTPCMD  0
@@ -74,8 +74,7 @@ MODULE_DEVICE_TABLE(of, nintendo_otp_of_table);
 static int nintendo_otp_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
-	const struct of_device_id *of_id =
-		of_match_device(nintendo_otp_of_table, dev);
+	const struct nintendo_otp_devtype_data *data;
 	struct nvmem_device *nvmem;
 	struct nintendo_otp_priv *priv;
 
@@ -95,8 +94,8 @@ static int nintendo_otp_probe(struct platform_device *pdev)
 	if (IS_ERR(priv->regs))
 		return PTR_ERR(priv->regs);
 
-	if (of_id->data) {
-		const struct nintendo_otp_devtype_data *data = of_id->data;
+	data = of_device_get_match_data(dev);
+	if (data) {
 		config.name = data->name;
 		config.size = data->num_banks * BANK_SIZE;
 	}
diff --git a/drivers/nvmem/rockchip-otp.c b/drivers/nvmem/rockchip-otp.c
index 0ec78b5e19e7d..2c0feb036f3fd 100644
--- a/drivers/nvmem/rockchip-otp.c
+++ b/drivers/nvmem/rockchip-otp.c
@@ -78,9 +78,9 @@ struct rockchip_data {
 struct rockchip_otp {
 	struct device *dev;
 	void __iomem *base;
-	struct clk_bulk_data *clks;
 	struct reset_control *rst;
 	const struct rockchip_data *data;
+	struct clk_bulk_data clks[];
 };
 
 static int rockchip_otp_reset(struct rockchip_otp *otp)
@@ -424,7 +424,7 @@ static int rockchip_otp_probe(struct platform_device *pdev)
 	if (!data)
 		return dev_err_probe(dev, -EINVAL, "failed to get match data\n");
 
-	otp = devm_kzalloc(&pdev->dev, sizeof(struct rockchip_otp),
+	otp = devm_kzalloc(&pdev->dev, struct_size(otp, clks, data->num_clks),
 			   GFP_KERNEL);
 	if (!otp)
 		return -ENOMEM;
@@ -436,11 +436,6 @@ static int rockchip_otp_probe(struct platform_device *pdev)
 		return dev_err_probe(dev, PTR_ERR(otp->base),
 				     "failed to ioremap resource\n");
 
-	otp->clks = devm_kcalloc(dev, data->num_clks, sizeof(*otp->clks),
-				 GFP_KERNEL);
-	if (!otp->clks)
-		return -ENOMEM;
-
 	for (i = 0; i < data->num_clks; ++i)
 		otp->clks[i].id = data->clks[i];
author	Mark Brown <broonie@kernel.org>	2026-05-29 23:14:22 +0100
committer	Mark Brown <broonie@kernel.org>	2026-05-29 23:14:22 +0100
commit	a7a99e76d203e7f6621804f33148cb7afa7818f2 (patch)
tree	5e41a013924da155246aa2f87ec14f53733dcf5e
parent	375761e00da5ebaa9940bea5c7349ba9c52bd9a5 (diff)
parent	69679101cc8935b9f4032678c12612ea584a573a (diff)
download	linux-next-history-a7a99e76d203e7f6621804f33148cb7afa7818f2.tar.gz