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/openbmc/linux/drivers/nvmem/
H A Dcore.c3 * nvmem framework core.
16 #include <linux/nvmem-consumer.h>
17 #include <linux/nvmem-provider.h>
59 struct nvmem_device *nvmem; member
83 static int __nvmem_reg_read(struct nvmem_device *nvmem, unsigned int offset, in __nvmem_reg_read() argument
86 if (nvmem->reg_read) in __nvmem_reg_read()
87 return nvmem->reg_read(nvmem->priv, offset, val, bytes); in __nvmem_reg_read()
92 static int __nvmem_reg_write(struct nvmem_device *nvmem, unsigned int offset, in __nvmem_reg_write() argument
97 if (nvmem->reg_write) { in __nvmem_reg_write()
98 gpiod_set_value_cansleep(nvmem->wp_gpio, 0); in __nvmem_reg_write()
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H A DMakefile3 # Makefile for nvmem drivers.
11 obj-$(CONFIG_NVMEM_APPLE_EFUSES) += nvmem-apple-efuses.o
12 nvmem-apple-efuses-y := apple-efuses.o
13 obj-$(CONFIG_NVMEM_BCM_OCOTP) += nvmem-bcm-ocotp.o
14 nvmem-bcm-ocotp-y := bcm-ocotp.o
17 obj-$(CONFIG_NVMEM_IMX_IIM) += nvmem-imx-iim.o
18 nvmem-imx-iim-y := imx-iim.o
19 obj-$(CONFIG_NVMEM_IMX_OCOTP) += nvmem-imx-ocotp.o
20 nvmem-imx-ocotp-y := imx-ocotp.o
21 obj-$(CONFIG_NVMEM_IMX_OCOTP_ELE) += nvmem-imx-ocotp-ele.o
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H A DKconfig2 menuconfig NVMEM config
3 bool "NVMEM Support"
5 Support for NVMEM(Non Volatile Memory) devices like EEPROM, EFUSES...
7 This framework is designed to provide a generic interface to NVMEM
12 if NVMEM
15 bool "/sys/bus/nvmem/devices/*/nvmem (sysfs interface)"
19 Say Y here to add a sysfs interface for NVMEM.
22 read/write directly into nvmem.
26 source "drivers/nvmem/layouts/Kconfig"
40 be called nvmem-apple-efuses.
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H A Dzynqmp_nvmem.c7 #include <linux/nvmem-provider.h>
16 struct nvmem_device *nvmem; member
37 .name = "zynqmp-nvmem",
45 { .compatible = "xlnx,zynqmp-nvmem-fw", },
65 priv->nvmem = devm_nvmem_register(dev, &econfig); in zynqmp_nvmem_probe()
67 return PTR_ERR_OR_ZERO(priv->nvmem); in zynqmp_nvmem_probe()
73 .name = "zynqmp-nvmem",
81 MODULE_DESCRIPTION("ZynqMP NVMEM driver");
/openbmc/linux/Documentation/driver-api/
H A Dnvmem.rst4 NVMEM Subsystem
9 This document explains the NVMEM Framework along with the APIs provided,
14 *NVMEM* is the abbreviation for Non Volatile Memory layer. It is used to
18 Before this framework existed, NVMEM drivers like eeprom were stored in
31 NVMEM Providers
34 NVMEM provider refers to an entity that implements methods to initialize, read
37 2. Registering/Unregistering the NVMEM provider
40 A NVMEM provider can register with NVMEM core by supplying relevant
41 nvmem configuration to nvmem_register(), on success core would return a valid
44 nvmem_unregister(nvmem) is used to unregister a previously registered provider.
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/openbmc/linux/Documentation/devicetree/bindings/nvmem/
H A Dnvmem-consumer.yaml4 $id: http://devicetree.org/schemas/nvmem/nvmem-consumer.yaml#
7 title: NVMEM (Non Volatile Memory) Consumer
15 nvmem:
18 List of phandle to the nvmem providers.
20 nvmem-cells:
23 List of phandle to the nvmem data cells.
25 nvmem-names:
27 Names for the each nvmem provider.
29 nvmem-cell-names:
31 Names for each nvmem-cells specified.
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H A Dxlnx,zynqmp-nvmem.txt2 = Zynq UltraScale+ MPSoC nvmem firmware driver binding =
8 - compatible: should be "xlnx,zynqmp-nvmem-fw"
12 bindings/nvmem/nvmem.txt
23 compatible = "xlnx,zynqmp-nvmem-fw";
36 Are device nodes which consume nvmem data cells.
42 nvmem-cells = <&soc_revision>;
43 nvmem-cell-names = "soc_revision";
H A Dnvmem.yaml4 $id: http://devicetree.org/schemas/nvmem/nvmem.yaml#
7 title: NVMEM (Non Volatile Memory)
17 some data on NVMEM, for the OS to be able to retrieve these
42 nvmem-layout:
43 $ref: /schemas/nvmem/layouts/nvmem-layout.yaml
45 Alternative to the statically defined nvmem cells, this
74 nvmem-layout {
/openbmc/linux/Documentation/devicetree/bindings/thermal/
H A Dsprd-thermal.yaml28 nvmem-cells:
31 Reference to nvmem nodes for the calibration data.
33 nvmem-cell-names:
58 nvmem-cells:
61 Reference to an nvmem node for the calibration data.
63 nvmem-cell-names:
68 - nvmem-cells
69 - nvmem-cell-names
78 - nvmem-cells
79 - nvmem-cell-names
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H A Dmediatek,lvts-thermal.yaml39 nvmem-cells:
45 nvmem-cell-names:
66 nvmem-cells:
69 nvmem-cell-names:
81 nvmem-cells:
84 nvmem-cell-names:
93 - nvmem-cells
94 - nvmem-cell-names
116 nvmem-cells = <&lvts_efuse_data1 &lvts_efuse_data2>;
117 nvmem-cell-names = "lvts-calib-data-1", "lvts-calib-data-2";
/openbmc/linux/Documentation/devicetree/bindings/mtd/partitions/
H A Dnvmem-cells.yaml4 $id: http://devicetree.org/schemas/mtd/partitions/nvmem-cells.yaml#
7 title: Nvmem cells
10 Any partition containing the compatible "nvmem-cells" will register as a
11 nvmem provider.
12 Each direct subnodes represents a nvmem cell following the nvmem binding.
13 Nvmem binding to declare nvmem-cells can be found in:
14 Documentation/devicetree/bindings/nvmem/nvmem.yaml
21 - $ref: /schemas/nvmem/nvmem.yaml#
25 const: nvmem-cells
43 compatible = "nvmem-cells";
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/openbmc/linux/Documentation/devicetree/bindings/power/reset/
H A Dnvmem-reboot-mode.yaml4 $id: http://devicetree.org/schemas/power/reset/nvmem-reboot-mode.yaml#
7 title: Generic NVMEM reboot mode
14 and stores it in the NVMEM cell named "reboot-mode". The bootloader can
19 const: nvmem-reboot-mode
21 nvmem-cells:
23 A phandle pointing to the nvmem-cells node where the vendor-specific
27 nvmem-cell-names:
38 - nvmem-cells
39 - nvmem-cell-names
46 compatible = "nvmem-reboot-mode";
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/openbmc/linux/include/linux/
H A Dnvmem-provider.h3 * nvmem framework provider.
39 * struct nvmem_keepout - NVMEM register keepout range.
52 * struct nvmem_cell_info - NVMEM cell description
54 * @offset: Offset within the NVMEM device.
77 * struct nvmem_config - NVMEM device configuration
83 * @cells: Optional array of pre-defined NVMEM cells.
85 * @add_legacy_fixed_of_cells: Read fixed NVMEM cells from old OF syntax.
88 * @type: Type of the nvmem storage
100 * @layout: Fixed layout associated with this nvmem device.
102 * Note: A default "nvmem<id>" name will be assigned to the device if
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H A Dnvmem-consumer.h3 * nvmem framework consumer.
27 * @cell_name: Name of the nvmem cell as defined in the name field of
68 /* direct nvmem device read/write interface */
72 void nvmem_device_put(struct nvmem_device *nvmem);
73 void devm_nvmem_device_put(struct device *dev, struct nvmem_device *nvmem);
74 int nvmem_device_read(struct nvmem_device *nvmem, unsigned int offset,
76 int nvmem_device_write(struct nvmem_device *nvmem, unsigned int offset,
78 ssize_t nvmem_device_cell_read(struct nvmem_device *nvmem,
80 int nvmem_device_cell_write(struct nvmem_device *nvmem,
83 const char *nvmem_dev_name(struct nvmem_device *nvmem);
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/openbmc/linux/Documentation/devicetree/bindings/nvmem/layouts/
H A Dfixed-layout.yaml4 $id: http://devicetree.org/schemas/nvmem/layouts/fixed-layout.yaml#
7 title: NVMEM layout for fixed NVMEM cells
10 Many NVMEM devices have hardcoded cells layout (offset and size of defined
11 NVMEM content doesn't change).
13 This binding allows defining such NVMEM layout with its cells. It can be used
14 on top of any NVMEM device.
42 nvmem-layout {
50 #nvmem-cell-cells = <1>;
56 #nvmem-cell-cells = <1>;
/openbmc/linux/Documentation/devicetree/bindings/iio/adc/
H A Dsprd,sc2720-adc.yaml37 nvmem-cells: true
39 nvmem-cell-names: true
51 nvmem-cells:
53 nvmem-cell-names:
60 nvmem-cells:
62 nvmem-cell-names:
77 - nvmem-cells
78 - nvmem-cell-names
95 nvmem-cells = <&adc_big_scale>, <&adc_small_scale>;
96 nvmem-cell-names = "big_scale_calib", "small_scale_calib";
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/openbmc/linux/arch/arm64/boot/dts/freescale/
H A Dfsl-ls1028a-kontron-kbox-a-230-ls.dts59 nvmem-cells = <&base_mac_address 2>;
60 nvmem-cell-names = "mac-address";
65 nvmem-cells = <&base_mac_address 3>;
66 nvmem-cell-names = "mac-address";
87 nvmem-cells = <&base_mac_address 4>;
88 nvmem-cell-names = "mac-address";
97 nvmem-cells = <&base_mac_address 5>;
98 nvmem-cell-names = "mac-address";
107 nvmem-cells = <&base_mac_address 6>;
108 nvmem-cell-names = "mac-address";
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H A Dfsl-ls1028a-kontron-sl28-var2.dts39 nvmem-cells = <&base_mac_address 2>;
40 nvmem-cell-names = "mac-address";
45 nvmem-cells = <&base_mac_address 3>;
46 nvmem-cell-names = "mac-address";
59 nvmem-cells = <&base_mac_address 0>;
60 nvmem-cell-names = "mac-address";
69 nvmem-cells = <&base_mac_address 1>;
70 nvmem-cell-names = "mac-address";
/openbmc/linux/drivers/soc/tegra/fuse/
H A Dfuse-tegra.c11 #include <linux/nvmem-consumer.h>
12 #include <linux/nvmem-provider.h>
119 struct nvmem_config nvmem; in tegra_fuse_probe() local
155 memset(&nvmem, 0, sizeof(nvmem)); in tegra_fuse_probe()
156 nvmem.dev = &pdev->dev; in tegra_fuse_probe()
157 nvmem.name = "fuse"; in tegra_fuse_probe()
158 nvmem.id = -1; in tegra_fuse_probe()
159 nvmem.owner = THIS_MODULE; in tegra_fuse_probe()
160 nvmem.cells = fuse->soc->cells; in tegra_fuse_probe()
161 nvmem.ncells = fuse->soc->num_cells; in tegra_fuse_probe()
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/openbmc/linux/Documentation/devicetree/bindings/net/
H A Dsunplus,sp7021-emac.yaml62 nvmem-cells:
64 - description: nvmem cell address of MAC address
66 nvmem-cell-names:
67 description: names corresponding to the nvmem cells
75 - nvmem-cells
76 - nvmem-cell-names
117 nvmem-cells = <&mac_addr0>;
118 nvmem-cell-names = "mac-address";
125 nvmem-cells = <&mac_addr1>;
126 nvmem-cell-names = "mac-address";
H A Dnixge.txt15 - nvmem-cells: Phandle of nvmem cell containing the MAC address
16 - nvmem-cell-names: Should be "address"
31 nvmem-cells = <&eth1_addr>;
32 nvmem-cell-names = "address";
54 nvmem-cells = <&eth1_addr>;
55 nvmem-cell-names = "address";
70 nvmem-cells = <&eth1_addr>;
71 nvmem-cell-names = "address";
/openbmc/linux/drivers/rtc/
H A Dnvmem.c3 * RTC subsystem, nvmem interface
10 #include <linux/nvmem-consumer.h>
17 struct nvmem_device *nvmem; in devm_rtc_nvmem_register() local
25 nvmem = devm_nvmem_register(dev, nvmem_config); in devm_rtc_nvmem_register()
26 if (IS_ERR(nvmem)) in devm_rtc_nvmem_register()
27 dev_err(dev, "failed to register nvmem device for RTC\n"); in devm_rtc_nvmem_register()
29 return PTR_ERR_OR_ZERO(nvmem); in devm_rtc_nvmem_register()
/openbmc/linux/Documentation/devicetree/bindings/phy/
H A Dsunplus,sp7021-usb2-phy.yaml36 nvmem-cell-names:
37 description: names corresponding to the nvmem cells of disconnect voltage
40 nvmem-cells:
41 description: nvmem cell address of disconnect voltage
55 - nvmem-cell-names
56 - nvmem-cells
70 nvmem-cell-names = "disc_vol";
71 nvmem-cells = <&disc_vol>;
/openbmc/linux/Documentation/ABI/stable/
H A Dsysfs-bus-nvmem1 What: /sys/bus/nvmem/devices/.../nvmem
6 This file allows user to read/write the raw NVMEM contents.
7 Permissions for write to this file depends on the nvmem
14 hexdump /sys/bus/nvmem/devices/qfprom0/nvmem
/openbmc/linux/drivers/nvmem/layouts/
H A Dsl28vpd.c5 #include <linux/nvmem-consumer.h>
6 #include <linux/nvmem-provider.h>
56 static int sl28vpd_v1_check_crc(struct device *dev, struct nvmem_device *nvmem) in sl28vpd_v1_check_crc() argument
65 ret = nvmem_device_read(nvmem, 0, sizeof(data_v1), &data_v1); in sl28vpd_v1_check_crc()
83 static int sl28vpd_add_cells(struct device *dev, struct nvmem_device *nvmem, in sl28vpd_add_cells() argument
93 ret = nvmem_device_read(nvmem, 0, sizeof(hdr), &hdr); in sl28vpd_add_cells()
109 ret = sl28vpd_v1_check_crc(dev, nvmem); in sl28vpd_add_cells()
113 layout_np = of_nvmem_layout_get_container(nvmem); in sl28vpd_add_cells()
126 ret = nvmem_add_one_cell(nvmem, &info); in sl28vpd_add_cells()
153 MODULE_DESCRIPTION("NVMEM layout driver for the VPD of Kontron sl28 boards");

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