struct nvmem_cell_info表示一个cell: structnvmem_cell_info {constchar*name;--名称。unsignedintoffset;--byte为单位的偏移。unsignedintbytes;--byte为单位的长度。unsignedintbit_offset;--bit为单位的偏移。unsignedintnbits;--bit为单位的长度。}; 获取struct device后,根据cell名称进行操作,获取cell: struct...
nvmem-cell-names ="part_number";#cooling-cells = <2>;}; }; cpu0_opp_table: cpu0-opp-table { compatible ="operating-points-v2"; opp-shared; }; ... spi2: spi@4000b000 {#address-cells = <1>;#size-cells = <0>;compatible ="st,stm32h7-spi"; reg = <0x4000b000 0x400>; ...
1007 nvmem-cells = <&soc_revision>;1008 nvmem-cell-names = "soc_revision";…… 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 第1006行定义了ranges属性,但是ranges属性值为空。 ranges属性不为空的示例代码如下所示: 示例代码20.3.4.6 ranges属性不为空 1 soc {2 ...
NVMe与PCl的关系 手把手实现spdk_ server nvme与pcie以及手写nvme读写操作 bdev与blob之间的关系 实现blob异步读写 blobstore的读写操作实现与rpc的关系 fio性能测试性能对比libaio,io_ uring,psync fio plugin工作流程 fio plugin开发 (2)spdk文件系统的实现 文件系统功能拆解 spdk_ env_ init与spdk_ app init的差...
3.120M bits/s的转发速率 (4)fio 1.ioengine的实现 2.ioengine_ ops的分析 3.iodepth的分析 4.spdk_ nvme的fio分析 5.spdk_ bdev的fio分析 6.spdk_ blob的ioengine实现 7.psync,io_ uring, libaio性能对比 6.性能测试专栏 (1)性能指标 1.吞吐量bps 2.拆链/建链pps 3.并发 4.最大时延 5.最小时...
Miquèl Raynalcontributed many changes to the 802.15.4 Linux stack, mainly to add support for device association Miquèl also contributed asysfsinterface to the NVMEM subsystem, which allows to access the contents of NVMEM cells from sysfs
Kernel/DTB storage locationsSD card, eMMC, USB, NVMe TFTP with DHCP or static IP; configured by CBO device tree file Next stage storage locationCold boot: eMMC RCM boot: Downloaded over USB recovery port Next stageKernel Storage device supporteMMC, SD card, & USB drive with hub support ...
static struct nvmem_device *nvmem_find(const char *name) { struct device *d; d = bus_find_device_by_name(&nvmem_bus_type, NULL, name); if (!d) return NULL; return to_nvmem_device(d); } static void nvmem_cell_drop(struct nvmem_cell *cell) { blocking_notifier_call_chain(&nv...
static int sun50i_ephy_get_calibrate(struct device *dev) { struct nvmem_cell *calcell; uint16_t *caldata; size_t callen; int ret = 0; calcell = devm_nvmem_cell_get(dev, "calibration"); if (IS_ERR(calcell)) { dev_err_probe(dev, PTR_ERR(calcell), "Failed to get calibration...
Get current register value in device using devmem tool: Install devmem. $sudoapt-getinstallbusybox$busyboxdevmem<32-bitaddress> For example,devmem0x02430080. To use pin as GPIO, update following fields in the PADCTL register: Find register information from the Pinmux Regis...