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i2c: buses: nvvrs11: Copy driver from kernel/nvidia
Make the copy of drivers of i2c/busses/i2c-nvvrs11 from kernel/nvidia to kernel/nvidia-oot. This will remove the dependency of the OOT drivers with kernel/nvidia-oot repo. Bug 4038415 Change-Id: I3353f2744915763c3e5f14164746fc540cd585dc Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com> Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/2881573 Tested-by: mobile promotions <svcmobile_promotions@nvidia.com> Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
This commit is contained in:
Laxman Dewangan
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0221df9441
commit
cf15a1f3df
347
drivers/i2c/busses/i2c-nvvrs11.c
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347
drivers/i2c/busses/i2c-nvvrs11.c
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@@ -0,0 +1,347 @@
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// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Voltage Regulator Specification: VRS11 High Current Voltage Regulator
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*
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* Copyright (C) 2022-2023 NVIDIA CORPORATION. All rights reserved.
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*/
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#include <linux/i2c.h>
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#include <linux/i2c-nvvrs11.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/of.h>
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#include <linux/of_device.h>
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#include <linux/regmap.h>
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#include <linux/slab.h>
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#include <linux/err.h>
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#include <linux/version.h>
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#define VOLTAGE_OFFSET 200 // 0.2V
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#define VOLTAGE_SCALE 5 // 5mV
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static const struct regmap_range nvvrs11_readable_ranges[] = {
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regmap_reg_range(NVVRS11_REG_VENDOR_ID, NVVRS11_REG_MODEL_REV),
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regmap_reg_range(NVVRS11_REG_VOUT_A, NVVRS11_REG_TEMP_B),
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};
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static const struct regmap_access_table nvvrs11_readable_table = {
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.yes_ranges = nvvrs11_readable_ranges,
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.n_yes_ranges = ARRAY_SIZE(nvvrs11_readable_ranges),
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};
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static const struct regmap_config nvvrs11_regmap_config = {
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.name = "nvvrs11",
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.reg_bits = 8,
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.val_bits = 8,
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.max_register = NVVRS11_REG_TEMP_B + 1,
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.cache_type = REGCACHE_RBTREE,
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.rd_table = &nvvrs11_readable_table,
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};
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static ssize_t show_loopA_rail_name(struct device *dev,
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struct device_attribute *devattr, char *buf)
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{
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struct nvvrs11_chip *nvvrs_chip = dev_get_drvdata(dev);
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return sprintf(buf, "%s\n", nvvrs_chip->loopA_rail_name);
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}
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static ssize_t show_loopA_rail_voltage(struct device *dev,
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struct device_attribute *devattr, char *buf)
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{
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struct nvvrs11_chip *nvvrs_chip = dev_get_drvdata(dev);
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int voltage_A;
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voltage_A = i2c_smbus_read_byte_data(nvvrs_chip->client, NVVRS11_REG_VOUT_A);
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if (voltage_A < 0)
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return voltage_A;
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voltage_A *= VOLTAGE_SCALE;
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voltage_A += VOLTAGE_OFFSET;
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return sprintf(buf, "%u mV\n", voltage_A);
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}
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static ssize_t show_loopA_rail_current(struct device *dev,
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struct device_attribute *devattr, char *buf)
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{
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struct nvvrs11_chip *nvvrs_chip = dev_get_drvdata(dev);
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int current_A;
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current_A = i2c_smbus_read_byte_data(nvvrs_chip->client, NVVRS11_REG_IOUT_A);
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if (current_A < 0)
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return current_A;
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return sprintf(buf, "%u A\n", current_A);
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}
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static ssize_t show_loopA_rail_power(struct device *dev,
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struct device_attribute *devattr, char *buf)
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{
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struct nvvrs11_chip *nvvrs_chip = dev_get_drvdata(dev);
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unsigned int power;
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int voltage_A;
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int current_A;
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voltage_A = i2c_smbus_read_byte_data(nvvrs_chip->client, NVVRS11_REG_VOUT_A);
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if (voltage_A < 0)
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return voltage_A;
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voltage_A *= VOLTAGE_SCALE;
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voltage_A += VOLTAGE_OFFSET;
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current_A = i2c_smbus_read_byte_data(nvvrs_chip->client, NVVRS11_REG_IOUT_A);
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if (current_A < 0)
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return current_A;
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power = (voltage_A * current_A)/1000;
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return sprintf(buf, "%u W\n", power);
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}
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static ssize_t show_loopB_rail_name(struct device *dev,
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struct device_attribute *devattr, char *buf)
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{
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struct nvvrs11_chip *nvvrs_chip = dev_get_drvdata(dev);
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return sprintf(buf, "%s\n", nvvrs_chip->loopB_rail_name);
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}
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static ssize_t show_loopB_rail_voltage(struct device *dev,
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struct device_attribute *devattr, char *buf)
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{
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struct nvvrs11_chip *nvvrs_chip = dev_get_drvdata(dev);
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int voltage_B;
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voltage_B = i2c_smbus_read_byte_data(nvvrs_chip->client, NVVRS11_REG_VOUT_B);
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if (voltage_B < 0)
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return voltage_B;
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voltage_B *= VOLTAGE_SCALE;
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voltage_B += VOLTAGE_OFFSET;
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return sprintf(buf, "%u mV\n", voltage_B);
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}
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static ssize_t show_loopB_rail_current(struct device *dev,
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struct device_attribute *devattr, char *buf)
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{
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struct nvvrs11_chip *nvvrs_chip = dev_get_drvdata(dev);
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int current_B;
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current_B = i2c_smbus_read_byte_data(nvvrs_chip->client, NVVRS11_REG_IOUT_B);
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if (current_B < 0)
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return current_B;
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return sprintf(buf, "%u A\n", current_B);
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}
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static ssize_t show_loopB_rail_power(struct device *dev,
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struct device_attribute *devattr, char *buf)
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{
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struct nvvrs11_chip *nvvrs_chip = dev_get_drvdata(dev);
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unsigned int power;
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int voltage_B;
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int current_B;
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voltage_B = i2c_smbus_read_byte_data(nvvrs_chip->client, NVVRS11_REG_VOUT_B);
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if (voltage_B < 0)
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return voltage_B;
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voltage_B *= VOLTAGE_SCALE;
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voltage_B += VOLTAGE_OFFSET;
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current_B = i2c_smbus_read_byte_data(nvvrs_chip->client, NVVRS11_REG_IOUT_B);
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if (current_B < 0)
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return current_B;
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power = (voltage_B * current_B)/1000;
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return sprintf(buf, "%u W\n", power);
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}
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static DEVICE_ATTR(loopA_rail_name, S_IRUGO, show_loopA_rail_name, NULL);
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static DEVICE_ATTR(loopA_rail_voltage, S_IRUGO, show_loopA_rail_voltage, NULL);
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static DEVICE_ATTR(loopA_rail_current, S_IRUGO, show_loopA_rail_current, NULL);
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static DEVICE_ATTR(loopA_rail_power, S_IRUGO, show_loopA_rail_power, NULL);
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static DEVICE_ATTR(loopB_rail_name, S_IRUGO, show_loopB_rail_name, NULL);
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static DEVICE_ATTR(loopB_rail_voltage, S_IRUGO, show_loopB_rail_voltage, NULL);
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static DEVICE_ATTR(loopB_rail_current, S_IRUGO, show_loopB_rail_current, NULL);
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static DEVICE_ATTR(loopB_rail_power, S_IRUGO, show_loopB_rail_power, NULL);
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static struct attribute *nvvrs11_attr[] = {
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&dev_attr_loopA_rail_name.attr,
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&dev_attr_loopA_rail_voltage.attr,
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&dev_attr_loopA_rail_current.attr,
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&dev_attr_loopA_rail_power.attr,
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&dev_attr_loopB_rail_name.attr,
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&dev_attr_loopB_rail_voltage.attr,
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&dev_attr_loopB_rail_current.attr,
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&dev_attr_loopB_rail_power.attr,
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NULL
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};
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static const struct attribute_group nvvrs11_attr_group = {
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.attrs = nvvrs11_attr,
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};
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static int nvvrs11_create_sys_files(struct device *dev)
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{
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return sysfs_create_group(&dev->kobj, &nvvrs11_attr_group);
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}
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static void nvvrs11_delete_sys_files(struct device *dev)
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{
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return sysfs_remove_group(&dev->kobj, &nvvrs11_attr_group);
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}
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static int nvvrs11_vendor_info(struct nvvrs11_chip *chip)
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{
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struct i2c_client *client = chip->client;
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int vendor_id, model_rev;
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vendor_id = i2c_smbus_read_byte_data(client, NVVRS11_REG_VENDOR_ID);
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if (vendor_id < 0) {
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dev_err(chip->dev, "Failed to read Vendor ID: %d\n", vendor_id);
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return -EINVAL;
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}
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dev_info(chip->dev, "NVVRS11 Vendor ID: 0x%X \n", vendor_id);
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model_rev = i2c_smbus_read_byte_data(client, NVVRS11_REG_MODEL_REV);
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if (model_rev < 0) {
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dev_err(chip->dev, "Failed to read Model Rev: %d\n", model_rev);
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return -EINVAL;
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}
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dev_info(chip->dev, "NVVRS11 Model Rev: 0x%X\n", model_rev);
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return 0;
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}
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#if KERNEL_VERSION(6, 3, 0) <= LINUX_VERSION_CODE
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static int nvvrs11_probe(struct i2c_client *client)
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#else
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static int nvvrs11_probe(struct i2c_client *client,
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const struct i2c_device_id *id)
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#endif
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{
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const struct regmap_config *rmap_config;
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struct nvvrs11_chip *nvvrs_chip;
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struct device *dev = &client->dev;
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struct device_node *np = dev->of_node;
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int ret;
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nvvrs_chip = devm_kzalloc(&client->dev, sizeof(*nvvrs_chip), GFP_KERNEL);
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if (!nvvrs_chip)
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return -ENOMEM;
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/* Set PEC flag for SMBUS transfer with PEC enabled */
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client->flags |= I2C_CLIENT_PEC;
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i2c_set_clientdata(client, nvvrs_chip);
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nvvrs_chip->client = client;
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nvvrs_chip->dev = &client->dev;
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rmap_config = &nvvrs11_regmap_config;
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nvvrs_chip->rmap = devm_regmap_init_i2c(client, rmap_config);
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if (IS_ERR(nvvrs_chip->rmap)) {
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ret = PTR_ERR(nvvrs_chip->rmap);
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dev_err(nvvrs_chip->dev, "Failed to initialise regmap: %d\n", ret);
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return ret;
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}
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/* Read device tree node info */
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nvvrs_chip->loopA_rail_name = of_get_property(np, "rail-name-loopA", NULL);
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if (!(nvvrs_chip->loopA_rail_name)) {
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dev_info(nvvrs_chip->dev, "loopA rail does not exist\n");
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nvvrs_chip->loopA_rail_name = "LoopA";
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}
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nvvrs_chip->loopB_rail_name = of_get_property(np, "rail-name-loopB", NULL);
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if (!(nvvrs_chip->loopB_rail_name)) {
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dev_info(nvvrs_chip->dev, "loopB rail does not exist\n");
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nvvrs_chip->loopB_rail_name = "LoopB";
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}
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ret = nvvrs11_create_sys_files(nvvrs_chip->dev);
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if (ret) {
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dev_err(nvvrs_chip->dev, "Failed to add sysfs entries: %d\n", ret);
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return ret;
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}
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ret = nvvrs11_vendor_info(nvvrs_chip);
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if (ret < 0) {
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dev_err(nvvrs_chip->dev, "Failed to read vendor info: %d\n", ret);
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goto exit;
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}
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dev_info(nvvrs_chip->dev, "NVVRS11 probe successful");
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return 0;
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exit:
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nvvrs11_delete_sys_files(nvvrs_chip->dev);
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dev_info(nvvrs_chip->dev, "NVVRS11 probe failed");
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return ret;
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}
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#if KERNEL_VERSION(6, 1, 0) <= LINUX_VERSION_CODE
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static void nvvrs11_remove(struct i2c_client *client)
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{
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nvvrs11_delete_sys_files(&client->dev);
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}
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#else
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static int nvvrs11_remove(struct i2c_client *client)
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{
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nvvrs11_delete_sys_files(&client->dev);
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return 0;
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}
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#endif
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#ifdef CONFIG_PM_SLEEP
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static int nvvrs11_i2c_suspend(struct device *dev)
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{
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return 0;
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}
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static int nvvrs11_i2c_resume(struct device *dev)
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{
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return 0;
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}
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#endif
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static const struct dev_pm_ops nvvrs11_pm_ops = {
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SET_SYSTEM_SLEEP_PM_OPS(nvvrs11_i2c_suspend, nvvrs11_i2c_resume)
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};
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static const struct of_device_id nvvrs_dt_match[] = {
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{ .compatible = "nvidia,vrs11" },
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{}
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};
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MODULE_DEVICE_TABLE(of, nvvrs_dt_match);
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static struct i2c_driver nvvrs11_driver = {
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.driver = {
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.name = "nvvrs11",
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.pm = &nvvrs11_pm_ops,
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.of_match_table = of_match_ptr(nvvrs_dt_match),
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},
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.probe = nvvrs11_probe,
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.remove = nvvrs11_remove,
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};
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static int __init nvvrs11_init(void)
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{
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return i2c_add_driver(&nvvrs11_driver);
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}
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module_init(nvvrs11_init);
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static void __exit nvvrs11_exit(void)
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{
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i2c_del_driver(&nvvrs11_driver);
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}
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module_exit(nvvrs11_exit);
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MODULE_DESCRIPTION("Nvidia VRS11: High Current Voltage Regulator Spec");
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MODULE_AUTHOR("Shubhi Garg <shgarg@nvidia.com>");
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MODULE_ALIAS("i2c:nvvrs11");
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MODULE_LICENSE("GPL v2");
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37
include/linux/i2c-nvvrs11.h
Normal file
37
include/linux/i2c-nvvrs11.h
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@@ -0,0 +1,37 @@
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/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Defining registers address and its bit definitions of NVVRS11
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*
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* Copyright (C) 2022-2023 NVIDIA CORPORATION. All rights reserved.
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*/
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#ifndef _LINUX_I2C_NVVRS11_H_
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#define _LINUX_I2C_NVVRS11_H_
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#include <linux/types.h>
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/* Vendor ID */
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#define NVVRS11_REG_VENDOR_ID 0x00
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#define NVVRS11_REG_MODEL_REV 0x01
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/* Voltage Output registers */
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#define NVVRS11_REG_VOUT_A 0x30
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#define NVVRS11_REG_VOUT_B 0x33
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/* Current Output registers */
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#define NVVRS11_REG_IOUT_A 0x31
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#define NVVRS11_REG_IOUT_B 0x34
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/* Temperature registers */
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#define NVVRS11_REG_TEMP_A 0x32
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#define NVVRS11_REG_TEMP_B 0x35
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struct nvvrs11_chip {
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struct device *dev;
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struct regmap *rmap;
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struct i2c_client *client;
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const char *loopA_rail_name;
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const char *loopB_rail_name;
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};
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#endif /* _LINUX_I2C_NVVRS11_H_ */
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@@ -67,7 +67,3 @@ nvidia/drivers/video/tegra/dc/bridge/maxim_gmsl_dp_serializer.c drivers/video/te
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# Files/directory for TI FPDLink DP serializer
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nvidia/drivers/video/tegra/dc/bridge/ti_fpdlink_dp_serializer.c drivers/video/tegra/dc/bridge
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# Files/directory for NVIDIA I2C VRS11
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nvidia/drivers/i2c/busses/i2c-nvvrs11.c drivers/i2c/busses/i2c-nvvrs11.c
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nvidia/include/linux/i2c-nvvrs11.h include/linux/i2c-nvvrs11.h
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