nct7802y_peci.c

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/* SPDX-License-Identifier: GPL-2.0-only */
 
#include <types.h>
#include <device/device.h>
 
#include "nct7802y.h"
#include "chip.h"
 
void nct7802y_init_peci(struct device *const dev)
{
        const struct drivers_i2c_nct7802y_config *const config = dev->chip_info;
        unsigned int i, all_off = 1;
 
        /* Bank 1 can only be written to if PECI reading is enabled */
        if (nct7802y_select_bank(dev, 0) != CB_SUCCESS)
                return;
        nct7802y_update(dev, PECI_ENABLE, 0, PECI_ENABLE_AGENTx(0));
 
        if (nct7802y_select_bank(dev, 1) != CB_SUCCESS)
                return;
 
        for (i = 0; i < NCT7802Y_PECI_CNT; ++i) {
                if (config->peci[i].mode != PECI_DISABLED) {
                        u8 ctrl3 = 0, style = 0;
                        switch (config->peci[i].mode) {
                        case PECI_DOMAIN_0:
                                ctrl3 = PECI_CTRL_3_EN_AGENTx(i);
                                style = PECI_TEMP_STYLE_DOM0_AGENTx(i) |
                                        PECI_TEMP_STYLE_SINGLE;
                                break;
                        case PECI_DOMAIN_1:
                                ctrl3 = PECI_CTRL_3_EN_AGENTx(i) |
                                        PECI_CTRL_3_HAS_DOM1_AGENTx(i);
                                style = PECI_TEMP_STYLE_DOM1_AGENTx(i) |
                                        PECI_TEMP_STYLE_SINGLE;
                                break;
                        case PECI_HIGHEST:
                                ctrl3 = PECI_CTRL_3_EN_AGENTx(i) |
                                        PECI_CTRL_3_HAS_DOM1_AGENTx(i);
                                style = PECI_TEMP_STYLE_HIGHEST;
                                break;
                        default:
                                break;
                        }
                        nct7802y_update(dev, PECI_CTRL_1,
                                        PECI_CTRL_1_MANUAL_EN,
                                        PECI_CTRL_1_EN |
                                                PECI_CTRL_1_ROUTINE_EN);
                        nct7802y_update(dev, PECI_CTRL_3,
                                        PECI_CTRL_3_HAS_DOM1_AGENTx(i), ctrl3);
                        nct7802y_update(dev, PECI_REPORT_TEMP_STYLE,
                                        PECI_TEMP_STYLE_DOM1_AGENTx(i) |
                                                PECI_TEMP_STYLE_HIGHEST,
                                        style);
                        nct7802y_write(dev, PECI_BASE_TEMP_AGENT(i),
                                       config->peci[i].base_temp);
                        all_off = 0;
                } else {
                        nct7802y_update(dev, PECI_CTRL_3,
                                        PECI_CTRL_3_EN_AGENTx(i), 0);
                }
        }
 
        if (all_off)
                nct7802y_update(dev, PECI_CTRL_1, PECI_CTRL_1_EN, 0);
 
        /* Disable PECI #0 reading if we only enabled it to access bank 1 */
        if (config->peci[0].mode == PECI_DISABLED) {
                if (nct7802y_select_bank(dev, 0) != CB_SUCCESS)
                        return;
 
                nct7802y_update(dev, PECI_ENABLE, PECI_ENABLE_AGENTx(0), 0);
        }
}