ec.c

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/* SPDX-License-Identifier: GPL-2.0-only */
 
#include <console/console.h>
#include <device/device.h>
#include <device/pnp.h>
#include <pc80/keyboard.h>
#include <ec/acpi/ec.h>
#include <delay.h>
 
#include "chip.h"
 
static void it8518_init(struct device *dev)
{
        const struct ec_roda_it8518_config *const conf = dev->chip_info;
 
        if (!dev->enabled)
                return;
 
        printk(BIOS_DEBUG, "Roda IT8518: Initializing keyboard.\n");
        pc_keyboard_init(NO_AUX_DEVICE);
 
        if (conf && conf->cpuhot_limit) {
                /* The EC may take very long for the first command on a
                   cold boot (~180ms witnessed). Since we need an incre-
                   dibly long timeout, we do this EC RAM write manually. */
                int timeout = 50000;    /* 50,000 * 10us = 500ms */
                send_ec_command(0x81);
                while (ec_status() & EC_IBF && --timeout)
                        udelay(10);
                send_ec_data(0xb2);
                send_ec_data(conf->cpuhot_limit);
        }
}
 
static struct device_operations ops = {
        .init             = it8518_init,
        .read_resources   = noop_read_resources,
        .set_resources    = noop_set_resources,
};
 
static struct pnp_info pnp_dev_info[] = {
        { NULL, 0, 0, 0, }
};
 
static void enable_dev(struct device *dev)
{
        pnp_enable_devices(dev, &ops, ARRAY_SIZE(pnp_dev_info), pnp_dev_info);
}
 
struct chip_operations ec_roda_it8518_ops = {
        CHIP_NAME("Roda IT8518 EC")
        .enable_dev = enable_dev
};