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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2020, Linaro Limited
*/
#include <common.h>
#include <clk.h>
#include <dm.h>
#include <malloc.h>
#include <reset.h>
#include <asm/io.h>
#include <asm/scmi_test.h>
#include <dm/device_compat.h>
/*
* Simulate to some extent a SCMI exchange.
* This drivers gets SCMI resources and offers API function to the
* SCMI test sequence manipulate the resources, currently clock
* and reset controllers.
*/
#define SCMI_TEST_DEVICES_CLK_COUNT 3
#define SCMI_TEST_DEVICES_RD_COUNT 1
/*
* struct sandbox_scmi_device_priv - Storage for device handles used by test
* @clk: Array of clock instances used by tests
* @reset_clt: Array of the reset controller instances used by tests
* @devices: Resources exposed by sandbox_scmi_devices_ctx()
*/
struct sandbox_scmi_device_priv {
struct clk clk[SCMI_TEST_DEVICES_CLK_COUNT];
struct reset_ctl reset_ctl[SCMI_TEST_DEVICES_RD_COUNT];
struct sandbox_scmi_devices devices;
};
struct sandbox_scmi_devices *sandbox_scmi_devices_ctx(struct udevice *dev)
{
struct sandbox_scmi_device_priv *priv = dev_get_priv(dev);
if (priv)
return &priv->devices;
return NULL;
}
static int sandbox_scmi_devices_remove(struct udevice *dev)
{
struct sandbox_scmi_devices *devices = sandbox_scmi_devices_ctx(dev);
int ret = 0;
size_t n;
if (!devices)
return 0;
for (n = 0; n < SCMI_TEST_DEVICES_RD_COUNT; n++) {
int ret2 = reset_free(devices->reset + n);
if (ret2 && !ret)
ret = ret2;
}
return ret;
}
static int sandbox_scmi_devices_probe(struct udevice *dev)
{
struct sandbox_scmi_device_priv *priv = dev_get_priv(dev);
int ret;
size_t n;
priv->devices = (struct sandbox_scmi_devices){
.clk = priv->clk,
.clk_count = SCMI_TEST_DEVICES_CLK_COUNT,
.reset = priv->reset_ctl,
.reset_count = SCMI_TEST_DEVICES_RD_COUNT,
};
for (n = 0; n < SCMI_TEST_DEVICES_CLK_COUNT; n++) {
ret = clk_get_by_index(dev, n, priv->devices.clk + n);
if (ret) {
dev_err(dev, "%s: Failed on clk %zu\n", __func__, n);
return ret;
}
}
for (n = 0; n < SCMI_TEST_DEVICES_RD_COUNT; n++) {
ret = reset_get_by_index(dev, n, priv->devices.reset + n);
if (ret) {
dev_err(dev, "%s: Failed on reset %zu\n", __func__, n);
goto err_reset;
}
}
return 0;
err_reset:
for (; n > 0; n--)
reset_free(priv->devices.reset + n - 1);
return ret;
}
static const struct udevice_id sandbox_scmi_devices_ids[] = {
{ .compatible = "sandbox,scmi-devices" },
{ }
};
U_BOOT_DRIVER(sandbox_scmi_devices) = {
.name = "sandbox-scmi_devices",
.id = UCLASS_MISC,
.of_match = sandbox_scmi_devices_ids,
.priv_auto = sizeof(struct sandbox_scmi_device_priv),
.remove = sandbox_scmi_devices_remove,
.probe = sandbox_scmi_devices_probe,
};
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