[PATCH v3 2/4] firmware: scmi: sandbox test for voltage regulator
Etienne Carriere
etienne.carriere at linaro.org
Mon Feb 22 08:27:45 CET 2021
Implement sandbox regulator devices for SCMI voltage domains
and test them in DM scmi tests.
Signed-off-by: Etienne Carriere <etienne.carriere at linaro.org>
Reviewed-by: Simon Glass <sjg at chromium.org>
Reviewed-by: Jaehoon Chung <jh80.chung at samsung.com>
---
Changes in v3:
- applied review tags
Changes in v2:
- don't test IS_ENABLED(CONFIG_DM_REGULATOR_SCMI) in test/dm/scmi.c,
it's expected enabled when CONFIG_FIRMWARE_SCMI is enabled in sandbox.
---
arch/sandbox/dts/test.dts | 23 +++
arch/sandbox/include/asm/scmi_test.h | 20 ++
configs/sandbox_defconfig | 1 +
drivers/firmware/scmi/sandbox-scmi_agent.c | 203 ++++++++++++++++++-
drivers/firmware/scmi/sandbox-scmi_devices.c | 25 ++-
test/dm/scmi.c | 58 ++++++
6 files changed, 327 insertions(+), 3 deletions(-)
diff --git a/arch/sandbox/dts/test.dts b/arch/sandbox/dts/test.dts
index e95f4631b..14d6983e7 100644
--- a/arch/sandbox/dts/test.dts
+++ b/arch/sandbox/dts/test.dts
@@ -451,6 +451,27 @@
reg = <0x16>;
#reset-cells = <1>;
};
+
+ protocol at 17 {
+ reg = <0x17>;
+
+ regulators {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ regul0_scmi0: reg at 0 {
+ reg = <0>;
+ regulator-name = "sandbox-voltd0";
+ regulator-min-microvolt = <1100000>;
+ regulator-max-microvolt = <3300000>;
+ };
+ regul1_scmi0: reg at 1 {
+ reg = <0x1>;
+ regulator-name = "sandbox-voltd1";
+ regulator-min-microvolt = <1800000>;
+ };
+ };
+ };
};
sandbox-scmi-agent at 1 {
@@ -1217,6 +1238,8 @@
compatible = "sandbox,scmi-devices";
clocks = <&clk_scmi0 7>, <&clk_scmi0 3>, <&clk_scmi1 1>;
resets = <&reset_scmi0 3>;
+ regul0-supply = <®ul0_scmi0>;
+ regul1-supply = <®ul1_scmi0>;
};
pinctrl {
diff --git a/arch/sandbox/include/asm/scmi_test.h b/arch/sandbox/include/asm/scmi_test.h
index 3e8b0068f..9b7031531 100644
--- a/arch/sandbox/include/asm/scmi_test.h
+++ b/arch/sandbox/include/asm/scmi_test.h
@@ -31,6 +31,18 @@ struct sandbox_scmi_reset {
bool asserted;
};
+/**
+ * struct sandbox_scmi_voltd - Simulated voltage regulator exposed by SCMI
+ * @id: Identifier of the voltage domain used in the SCMI protocol
+ * @enabled: Regulator state: true if on, false if off
+ * @voltage_uv: Regulator current voltage in microvoltd (uV)
+ */
+struct sandbox_scmi_voltd {
+ uint id;
+ bool enabled;
+ int voltage_uv;
+};
+
/**
* struct sandbox_scmi_agent - Simulated SCMI service seen by SCMI agent
* @idx: Identifier for the SCMI agent, its index
@@ -38,6 +50,8 @@ struct sandbox_scmi_reset {
* @clk_count: Simulated clocks array size
* @clk: Simulated reset domains
* @clk_count: Simulated reset domains array size
+ * @voltd: Simulated voltage domains (regulators)
+ * @voltd_count: Simulated voltage domains array size
*/
struct sandbox_scmi_agent {
uint idx;
@@ -45,6 +59,8 @@ struct sandbox_scmi_agent {
size_t clk_count;
struct sandbox_scmi_reset *reset;
size_t reset_count;
+ struct sandbox_scmi_voltd *voltd;
+ size_t voltd_count;
};
/**
@@ -63,12 +79,16 @@ struct sandbox_scmi_service {
* @clk_count: Number of clock devices probed
* @reset: Array the reset controller devices
* @reset_count: Number of reset controller devices probed
+ * @regul: Array regulator devices
+ * @regul_count: Number of regulator devices probed
*/
struct sandbox_scmi_devices {
struct clk *clk;
size_t clk_count;
struct reset_ctl *reset;
size_t reset_count;
+ struct udevice **regul;
+ size_t regul_count;
};
#ifdef CONFIG_SCMI_FIRMWARE
diff --git a/configs/sandbox_defconfig b/configs/sandbox_defconfig
index 0c7674efc..790158445 100644
--- a/configs/sandbox_defconfig
+++ b/configs/sandbox_defconfig
@@ -214,6 +214,7 @@ CONFIG_DM_REGULATOR_FIXED=y
CONFIG_REGULATOR_RK8XX=y
CONFIG_REGULATOR_S5M8767=y
CONFIG_DM_REGULATOR_SANDBOX=y
+CONFIG_DM_REGULATOR_SCMI=y
CONFIG_REGULATOR_TPS65090=y
CONFIG_DM_PWM=y
CONFIG_PWM_SANDBOX=y
diff --git a/drivers/firmware/scmi/sandbox-scmi_agent.c b/drivers/firmware/scmi/sandbox-scmi_agent.c
index 35de68c75..3eafc49bd 100644
--- a/drivers/firmware/scmi/sandbox-scmi_agent.c
+++ b/drivers/firmware/scmi/sandbox-scmi_agent.c
@@ -19,14 +19,15 @@
* SCMI protocols embedded in U-Boot. Currently:
* - SCMI clock protocol: emulate 2 agents each exposing few clocks
* - SCMI reset protocol: emulate 1 agents each exposing a reset
+ * - SCMI voltage domain protocol: emulate 1 agent exposing 2 regulators
*
- * Agent #0 simulates 2 clocks and 1 reset domain.
+ * Agent #0 simulates 2 clocks, 1 reset domain and 1 voltage domain.
* See IDs in scmi0_clk[]/scmi0_reset[] and "sandbox-scmi-agent at 0" in test.dts.
*
* Agent #1 simulates 1 clock.
* See IDs in scmi1_clk[] and "sandbox-scmi-agent at 1" in test.dts.
*
- * All clocks are default disabled and reset levels down.
+ * All clocks and regulators are default disabled and reset controller down.
*
* This Driver exports sandbox_scmi_service_ct() for the test sequence to
* get the state of the simulated services (clock state, rate, ...) and
@@ -45,6 +46,11 @@ static struct sandbox_scmi_reset scmi0_reset[] = {
{ .id = 3 },
};
+static struct sandbox_scmi_voltd scmi0_voltd[] = {
+ { .id = 0, .voltage_uv = 3300000 },
+ { .id = 1, .voltage_uv = 1800000 },
+};
+
static struct sandbox_scmi_clk scmi1_clk[] = {
{ .id = 1, .rate = 44 },
};
@@ -81,6 +87,13 @@ static void debug_print_agent_state(struct udevice *dev, char *str)
agent->reset_count,
agent->reset_count ? agent->reset[0].asserted : -1,
agent->reset_count > 1 ? agent->reset[1].asserted : -1);
+ dev_dbg(dev, " scmi%u_voltd (%zu): %u/%d, %u/%d, ...\n",
+ agent->idx,
+ agent->voltd_count,
+ agent->voltd_count ? agent->voltd[0].enabled : -1,
+ agent->voltd_count ? agent->voltd[0].voltage_uv : -1,
+ agent->voltd_count ? agent->voltd[1].enabled : -1,
+ agent->voltd_count ? agent->voltd[1].voltage_uv : -1);
};
static struct sandbox_scmi_clk *get_scmi_clk_state(uint agent_id, uint clock_id)
@@ -123,6 +136,20 @@ static struct sandbox_scmi_reset *get_scmi_reset_state(uint agent_id,
return NULL;
}
+static struct sandbox_scmi_voltd *get_scmi_voltd_state(uint agent_id,
+ uint domain_id)
+{
+ size_t n;
+
+ if (agent_id == 0) {
+ for (n = 0; n < ARRAY_SIZE(scmi0_voltd); n++)
+ if (scmi0_voltd[n].id == domain_id)
+ return scmi0_voltd + n;
+ }
+
+ return NULL;
+}
+
/*
* Sandbox SCMI agent ops
*/
@@ -290,6 +317,160 @@ static int sandbox_scmi_rd_reset(struct udevice *dev, struct scmi_msg *msg)
return 0;
}
+static int sandbox_scmi_voltd_attribs(struct udevice *dev, struct scmi_msg *msg)
+{
+ struct sandbox_scmi_agent *agent = dev_get_priv(dev);
+ struct scmi_voltd_attr_in *in = NULL;
+ struct scmi_voltd_attr_out *out = NULL;
+ struct sandbox_scmi_voltd *voltd_state = NULL;
+
+ if (!msg->in_msg || msg->in_msg_sz < sizeof(*in) ||
+ !msg->out_msg || msg->out_msg_sz < sizeof(*out))
+ return -EINVAL;
+
+ in = (struct scmi_voltd_attr_in *)msg->in_msg;
+ out = (struct scmi_voltd_attr_out *)msg->out_msg;
+
+ voltd_state = get_scmi_voltd_state(agent->idx, in->domain_id);
+ if (!voltd_state) {
+ dev_err(dev, "Unexpected domain ID %u\n", in->domain_id);
+
+ out->status = SCMI_NOT_FOUND;
+ } else {
+ memset(out, 0, sizeof(*out));
+ snprintf(out->name, sizeof(out->name), "regu%u", in->domain_id);
+
+ out->status = SCMI_SUCCESS;
+ }
+
+ return 0;
+}
+
+static int sandbox_scmi_voltd_config_set(struct udevice *dev,
+ struct scmi_msg *msg)
+{
+ struct sandbox_scmi_agent *agent = dev_get_priv(dev);
+ struct scmi_voltd_config_set_in *in = NULL;
+ struct scmi_voltd_config_set_out *out = NULL;
+ struct sandbox_scmi_voltd *voltd_state = NULL;
+
+ if (!msg->in_msg || msg->in_msg_sz < sizeof(*in) ||
+ !msg->out_msg || msg->out_msg_sz < sizeof(*out))
+ return -EINVAL;
+
+ in = (struct scmi_voltd_config_set_in *)msg->in_msg;
+ out = (struct scmi_voltd_config_set_out *)msg->out_msg;
+
+ voltd_state = get_scmi_voltd_state(agent->idx, in->domain_id);
+ if (!voltd_state) {
+ dev_err(dev, "Unexpected domain ID %u\n", in->domain_id);
+
+ out->status = SCMI_NOT_FOUND;
+ } else if (in->config & ~SCMI_VOLTD_CONFIG_MASK) {
+ dev_err(dev, "Invalid config value 0x%x\n", in->config);
+
+ out->status = SCMI_INVALID_PARAMETERS;
+ } else if (in->config != SCMI_VOLTD_CONFIG_ON &&
+ in->config != SCMI_VOLTD_CONFIG_OFF) {
+ dev_err(dev, "Unexpected custom value 0x%x\n", in->config);
+
+ out->status = SCMI_INVALID_PARAMETERS;
+ } else {
+ voltd_state->enabled = in->config == SCMI_VOLTD_CONFIG_ON;
+ out->status = SCMI_SUCCESS;
+ }
+
+ return 0;
+}
+
+static int sandbox_scmi_voltd_config_get(struct udevice *dev,
+ struct scmi_msg *msg)
+{
+ struct sandbox_scmi_agent *agent = dev_get_priv(dev);
+ struct scmi_voltd_config_get_in *in = NULL;
+ struct scmi_voltd_config_get_out *out = NULL;
+ struct sandbox_scmi_voltd *voltd_state = NULL;
+
+ if (!msg->in_msg || msg->in_msg_sz < sizeof(*in) ||
+ !msg->out_msg || msg->out_msg_sz < sizeof(*out))
+ return -EINVAL;
+
+ in = (struct scmi_voltd_config_get_in *)msg->in_msg;
+ out = (struct scmi_voltd_config_get_out *)msg->out_msg;
+
+ voltd_state = get_scmi_voltd_state(agent->idx, in->domain_id);
+ if (!voltd_state) {
+ dev_err(dev, "Unexpected domain ID %u\n", in->domain_id);
+
+ out->status = SCMI_NOT_FOUND;
+ } else {
+ if (voltd_state->enabled)
+ out->config = SCMI_VOLTD_CONFIG_ON;
+ else
+ out->config = SCMI_VOLTD_CONFIG_OFF;
+
+ out->status = SCMI_SUCCESS;
+ }
+
+ return 0;
+}
+
+static int sandbox_scmi_voltd_level_set(struct udevice *dev,
+ struct scmi_msg *msg)
+{
+ struct sandbox_scmi_agent *agent = dev_get_priv(dev);
+ struct scmi_voltd_level_set_in *in = NULL;
+ struct scmi_voltd_level_set_out *out = NULL;
+ struct sandbox_scmi_voltd *voltd_state = NULL;
+
+ if (!msg->in_msg || msg->in_msg_sz < sizeof(*in) ||
+ !msg->out_msg || msg->out_msg_sz < sizeof(*out))
+ return -EINVAL;
+
+ in = (struct scmi_voltd_level_set_in *)msg->in_msg;
+ out = (struct scmi_voltd_level_set_out *)msg->out_msg;
+
+ voltd_state = get_scmi_voltd_state(agent->idx, in->domain_id);
+ if (!voltd_state) {
+ dev_err(dev, "Unexpected domain ID %u\n", in->domain_id);
+
+ out->status = SCMI_NOT_FOUND;
+ } else {
+ voltd_state->voltage_uv = in->voltage_level;
+ out->status = SCMI_SUCCESS;
+ }
+
+ return 0;
+}
+
+static int sandbox_scmi_voltd_level_get(struct udevice *dev,
+ struct scmi_msg *msg)
+{
+ struct sandbox_scmi_agent *agent = dev_get_priv(dev);
+ struct scmi_voltd_level_get_in *in = NULL;
+ struct scmi_voltd_level_get_out *out = NULL;
+ struct sandbox_scmi_voltd *voltd_state = NULL;
+
+ if (!msg->in_msg || msg->in_msg_sz < sizeof(*in) ||
+ !msg->out_msg || msg->out_msg_sz < sizeof(*out))
+ return -EINVAL;
+
+ in = (struct scmi_voltd_level_get_in *)msg->in_msg;
+ out = (struct scmi_voltd_level_get_out *)msg->out_msg;
+
+ voltd_state = get_scmi_voltd_state(agent->idx, in->domain_id);
+ if (!voltd_state) {
+ dev_err(dev, "Unexpected domain ID %u\n", in->domain_id);
+
+ out->status = SCMI_NOT_FOUND;
+ } else {
+ out->voltage_level = voltd_state->voltage_uv;
+ out->status = SCMI_SUCCESS;
+ }
+
+ return 0;
+}
+
static int sandbox_scmi_test_process_msg(struct udevice *dev,
struct scmi_msg *msg)
{
@@ -316,6 +497,22 @@ static int sandbox_scmi_test_process_msg(struct udevice *dev,
break;
}
break;
+ case SCMI_PROTOCOL_ID_VOLTAGE_DOMAIN:
+ switch (msg->message_id) {
+ case SCMI_VOLTAGE_DOMAIN_ATTRIBUTES:
+ return sandbox_scmi_voltd_attribs(dev, msg);
+ case SCMI_VOLTAGE_DOMAIN_CONFIG_SET:
+ return sandbox_scmi_voltd_config_set(dev, msg);
+ case SCMI_VOLTAGE_DOMAIN_CONFIG_GET:
+ return sandbox_scmi_voltd_config_get(dev, msg);
+ case SCMI_VOLTAGE_DOMAIN_LEVEL_SET:
+ return sandbox_scmi_voltd_level_set(dev, msg);
+ case SCMI_VOLTAGE_DOMAIN_LEVEL_GET:
+ return sandbox_scmi_voltd_level_get(dev, msg);
+ default:
+ break;
+ }
+ break;
case SCMI_PROTOCOL_ID_BASE:
case SCMI_PROTOCOL_ID_POWER_DOMAIN:
case SCMI_PROTOCOL_ID_SYSTEM:
@@ -367,6 +564,8 @@ static int sandbox_scmi_test_probe(struct udevice *dev)
.clk_count = ARRAY_SIZE(scmi0_clk),
.reset = scmi0_reset,
.reset_count = ARRAY_SIZE(scmi0_reset),
+ .voltd = scmi0_voltd,
+ .voltd_count = ARRAY_SIZE(scmi0_voltd),
};
break;
case '1':
diff --git a/drivers/firmware/scmi/sandbox-scmi_devices.c b/drivers/firmware/scmi/sandbox-scmi_devices.c
index 1a6fafbf5..aab5782fd 100644
--- a/drivers/firmware/scmi/sandbox-scmi_devices.c
+++ b/drivers/firmware/scmi/sandbox-scmi_devices.c
@@ -1,16 +1,18 @@
// SPDX-License-Identifier: GPL-2.0
/*
- * Copyright (C) 2020, Linaro Limited
+ * Copyright (C) 2020-2021, Linaro Limited
*/
#include <common.h>
#include <clk.h>
#include <dm.h>
+#include <log.h>
#include <malloc.h>
#include <reset.h>
#include <asm/io.h>
#include <asm/scmi_test.h>
#include <dm/device_compat.h>
+#include <power/regulator.h>
/*
* Simulate to some extent a SCMI exchange.
@@ -21,16 +23,19 @@
#define SCMI_TEST_DEVICES_CLK_COUNT 3
#define SCMI_TEST_DEVICES_RD_COUNT 1
+#define SCMI_TEST_DEVICES_VOLTD_COUNT 2
/*
* 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
+ * @regulators: Array of regulator device references used by the 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 udevice *regulators[SCMI_TEST_DEVICES_VOLTD_COUNT];
struct sandbox_scmi_devices devices;
};
@@ -74,6 +79,8 @@ static int sandbox_scmi_devices_probe(struct udevice *dev)
.clk_count = SCMI_TEST_DEVICES_CLK_COUNT,
.reset = priv->reset_ctl,
.reset_count = SCMI_TEST_DEVICES_RD_COUNT,
+ .regul = priv->regulators,
+ .regul_count = SCMI_TEST_DEVICES_VOLTD_COUNT,
};
for (n = 0; n < SCMI_TEST_DEVICES_CLK_COUNT; n++) {
@@ -92,8 +99,24 @@ static int sandbox_scmi_devices_probe(struct udevice *dev)
}
}
+ for (n = 0; n < SCMI_TEST_DEVICES_VOLTD_COUNT; n++) {
+ char name[32];
+
+ ret = snprintf(name, sizeof(name), "regul%zu-supply", n);
+ assert(ret >= 0 && ret < sizeof(name));
+
+ ret = device_get_supply_regulator(dev, name,
+ priv->devices.regul + n);
+ if (ret) {
+ dev_err(dev, "%s: Failed on voltd %zu\n", __func__, n);
+ goto err_regul;
+ }
+ }
+
return 0;
+err_regul:
+ n = SCMI_TEST_DEVICES_RD_COUNT;
err_reset:
for (; n > 0; n--)
reset_free(priv->devices.reset + n - 1);
diff --git a/test/dm/scmi.c b/test/dm/scmi.c
index be60b44b3..792410338 100644
--- a/test/dm/scmi.c
+++ b/test/dm/scmi.c
@@ -20,6 +20,7 @@
#include <dm/device-internal.h>
#include <dm/test.h>
#include <linux/kconfig.h>
+#include <power/regulator.h>
#include <test/ut.h>
static int ut_assert_scmi_state_preprobe(struct unit_test_state *uts)
@@ -47,6 +48,7 @@ static int ut_assert_scmi_state_postprobe(struct unit_test_state *uts,
ut_asserteq(3, scmi_devices->clk_count);
if (IS_ENABLED(CONFIG_RESET_SCMI))
ut_asserteq(1, scmi_devices->reset_count);
+ ut_asserteq(2, scmi_devices->regul_count);
/* State of the simulated SCMI server exposed */
scmi_ctx = sandbox_scmi_service_ctx();
@@ -58,6 +60,8 @@ static int ut_assert_scmi_state_postprobe(struct unit_test_state *uts,
ut_assertnonnull(scmi_ctx->agent[0]->clk);
ut_asserteq(1, scmi_ctx->agent[0]->reset_count);
ut_assertnonnull(scmi_ctx->agent[0]->reset);
+ ut_asserteq(2, scmi_ctx->agent[0]->voltd_count);
+ ut_assertnonnull(scmi_ctx->agent[0]->voltd);
ut_assertnonnull(scmi_ctx->agent[1]);
ut_assertnonnull(scmi_ctx->agent[1]->clk);
@@ -201,3 +205,57 @@ static int dm_test_scmi_resets(struct unit_test_state *uts)
}
DM_TEST(dm_test_scmi_resets, UT_TESTF_SCAN_FDT);
+
+static int dm_test_scmi_voltage_domains(struct unit_test_state *uts)
+{
+ struct sandbox_scmi_devices *scmi_devices;
+ struct sandbox_scmi_service *scmi_ctx;
+ struct sandbox_scmi_voltd *sandbox_voltd;
+ struct dm_regulator_uclass_plat *uc_pdata;
+ struct udevice *dev;
+ struct udevice *regul_dev;
+
+ ut_assertok(load_sandbox_scmi_test_devices(uts, &dev));
+
+ scmi_devices = sandbox_scmi_devices_ctx(dev);
+ scmi_ctx = sandbox_scmi_service_ctx();
+
+ /* Set/Get an SCMI voltage domain level */
+ sandbox_voltd = &scmi_ctx->agent[0]->voltd[0];
+ regul_dev = scmi_devices->regul[0];
+ ut_assert(regul_dev);
+
+ uc_pdata = dev_get_uclass_plat(regul_dev);
+ ut_assert(uc_pdata);
+
+ ut_assertok(regulator_set_value(regul_dev, uc_pdata->min_uV));
+ ut_asserteq(sandbox_voltd->voltage_uv, uc_pdata->min_uV);
+
+ ut_assert(regulator_get_value(regul_dev) == uc_pdata->min_uV);
+
+ ut_assertok(regulator_set_value(regul_dev, uc_pdata->max_uV));
+ ut_asserteq(sandbox_voltd->voltage_uv, uc_pdata->max_uV);
+
+ ut_assert(regulator_get_value(regul_dev) == uc_pdata->max_uV);
+
+ /* Enable/disable SCMI voltage domains */
+ ut_assertok(regulator_set_enable(scmi_devices->regul[0], false));
+ ut_assertok(regulator_set_enable(scmi_devices->regul[1], false));
+ ut_assert(!scmi_ctx->agent[0]->voltd[0].enabled);
+ ut_assert(!scmi_ctx->agent[0]->voltd[1].enabled);
+
+ ut_assertok(regulator_set_enable(scmi_devices->regul[0], true));
+ ut_assert(scmi_ctx->agent[0]->voltd[0].enabled);
+ ut_assert(!scmi_ctx->agent[0]->voltd[1].enabled);
+
+ ut_assertok(regulator_set_enable(scmi_devices->regul[1], true));
+ ut_assert(scmi_ctx->agent[0]->voltd[0].enabled);
+ ut_assert(scmi_ctx->agent[0]->voltd[1].enabled);
+
+ ut_assertok(regulator_set_enable(scmi_devices->regul[0], false));
+ ut_assert(!scmi_ctx->agent[0]->voltd[0].enabled);
+ ut_assert(scmi_ctx->agent[0]->voltd[1].enabled);
+
+ return release_sandbox_scmi_test_devices(uts, dev);
+}
+DM_TEST(dm_test_scmi_voltage_domains, UT_TESTF_SCAN_FDT);
--
2.17.1
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