diff options
Diffstat (limited to 'drivers/soc/qcom/aoss-qmp-pd.c')
| -rw-r--r-- | drivers/soc/qcom/aoss-qmp-pd.c | 158 |
1 files changed, 158 insertions, 0 deletions
diff --git a/drivers/soc/qcom/aoss-qmp-pd.c b/drivers/soc/qcom/aoss-qmp-pd.c new file mode 100644 index 000000000000..a375abcbe9c7 --- /dev/null +++ b/drivers/soc/qcom/aoss-qmp-pd.c @@ -0,0 +1,158 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (c) 2018, Linaro Ltd + */ +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/pm_domain.h> +#include <linux/soc/qcom/aoss-qmp.h> +#include <dt-bindings/power/qcom-aoss-qmp.h> + +/* Requests are expected to be 96 bytes long */ +#define AOSS_QMP_PD_MSG_LEN 96 + +struct qmp_pd { + struct qmp *qmp; + struct generic_pm_domain pd; +}; + +#define to_qmp_pd_resource(res) container_of(res, struct qmp_pd, pd) + +struct qmp_pd_resource { + const char *name; + int (*on)(struct generic_pm_domain *domain); + int (*off)(struct generic_pm_domain *domain); +}; + +static int qmp_pd_clock_toggle(struct qmp_pd *res, bool enable) +{ + char buf[AOSS_QMP_PD_MSG_LEN]; + + memset(buf, 0, sizeof(buf)); + snprintf(buf, sizeof(buf), "{class: clock, res: %s, val: %d}", + res->pd.name, enable); + return qmp_send(res->qmp, buf, sizeof(buf)); +} + +static int qmp_pd_clock_on(struct generic_pm_domain *domain) +{ + return qmp_pd_clock_toggle(to_qmp_pd_resource(domain), true); +} + +static int qmp_pd_clock_off(struct generic_pm_domain *domain) +{ + return qmp_pd_clock_toggle(to_qmp_pd_resource(domain), false); +} + +static int qmp_pd_image_toggle(struct qmp_pd *res, bool enable) +{ + char buf[AOSS_QMP_PD_MSG_LEN]; + + memset(buf, 0, sizeof(buf)); + snprintf(buf, sizeof(buf), + "{class: image, res: load_state, name: %s, val: %s}", + res->pd.name, enable ? "on" : "off"); + return qmp_send(res->qmp, buf, sizeof(buf)); +} + +static int qmp_pd_image_on(struct generic_pm_domain *domain) +{ + return qmp_pd_image_toggle(to_qmp_pd_resource(domain), true); +} + +static int qmp_pd_image_off(struct generic_pm_domain *domain) +{ + return qmp_pd_image_toggle(to_qmp_pd_resource(domain), false); +} + +static const struct qmp_pd_resource sdm845_resources[] = { + [AOSS_QMP_QDSS_CLK] = { "qdss", qmp_pd_clock_on, qmp_pd_clock_off }, + [AOSS_QMP_LS_CDSP] = { "cdsp", qmp_pd_image_on, qmp_pd_image_off }, + [AOSS_QMP_LS_LPASS] = { "adsp", qmp_pd_image_on, qmp_pd_image_off }, + [AOSS_QMP_LS_MODEM] = { "modem", qmp_pd_image_on, qmp_pd_image_off }, + [AOSS_QMP_LS_SLPI] = { "slpi", qmp_pd_image_on, qmp_pd_image_off }, + [AOSS_QMP_LS_SPSS] = { "spss", qmp_pd_image_on, qmp_pd_image_off }, + [AOSS_QMP_LS_VENUS] = { "venus", qmp_pd_image_on, qmp_pd_image_off }, +}; + +static int qmp_pd_probe(struct platform_device *pdev) +{ + struct genpd_onecell_data *data; + struct device *parent = pdev->dev.parent; + struct qmp_pd *res; + struct qmp *qmp; + size_t num = ARRAY_SIZE(sdm845_resources); + int ret; + int i; + + qmp = dev_get_drvdata(pdev->dev.parent); + if (!qmp) + return -EINVAL; + + res = devm_kcalloc(&pdev->dev, num, sizeof(*res), GFP_KERNEL); + if (!res) + return -ENOMEM; + + data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL); + if (!data) + return -ENOMEM; + + data->domains = devm_kcalloc(&pdev->dev, num, sizeof(*data->domains), + GFP_KERNEL); + if (!data->domains) + return -ENOMEM; + + for (i = 0; i < num; i++) { + res[i].qmp = qmp; + res[i].pd.name = sdm845_resources[i].name; + res[i].pd.power_on = sdm845_resources[i].on; + res[i].pd.power_off = sdm845_resources[i].off; + + ret = pm_genpd_init(&res[i].pd, NULL, true); + if (ret < 0) { + dev_err(&pdev->dev, "failed to init genpd\n"); + goto unroll_genpds; + } + + data->domains[i] = &res[i].pd; + } + + data->num_domains = i; + + platform_set_drvdata(pdev, data); + + return of_genpd_add_provider_onecell(parent->of_node, data); + +unroll_genpds: + for (i--; i >= 0; i--) + pm_genpd_remove(data->domains[i]); + + return ret; +} + +static int qmp_pd_remove(struct platform_device *pdev) +{ + struct device *parent = pdev->dev.parent; + struct genpd_onecell_data *data = platform_get_drvdata(pdev); + int i; + + of_genpd_del_provider(parent->of_node); + + for (i = 0; i < data->num_domains; i++) + pm_genpd_remove(data->domains[i]); + + return 0; +} + +static struct platform_driver qmp_pd_driver = { + .driver = { + .name = "aoss_qmp_pd", + }, + .probe = qmp_pd_probe, + .remove = qmp_pd_remove, +}; +module_platform_driver(qmp_pd_driver); + +MODULE_ALIAS("platform:aoss_qmp_pd"); +MODULE_DESCRIPTION("Qualcomm AOSS QMP load-state driver"); +MODULE_LICENSE("GPL v2"); |