Quoting Bjorn Andersson (2019-01-06 00:09:10)
> diff --git a/drivers/soc/qcom/aoss-qmp.c b/drivers/soc/qcom/aoss-qmp.c
> new file mode 100644
> index 000000000000..de52703b96b6
> --- /dev/null
> +++ b/drivers/soc/qcom/aoss-qmp.c
> @@ -0,0 +1,313 @@
[...]
> +
> +static int qmp_probe(struct platform_device *pdev)
> +{
> + struct resource *res;
> + struct qmp *qmp;
> + int irq;
> + int ret;
> +
> + qmp = devm_kzalloc(&pdev->dev, sizeof(*qmp), GFP_KERNEL);
> + if (!qmp)
> + return -ENOMEM;
> +
> + qmp->dev = &pdev->dev;
> + init_waitqueue_head(&qmp->event);
> + mutex_init(&qmp->tx_lock);
> +
> + res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> + qmp->msgram = devm_ioremap_resource(&pdev->dev, res);
> + if (IS_ERR(qmp->msgram))
> + return PTR_ERR(qmp->msgram);
> +
> + qmp->mbox_client.dev = &pdev->dev;
> + qmp->mbox_client.knows_txdone = true;
> + qmp->mbox_chan = mbox_request_channel(&qmp->mbox_client, 0);
> + if (IS_ERR(qmp->mbox_chan)) {
> + dev_err(&pdev->dev, "failed to acquire ipc mailbox\n");
> + return PTR_ERR(qmp->mbox_chan);
> + }
> +
> + irq = platform_get_irq(pdev, 0);
> + ret = devm_request_irq(&pdev->dev, irq, qmp_intr, IRQF_ONESHOT,
> + "aoss-qmp", qmp);
> + if (ret < 0) {
> + dev_err(&pdev->dev, "failed to request interrupt\n");
Don't we need to free_mbox_channel() all over the place here?
> + return ret;
> + }
> +
> + ret = qmp_open(qmp);
> + if (ret < 0)
> + return ret;
> +
> + platform_set_drvdata(pdev, qmp);
> +
> + if (of_property_read_bool(pdev->dev.of_node, "#power-domain-cells")) {
> + qmp->pd_pdev = platform_device_register_data(&pdev->dev,
> + "aoss_qmp_pd",
> + PLATFORM_DEVID_NONE,
> + NULL, 0);
> + if (IS_ERR(qmp->pd_pdev))
> + dev_err(&pdev->dev, "failed to register AOSS PD\n");
> + }
> +
> + return 0;
> +}
[...]
> diff --git a/include/linux/soc/qcom/aoss-qmp.h b/include/linux/soc/qcom/aoss-qmp.h
> new file mode 100644
> index 000000000000..32ccaa091a9f
> --- /dev/null
> +++ b/include/linux/soc/qcom/aoss-qmp.h
> @@ -0,0 +1,12 @@
> +/* SPDX-License-Identifier: GPL-2.0 */
> +/*
> + * Copyright (c) 2018, Linaro Ltd
> + */
> +#ifndef __AOP_QMP_H__
> +#define __AOP_QMP_H__
include <linux/types.h> for size_t usage?
> +
> +struct qmp;
> +
> +int qmp_send(struct qmp *qmp, const void *data, size_t len);
> +
