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From:   Peter Hilber <peter.hilber@opensynergy.com>
To:     <linux-arm-kernel@lists.infradead.org>,
        <devicetree@vger.kernel.org>
CC:     Peter Hilber <peter.hilber@opensynergy.com>,
        Rob Herring <robh+dt@kernel.org>,
        <linux-kernel@vger.kernel.org>, <sudeep.holla@arm.com>,
        <souvik.chakravarty@arm.com>, <alex.bennee@linaro.org>,
        <jean-philippe@linaro.org>, <igor.skalkin@opensynergy.com>,
        <mikhail.golubev@opensynergy.com>, <anton.yakovlev@opensynergy.com>
Subject: [RFC PATCH v2 08/10] firmware: arm_scmi: Add is_scmi_protocol_device()
Date:   Thu, 5 Nov 2020 22:21:14 +0100
Message-ID: <20201105212116.411422-9-peter.hilber@opensynergy.com>
In-Reply-To: <20201105212116.411422-1-peter.hilber@opensynergy.com>
References: <20201105212116.411422-1-peter.hilber@opensynergy.com>
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Precedence: bulk

The scmi-virtio transport driver will need to distinguish SCMI protocol
devices from the SCMI instance device in the chan_setup() and
chan_free() ops. Add this internal helper to be able to distinguish the
two.

Signed-off-by: Peter Hilber <peter.hilber@opensynergy.com>
---
 drivers/firmware/arm_scmi/bus.c    | 5 +++++
 drivers/firmware/arm_scmi/common.h | 2 ++
 2 files changed, 7 insertions(+)

diff --git a/drivers/firmware/arm_scmi/bus.c b/drivers/firmware/arm_scmi/bus.c
index 1377ec76a45d..4f19faafb2c5 100644
--- a/drivers/firmware/arm_scmi/bus.c
+++ b/drivers/firmware/arm_scmi/bus.c
@@ -108,6 +108,11 @@ static struct bus_type scmi_bus_type = {
 	.remove = scmi_dev_remove,
 };
 
+bool is_scmi_protocol_device(struct device *dev)
+{
+	return dev->bus == &scmi_bus_type;
+}
+
 int scmi_driver_register(struct scmi_driver *driver, struct module *owner,
 			 const char *mod_name)
 {
diff --git a/drivers/firmware/arm_scmi/common.h b/drivers/firmware/arm_scmi/common.h
index ec9fd7fce3c7..13c9ac176b23 100644
--- a/drivers/firmware/arm_scmi/common.h
+++ b/drivers/firmware/arm_scmi/common.h
@@ -158,6 +158,8 @@ int scmi_version_get(const struct scmi_handle *h, u8 protocol, u32 *version);
 void scmi_setup_protocol_implemented(const struct scmi_handle *handle,
 				     u8 *prot_imp);
 
+bool is_scmi_protocol_device(struct device *dev);
+
 int scmi_base_protocol_init(struct scmi_handle *h);
 
 int __init scmi_bus_init(void);
-- 
2.25.1