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From: Deepak Kumar Singh <deesin@codeaurora.org>
To: bjorn.andersson@linaro.org, clew@codeaurora.org
Cc: linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org,
	linux-remoteproc@vger.kernel.org,
	Deepak Kumar Singh <deesin@codeaurora.org>,
	Andy Gross <agross@kernel.org>
Subject: [PATCH V1 1/2] soc: qcom: aoss: Expose send for generic usecase
Date: Fri,  2 Apr 2021 11:47:17 +0530	[thread overview]
Message-ID: <1617344238-12137-2-git-send-email-deesin@codeaurora.org> (raw)
In-Reply-To: <1617344238-12137-1-git-send-email-deesin@codeaurora.org>

Not all upcoming usecases will have an interface to allow the aoss
driver to hook onto. Expose the send api and create a get function to
enable drivers to send their own messages to aoss.

Signed-off-by: Chris Lew <clew@codeaurora.org>
Signed-off-by: Deepak Kumar Singh <deesin@codeaurora.org>
---
 drivers/soc/qcom/qcom_aoss.c | 36 +++++++++++++++++++++++++++++++++++-
 1 file changed, 35 insertions(+), 1 deletion(-)

diff --git a/drivers/soc/qcom/qcom_aoss.c b/drivers/soc/qcom/qcom_aoss.c
index 53acb94..5c643f0 100644
--- a/drivers/soc/qcom/qcom_aoss.c
+++ b/drivers/soc/qcom/qcom_aoss.c
@@ -8,10 +8,12 @@
 #include <linux/io.h>
 #include <linux/mailbox_client.h>
 #include <linux/module.h>
+#include <linux/of_platform.h>
 #include <linux/platform_device.h>
 #include <linux/pm_domain.h>
 #include <linux/thermal.h>
 #include <linux/slab.h>
+#include <linux/soc/qcom/qcom_aoss.h>
 
 #define QMP_DESC_MAGIC			0x0
 #define QMP_DESC_VERSION		0x4
@@ -223,11 +225,14 @@ static bool qmp_message_empty(struct qmp *qmp)
  *
  * Return: 0 on success, negative errno on failure
  */
-static int qmp_send(struct qmp *qmp, const void *data, size_t len)
+int qmp_send(struct qmp *qmp, const void *data, size_t len)
 {
 	long time_left;
 	int ret;
 
+	if (!qmp || !data)
+		return -EINVAL;
+
 	if (WARN_ON(len + sizeof(u32) > qmp->size))
 		return -EINVAL;
 
@@ -261,6 +266,7 @@ static int qmp_send(struct qmp *qmp, const void *data, size_t len)
 
 	return ret;
 }
+EXPORT_SYMBOL(qmp_send);
 
 static int qmp_qdss_clk_prepare(struct clk_hw *hw)
 {
@@ -515,6 +521,34 @@ static void qmp_cooling_devices_remove(struct qmp *qmp)
 		thermal_cooling_device_unregister(qmp->cooling_devs[i].cdev);
 }
 
+/**
+ * qmp_get() - get a qmp handle from a device
+ * @dev: client device pointer
+ *
+ * Return: handle to qmp device on success, ERR_PTR() on failure
+ */
+struct qmp *qmp_get(struct device *dev)
+{
+	struct platform_device *pdev;
+	struct device_node *np;
+	struct qmp *qmp;
+
+	if (!dev || !dev->of_node)
+		return ERR_PTR(-ENODEV);
+
+	np = of_parse_phandle(dev->of_node, "qcom,qmp", 0);
+	if (!np)
+		return ERR_PTR(-ENODEV);
+
+	pdev = of_find_device_by_node(np);
+	if (!pdev)
+		return ERR_PTR(-EINVAL);
+
+	qmp = platform_get_drvdata(pdev);
+	return qmp ? qmp : ERR_PTR(-EPROBE_DEFER);
+}
+EXPORT_SYMBOL(qmp_get);
+
 static int qmp_probe(struct platform_device *pdev)
 {
 	struct resource *res;
-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project


  reply	other threads:[~2021-04-02  6:18 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-04-02  6:17 [PATCH V1 0/2] " Deepak Kumar Singh
2021-04-02  6:17 ` Deepak Kumar Singh [this message]
2021-04-02  9:09   ` [PATCH V1 1/2] " kernel test robot
2021-04-02  9:50   ` kernel test robot
2021-04-04 17:17   ` Bjorn Andersson
2021-04-09  7:31     ` Manivannan Sadhasivam
2021-04-13  0:06       ` Bjorn Andersson
2021-04-02  6:17 ` [PATCH V1 2/2] soc: qcom: aoss: Add debugfs entry Deepak Kumar Singh
2021-04-04 16:59   ` Bjorn Andersson
2021-04-04 17:20 ` [PATCH V1 0/2] soc: qcom: aoss: Expose send for generic usecase Bjorn Andersson

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