diff mbox series

[v3,07/13] soc: qcom: smem: Add qcom_smem_is_available()

Message ID 20230531-rpm-rproc-v3-7-a07dcdefd918@gerhold.net
State Accepted
Commit 4dbb9e2322a3a9c912ce796c20c27045ae8dae22
Headers show
Series [v3,01/13] dt-bindings soc: qcom: smd-rpm: Fix sort order | expand

Commit Message

Stephan Gerhold June 15, 2023, 4:50 p.m. UTC 
Avoid having to look up a dummy item from SMEM to detect if it is
already available or if we need to defer probing.

Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: Stephan Gerhold <stephan@gerhold.net>
---
 drivers/soc/qcom/smem.c       | 11 +++++++++++
 include/linux/soc/qcom/smem.h |  1 +
 2 files changed, 12 insertions(+)
diff mbox series

Patch

diff --git a/drivers/soc/qcom/smem.c b/drivers/soc/qcom/smem.c
index b0d59e815c3b..29193151cf4c 100644
--- a/drivers/soc/qcom/smem.c
+++ b/drivers/soc/qcom/smem.c
@@ -359,6 +359,17 @@  static struct qcom_smem *__smem;
 /* Timeout (ms) for the trylock of remote spinlocks */
 #define HWSPINLOCK_TIMEOUT	1000
 
+/**
+ * qcom_smem_is_available() - Check if SMEM is available
+ *
+ * Return: true if SMEM is available, false otherwise.
+ */
+bool qcom_smem_is_available(void)
+{
+	return !!__smem;
+}
+EXPORT_SYMBOL(qcom_smem_is_available);
+
 static int qcom_smem_alloc_private(struct qcom_smem *smem,
 				   struct smem_partition *part,
 				   unsigned item,
diff --git a/include/linux/soc/qcom/smem.h b/include/linux/soc/qcom/smem.h
index 223db6a9c733..a36a3b9d4929 100644
--- a/include/linux/soc/qcom/smem.h
+++ b/include/linux/soc/qcom/smem.h
@@ -4,6 +4,7 @@ 
 
 #define QCOM_SMEM_HOST_ANY -1
 
+bool qcom_smem_is_available(void);
 int qcom_smem_alloc(unsigned host, unsigned item, size_t size);
 void *qcom_smem_get(unsigned host, unsigned item, size_t *size);