soc: fsl: cpm1: tsa: Add missing spinlock comment

checkpatch.pl raises the following issue
  CHECK: spinlock_t definition without comment

Add the missing comment.

Signed-off-by: Herve Codina <herve.codina@bootlin.com>
Reviewed-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Link: https://lore.kernel.org/r/20240808071132.149251-7-herve.codina@bootlin.com
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>

diff --git a/drivers/soc/fsl/qe/tsa.c b/drivers/soc/fsl/qe/tsa.c
index 7b1032fb1572d0697ee70a85b96cf395741c254d..a9d35b44489de4c6607eda479172fed54436f0ba 100644 (file)
--- a/drivers/soc/fsl/qe/tsa.c
+++ b/drivers/soc/fsl/qe/tsa.c
@@ -128,7 +128,7 @@ struct tsa {
        void __iomem *si_regs;
        void __iomem *si_ram;
        resource_size_t si_ram_sz;
-       spinlock_t      lock;
+       spinlock_t      lock; /* Lock for read/modify/write sequence */
        int tdms; /* TSA_TDMx ORed */
        struct tsa_tdm tdm[2]; /* TDMa and TDMb */
        struct tsa_serial {