[PATCH] gpio: viperboard: mark gpioa_clk variable as __ro_after_init

[Len Bao]

The 'gpioa_clk' variable is initialized only during the init phase in
the 'vprbrd_gpio_init' function and never changed. So, mark it as
__ro_after_init.

Signed-off-by: Len Bao <len.bao@xxxxxx>
---
 drivers/gpio/gpio-viperboard.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpio/gpio-viperboard.c b/drivers/gpio/gpio-viperboard.c
index 89087fd48..4e6442390 100644
--- a/drivers/gpio/gpio-viperboard.c
+++ b/drivers/gpio/gpio-viperboard.c
@@ -70,7 +70,7 @@ struct vprbrd_gpio {
 };
 
 /* gpioa sampling clock module parameter */
-static unsigned char gpioa_clk;
+static unsigned char gpioa_clk __ro_after_init;
 static unsigned int gpioa_freq = VPRBRD_GPIOA_FREQ_DEFAULT;
 module_param(gpioa_freq, uint, 0);
 MODULE_PARM_DESC(gpioa_freq,
-- 
2.43.0