diff mbox series

[v7,4/9] pwm: tiehrpwm: derive PERIOD_MAX from TBPRD field

Message ID 20251128003634.247529-5-rafael.v.volkmer@gmail.com
State Changes Requested
Headers show
Series pwm: tiehrpwm: prepare for waveform callbacks | expand

Commit Message

Rafael V. Volkmer Nov. 28, 2025, 12:36 a.m. UTC 
Replace the open-coded PERIOD_MAX constant (0x10000) with a definition
derived from the TBPRD field layout. Introduce TIEHRPWM_TBPRD_TBPRD to
describe the 16-bit TBPRD field and compute TIEHRPWM_PERIOD_MAX as
FIELD_MAX(TIEHRPWM_TBPRD_TBPRD) + 1.

This keeps the effective upper bound unchanged while tying it directly
to the hardware register layout instead of a hard-coded literal.

No functional change intended.

Signed-off-by: Rafael V. Volkmer <rafael.v.volkmer@gmail.com>
---
 drivers/pwm/pwm-tiehrpwm.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/drivers/pwm/pwm-tiehrpwm.c b/drivers/pwm/pwm-tiehrpwm.c
index 0802f0553587..4b8b4a9e7379 100644
--- a/drivers/pwm/pwm-tiehrpwm.c
+++ b/drivers/pwm/pwm-tiehrpwm.c
@@ -38,7 +38,9 @@ 
 
 #define TIEHRPWM_CLKDIV_MAX			7
 #define TIEHRPWM_HSPCLKDIV_MAX			7
-#define TIEHRPWM_PERIOD_MAX			0x10000
+
+#define TIEHRPWM_TBPRD_TBPRD			GENMASK(15, 0)
+#define TIEHRPWM_PERIOD_MAX			(FIELD_MAX(TIEHRPWM_TBPRD_TBPRD) + 1)
 
 /* compare module registers */
 #define TIEHRPWM_CMPA				0x12