[PATCH v10 15/27] pwm: jz4740: Allow selection of PWM channels 0 and 1

[Paul Cercueil]

The TCU channels 0 and 1 were previously reserved for system tasks, and
thus unavailable for PWM.

Signed-off-by: Paul Cercueil <paul@xxxxxxxxxxxxxxx>
Tested-by: Mathieu Malaterre <malat@xxxxxxxxxx>
Tested-by: Artur Rojek <contact@xxxxxxxxxxxxxx>
---

Notes:
         v6: New patch
    
         v7: No change
    
         v8: ingenic_tcu_[request,release]_channel are dropped. We now use
             the memory resources provided to the driver to detect whether
    	 or not we are allowed to use the TCU channel.
    
         v9: Drop previous system. Call a API function provided by the
             clocksource driver to know if we can use the channel as PWM.
    
         v10: No change

 drivers/pwm/pwm-jz4740.c | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/drivers/pwm/pwm-jz4740.c b/drivers/pwm/pwm-jz4740.c
index f497388fc818..c914589d547b 100644
--- a/drivers/pwm/pwm-jz4740.c
+++ b/drivers/pwm/pwm-jz4740.c
@@ -44,11 +44,7 @@ static int jz4740_pwm_request(struct pwm_chip *chip, struct pwm_device *pwm)
 	char clk_name[16];
 	int ret;
 
-	/*
-	 * Timers 0 and 1 are used for system tasks, so they are unavailable
-	 * for use as PWMs.
-	 */
-	if (pwm->hwpwm < 2)
+	if (!ingenic_tcu_pwm_can_use_chn(pwm->hwpwm))
 		return -EBUSY;
 
 	snprintf(clk_name, sizeof(clk_name), "timer%u", pwm->hwpwm);
-- 
2.11.0