Commit c06fad9d authored Aug 23, 2012 by Philip, Avinash Committed by Thierry Reding Sep 10, 2012

pwm: pwm-tiecap: Disable APWM mode after configure



APWM mode is enabled while configuring PWM device. This was done to
handle shadow & immediate mode update of period and compare registers.
However, leaving it enabled after configuring will cause APWM output on
PWM pin even before enabling PWM device.
Fix the same by disabling APWM mode after configuring if PWM device is
not running.

Signed-off-by: Philip, Avinash <avinashphilip@ti.com>
Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>

parent b817bf5c

drivers/pwm/pwm-tiecap.c

+7 −0

Original line number	Diff line number	Diff line
		@@ -100,6 +100,13 @@ static int ecap_pwm_config(struct pwm_chip chip, struct pwm_device pwm,
		writel(period_cycles, pc->mmio_base + CAP3);
		}

		if (!test_bit(PWMF_ENABLED, &pwm->flags)) {
		reg_val = readw(pc->mmio_base + ECCTL2);
		/* Disable APWM mode to put APWM output Low */
		reg_val &= ~ECCTL2_APWM_MODE;
		writew(reg_val, pc->mmio_base + ECCTL2);
		}

		pm_runtime_put_sync(pc->chip.dev);
		return 0;
		}

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