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pwm: lp3943: Dynamically allocate PWM chip base 

[ Upstream commit 1f0f1e80fd ]

When there are other PWM controllers enabled along with pwm-lp3943,
pwm-lp3942 is failing to probe with -EEXIST error. This is because
other PWM controllers are probed first and assigned PWM base 0 and
pwm-lp3943 is requesting for 0 again.

In order to avoid this, assign the chip base with -1, so that it is
dynamically allocated.

Fixes: af66b3c093 ("pwm: Add LP3943 PWM driver")
Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
Reviewed-by: Uwe Kleine-König <u.kleine-könig@pengutronix.de>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5.4-rM2-2.2.x-imx-squashed
Lokesh Vutla 2020-10-30 19:11:35 +05:30 committed by Greg Kroah-Hartman
parent 6bf2ef4bd3
commit ceadde18f6
1 changed files with 1 additions and 0 deletions
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drivers/pwm/pwm-lp3943.c
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@ -275,6 +275,7 @@ static int lp3943_pwm_probe(struct platform_device *pdev)
lp3943_pwm->chip.dev = &pdev->dev;
lp3943_pwm->chip.ops = &lp3943_pwm_ops;
lp3943_pwm->chip.npwm = LP3943_NUM_PWMS;
lp3943_pwm->chip.base = -1;
platform_set_drvdata(pdev, lp3943_pwm);