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| author | Tom Rini <trini@konsulko.com> | 2015-05-26 10:38:01 -0400 |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2015-05-26 10:38:01 -0400 |
| commit | 9bea236b3402a262772b66d055ec6431cbd3ba87 (patch) | |
| tree | 8347dda9cb6ec9ad0d1bb15040257e01f8f31fc0 /drivers/pwm/pwm-imx.c | |
| parent | d43e15421014c17b90c3e288e3eff18ad8aaf346 (diff) | |
| parent | 1022b85cb0e143b4f3a8e6c7d9258d516920d464 (diff) | |
| download | u-boot-imx-9bea236b3402a262772b66d055ec6431cbd3ba87.zip u-boot-imx-9bea236b3402a262772b66d055ec6431cbd3ba87.tar.gz u-boot-imx-9bea236b3402a262772b66d055ec6431cbd3ba87.tar.bz2 | |
Merge branch 'master' of git://www.denx.de/git/u-boot-imx
Diffstat (limited to 'drivers/pwm/pwm-imx.c')
| -rw-r--r-- | drivers/pwm/pwm-imx.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/pwm/pwm-imx.c b/drivers/pwm/pwm-imx.c index 40bf027..47799fc 100644 --- a/drivers/pwm/pwm-imx.c +++ b/drivers/pwm/pwm-imx.c @@ -18,6 +18,9 @@ int pwm_init(int pwm_id, int div, int invert) { struct pwm_regs *pwm = (struct pwm_regs *)pwm_id_to_reg(pwm_id); + if (!pwm) + return -1; + writel(0, &pwm->ir); return 0; } @@ -28,6 +31,9 @@ int pwm_config(int pwm_id, int duty_ns, int period_ns) unsigned long period_cycles, duty_cycles, prescale; u32 cr; + if (!pwm) + return -1; + pwm_imx_get_parms(period_ns, duty_ns, &period_cycles, &duty_cycles, &prescale); @@ -47,6 +53,9 @@ int pwm_enable(int pwm_id) { struct pwm_regs *pwm = (struct pwm_regs *)pwm_id_to_reg(pwm_id); + if (!pwm) + return -1; + setbits_le32(&pwm->cr, PWMCR_EN); return 0; } @@ -55,5 +64,8 @@ void pwm_disable(int pwm_id) { struct pwm_regs *pwm = (struct pwm_regs *)pwm_id_to_reg(pwm_id); + if (!pwm) + return; + clrbits_le32(&pwm->cr, PWMCR_EN); } |