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| author | Sascha Hauer <s.hauer@pengutronix.de> | 2009-06-19 11:08:07 +0200 |
|---|---|---|
| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2009-08-14 12:40:41 +0200 |
| commit | a058cbc17901108de9179dccdb29dff0e00c79fe (patch) | |
| tree | a919e241d680470448ae73a28dc0a48a4f523319 /arch/arm/plat-mxc | |
| parent | 6134b2cbb0e24f897fd1063745638397809fca29 (diff) | |
| download | kernel_samsung_crespo-a058cbc17901108de9179dccdb29dff0e00c79fe.zip kernel_samsung_crespo-a058cbc17901108de9179dccdb29dff0e00c79fe.tar.gz kernel_samsung_crespo-a058cbc17901108de9179dccdb29dff0e00c79fe.tar.bz2 | |
mxc pwm: add mx25 support
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'arch/arm/plat-mxc')
| -rw-r--r-- | arch/arm/plat-mxc/pwm.c | 17 |
1 files changed, 13 insertions, 4 deletions
diff --git a/arch/arm/plat-mxc/pwm.c b/arch/arm/plat-mxc/pwm.c index 42dd17b..5cdbd60 100644 --- a/arch/arm/plat-mxc/pwm.c +++ b/arch/arm/plat-mxc/pwm.c @@ -32,6 +32,7 @@ #define MX3_PWMPR 0x10 /* PWM Period Register */ #define MX3_PWMCR_PRESCALER(x) (((x - 1) & 0xFFF) << 4) #define MX3_PWMCR_CLKSRC_IPG_HIGH (2 << 16) +#define MX3_PWMCR_CLKSRC_IPG (1 << 16) #define MX3_PWMCR_EN (1 << 0) @@ -55,9 +56,11 @@ int pwm_config(struct pwm_device *pwm, int duty_ns, int period_ns) if (pwm == NULL || period_ns == 0 || duty_ns > period_ns) return -EINVAL; - if (cpu_is_mx27() || cpu_is_mx3()) { + if (cpu_is_mx27() || cpu_is_mx3() || cpu_is_mx25()) { unsigned long long c; unsigned long period_cycles, duty_cycles, prescale; + u32 cr; + c = clk_get_rate(pwm->clk); c = c * period_ns; do_div(c, 1000000000); @@ -72,9 +75,15 @@ int pwm_config(struct pwm_device *pwm, int duty_ns, int period_ns) writel(duty_cycles, pwm->mmio_base + MX3_PWMSAR); writel(period_cycles, pwm->mmio_base + MX3_PWMPR); - writel(MX3_PWMCR_PRESCALER(prescale) | - MX3_PWMCR_CLKSRC_IPG_HIGH | MX3_PWMCR_EN, - pwm->mmio_base + MX3_PWMCR); + + cr = MX3_PWMCR_PRESCALER(prescale) | MX3_PWMCR_EN; + + if (cpu_is_mx25()) + cr |= MX3_PWMCR_CLKSRC_IPG; + else + cr |= MX3_PWMCR_CLKSRC_IPG_HIGH; + + writel(cr, pwm->mmio_base + MX3_PWMCR); } else if (cpu_is_mx1() || cpu_is_mx21()) { /* The PWM subsystem allows for exact frequencies. However, * I cannot connect a scope on my device to the PWM line and |