diff options
| -rw-r--r-- | drivers/pwm/pwm-imx.c | 110 |
1 files changed, 101 insertions, 9 deletions
diff --git a/drivers/pwm/pwm-imx.c b/drivers/pwm/pwm-imx.c index 83c1bfa820..8d8f3e6f9f 100644 --- a/drivers/pwm/pwm-imx.c +++ b/drivers/pwm/pwm-imx.c @@ -8,6 +8,7 @@ #include <common.h> #include <div64.h> +#include <dm.h> #include <pwm.h> #include <asm/arch/imx-regs.h> #include <asm/io.h> @@ -24,18 +25,12 @@ int pwm_init(int pwm_id, int div, int invert) return 0; } -int pwm_config(int pwm_id, int duty_ns, int period_ns) +int pwm_config_internal(struct pwm_regs *pwm, unsigned long period_cycles, + unsigned long duty_cycles, unsigned long prescale) { - struct pwm_regs *pwm = (struct pwm_regs *)pwm_id_to_reg(pwm_id); - 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); - + writel(0, &pwm->ir); cr = PWMCR_PRESCALER(prescale) | PWMCR_DOZEEN | PWMCR_WAITEN | PWMCR_DBGEN | PWMCR_CLKSRC_IPG_HIGH; @@ -48,6 +43,20 @@ int pwm_config(int pwm_id, int duty_ns, int period_ns) return 0; } +int pwm_config(int pwm_id, int duty_ns, int period_ns) +{ + struct pwm_regs *pwm = (struct pwm_regs *)pwm_id_to_reg(pwm_id); + unsigned long period_cycles, duty_cycles, prescale; + + if (!pwm) + return -1; + + pwm_imx_get_parms(period_ns, duty_ns, &period_cycles, &duty_cycles, + &prescale); + + return pwm_config_internal(pwm, period_cycles, duty_cycles, prescale); +} + int pwm_enable(int pwm_id) { struct pwm_regs *pwm = (struct pwm_regs *)pwm_id_to_reg(pwm_id); @@ -68,3 +77,86 @@ void pwm_disable(int pwm_id) clrbits_le32(&pwm->cr, PWMCR_EN); } + +#if defined(CONFIG_DM_PWM) +struct imx_pwm_priv { + struct pwm_regs *regs; + bool invert; +}; + +static int imx_pwm_set_invert(struct udevice *dev, uint channel, + bool polarity) +{ + struct imx_pwm_priv *priv = dev_get_priv(dev); + + debug("%s: polarity=%u\n", __func__, polarity); + priv->invert = polarity; + + return 0; +} + +static int imx_pwm_set_config(struct udevice *dev, uint channel, + uint period_ns, uint duty_ns) +{ + struct imx_pwm_priv *priv = dev_get_priv(dev); + struct pwm_regs *regs = priv->regs; + unsigned long period_cycles, duty_cycles, prescale; + + debug("%s: Config '%s' channel: %d\n", __func__, dev->name, channel); + + pwm_imx_get_parms(period_ns, duty_ns, &period_cycles, &duty_cycles, + &prescale); + + return pwm_config_internal(regs, period_cycles, duty_cycles, prescale); +}; + +static int imx_pwm_set_enable(struct udevice *dev, uint channel, bool enable) +{ + struct imx_pwm_priv *priv = dev_get_priv(dev); + struct pwm_regs *regs = priv->regs; + + debug("%s: Enable '%s' state: %d\n", __func__, dev->name, enable); + + if (enable) + setbits_le32(®s->cr, PWMCR_EN); + else + clrbits_le32(®s->cr, PWMCR_EN); + + return 0; +}; + +static int imx_pwm_ofdata_to_platdata(struct udevice *dev) +{ + struct imx_pwm_priv *priv = dev_get_priv(dev); + + priv->regs = (struct pwm_regs *)devfdt_get_addr(dev); + + return 0; +} + +static int imx_pwm_probe(struct udevice *dev) +{ + return 0; +} + +static const struct pwm_ops imx_pwm_ops = { + .set_invert = imx_pwm_set_invert, + .set_config = imx_pwm_set_config, + .set_enable = imx_pwm_set_enable, +}; + +static const struct udevice_id imx_pwm_ids[] = { + { .compatible = "fsl,imx27-pwm" }, + { } +}; + +U_BOOT_DRIVER(imx_pwm) = { + .name = "imx_pwm", + .id = UCLASS_PWM, + .of_match = imx_pwm_ids, + .ops = &imx_pwm_ops, + .ofdata_to_platdata = imx_pwm_ofdata_to_platdata, + .probe = imx_pwm_probe, + .priv_auto_alloc_size = sizeof(struct imx_pwm_priv), +}; +#endif |