diff options
Diffstat (limited to 'drivers/pwm/pwm-imx27.c')
| -rw-r--r-- | drivers/pwm/pwm-imx27.c | 35 |
1 files changed, 17 insertions, 18 deletions
diff --git a/drivers/pwm/pwm-imx27.c b/drivers/pwm/pwm-imx27.c index 7d9bc43f1..e1412116e 100644 --- a/drivers/pwm/pwm-imx27.c +++ b/drivers/pwm/pwm-imx27.c @@ -83,7 +83,6 @@ struct pwm_imx27_chip { struct clk *clk_ipg; struct clk *clk_per; void __iomem *mmio_base; - struct pwm_chip chip; /* * The driver cannot read the current duty cycle from the hardware if @@ -93,7 +92,10 @@ struct pwm_imx27_chip { unsigned int duty_cycle; }; -#define to_pwm_imx27_chip(chip) container_of(chip, struct pwm_imx27_chip, chip) +static inline struct pwm_imx27_chip *to_pwm_imx27_chip(struct pwm_chip *chip) +{ + return pwmchip_get_drvdata(chip); +} static int pwm_imx27_clk_prepare_enable(struct pwm_imx27_chip *imx) { @@ -145,7 +147,7 @@ static int pwm_imx27_get_state(struct pwm_chip *chip, state->polarity = PWM_POLARITY_INVERSED; break; default: - dev_warn(chip->dev, "can't set polarity, output disconnected"); + dev_warn(pwmchip_parent(chip), "can't set polarity, output disconnected"); } prescaler = MX3_PWMCR_PRESCALER_GET(val); @@ -177,7 +179,7 @@ static int pwm_imx27_get_state(struct pwm_chip *chip, static void pwm_imx27_sw_reset(struct pwm_chip *chip) { struct pwm_imx27_chip *imx = to_pwm_imx27_chip(chip); - struct device *dev = chip->dev; + struct device *dev = pwmchip_parent(chip); int wait_count = 0; u32 cr; @@ -196,7 +198,7 @@ static void pwm_imx27_wait_fifo_slot(struct pwm_chip *chip, struct pwm_device *pwm) { struct pwm_imx27_chip *imx = to_pwm_imx27_chip(chip); - struct device *dev = chip->dev; + struct device *dev = pwmchip_parent(chip); unsigned int period_ms; int fifoav; u32 sr; @@ -204,8 +206,8 @@ static void pwm_imx27_wait_fifo_slot(struct pwm_chip *chip, sr = readl(imx->mmio_base + MX3_PWMSR); fifoav = FIELD_GET(MX3_PWMSR_FIFOAV, sr); if (fifoav == MX3_PWMSR_FIFOAV_4WORDS) { - period_ms = DIV_ROUND_UP_ULL(pwm_get_period(pwm), - NSEC_PER_MSEC); + period_ms = DIV_ROUND_UP_ULL(pwm->state.period, + NSEC_PER_MSEC); msleep(period_ms); sr = readl(imx->mmio_base + MX3_PWMSR); @@ -219,14 +221,11 @@ static int pwm_imx27_apply(struct pwm_chip *chip, struct pwm_device *pwm, { unsigned long period_cycles, duty_cycles, prescale; struct pwm_imx27_chip *imx = to_pwm_imx27_chip(chip); - struct pwm_state cstate; unsigned long long c; unsigned long long clkrate; int ret; u32 cr; - pwm_get_state(pwm, &cstate); - clkrate = clk_get_rate(imx->clk_per); c = clkrate * state->period; @@ -254,7 +253,7 @@ static int pwm_imx27_apply(struct pwm_chip *chip, struct pwm_device *pwm, * Wait for a free FIFO slot if the PWM is already enabled, and flush * the FIFO if the PWM was disabled and is about to be enabled. */ - if (cstate.enabled) { + if (pwm->state.enabled) { pwm_imx27_wait_fifo_slot(chip, pwm); } else { ret = pwm_imx27_clk_prepare_enable(imx); @@ -306,13 +305,15 @@ MODULE_DEVICE_TABLE(of, pwm_imx27_dt_ids); static int pwm_imx27_probe(struct platform_device *pdev) { + struct pwm_chip *chip; struct pwm_imx27_chip *imx; int ret; u32 pwmcr; - imx = devm_kzalloc(&pdev->dev, sizeof(*imx), GFP_KERNEL); - if (imx == NULL) - return -ENOMEM; + chip = devm_pwmchip_alloc(&pdev->dev, 1, sizeof(*imx)); + if (IS_ERR(chip)) + return PTR_ERR(chip); + imx = to_pwm_imx27_chip(chip); imx->clk_ipg = devm_clk_get(&pdev->dev, "ipg"); if (IS_ERR(imx->clk_ipg)) @@ -324,9 +325,7 @@ static int pwm_imx27_probe(struct platform_device *pdev) return dev_err_probe(&pdev->dev, PTR_ERR(imx->clk_per), "failed to get peripheral clock\n"); - imx->chip.ops = &pwm_imx27_ops; - imx->chip.dev = &pdev->dev; - imx->chip.npwm = 1; + chip->ops = &pwm_imx27_ops; imx->mmio_base = devm_platform_ioremap_resource(pdev, 0); if (IS_ERR(imx->mmio_base)) @@ -341,7 +340,7 @@ static int pwm_imx27_probe(struct platform_device *pdev) if (!(pwmcr & MX3_PWMCR_EN)) pwm_imx27_clk_disable_unprepare(imx); - return devm_pwmchip_add(&pdev->dev, &imx->chip); + return devm_pwmchip_add(&pdev->dev, chip); } static struct platform_driver imx_pwm_driver = { |