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pwm: imx-tpm: Make use of devm_pwmchip_alloc() function

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This prepares the pwm-tmp driver to further changes of the pwm core
outlined in the commit introducing devm_pwmchip_alloc(). There is no
intended semantical change and the driver should behave as before.

Link: https://lore.kernel.org/r/5de5d53295fa445d58a79f83421dd3406166c3c6.1707900770.git.u.kleine-koenig@pengutronix.de
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
This commit is contained in:
Uwe Kleine-König 2024-02-14 10:31:37 +01:00
parent dcef3929e0
commit abf6569d64
1 changed files with 19 additions and 15 deletions
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34
drivers/pwm/pwm-imx-tpm.c
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@ -57,7 +57,6 @@
#define PWM_IMX_TPM_MOD_MOD GENMASK(PWM_IMX_TPM_MOD_WIDTH - 1, 0) #define PWM_IMX_TPM_MOD_MOD GENMASK(PWM_IMX_TPM_MOD_WIDTH - 1, 0)
struct imx_tpm_pwm_chip { struct imx_tpm_pwm_chip {
struct pwm_chip chip;
struct clk *clk; struct clk *clk;
void __iomem *base; void __iomem *base;
struct mutex lock; struct mutex lock;
@ -75,7 +74,7 @@ struct imx_tpm_pwm_param {
static inline struct imx_tpm_pwm_chip * static inline struct imx_tpm_pwm_chip *
to_imx_tpm_pwm_chip(struct pwm_chip *chip) to_imx_tpm_pwm_chip(struct pwm_chip *chip)
{ {
return container_of(chip, struct imx_tpm_pwm_chip, chip); return pwmchip_get_drvdata(chip);
} }
/* /*
@ -336,35 +335,40 @@ static const struct pwm_ops imx_tpm_pwm_ops = {
static int pwm_imx_tpm_probe(struct platform_device *pdev) static int pwm_imx_tpm_probe(struct platform_device *pdev)
{ {
struct pwm_chip *chip;
struct imx_tpm_pwm_chip *tpm; struct imx_tpm_pwm_chip *tpm;
void __iomem *base;
int ret; int ret;
unsigned int npwm;
u32 val; u32 val;
tpm = devm_kzalloc(&pdev->dev, sizeof(*tpm), GFP_KERNEL); base = devm_platform_ioremap_resource(pdev, 0);
if (!tpm) if (IS_ERR(base))
return -ENOMEM; return PTR_ERR(base);
/* get number of channels */
val = readl(base + PWM_IMX_TPM_PARAM);
npwm = FIELD_GET(PWM_IMX_TPM_PARAM_CHAN, val);
chip = devm_pwmchip_alloc(&pdev->dev, npwm, sizeof(*tpm));
if (IS_ERR(chip))
return PTR_ERR(chip);
tpm = to_imx_tpm_pwm_chip(chip);
platform_set_drvdata(pdev, tpm); platform_set_drvdata(pdev, tpm);
tpm->base = devm_platform_ioremap_resource(pdev, 0); tpm->base = base;
if (IS_ERR(tpm->base))
return PTR_ERR(tpm->base);
tpm->clk = devm_clk_get_enabled(&pdev->dev, NULL); tpm->clk = devm_clk_get_enabled(&pdev->dev, NULL);
if (IS_ERR(tpm->clk)) if (IS_ERR(tpm->clk))
return dev_err_probe(&pdev->dev, PTR_ERR(tpm->clk), return dev_err_probe(&pdev->dev, PTR_ERR(tpm->clk),
"failed to get PWM clock\n"); "failed to get PWM clock\n");
tpm->chip.dev = &pdev->dev; chip->ops = &imx_tpm_pwm_ops;
tpm->chip.ops = &imx_tpm_pwm_ops;
/* get number of channels */
val = readl(tpm->base + PWM_IMX_TPM_PARAM);
tpm->chip.npwm = FIELD_GET(PWM_IMX_TPM_PARAM_CHAN, val);
mutex_init(&tpm->lock); mutex_init(&tpm->lock);
ret = devm_pwmchip_add(&pdev->dev, &tpm->chip); ret = devm_pwmchip_add(&pdev->dev, chip);
if (ret) if (ret)
return dev_err_probe(&pdev->dev, ret, "failed to add PWM chip\n"); return dev_err_probe(&pdev->dev, ret, "failed to add PWM chip\n");