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pwm: bcm2835: Make use of devm_pwmchip_alloc() function

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This prepares the pwm-bcm2835 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/441489772bdfbb2cd206fd534b36c63e8c50843a.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 10:31:03 +01:00
parent af184748c6
commit 19c09ed094
1 changed files with 9 additions and 10 deletions
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19
drivers/pwm/pwm-bcm2835.c
View File

@ -24,7 +24,6 @@
#define PERIOD_MIN 0x2
struct bcm2835_pwm {
struct pwm_chip chip;
void __iomem *base;
struct clk *clk;
unsigned long rate;
@ -32,7 +31,7 @@ struct bcm2835_pwm {
static inline struct bcm2835_pwm *to_bcm2835_pwm(struct pwm_chip *chip)
{
return container_of(chip, struct bcm2835_pwm, chip);
return pwmchip_get_drvdata(chip);
}
static int bcm2835_pwm_request(struct pwm_chip *chip, struct pwm_device *pwm)
@ -134,12 +133,14 @@ static void devm_clk_rate_exclusive_put(void *data)
static int bcm2835_pwm_probe(struct platform_device *pdev)
{
struct pwm_chip *chip;
struct bcm2835_pwm *pc;
int ret;
pc = devm_kzalloc(&pdev->dev, sizeof(*pc), GFP_KERNEL);
if (!pc)
return -ENOMEM;
chip = devm_pwmchip_alloc(&pdev->dev, 2, sizeof(*pc));
if (IS_ERR(chip))
return PTR_ERR(chip);
pc = to_bcm2835_pwm(chip);
pc->base = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(pc->base))
@ -165,14 +166,12 @@ static int bcm2835_pwm_probe(struct platform_device *pdev)
return dev_err_probe(&pdev->dev, -EINVAL,
"failed to get clock rate\n");
pc->chip.dev = &pdev->dev;
pc->chip.ops = &bcm2835_pwm_ops;
pc->chip.atomic = true;
pc->chip.npwm = 2;
chip->ops = &bcm2835_pwm_ops;
chip->atomic = true;
platform_set_drvdata(pdev, pc);
ret = devm_pwmchip_add(&pdev->dev, &pc->chip);
ret = devm_pwmchip_add(&pdev->dev, chip);
if (ret < 0)
return dev_err_probe(&pdev->dev, ret,
"failed to add pwmchip\n");