drivers/pwm

config PWM_SAMSUNG tristate "Samsung PWM support" depends on PLAT_SAMSUNG || ARCH_EXYNOS help  Generic PWM framework driver for Samsung.  To compile this driver as a module, choose M here: the module  will be called pwm-samsung.

obj-$(CONFIG_PWM) += core.oobj-$(CONFIG_PWM_SAMSUNG) += pwm-samsung.o

static struct platform_driver pwm_samsung_driver = { .driver = { .name = "samsung-pwm", .pm = &pwm_samsung_pm_ops, .of_match_table = of_match_ptr(samsung_pwm_matches), }, .probe = pwm_samsung_probe, .remove = pwm_samsung_remove,};module_platform_driver(pwm_samsung_driver);

ret = pwmchip_add(&chip->chip); if (ret < 0) { dev_err(dev, "failed to register PWM chip/n"); clk_disable_unprepare(chip->base_clk); return ret; }

static const struct pwm_ops pwm_samsung_ops = { .request = pwm_samsung_request, .free = pwm_samsung_free, .enable = pwm_samsung_enable, .disable = pwm_samsung_disable, .config = pwm_samsung_config, .set_polarity = pwm_samsung_set_polarity, .owner = THIS_MODULE,};

static const struct of_device_id samsung_pwm_matches[] = { { .compatible = "samsung,s3c2410-pwm", .data = &s3c24xx_variant }, { .compatible = "samsung,s3c6400-pwm", .data = &s3c64xx_variant }, { .compatible = "samsung,s5p6440-pwm", .data = &s5p64x0_variant }, { .compatible = "samsung,s5pc100-pwm", .data = &s5pc100_variant }, { .compatible = "samsung,exynos4210-pwm", .data = &s5p64x0_variant }, {},};MODULE_DEVICE_TABLE(of, samsung_pwm_matches);static int pwm_samsung_parse_dt(struct samsung_pwm_chip *chip){ struct device_node *np = chip->chip.dev->of_node; const struct of_device_id *match; struct property *prop; const __be32 *cur; u32 val; match = of_match_node(samsung_pwm_matches, np); if (!match) return -ENODEV; memcpy(&chip->variant, match->data, sizeof(chip->variant)); of_property_for_each_u32(np, "samsung,pwm-outputs", prop, cur, val) { if (val >= SAMSUNG_PWM_NUM) {  dev_err(chip->chip.dev,  "%s: invalid channel index in samsung,pwm-outputs property/n",    __func__);  continue; } chip->variant.output_mask |= BIT(val); } return 0;}