diff options
Diffstat (limited to 'drivers/pwm')
| -rw-r--r-- | drivers/pwm/pwm-sti.c | 45 |
1 files changed, 38 insertions, 7 deletions
diff --git a/drivers/pwm/pwm-sti.c b/drivers/pwm/pwm-sti.c index 711c33643259..6d3e3850923b 100644 --- a/drivers/pwm/pwm-sti.c +++ b/drivers/pwm/pwm-sti.c @@ -11,6 +11,7 @@ */ #include <linux/clk.h> +#include <linux/interrupt.h> #include <linux/math64.h> #include <linux/mfd/syscon.h> #include <linux/module.h> @@ -18,8 +19,10 @@ #include <linux/platform_device.h> #include <linux/pwm.h> #include <linux/regmap.h> +#include <linux/sched.h> #include <linux/slab.h> #include <linux/time.h> +#include <linux/wait.h> #define PWM_OUT_VAL(x) (0x00 + (4 * (x))) /* Device's Duty Cycle register */ #define PWM_CPT_VAL(x) (0x10 + (4 * (x))) /* Capture value */ @@ -64,9 +67,17 @@ enum sti_cpt_edge { CPT_EDGE_BOTH, }; +struct sti_cpt_ddata { + u32 snapshot[3]; + unsigned int index; + struct mutex lock; + wait_queue_head_t wait; +}; + struct sti_pwm_compat_data { const struct reg_field *reg_fields; - unsigned int num_devs; + unsigned int pwm_num_devs; + unsigned int cpt_num_devs; unsigned int max_pwm_cnt; unsigned int max_prescale; }; @@ -307,10 +318,15 @@ static int sti_pwm_probe_dt(struct sti_pwm_chip *pc) struct device_node *np = dev->of_node; struct sti_pwm_compat_data *cdata = pc->cdata; u32 num_devs; + int ret; - of_property_read_u32(np, "st,pwm-num-chan", &num_devs); - if (num_devs) - cdata->num_devs = num_devs; + ret = of_property_read_u32(np, "st,pwm-num-chan", &num_devs); + if (!ret) + cdata->pwm_num_devs = num_devs; + + ret = of_property_read_u32(np, "st,capture-num-chan", &num_devs); + if (!ret) + cdata->cpt_num_devs = num_devs; reg_fields = cdata->reg_fields; @@ -350,6 +366,7 @@ static int sti_pwm_probe(struct platform_device *pdev) struct sti_pwm_compat_data *cdata; struct sti_pwm_chip *pc; struct resource *res; + unsigned int i; int ret; pc = devm_kzalloc(dev, sizeof(*pc), GFP_KERNEL); @@ -378,7 +395,8 @@ static int sti_pwm_probe(struct platform_device *pdev) cdata->reg_fields = &sti_pwm_regfields[0]; cdata->max_prescale = 0xff; cdata->max_pwm_cnt = 255; - cdata->num_devs = 1; + cdata->pwm_num_devs = 1; + cdata->cpt_num_devs = 0; pc->cdata = cdata; pc->dev = dev; @@ -416,7 +434,7 @@ static int sti_pwm_probe(struct platform_device *pdev) pc->chip.dev = dev; pc->chip.ops = &sti_pwm_ops; pc->chip.base = -1; - pc->chip.npwm = pc->cdata->num_devs; + pc->chip.npwm = pc->cdata->pwm_num_devs; pc->chip.can_sleep = true; ret = pwmchip_add(&pc->chip); @@ -426,6 +444,19 @@ static int sti_pwm_probe(struct platform_device *pdev) return ret; } + for (i = 0; i < cdata->cpt_num_devs; i++) { + struct sti_cpt_ddata *ddata; + + ddata = devm_kzalloc(dev, sizeof(*ddata), GFP_KERNEL); + if (!ddata) + return -ENOMEM; + + init_waitqueue_head(&ddata->wait); + mutex_init(&ddata->lock); + + pwm_set_chip_data(&pc->chip.pwms[i], ddata); + } + platform_set_drvdata(pdev, pc); return 0; @@ -436,7 +467,7 @@ static int sti_pwm_remove(struct platform_device *pdev) struct sti_pwm_chip *pc = platform_get_drvdata(pdev); unsigned int i; - for (i = 0; i < pc->cdata->num_devs; i++) + for (i = 0; i < pc->cdata->pwm_num_devs; i++) pwm_disable(&pc->chip.pwms[i]); clk_unprepare(pc->pwm_clk); |