iio: trigger: stm32-timer: add support for STM32H7

Add support for STM32H7 timer triggers:
- Add new valids_table
- Introduce compatible, with configuration data
- Extend up to 15 timers, available on STM32H7

Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

2 files changed, 53 insertions, 4 deletions

diff --git a/drivers/iio/trigger/stm32-timer-trigger.c b/drivers/iio/trigger/stm32-timer-trigger.c
index d22bc56dd9fc..33890f9ad11b 100644
--- a/drivers/iio/trigger/stm32-timer-trigger.c
+++ b/drivers/iio/trigger/stm32-timer-trigger.c
@@ -13,6 +13,7 @@
 #include <linux/mfd/stm32-timers.h>
 #include <linux/module.h>
 #include <linux/platform_device.h>
+#include <linux/of_device.h>
 
 #define MAX_TRIGGERS 7
 #define MAX_VALIDS 5
@@ -31,6 +32,9 @@ static const void *triggers_table[][MAX_TRIGGERS] = {
         { }, /* timer 10 */
         { }, /* timer 11 */
         { TIM12_TRGO, TIM12_CH1, TIM12_CH2,},
+        { }, /* timer 13 */
+        { }, /* timer 14 */
+        { TIM15_TRGO,},
 };
 
 /* List the triggers accepted by each timer */
@@ -49,6 +53,24 @@ static const void *valids_table[][MAX_VALIDS] = {
         { TIM4_TRGO, TIM5_TRGO,},
 };
 
+static const void *stm32h7_valids_table[][MAX_VALIDS] = {
+        { TIM15_TRGO, TIM2_TRGO, TIM3_TRGO, TIM4_TRGO,},
+        { TIM1_TRGO, TIM8_TRGO, TIM3_TRGO, TIM4_TRGO,},
+        { TIM1_TRGO, TIM2_TRGO, TIM15_TRGO, TIM4_TRGO,},
+        { TIM1_TRGO, TIM2_TRGO, TIM3_TRGO, TIM8_TRGO,},
+        { TIM1_TRGO, TIM8_TRGO, TIM3_TRGO, TIM4_TRGO,},
+        { }, /* timer 6 */
+        { }, /* timer 7 */
+        { TIM1_TRGO, TIM2_TRGO, TIM4_TRGO, TIM5_TRGO,},
+        { }, /* timer 9 */
+        { }, /* timer 10 */
+        { }, /* timer 11 */
+        { TIM4_TRGO, TIM5_TRGO,},
+        { }, /* timer 13 */
+        { }, /* timer 14 */
+        { TIM1_TRGO, TIM3_TRGO,},
+};
+
 struct stm32_timer_trigger {
         struct device *dev;
         struct regmap *regmap;
@@ -59,6 +81,11 @@ struct stm32_timer_trigger {
         bool has_trgo2;
 };
 
+struct stm32_timer_trigger_cfg {
+        const void *(*valids_table)[MAX_VALIDS];
+        const unsigned int num_valids_table;
+};
+
 static bool stm32_timer_is_trgo2_name(const char *name)
 {
         return !!strstr(name, "trgo2");
@@ -734,18 +761,22 @@ static int stm32_timer_trigger_probe(struct platform_device *pdev)
         struct device *dev = &pdev->dev;
         struct stm32_timer_trigger *priv;
         struct stm32_timers *ddata = dev_get_drvdata(pdev->dev.parent);
+        const struct stm32_timer_trigger_cfg *cfg;
         unsigned int index;
         int ret;
 
         if (of_property_read_u32(dev->of_node, "reg", &index))
                 return -EINVAL;
 
+        cfg = (const struct stm32_timer_trigger_cfg *)
+                of_match_device(dev->driver->of_match_table, dev)->data;
+
         if (index >= ARRAY_SIZE(triggers_table) ||
-            index >= ARRAY_SIZE(valids_table))
+            index >= cfg->num_valids_table)
                 return -EINVAL;
 
         /* Create an IIO device only if we have triggers to be validated */
-        if (*valids_table[index])
+        if (*cfg->valids_table[index])
                 priv = stm32_setup_counter_device(dev);
         else
                 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
@@ -758,7 +789,7 @@ static int stm32_timer_trigger_probe(struct platform_device *pdev)
         priv->clk = ddata->clk;
         priv->max_arr = ddata->max_arr;
         priv->triggers = triggers_table[index];
-        priv->valids = valids_table[index];
+        priv->valids = cfg->valids_table[index];
         stm32_timer_detect_trgo2(priv);
 
         ret = stm32_setup_iio_triggers(priv);
@@ -770,8 +801,24 @@ static int stm32_timer_trigger_probe(struct platform_device *pdev)
         return 0;
 }
 
+static const struct stm32_timer_trigger_cfg stm32_timer_trg_cfg = {
+        .valids_table = valids_table,
+        .num_valids_table = ARRAY_SIZE(valids_table),
+};
+
+static const struct stm32_timer_trigger_cfg stm32h7_timer_trg_cfg = {
+        .valids_table = stm32h7_valids_table,
+        .num_valids_table = ARRAY_SIZE(stm32h7_valids_table),
+};
+
 static const struct of_device_id stm32_trig_of_match[] = {
-        { .compatible = "st,stm32-timer-trigger", },
+        {
+                .compatible = "st,stm32-timer-trigger",
+                .data = (void *)&stm32_timer_trg_cfg,
+        }, {
+                .compatible = "st,stm32h7-timer-trigger",
+                .data = (void *)&stm32h7_timer_trg_cfg,
+        },
         { /* end node */ },
 };
 MODULE_DEVICE_TABLE(of, stm32_trig_of_match);
diff --git a/include/linux/iio/timer/stm32-timer-trigger.h b/include/linux/iio/timer/stm32-timer-trigger.h
index fa7d786ed99e..20f465353a7c 100644
--- a/include/linux/iio/timer/stm32-timer-trigger.h
+++ b/include/linux/iio/timer/stm32-timer-trigger.h
@@ -59,6 +59,8 @@
 #define TIM12_CH1       "tim12_ch1"
 #define TIM12_CH2       "tim12_ch2"
 
+#define TIM15_TRGO      "tim15_trgo"
+
 bool is_stm32_timer_trigger(struct iio_trigger *trig);
 
 #endif