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Date: Thu, 3 Aug 2017 11:14:13 +0200
From: Fabrice Gasnier <fabrice.gasnier@...com>
To: <jic23@...nel.org>, <robh+dt@...nel.org>
CC: <linux@...linux.org.uk>, <mark.rutland@....com>,
<mcoquelin.stm32@...il.com>, <alexandre.torgue@...com>,
<lars@...afoo.de>, <knaack.h@....de>, <pmeerw@...erw.net>,
<fabrice.gasnier@...com>, <linux-iio@...r.kernel.org>,
<devicetree@...r.kernel.org>,
<linux-arm-kernel@...ts.infradead.org>,
<linux-kernel@...r.kernel.org>, <benjamin.gaignard@...aro.org>,
<benjamin.gaignard@...com>
Subject: [PATCH 2/3] 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@...com>
---
drivers/iio/trigger/stm32-timer-trigger.c | 55 +++++++++++++++++++++++++--
include/linux/iio/timer/stm32-timer-trigger.h | 2 +
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 d22bc56..33890f9 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 @@
{ }, /* 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 @@
{ 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 fa7d786..20f4653 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
--
1.9.1
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