pwm: stm32: add support for stm32mp25

Add support for STM32MP25 SoC.
IPIDR register is used to check the hardware configuration register
when available to gather the number of complementary outputs.

Signed-off-by: Cheick Traore <cheick.traore@foss.st.com>
Reviewed-by: Patrice Chotard <patrice.chotard@foss.st.com>

diff --git a/drivers/pwm/pwm-stm32.c b/drivers/pwm/pwm-stm32.c
index 5fa649b590359c97836cbc8709a23b3032592124..a691f75e4a71c3cb15271c9c2be61afaeda2ef60 100644 (file)
--- a/drivers/pwm/pwm-stm32.c
+++ b/drivers/pwm/pwm-stm32.c
@@ -12,6 +12,7 @@
 #include <asm/io.h>
 #include <asm/arch/timers.h>
 #include <dm/device_compat.h>
+#include <linux/bitfield.h>
 #include <linux/time.h>
 
 #define CCMR_CHANNEL_SHIFT     8
@@ -157,7 +158,14 @@ static void stm32_pwm_detect_complementary(struct udevice *dev)
 {
        struct stm32_timers_plat *plat = dev_get_plat(dev_get_parent(dev));
        struct stm32_pwm_priv *priv = dev_get_priv(dev);
-       u32 ccer;
+       u32 ccer, val;
+
+       if (plat->ipidr) {
+               /* Simply read from HWCFGR the number of complementary outputs (MP25). */
+               val = readl(plat->base + TIM_HWCFGR1);
+               priv->have_complementary_output = !!FIELD_GET(TIM_HWCFGR1_NB_OF_DT, val);
+               return;
+       }
 
        /*
         * If complementary bit doesn't exist writing 1 will have no
@@ -192,6 +200,7 @@ static const struct pwm_ops stm32_pwm_ops = {
 
 static const struct udevice_id stm32_pwm_ids[] = {
        { .compatible = "st,stm32-pwm" },
+       { .compatible = "st,stm32mp25-pwm" },
        { }
 };