Hi Patrice,
On 20 September 2018 at 07:37, Patrice Chotard patrice.chotard@st.com wrote:
pinmux_show allows to display the muxing of all pins belonging to pin-controller.
Signed-off-by: Patrice Chotard patrice.chotard@st.com
drivers/pinctrl/pinctrl_stm32.c | 79 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 79 insertions(+)
The only thing I don't like about this is that it is quite SoC-specific. I am hoping we can make it more generic.
diff --git a/drivers/pinctrl/pinctrl_stm32.c b/drivers/pinctrl/pinctrl_stm32.c index 31285cdd5784..a477035bf420 100644 --- a/drivers/pinctrl/pinctrl_stm32.c +++ b/drivers/pinctrl/pinctrl_stm32.c @@ -14,6 +14,16 @@ DECLARE_GLOBAL_DATA_PTR; #define OTYPE_MSK 1 #define AFR_MASK 0xF
+#define PINMUX_MODE_COUNT 5
+static const char * const pinmux_mode[PINMUX_MODE_COUNT] = {
"gpio input","gpio output","analog","unknown","alt function",+};
static int stm32_gpio_config(struct gpio_desc *desc, const struct stm32_gpio_ctl *ctl) { @@ -176,12 +186,81 @@ static int stm32_pinctrl_set_state_simple(struct udevice *dev, } #endif /* PINCTRL_FULL */
+static int stm32_pinctrl_get_af(struct udevice *dev, unsigned int offset) +{
struct stm32_gpio_priv *priv = dev_get_priv(dev);struct stm32_gpio_regs *regs = priv->regs;u32 af;u32 alt_shift = (offset % 8) * 4;u32 alt_index = offset / 8;af = (readl(®s->afr[alt_index]) &GENMASK(alt_shift + 3, alt_shift)) >> alt_shift;return af;+}
+static int stm32_pinmux_show(struct udevice *dev) +{
struct udevice *child;struct udevice *dev_gpio;const char *bank_name;const char *label;int offset;int ret;int num_bits;int mode;int af_num;/* parse pin-controller sub-nodes, ie gpio bank nodes */list_for_each_entry(child, &dev->child_head, sibling_node) {ret = uclass_get_device_by_name(UCLASS_GPIO, child->name,&dev_gpio);
I wonder to what extend this is actually different from 'gpio status'?
if (ret < 0 && ret != -ENODEV) {dev_err(dev, "Failed to find %s device ret = %d\n",child->name, ret);return ret;}if (!ret) {bank_name = gpio_get_bank_info(dev_gpio, &num_bits);printf("\nBank %s:\n", bank_name);for (offset = 0; offset < num_bits; offset++) {mode = gpio_get_raw_function(dev_gpio,offset, &label);printf("%s%d: %s", bank_name, offset,pinmux_mode[mode]);switch (mode) {case GPIOF_FUNC:af_num = stm32_pinctrl_get_af(dev_gpio,offset);printf(" %d", af_num);break;case STM32_GPIO_MODE_OUT:
How come you cannot use GPIOF_OUTPUT here?
case STM32_GPIO_MODE_IN:printf(" %s", label ? label : "");break;}printf("\n");}}if (!child)break;}return 0;+}
static struct pinctrl_ops stm32_pinctrl_ops = { #if CONFIG_IS_ENABLED(PINCTRL_FULL) .set_state = stm32_pinctrl_set_state, #else /* PINCTRL_FULL */ .set_state_simple = stm32_pinctrl_set_state_simple, #endif /* PINCTRL_FULL */
.pinmux_show = stm32_pinmux_show,};
static const struct udevice_id stm32_pinctrl_ids[] = {
1.9.1
Regards, Simon