On the upcoming RK3288 SoC contain some unrouted pins in their banks. So while
for example pin8 of bank5 stays pin8 with all its settings (register offset etc),
pins 0 to 7 are not routed outside the SoC at all.
Therefore add a flag to mark these unrouted iomuxes to prevent people from using
them.
Signed-off-by: Heiko Stuebner <heiko@xxxxxxxxx>
---
drivers/pinctrl/pinctrl-rockchip.c | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/drivers/pinctrl/pinctrl-rockchip.c b/drivers/pinctrl/pinctrl-rockchip.c
index 115c75d..c8920f5 100644
--- a/drivers/pinctrl/pinctrl-rockchip.c
+++ b/drivers/pinctrl/pinctrl-rockchip.c
@@ -70,6 +70,7 @@ enum rockchip_pinctrl_type {
#define IOMUX_GPIO_ONLY BIT(0)
#define IOMUX_WIDTH_4BIT BIT(1)
#define IOMUX_SOURCE_PMU BIT(2)
+#define IOMUX_UNROUTED BIT(3)
/**
* @type: iomux variant using IOMUX_* constants
@@ -386,6 +387,11 @@ static int rockchip_get_mux(struct rockchip_pin_bank *bank, int pin)
if (iomux_num > 3)
return -EINVAL;
+ if (bank->iomux[iomux_num].type & IOMUX_UNROUTED) {
+ dev_err(info->dev, "pin %d is unrouted\n", pin);
+ return -EINVAL;
+ }
+
if (bank->iomux[iomux_num].type & IOMUX_GPIO_ONLY)
return RK_FUNC_GPIO;
@@ -436,6 +442,11 @@ static int rockchip_set_mux(struct rockchip_pin_bank *bank, int pin, int mux)
if (iomux_num > 3)
return -EINVAL;
+ if (bank->iomux[iomux_num].type & IOMUX_UNROUTED) {
+ dev_err(info->dev, "pin %d is unrouted\n", pin);
+ return -EINVAL;
+ }
+
if (bank->iomux[iomux_num].type & IOMUX_GPIO_ONLY) {
if (mux != RK_FUNC_GPIO) {
dev_err(info->dev,
--
1.9.0
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