Hi Alexander,
On 1/15/24 14:30, Alexander Stein wrote:
Hi Hector,
thanks for the patch.
Am Montag, 15. Januar 2024, 14:16:05 CET schrieb Hector Palacios:
According to NXP HRM for i.MX93, the following GPIO pins are available:
- GPIO1: 16 pins (0..15)
Mh, RM Rev4 (12/2023) says:
Bit[31:17] should be Reserved for GPIO1
So GPIO1 has the range 0..16
- GPIO2: 30 pins (0..29)
- GPIO3: 32 pins (0..31)
- GPIO4: 30 pins (0..29)
RM Rev4 (12/2023) says:
Bit[31:28] should be Reserved for GPIO4
So GPIO4 would be the range 0..27
Where did you get your numbers from?
I also saw what you point out about the HRM but when cross-checking with
the IOMUXC topic (Chapter 27) to verify what pads can work as GPIO for
each of the ports, I found you can configure pads for
- GPIO1_IO00..GPIO1_IO15
- GPIO2_IO00..GPIO2_IO29
- GPIO3_IO00..GPIO3_IO31
- GPIO4_IO00..GPIO4_IO29
which doesn't exactly match the note about the reserved bits.
I consider the IOMUXC topic more reliable but it would definitely be
better if someone from NXP could clarify.
Regards
--
Héctor Palacios
Signed-off-by: Hector Palacios <hector.palacios@xxxxxxxx>
---
arch/arm64/boot/dts/freescale/imx93.dtsi | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/arch/arm64/boot/dts/freescale/imx93.dtsi
b/arch/arm64/boot/dts/freescale/imx93.dtsi index 34c0540276d1..7eb2cab7c749
100644
--- a/arch/arm64/boot/dts/freescale/imx93.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx93.dtsi
@@ -970,6 +970,7 @@ gpio2: gpio@43810000 {
<&clk IMX93_CLK_GPIO2_GATE>;
clock-names = "gpio", "port";
gpio-ranges = <&iomuxc 0 4 30>;
+ ngpios = <30>;
};
gpio3: gpio@43820000 {
@@ -986,6 +987,7 @@ gpio3: gpio@43820000 {
clock-names = "gpio", "port";
gpio-ranges = <&iomuxc 0 84 8>, <&iomuxc 8 66
18>,
<&iomuxc 26 34 2>, <&iomuxc 28 0
4>;
+ ngpios = <32>;
};
gpio4: gpio@43830000 {
@@ -1001,6 +1003,7 @@ gpio4: gpio@43830000 {
<&clk IMX93_CLK_GPIO4_GATE>;
clock-names = "gpio", "port";
gpio-ranges = <&iomuxc 0 38 28>, <&iomuxc 28 36
2>;
+ ngpios = <30>;
};
gpio1: gpio@47400000 {
@@ -1016,6 +1019,7 @@ gpio1: gpio@47400000 {
<&clk IMX93_CLK_GPIO1_GATE>;
clock-names = "gpio", "port";
gpio-ranges = <&iomuxc 0 92 16>;
+ ngpios = <16>;
};
ocotp: efuse@47510000 {
