[PATCH] ARM: dts: AM33xx-l4: add gpio-ranges

Drew Fustini
2020-06-02T13:14:38Z

Add gpio-ranges properties to the gpio controller nodes.

These gpio-ranges were created based on "Table 9-10. CONTROL_MODULE
REGISTERS" in the "AM335x Technical Reference Manual" [0] and "Table
4-2. Pin Attributes" in the "AM335x Sitara Processor datasheet" [1].
A csv file with this data is available for reference [2].

[0] https://www.ti.com/lit/ug/spruh73q/spruh73q.pdf
[1] http://www.ti.com/lit/ds/symlink/am3358.pdf
[2] https://gist.github.com/pdp7/6ffaddc8867973c1c3e8612cfaf72020

Signed-off-by: Drew Fustini <drew@beagleboard.org>
---
Notes:
There was previous dicussion relevant to this patch:
https://lore.kernel.org/linux-gpio/20200525131731.GA948395@x1/

Here is the list I compiled which shows the mapping between a gpioline
and the pin number including the memory address for the pin control
register

gpiochip,gpio-line,pinctrl-PIN,pinctrl-address
0,0,82,44e10948
0,1,83,44e1094c
0,2,84,44e10950
0,3,85,44e10954
0,4,86,44e10958
0,5,87,44e1095c
0,6,88,44e10960
0,7,89,44e10964
0,8,52,44e108d0
0,9,53,44e108d4
0,10,54,44e108d8
0,11,55,44e108dc
0,12,94,44e10978
0,13,95,44e1097c
0,14,96,44e10980
0,15,97,44e10984
0,16,71,44e1091c
0,17,72,44e10920
0,18,135,44e10a1c
0,19,108,44e109b0
0,20,109,44e109b4
0,21,73,44e10924
0,22,8,44e10820
0,23,9,44e10824
0,26,10,44e10828
0,27,11,44e1082c
0,28,74,44e10928
0,29,81,44e10944
0,30,28,44e10870
0,31,29,44e10874
1,0,0,44e10800
1,1,1,44e10804
1,2,2,44e10808
1,3,3,44e1080c
1,4,4,44e10810
1,5,5,44e10814
1,6,6,44e10818
1,7,7,44e1081c
1,8,90,44e10968
1,9,91,44e1096c
1,10,92,44e10970
1,11,93,44e10974
1,12,12,44e10830
1,13,13,44e10834
1,14,14,44e10838
1,15,15,44e1083c
1,16,16,44e10840
1,17,17,44e10844
1,18,18,44e10848
1,19,19,44e1084c
1,20,20,44e10850
1,21,21,44e10854
1,22,22,44e10858
1,23,23,44e1085c
1,24,24,44e10860
1,25,25,44e10864
1,26,26,44e10868
1,27,27,44e1086c
1,28,30,44e10878
1,29,31,44e1087c
1,30,32,44e10880
1,31,33,44e10884
2,0,34,44e10888
2,1,35,44e1088c
2,2,36,44e10890
2,3,37,44e10894
2,4,38,44e10898
2,5,39,44e1089c
2,6,40,44e108a0
2,7,41,44e108a4
2,8,42,44e108a8
2,9,43,44e108ac
2,10,44,44e108b0
2,11,45,44e108b4
2,12,46,44e108b8
2,13,47,44e108bc
2,14,48,44e108c0
2,15,49,44e108c4
2,16,50,44e108c8
2,17,51,44e108cc
2,18,77,44e10934
2,19,78,44e10938
2,20,79,44e1093c
2,21,80,44e10940
2,22,56,44e108e0
2,23,57,44e108e4
2,24,58,44e108e8
2,25,59,44e108ec
2,26,60,44e108f0
2,27,61,44e108f4
2,28,62,44e108f8
2,29,63,44e108fc
2,30,64,44e10900
2,31,65,44e10904
3,0,66,44e10908
3,1,67,44e1090c
3,2,68,44e10910
3,3,69,44e10914
3,4,70,44e10918
3,5,98,44e10988
3,6,99,44e1098c
3,9,75,44e1092c
3,10,76,44e10930
3,13,141,44e10a34
3,14,100,44e10990
3,15,101,44e10994
3,16,102,44e10998
3,17,103,44e1099c
3,18,104,44e109a0
3,19,105,44e109a4
3,20,106,44e109a8
3,21,107,44e109ac

On a BeagleBlack Black board (AM3358) with this patch:
cat /sys/kernel/debug/pinctrl/44e10800.pinmux-pinctrl-single/gpio-ranges

GPIO ranges handled:
0: gpio-0-31 GPIOS [0 - 7] PINS [82 - 89]
8: gpio-0-31 GPIOS [8 - 11] PINS [52 - 55]
12: gpio-0-31 GPIOS [12 - 15] PINS [94 - 97]
16: gpio-0-31 GPIOS [16 - 17] PINS [71 - 72]
18: gpio-0-31 GPIOS [18 - 18] PINS [135 - 135]
19: gpio-0-31 GPIOS [19 - 20] PINS [108 - 109]
21: gpio-0-31 GPIOS [21 - 21] PINS [73 - 73]
22: gpio-0-31 GPIOS [22 - 23] PINS [8 - 9]
26: gpio-0-31 GPIOS [26 - 27] PINS [10 - 11]
28: gpio-0-31 GPIOS [28 - 28] PINS [74 - 74]
29: gpio-0-31 GPIOS [29 - 29] PINS [81 - 81]
30: gpio-0-31 GPIOS [30 - 31] PINS [28 - 29]
0: gpio-32-63 GPIOS [32 - 39] PINS [0 - 7]
8: gpio-32-63 GPIOS [40 - 43] PINS [90 - 93]
12: gpio-32-63 GPIOS [44 - 59] PINS [12 - 27]
28: gpio-32-63 GPIOS [60 - 63] PINS [30 - 33]
0: gpio-64-95 GPIOS [64 - 81] PINS [34 - 51]
18: gpio-64-95 GPIOS [82 - 85] PINS [77 - 80]
22: gpio-64-95 GPIOS [86 - 95] PINS [56 - 65]
0: gpio-96-127 GPIOS [96 - 100] PINS [66 - 70]
5: gpio-96-127 GPIOS [101 - 102] PINS [98 - 99]
7: gpio-96-127 GPIOS [103 - 104] PINS [75 - 76]
13: gpio-96-127 GPIOS [109 - 109] PINS [141 - 141]
14: gpio-96-127 GPIOS [110 - 117] PINS [100 - 107]

arch/arm/boot/dts/am33xx-l4.dtsi | 24 ++++++++++++++++++++++++
1 file changed, 24 insertions(+)

diff --git a/arch/arm/boot/dts/am33xx-l4.dtsi b/arch/arm/boot/dts/am33xx-l4.dtsi
index 5ed7f3c58c0f..340ea331e54d 100644
--- a/arch/arm/boot/dts/am33xx-l4.dtsi
+++ b/arch/arm/boot/dts/am33xx-l4.dtsi
@@ -151,6 +151,18 @@ SYSC_OMAP2_SOFTRESET |

gpio0: gpio@0 {
compatible = "ti,omap4-gpio";
+ gpio-ranges = <&am33xx_pinmux 0 82 8>,
+ <&am33xx_pinmux 8 52 4>,
+ <&am33xx_pinmux 12 94 4>,
+ <&am33xx_pinmux 16 71 2>,
+ <&am33xx_pinmux 18 135 1>,
+ <&am33xx_pinmux 19 108 2>,
+ <&am33xx_pinmux 21 73 1>,
+ <&am33xx_pinmux 22 8 2>,
+ <&am33xx_pinmux 26 10 2>,
+ <&am33xx_pinmux 28 74 1>,
+ <&am33xx_pinmux 29 81 1>,
+ <&am33xx_pinmux 30 28 2>;
gpio-controller;
#gpio-cells = <2>;
interrupt-controller;
@@ -1298,6 +1310,10 @@ SYSC_OMAP2_SOFTRESET |

gpio1: gpio@0 {
compatible = "ti,omap4-gpio";
+ gpio-ranges = <&am33xx_pinmux 0 0 8>,
+ <&am33xx_pinmux 8 90 4>,
+ <&am33xx_pinmux 12 12 16>,
+ <&am33xx_pinmux 28 30 4>;
gpio-controller;
#gpio-cells = <2>;
interrupt-controller;
@@ -1700,6 +1716,9 @@ SYSC_OMAP2_SOFTRESET |

gpio2: gpio@0 {
compatible = "ti,omap4-gpio";
+ gpio-ranges = <&am33xx_pinmux 0 34 18>,
+ <&am33xx_pinmux 18 77 4>,
+ <&am33xx_pinmux 22 56 10>;
gpio-controller;
#gpio-cells = <2>;
interrupt-controller;
@@ -1733,6 +1752,11 @@ SYSC_OMAP2_SOFTRESET |

gpio3: gpio@0 {
compatible = "ti,omap4-gpio";
+ gpio-ranges = <&am33xx_pinmux 0 66 5>,
+ <&am33xx_pinmux 5 98 2>,
+ <&am33xx_pinmux 7 75 2>,
+ <&am33xx_pinmux 13 141 1>,
+ <&am33xx_pinmux 14 100 8>;
gpio-controller;
#gpio-cells = <2>;
interrupt-controller;
--
2.25.1