1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
|
From 325afc09116e11e28265b648ef33d8c0306c61f1 Mon Sep 17 00:00:00 2001
From: Robert Nelson <robertcnelson@gmail.com>
Date: Thu, 23 Sep 2010 18:22:47 -0700
Subject: [PATCH 01/10] omap: Beagle: revision detection
Due to the omap3530 ES3.0 Silicon being used on both the
B5/B6 and C1/2/3 Beagle we can't use the cpu_is_omap34xx()
routines to differentiate the Beagle Boards.
However gpio pins 171,172,173 where setup for this prupose, so
lets use them.
Changes:
for older U-Boot's, use omap_mux_init_gpio()
keep Beagle Rev in board-omap3beagle.c
gpio_free on gpio request failure
Tested on Beagle Revisions: B5, C2, C4, and xMA
Signed-off-by: Robert Nelson <robertcnelson@gmail.com>
Acked-by: Jarkko Nikula <jhnikula@gmail.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
---
arch/arm/mach-omap2/board-omap3beagle.c | 88 +++++++++++++++++++++++++++++++
1 files changed, 88 insertions(+), 0 deletions(-)
diff --git a/arch/arm/mach-omap2/board-omap3beagle.c b/arch/arm/mach-omap2/board-omap3beagle.c
index 2677b41..7ca2b3b 100644
--- a/arch/arm/mach-omap2/board-omap3beagle.c
+++ b/arch/arm/mach-omap2/board-omap3beagle.c
@@ -175,6 +175,93 @@ static void __init omap3beagle_ks8851_init(void)
static inline void __init omap3beagle_ks8851_init(void) { return; }
#endif
+/*
+ * OMAP3 Beagle revision
+ * Run time detection of Beagle revision is done by reading GPIO.
+ * GPIO ID -
+ * AXBX = GPIO173, GPIO172, GPIO171: 1 1 1
+ * C1_3 = GPIO173, GPIO172, GPIO171: 1 1 0
+ * C4 = GPIO173, GPIO172, GPIO171: 1 0 1
+ * XM = GPIO173, GPIO172, GPIO171: 0 0 0
+ */
+enum {
+ OMAP3BEAGLE_BOARD_UNKN = 0,
+ OMAP3BEAGLE_BOARD_AXBX,
+ OMAP3BEAGLE_BOARD_C1_3,
+ OMAP3BEAGLE_BOARD_C4,
+ OMAP3BEAGLE_BOARD_XM,
+};
+
+static u8 omap3_beagle_version;
+
+static u8 omap3_beagle_get_rev(void)
+{
+ return omap3_beagle_version;
+}
+
+static void __init omap3_beagle_init_rev(void)
+{
+ int ret;
+ u16 beagle_rev = 0;
+
+ omap_mux_init_gpio(171, OMAP_PIN_INPUT_PULLUP);
+ omap_mux_init_gpio(172, OMAP_PIN_INPUT_PULLUP);
+ omap_mux_init_gpio(173, OMAP_PIN_INPUT_PULLUP);
+
+ ret = gpio_request(171, "rev_id_0");
+ if (ret < 0)
+ goto fail0;
+
+ ret = gpio_request(172, "rev_id_1");
+ if (ret < 0)
+ goto fail1;
+
+ ret = gpio_request(173, "rev_id_2");
+ if (ret < 0)
+ goto fail2;
+
+ gpio_direction_input(171);
+ gpio_direction_input(172);
+ gpio_direction_input(173);
+
+ beagle_rev = gpio_get_value(171) | (gpio_get_value(172) << 1)
+ | (gpio_get_value(173) << 2);
+
+ switch (beagle_rev) {
+ case 7:
+ printk(KERN_INFO "OMAP3 Beagle Rev: Ax/Bx\n");
+ omap3_beagle_version = OMAP3BEAGLE_BOARD_AXBX;
+ break;
+ case 6:
+ printk(KERN_INFO "OMAP3 Beagle Rev: C1/C2/C3\n");
+ omap3_beagle_version = OMAP3BEAGLE_BOARD_C1_3;
+ break;
+ case 5:
+ printk(KERN_INFO "OMAP3 Beagle Rev: C4\n");
+ omap3_beagle_version = OMAP3BEAGLE_BOARD_C4;
+ break;
+ case 0:
+ printk(KERN_INFO "OMAP3 Beagle Rev: xM\n");
+ omap3_beagle_version = OMAP3BEAGLE_BOARD_XM;
+ break;
+ default:
+ printk(KERN_INFO "OMAP3 Beagle Rev: unknown %hd\n", beagle_rev);
+ omap3_beagle_version = OMAP3BEAGLE_BOARD_UNKN;
+ }
+
+ return;
+
+fail2:
+ gpio_free(172);
+fail1:
+ gpio_free(171);
+fail0:
+ printk(KERN_ERR "Unable to get revision detection GPIO pins\n");
+ omap3_beagle_version = OMAP3BEAGLE_BOARD_UNKN;
+
+ return;
+}
+
static struct mtd_partition omap3beagle_nand_partitions[] = {
/* All the partition sizes are listed in terms of NAND block size */
{
@@ -853,6 +940,7 @@ static int __init cameraboard_setup(char *str)
static void __init omap3_beagle_init(void)
{
omap3_mux_init(board_mux, OMAP_PACKAGE_CBB);
+ omap3_beagle_init_rev();
omap3_beagle_i2c_init();
if (cpu_is_omap3630()) {
--
1.6.6.1
|
