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From fffb5d650929cf49a3e3f200bea1d5472de56794 Mon Sep 17 00:00:00 2001
From: Andy Green <andy@openmoko.com>
Date: Fri, 25 Jul 2008 23:06:02 +0100
Subject: [PATCH] add-gta02-pcb-revision-detect.patch
Add function
int gta02_get_pcb_revision(void)
which returns state of GTA02 PCB revision pins. It is also called
and logged during boot with KERN_INFO. The results look like:
b9 b8 b2 b1 b0
GPD4 GPD3 GPD0 GPC15 GPC13
GTA02 A5 and before: 0x000
GTA02 A6 : 0x001
Signed-off-by: Andy Green <andy@openmoko.com>
---
arch/arm/mach-s3c2440/mach-gta02.c | 55 +++++++++++++++++++++++++++++++++-
include/asm-arm/arch-s3c2410/gta02.h | 9 +++++
2 files changed, 63 insertions(+), 1 deletions(-)
diff --git a/arch/arm/mach-s3c2440/mach-gta02.c b/arch/arm/mach-s3c2440/mach-gta02.c
index 99206ee..a2a63fe 100644
--- a/arch/arm/mach-s3c2440/mach-gta02.c
+++ b/arch/arm/mach-s3c2440/mach-gta02.c
@@ -320,6 +320,59 @@ FIQ_HANDLER_ENTRY(256, 512)
FIQ_HANDLER_END()
+/**
+ * returns PCB revision information in b9,b8 and b2,b1,b0
+ * Pre-GTA02 A6 returns 0x000
+ * GTA02 A6 returns 0x101
+ * ...
+ */
+
+int gta02_get_pcb_revision(void)
+{
+ int n;
+ int u = 0;
+ static unsigned long pinlist[] = {
+ GTA02_PCB_ID1_0,
+ GTA02_PCB_ID1_1,
+ GTA02_PCB_ID1_2,
+ GTA02_PCB_ID2_0,
+ GTA02_PCB_ID2_1,
+ };
+ static int pin_offset[] = {
+ 0, 1, 2, 8, 9
+ };
+
+ for (n = 0 ; n < ARRAY_SIZE(pinlist); n++) {
+ /*
+ * set the PCB version GPIO to be pulled-down input
+ * force low briefly first
+ */
+ s3c2410_gpio_cfgpin(pinlist[n], S3C2410_GPIO_OUTPUT);
+ s3c2410_gpio_setpin(pinlist[n], 0);
+ /* misnomer: it is a pullDOWN in 2442 */
+ s3c2410_gpio_pullup(pinlist[n], 1);
+ s3c2410_gpio_cfgpin(pinlist[n], S3C2410_GPIO_INPUT);
+
+ udelay(10);
+
+ if (s3c2410_gpio_getpin(pinlist[n]))
+ u |= 1 << pin_offset[n];
+
+ /*
+ * when not being interrogated, all of the revision GPIO
+ * are set to output HIGH without pulldown so no current flows
+ * if they are NC or pulled up.
+ */
+ s3c2410_gpio_setpin(pinlist[n], 1);
+ s3c2410_gpio_cfgpin(pinlist[n], S3C2410_GPIO_OUTPUT);
+ /* misnomer: it is a pullDOWN in 2442 */
+ s3c2410_gpio_pullup(pinlist[n], 0);
+ }
+
+ return u;
+}
+
+
static struct map_desc gta02_iodesc[] __initdata = {
{
.virtual = 0xe0000000,
@@ -911,7 +964,7 @@ void gat02_lis302dl_suspend_io(struct lis302dl_info *lis, int resume)
s3c2410_gpio_pullup(pdata->pin_miso, 0);
}
-const struct lis302dl_platform_data lis302_pdata[] = {
+struct lis302dl_platform_data lis302_pdata[] = {
{
.name = "lis302-1 (top)",
.pin_chip_select= S3C2410_GPD12,
diff --git a/include/asm-arm/arch-s3c2410/gta02.h b/include/asm-arm/arch-s3c2410/gta02.h
index f686a7a..791ea4f 100644
--- a/include/asm-arm/arch-s3c2410/gta02.h
+++ b/include/asm-arm/arch-s3c2410/gta02.h
@@ -97,4 +97,13 @@
#define GTA02v3_IRQ_nUSB_FLT IRQ_EINT18 /* v3 + v4 only */
#define GTA02v3_IRQ_nGSM_OC IRQ_EINT19 /* v3 + v4 only */
+/* returns 00 000 on GTA02 A5 and earlier, A6 returns 01 001 */
+#define GTA02_PCB_ID1_0 S3C2410_GPC13
+#define GTA02_PCB_ID1_1 S3C2410_GPC15
+#define GTA02_PCB_ID1_2 S3C2410_GPD0
+#define GTA02_PCB_ID2_0 S3C2410_GPD3
+#define GTA02_PCB_ID2_1 S3C2410_GPD4
+
+int gta02_get_pcb_revision(void);
+
#endif /* _GTA02_H */
--
1.5.6.3
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