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119 lines
3.3 KiB
Diff
119 lines
3.3 KiB
Diff
From b8d251412bc4c420f33920c2d9492076fc7b9624 Mon Sep 17 00:00:00 2001
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From: Andy Green <andy@openmoko.com>
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Date: Sun, 13 Apr 2008 07:25:52 +0100
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Subject: [PATCH] add-gta02-pcb-revision-detect.patch
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Add function
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int gta02_get_pcb_revision(void)
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which returns state of GTA02 PCB revision pins. It is also called
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and logged during boot with KERN_INFO. The results look like:
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b9 b8 b2 b1 b0
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GPD4 GPD3 GPD0 GPC15 GPC13
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GTA02 A5 and before: 0x000
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GTA02 A6 : 0x001
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Signed-off-by: Andy Green <andy@openmoko.com>
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---
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arch/arm/mach-s3c2440/mach-gta02.c | 55 +++++++++++++++++++++++++++++++++-
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include/asm-arm/arch-s3c2410/gta02.h | 9 +++++
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2 files changed, 63 insertions(+), 1 deletions(-)
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diff --git a/arch/arm/mach-s3c2440/mach-gta02.c b/arch/arm/mach-s3c2440/mach-gta02.c
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index 99206ee..a2a63fe 100644
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--- a/arch/arm/mach-s3c2440/mach-gta02.c
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+++ b/arch/arm/mach-s3c2440/mach-gta02.c
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@@ -320,6 +320,59 @@ FIQ_HANDLER_ENTRY(256, 512)
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FIQ_HANDLER_END()
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+/**
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+ * returns PCB revision information in b9,b8 and b2,b1,b0
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+ * Pre-GTA02 A6 returns 0x000
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+ * GTA02 A6 returns 0x101
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+ * ...
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+ */
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+
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+int gta02_get_pcb_revision(void)
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+{
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+ int n;
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+ int u = 0;
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+ static unsigned long pinlist[] = {
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+ GTA02_PCB_ID1_0,
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+ GTA02_PCB_ID1_1,
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+ GTA02_PCB_ID1_2,
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+ GTA02_PCB_ID2_0,
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+ GTA02_PCB_ID2_1,
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+ };
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+ static int pin_offset[] = {
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+ 0, 1, 2, 8, 9
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+ };
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+
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+ for (n = 0 ; n < ARRAY_SIZE(pinlist); n++) {
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+ /*
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+ * set the PCB version GPIO to be pulled-down input
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+ * force low briefly first
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+ */
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+ s3c2410_gpio_cfgpin(pinlist[n], S3C2410_GPIO_OUTPUT);
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+ s3c2410_gpio_setpin(pinlist[n], 0);
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+ /* misnomer: it is a pullDOWN in 2442 */
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+ s3c2410_gpio_pullup(pinlist[n], 1);
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+ s3c2410_gpio_cfgpin(pinlist[n], S3C2410_GPIO_INPUT);
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+
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+ udelay(10);
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+
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+ if (s3c2410_gpio_getpin(pinlist[n]))
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+ u |= 1 << pin_offset[n];
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+
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+ /*
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+ * when not being interrogated, all of the revision GPIO
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+ * are set to output HIGH without pulldown so no current flows
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+ * if they are NC or pulled up.
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+ */
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+ s3c2410_gpio_setpin(pinlist[n], 1);
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+ s3c2410_gpio_cfgpin(pinlist[n], S3C2410_GPIO_OUTPUT);
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+ /* misnomer: it is a pullDOWN in 2442 */
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+ s3c2410_gpio_pullup(pinlist[n], 0);
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+ }
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+
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+ return u;
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+}
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+
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+
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static struct map_desc gta02_iodesc[] __initdata = {
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{
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.virtual = 0xe0000000,
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@@ -911,7 +964,7 @@ void gat02_lis302dl_suspend_io(struct lis302dl_info *lis, int resume)
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s3c2410_gpio_pullup(pdata->pin_miso, 0);
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}
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-const struct lis302dl_platform_data lis302_pdata[] = {
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+struct lis302dl_platform_data lis302_pdata[] = {
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{
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.name = "lis302-1 (top)",
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.pin_chip_select= S3C2410_GPD12,
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diff --git a/include/asm-arm/arch-s3c2410/gta02.h b/include/asm-arm/arch-s3c2410/gta02.h
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index f686a7a..791ea4f 100644
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--- a/include/asm-arm/arch-s3c2410/gta02.h
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+++ b/include/asm-arm/arch-s3c2410/gta02.h
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@@ -97,4 +97,13 @@
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#define GTA02v3_IRQ_nUSB_FLT IRQ_EINT18 /* v3 + v4 only */
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#define GTA02v3_IRQ_nGSM_OC IRQ_EINT19 /* v3 + v4 only */
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+/* returns 00 000 on GTA02 A5 and earlier, A6 returns 01 001 */
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+#define GTA02_PCB_ID1_0 S3C2410_GPC13
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+#define GTA02_PCB_ID1_1 S3C2410_GPC15
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+#define GTA02_PCB_ID1_2 S3C2410_GPD0
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+#define GTA02_PCB_ID2_0 S3C2410_GPD3
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+#define GTA02_PCB_ID2_1 S3C2410_GPD4
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+
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+int gta02_get_pcb_revision(void);
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+
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#endif /* _GTA02_H */
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--
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1.5.6.5
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