mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2024-12-27 11:12:26 +02:00
a95f9f92e2
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@13619 3c298f89-4303-0410-b956-a3cf2f4a3e73
89 lines
2.9 KiB
Diff
Executable File
89 lines
2.9 KiB
Diff
Executable File
From 18a3bda7bf72a36c3e3164402cd0e4dfa2ff4687 Mon Sep 17 00:00:00 2001
|
|
From: Andy Green <agreen@localhost.localdomain>
|
|
Date: Fri, 25 Jul 2008 23:06:09 +0100
|
|
Subject: [PATCH] fix-motion-sensor-corruption.patch
|
|
|
|
---
|
|
arch/arm/mach-s3c2440/mach-gta02.c | 35 ++++++++++++++++++++++++++++++++---
|
|
1 files changed, 32 insertions(+), 3 deletions(-)
|
|
|
|
diff --git a/arch/arm/mach-s3c2440/mach-gta02.c b/arch/arm/mach-s3c2440/mach-gta02.c
|
|
index e1984a9..9e8fae7 100644
|
|
--- a/arch/arm/mach-s3c2440/mach-gta02.c
|
|
+++ b/arch/arm/mach-s3c2440/mach-gta02.c
|
|
@@ -905,31 +905,58 @@ static struct platform_device gta02_vibrator_dev = {
|
|
/* #define DEBUG_SPEW_MS */
|
|
#define MG_PER_SAMPLE 18
|
|
|
|
+struct lis302dl_platform_data lis302_pdata[];
|
|
+
|
|
void gat02_lis302dl_bitbang_read(struct lis302dl_info *lis)
|
|
{
|
|
struct lis302dl_platform_data *pdata = lis->pdata;
|
|
u8 shifter = 0xc0 | LIS302DL_REG_OUT_X; /* read, autoincrement */
|
|
int n, n1;
|
|
+ unsigned long other_cs;
|
|
unsigned long flags;
|
|
#ifdef DEBUG_SPEW_MS
|
|
s8 x, y, z;
|
|
#endif
|
|
|
|
- spin_lock_irqsave(&motion_irq_lock, flags);
|
|
+ local_save_flags(flags);
|
|
+
|
|
+ /*
|
|
+ * Huh.. "quirk"... CS on this device is not really "CS" like you can
|
|
+ * expect. Instead when 1 it selects I2C interface mode. Because we
|
|
+ * have 2 devices on one interface, the "disabled" device when we talk
|
|
+ * to an "enabled" device sees the clocks as I2C clocks, creating
|
|
+ * havoc.
|
|
+ * I2C sees MOSI going LOW while CLK HIGH as a START action, we must
|
|
+ * ensure this is never issued.
|
|
+ */
|
|
+
|
|
+ if (&lis302_pdata[0] == pdata)
|
|
+ other_cs = lis302_pdata[1].pin_chip_select;
|
|
+ else
|
|
+ other_cs = lis302_pdata[0].pin_chip_select;
|
|
+
|
|
+ s3c2410_gpio_setpin(other_cs, 1);
|
|
+ s3c2410_gpio_setpin(pdata->pin_chip_select, 1);
|
|
+ s3c2410_gpio_setpin(pdata->pin_clk, 1);
|
|
s3c2410_gpio_setpin(pdata->pin_chip_select, 0);
|
|
for (n = 0; n < 8; n++) { /* write the r/w, inc and address */
|
|
s3c2410_gpio_setpin(pdata->pin_clk, 0);
|
|
s3c2410_gpio_setpin(pdata->pin_mosi, (shifter >> 7) & 1);
|
|
+ s3c2410_gpio_setpin(pdata->pin_clk, 0);
|
|
+ s3c2410_gpio_setpin(pdata->pin_clk, 1);
|
|
s3c2410_gpio_setpin(pdata->pin_clk, 1);
|
|
shifter <<= 1;
|
|
}
|
|
+
|
|
for (n = 0; n < 5; n++) { /* 5 consequetive registers */
|
|
for (n1 = 0; n1 < 8; n1++) { /* 8 bits each */
|
|
s3c2410_gpio_setpin(pdata->pin_clk, 0);
|
|
- s3c2410_gpio_setpin(pdata->pin_clk, 1);
|
|
+ s3c2410_gpio_setpin(pdata->pin_clk, 0);
|
|
shifter <<= 1;
|
|
if (s3c2410_gpio_getpin(pdata->pin_miso))
|
|
shifter |= 1;
|
|
+ s3c2410_gpio_setpin(pdata->pin_clk, 1);
|
|
+ s3c2410_gpio_setpin(pdata->pin_clk, 1);
|
|
}
|
|
switch (n) {
|
|
case 0:
|
|
@@ -953,7 +980,9 @@ void gat02_lis302dl_bitbang_read(struct lis302dl_info *lis)
|
|
}
|
|
}
|
|
s3c2410_gpio_setpin(pdata->pin_chip_select, 1);
|
|
- spin_unlock_irqrestore(&motion_irq_lock, flags);
|
|
+ s3c2410_gpio_setpin(other_cs, 1);
|
|
+ local_irq_restore(flags);
|
|
+
|
|
input_sync(lis->input_dev);
|
|
#ifdef DEBUG_SPEW_MS
|
|
printk("%s: %d %d %d\n", pdata->name, x, y, z);
|
|
--
|
|
1.5.6.3
|
|
|