mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2024-11-28 16:05:21 +02:00
a95f9f92e2
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@13619 3c298f89-4303-0410-b956-a3cf2f4a3e73
169 lines
5.1 KiB
Diff
Executable File
169 lines
5.1 KiB
Diff
Executable File
From d0c3a8bdfe2722f00b5ec7812500fbf1f6229b9f Mon Sep 17 00:00:00 2001
|
|
From: Andy Green <andy@openmoko.com>
|
|
Date: Fri, 25 Jul 2008 23:06:16 +0100
|
|
Subject: [PATCH] fix-lis302dl-resume-and-init-reload-boot-coefficients.patch
|
|
Reported-by: John Lee <john_lee@openmoko.com>
|
|
|
|
We don't reset the devices either at init or resume, where init
|
|
means use the BOOT bit to reload device calibration coefficients
|
|
from internal EEPROM. John Lee saw brain-damaged behaviour after
|
|
resume and sometimes after boot (since it may not have lost power
|
|
to force a BOOT itself that makes sense).
|
|
|
|
This patch
|
|
|
|
- adds a diagnostic dump feature down /sys
|
|
- forces BOOT action on init and resume, and waits for
|
|
completion
|
|
- makes sure XYZ capture is enabled on resume
|
|
- adds some constants in the .h and removes some magic numbers
|
|
in the code by using them
|
|
|
|
Signed-off-by: Andy Green <andy@openmoko.com>
|
|
---
|
|
drivers/input/misc/lis302dl.c | 78 +++++++++++++++++++++++++++++++++++++++--
|
|
include/linux/lis302dl.h | 9 +++++
|
|
2 files changed, 84 insertions(+), 3 deletions(-)
|
|
|
|
diff --git a/drivers/input/misc/lis302dl.c b/drivers/input/misc/lis302dl.c
|
|
index 1d19418..553a731 100644
|
|
--- a/drivers/input/misc/lis302dl.c
|
|
+++ b/drivers/input/misc/lis302dl.c
|
|
@@ -221,9 +221,37 @@ static ssize_t set_scale(struct device *dev, struct device_attribute *attr,
|
|
|
|
static DEVICE_ATTR(full_scale, S_IRUGO | S_IWUSR, show_scale, set_scale);
|
|
|
|
+static ssize_t lis302dl_dump(struct device *dev, struct device_attribute *attr,
|
|
+ char *buf)
|
|
+{
|
|
+ struct lis302dl_info *lis = dev_get_drvdata(dev);
|
|
+ int n = 0;
|
|
+ u8 reg[0x40];
|
|
+ char *end = buf;
|
|
+ unsigned long flags;
|
|
+
|
|
+ local_save_flags(flags);
|
|
+
|
|
+ for (n = 0; n < sizeof(reg); n++)
|
|
+ reg[n] = reg_read(lis, n);
|
|
+
|
|
+ local_irq_restore(flags);
|
|
+
|
|
+ for (n = 0; n < sizeof(reg); n += 16) {
|
|
+ hex_dump_to_buffer(reg + n, 16, 16, 1, end, 128, 0);
|
|
+ end += strlen(end);
|
|
+ *end++ = '\n';
|
|
+ *end++ = '\0';
|
|
+ }
|
|
+
|
|
+ return end - buf;
|
|
+}
|
|
+static DEVICE_ATTR(dump, S_IRUGO, lis302dl_dump, NULL);
|
|
+
|
|
static struct attribute *lis302dl_sysfs_entries[] = {
|
|
&dev_attr_sample_rate.attr,
|
|
&dev_attr_full_scale.attr,
|
|
+ &dev_attr_dump.attr,
|
|
NULL
|
|
};
|
|
|
|
@@ -276,6 +304,24 @@ static void lis302dl_input_close(struct input_dev *inp)
|
|
local_irq_restore(flags);
|
|
}
|
|
|
|
+/* get the device to reload its coefficients from EEPROM and wait for it
|
|
+ * to complete
|
|
+ */
|
|
+
|
|
+static int __lis302dl_reset_device(struct lis302dl_info *lis)
|
|
+{
|
|
+ int timeout = 10;
|
|
+
|
|
+ reg_write(lis, LIS302DL_REG_CTRL2, LIS302DL_CTRL2_BOOT |
|
|
+ LIS302DL_CTRL2_FDS);
|
|
+
|
|
+ while ((reg_read(lis, LIS302DL_REG_CTRL2) & LIS302DL_CTRL2_BOOT) &&
|
|
+ (timeout--))
|
|
+ mdelay(1);
|
|
+
|
|
+ return !!(timeout < 0);
|
|
+}
|
|
+
|
|
static int __devinit lis302dl_probe(struct spi_device *spi)
|
|
{
|
|
int rc;
|
|
@@ -347,12 +393,24 @@ static int __devinit lis302dl_probe(struct spi_device *spi)
|
|
goto bail_inp_dev;
|
|
}
|
|
|
|
- reg_write(lis, LIS302DL_REG_CTRL1, 0x47);
|
|
- reg_write(lis, LIS302DL_REG_CTRL3, 0xc0);
|
|
+ if (__lis302dl_reset_device(lis))
|
|
+ dev_err(&spi->dev, "device BOOT reload failed\n");
|
|
+
|
|
+ /* force us powered */
|
|
+ reg_write(lis, LIS302DL_REG_CTRL1, LIS302DL_CTRL1_PD |
|
|
+ LIS302DL_CTRL1_Xen |
|
|
+ LIS302DL_CTRL1_Yen |
|
|
+ LIS302DL_CTRL1_Zen);
|
|
+ mdelay(1);
|
|
+
|
|
+ reg_write(lis, LIS302DL_REG_CTRL2, 0);
|
|
+ reg_write(lis, LIS302DL_REG_CTRL3, LIS302DL_CTRL3_PP_OD |
|
|
+ LIS302DL_CTRL3_IHL);
|
|
reg_write(lis, LIS302DL_REG_FF_WU_THS_1, 0x14);
|
|
reg_write(lis, LIS302DL_REG_FF_WU_DURATION_1, 0x00);
|
|
reg_write(lis, LIS302DL_REG_FF_WU_CFG_1, 0x95);
|
|
|
|
+ /* start off in powered down mode; we power up when someone opens us */
|
|
reg_write(lis, LIS302DL_REG_CTRL1, LIS302DL_CTRL1_Xen |
|
|
LIS302DL_CTRL1_Yen |
|
|
LIS302DL_CTRL1_Zen);
|
|
@@ -494,8 +552,22 @@ static int lis302dl_resume(struct spi_device *spi)
|
|
/* get our IO to the device back in operational states */
|
|
(lis->pdata->lis302dl_suspend_io)(lis, 1);
|
|
|
|
+ /* resume from powerdown first! */
|
|
+ reg_write(lis, LIS302DL_REG_CTRL1, LIS302DL_CTRL1_PD |
|
|
+ LIS302DL_CTRL1_Xen |
|
|
+ LIS302DL_CTRL1_Yen |
|
|
+ LIS302DL_CTRL1_Zen);
|
|
+ mdelay(1);
|
|
+
|
|
+ if (__lis302dl_reset_device(lis))
|
|
+ dev_err(&spi->dev, "device BOOT reload failed\n");
|
|
+
|
|
/* restore registers after resume */
|
|
- reg_write(lis, LIS302DL_REG_CTRL1, lis->regs[LIS302DL_REG_CTRL1]);
|
|
+ reg_write(lis, LIS302DL_REG_CTRL1, lis->regs[LIS302DL_REG_CTRL1] |
|
|
+ LIS302DL_CTRL1_PD |
|
|
+ LIS302DL_CTRL1_Xen |
|
|
+ LIS302DL_CTRL1_Yen |
|
|
+ LIS302DL_CTRL1_Zen);
|
|
reg_write(lis, LIS302DL_REG_CTRL2, lis->regs[LIS302DL_REG_CTRL2]);
|
|
reg_write(lis, LIS302DL_REG_CTRL3, lis->regs[LIS302DL_REG_CTRL3]);
|
|
reg_write(lis, LIS302DL_REG_FF_WU_CFG_1,
|
|
diff --git a/include/linux/lis302dl.h b/include/linux/lis302dl.h
|
|
index 0d6b4c4..4d8ded9 100644
|
|
--- a/include/linux/lis302dl.h
|
|
+++ b/include/linux/lis302dl.h
|
|
@@ -66,6 +66,15 @@ enum lis302dl_reg_ctrl1 {
|
|
LIS302DL_CTRL1_DR = 0x80,
|
|
};
|
|
|
|
+enum lis302dl_reg_ctrl2 {
|
|
+ LIS302DL_CTRL2_HPC1 = 0x01,
|
|
+ LIS302DL_CTRL2_HPC2 = 0x02,
|
|
+ LIS302DL_CTRL2_HPFF1 = 0x04,
|
|
+ LIS302DL_CTRL2_HPFF2 = 0x08,
|
|
+ LIS302DL_CTRL2_FDS = 0x10,
|
|
+ LIS302DL_CTRL2_BOOT = 0x40,
|
|
+ LIS302DL_CTRL2_SIM = 0x80,
|
|
+};
|
|
enum lis302dl_reg_ctrl3 {
|
|
LIS302DL_CTRL3_PP_OD = 0x40,
|
|
LIS302DL_CTRL3_IHL = 0x80,
|
|
--
|
|
1.5.6.3
|
|
|