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fc54b9bf15
(stable-branch of Openmoko) git-svn-id: svn://svn.openwrt.org/openwrt/trunk@13613 3c298f89-4303-0410-b956-a3cf2f4a3e73
132 lines
4.1 KiB
Diff
132 lines
4.1 KiB
Diff
From 5e2b5ddaf95985744e0e0c28ba6dac83c093fd15 Mon Sep 17 00:00:00 2001
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From: Simon Kagstrom <simon.kagstrom@gmail.com>
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Date: Thu, 16 Oct 2008 01:19:29 +0100
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Subject: [PATCH] : lis302dl-threshold-configuration-in-mg.patch
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Change the threshold configuration to be set in mg instead
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From: Simon Kagstrom <simon.kagstrom@gmail.com>
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This patch changes the threshold sysfs file to handle values in mg
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instead of the device-values. Overrun values have also been corrected
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and the sampler function now honors the FS bit.
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Signed-off-by: Simon Kagstrom <simon.kagstrom@gmail.com>
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---
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drivers/input/misc/lis302dl.c | 49 ++++++++++++++++++++++++++++++++--------
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1 files changed, 39 insertions(+), 10 deletions(-)
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diff --git a/drivers/input/misc/lis302dl.c b/drivers/input/misc/lis302dl.c
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index 300918d..c1b1d67 100644
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--- a/drivers/input/misc/lis302dl.c
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+++ b/drivers/input/misc/lis302dl.c
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@@ -97,6 +97,24 @@ static int __duration_to_ms(struct lis302dl_info *lis, int duration)
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return duration * 10;
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}
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+static u8 __mg_to_threshold(struct lis302dl_info *lis, int mg)
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+{
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+ /* If FS is set each bit is 71mg, otherwise 18mg. The THS register
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+ * has 7 bits for the threshold value */
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+ if (lis->flags & LIS302DL_F_FS)
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+ return min(mg / 71, 127);
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+
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+ return min(mg / 18, 127);
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+}
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+
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+static int __threshold_to_mg(struct lis302dl_info *lis, u8 threshold)
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+{
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+ if (lis->flags & LIS302DL_F_FS)
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+ return threshold * 71;
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+
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+ return threshold * 18;
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+}
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+
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/* interrupt handling related */
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enum lis302dl_intmode {
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@@ -146,23 +164,24 @@ static void _report_btn_double(struct input_dev *inp, int btn)
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}
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#endif
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-#define MG_PER_SAMPLE 18
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static void lis302dl_bitbang_read_sample(struct lis302dl_info *lis)
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{
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u8 data = 0xc0 | LIS302DL_REG_OUT_X; /* read, autoincrement */
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u8 read[5];
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unsigned long flags;
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+ int mg_per_sample;
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local_irq_save(flags);
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+ mg_per_sample = __threshold_to_mg(lis, 1);
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(lis->pdata->lis302dl_bitbang)(lis, &data, 1, &read[0], 5);
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local_irq_restore(flags);
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- input_report_rel(lis->input_dev, REL_X, MG_PER_SAMPLE * (s8)read[0]);
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- input_report_rel(lis->input_dev, REL_Y, MG_PER_SAMPLE * (s8)read[2]);
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- input_report_rel(lis->input_dev, REL_Z, MG_PER_SAMPLE * (s8)read[4]);
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+ input_report_rel(lis->input_dev, REL_X, mg_per_sample * (s8)read[0]);
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+ input_report_rel(lis->input_dev, REL_Y, mg_per_sample * (s8)read[2]);
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+ input_report_rel(lis->input_dev, REL_Z, mg_per_sample * (s8)read[4]);
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input_sync(lis->input_dev);
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@@ -234,15 +253,24 @@ static ssize_t set_scale(struct device *dev, struct device_attribute *attr,
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{
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struct lis302dl_info *lis = dev_get_drvdata(dev);
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unsigned long flags;
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+ int threshold_mg = __threshold_to_mg(lis, lis->threshold);
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local_irq_save(flags);
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- if (!strcmp(buf, "9.2\n"))
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+ if (!strcmp(buf, "9.2\n")) {
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__reg_set_bit_mask(lis, LIS302DL_REG_CTRL1, LIS302DL_CTRL1_FS,
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LIS302DL_CTRL1_FS);
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- else
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+ lis->flags |= LIS302DL_F_FS;
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+ } else {
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__reg_set_bit_mask(lis, LIS302DL_REG_CTRL1, LIS302DL_CTRL1_FS,
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- 0);
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+ 0);
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+ lis->flags &= ~LIS302DL_F_FS;
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+ }
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+
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+ /* Adjust the threshold */
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+ lis->threshold = __mg_to_threshold(lis, threshold_mg);
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+ if (lis->flags & LIS302DL_F_INPUT_OPEN)
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+ __reg_write(lis, LIS302DL_REG_FF_WU_THS_1, lis->threshold);
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local_irq_restore(flags);
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@@ -256,7 +284,7 @@ static ssize_t show_threshold(struct device *dev, struct device_attribute *attr,
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{
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struct lis302dl_info *lis = dev_get_drvdata(dev);
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- return sprintf(buf, "%d\n", lis->threshold);
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+ return sprintf(buf, "%d\n", __threshold_to_mg(lis, lis->threshold));
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}
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static ssize_t set_threshold(struct device *dev, struct device_attribute *attr,
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@@ -267,11 +295,12 @@ static ssize_t set_threshold(struct device *dev, struct device_attribute *attr,
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if (sscanf(buf, "%d\n", &val) != 1)
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return -EINVAL;
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- if (val < 0 || val > 255)
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+ /* 8g is the maximum if FS is 1 */
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+ if (val < 0 || val > 8000)
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return -ERANGE;
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/* Set the threshold and write it out if the device is used */
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- lis->threshold = val;
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+ lis->threshold = __mg_to_threshold(lis, val);
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if (lis->flags & LIS302DL_F_INPUT_OPEN)
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__reg_write(lis, LIS302DL_REG_FF_WU_THS_1, lis->threshold);
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--
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1.5.6.5
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