diff options
Diffstat (limited to 'lis3-improve-handling-of-null-rate.patch')
| -rw-r--r-- | lis3-improve-handling-of-null-rate.patch | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/lis3-improve-handling-of-null-rate.patch b/lis3-improve-handling-of-null-rate.patch new file mode 100644 index 000000000..98512564a --- /dev/null +++ b/lis3-improve-handling-of-null-rate.patch @@ -0,0 +1,79 @@ +>From 56fb161a9ca0129f8e266e4dbe79346552ff8089 Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?=C3=89ric=20Piel?= <eric.piel@tremplin-utc.net> +Date: Thu, 3 Nov 2011 16:22:40 +0100 +Subject: [PATCH] lis3: Improve handling of null rate +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +When obtaining a rate of 0, we would disable the device supposely +because it seems to behave incorectly. It actually only comes from the +fact that the device is off and on lis3dc it's reflected in the rate. +So handle this nicely by just waiting a safe time, and then using the +device as normally. + +Signed-off-by: ??ric Piel <eric.piel@tremplin-utc.net> +--- + drivers/misc/lis3lv02d/lis3lv02d.c | 16 ++++++++-------- + 1 files changed, 8 insertions(+), 8 deletions(-) + +diff --git a/drivers/misc/lis3lv02d/lis3lv02d.c b/drivers/misc/lis3lv02d/lis3lv02d.c +index 35c67e0..42dce2a 100644 +--- a/drivers/misc/lis3lv02d/lis3lv02d.c ++++ b/drivers/misc/lis3lv02d/lis3lv02d.c +@@ -188,7 +188,8 @@ static void lis3lv02d_get_xyz(struct lis3lv02d *lis3, int *x, int *y, int *z) + /* conversion btw sampling rate and the register values */ + static int lis3_12_rates[4] = {40, 160, 640, 2560}; + static int lis3_8_rates[2] = {100, 400}; +-static int lis3_3dc_rates[16] = {0, 1, 10, 25, 50, 100, 200, 400, 1600, 5000}; ++/* LIS3DC: 0 = power off, above 9 = undefined */ ++static int lis3_3dc_rates[16] = {0, 1, 10, 25, 50, 100, 200, 400, 1600, 5000, -1, -1, -1, -1, -1, -1}; + + /* ODR is Output Data Rate */ + static int lis3lv02d_get_odr(struct lis3lv02d *lis3) +@@ -202,12 +203,11 @@ static int lis3lv02d_get_odr(struct lis3lv02d *lis3) + return lis3->odrs[(ctrl >> shift)]; + } + +-static int lis3lv02d_get_pwron_wait(struct lis3lv02d *lis3) ++static int lis3lv02d_wait_pwron(struct lis3lv02d *lis3) + { + int div = lis3lv02d_get_odr(lis3); +- +- if (WARN_ONCE(div == 0, "device returned spurious data")) +- return -ENXIO; ++ if (div <= 0) ++ div = 1; /* maximum delay */ + + /* LIS3 power on delay is quite long */ + msleep(lis3->pwron_delay / div); +@@ -274,7 +274,7 @@ static int lis3lv02d_selftest(struct lis3lv02d *lis3, s16 results[3]) + + lis3->read(lis3, ctlreg, ®); + lis3->write(lis3, ctlreg, (reg | selftest)); +- ret = lis3lv02d_get_pwron_wait(lis3); ++ ret = lis3lv02d_wait_pwron(lis3); + if (ret) + goto fail; + +@@ -285,7 +285,7 @@ static int lis3lv02d_selftest(struct lis3lv02d *lis3, s16 results[3]) + + /* back to normal settings */ + lis3->write(lis3, ctlreg, reg); +- ret = lis3lv02d_get_pwron_wait(lis3); ++ ret = lis3lv02d_wait_pwron(lis3); + if (ret) + goto fail; + +@@ -397,7 +397,7 @@ int lis3lv02d_poweron(struct lis3lv02d *lis3) + lis3->write(lis3, CTRL_REG2, reg); + } + +- err = lis3lv02d_get_pwron_wait(lis3); ++ err = lis3lv02d_wait_pwron(lis3); + if (err) + return err; + +-- +1.7.7.1 + |