This is a note to let you know that I've just added the patch titled
iio: adc: at91_adc: allow to use full range of startup time
to the 3.14-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
iio-adc-at91_adc-allow-to-use-full-range-of-startup-time.patch
and it can be found in the queue-3.14 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 2ab5f39bc7825808e0fa1e7e5f0b23e174563467 Mon Sep 17 00:00:00 2001
From: Jan Leupold <leupold@xxxxxxxxxxxxxxxxxxxxx>
Date: Wed, 17 Jun 2015 18:21:36 +0200
Subject: iio: adc: at91_adc: allow to use full range of startup time
From: Jan Leupold <leupold@xxxxxxxxxxxxxxxxxxxxx>
commit 2ab5f39bc7825808e0fa1e7e5f0b23e174563467 upstream.
The DT-Property "atmel,adc-startup-time" is stored in an u8 for a microsecond
value. When trying to increase the value of STARTUP in Register AT91_ADC_MR
some higher values can't be reached.
Change the type in function parameter and private structure field from u8 to
u32.
Signed-off-by: Jan Leupold <leupold@xxxxxxxxxxxxxxxxxxxxx>
[nicolas.ferre@xxxxxxxxx: change commit message, increase u16 to u32 for startup time]
Signed-off-by: Nicolas Ferre <nicolas.ferre@xxxxxxxxx>
Acked-by: Alexandre Belloni <alexandre.belloni@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Jonathan Cameron <jic23@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/iio/adc/at91_adc.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
--- a/drivers/iio/adc/at91_adc.c
+++ b/drivers/iio/adc/at91_adc.c
@@ -58,7 +58,7 @@ struct at91_adc_caps {
u8 ts_pen_detect_sensitivity;
/* startup time calculate function */
- u32 (*calc_startup_ticks)(u8 startup_time, u32 adc_clk_khz);
+ u32 (*calc_startup_ticks)(u32 startup_time, u32 adc_clk_khz);
u8 num_channels;
struct at91_adc_reg_desc registers;
@@ -82,7 +82,7 @@ struct at91_adc_state {
u8 num_channels;
void __iomem *reg_base;
struct at91_adc_reg_desc *registers;
- u8 startup_time;
+ u32 startup_time;
u8 sample_hold_time;
bool sleep_mode;
struct iio_trigger **trig;
@@ -590,7 +590,7 @@ ret:
return ret;
}
-static u32 calc_startup_ticks_9260(u8 startup_time, u32 adc_clk_khz)
+static u32 calc_startup_ticks_9260(u32 startup_time, u32 adc_clk_khz)
{
/*
* Number of ticks needed to cover the startup time of the ADC
@@ -601,7 +601,7 @@ static u32 calc_startup_ticks_9260(u8 st
return round_up((startup_time * adc_clk_khz / 1000) - 1, 8) / 8;
}
-static u32 calc_startup_ticks_9x5(u8 startup_time, u32 adc_clk_khz)
+static u32 calc_startup_ticks_9x5(u32 startup_time, u32 adc_clk_khz)
{
/*
* For sama5d3x and at91sam9x5, the formula changes to:
Patches currently in stable-queue which might be from leupold@xxxxxxxxxxxxxxxxxxxxx are
queue-3.14/iio-adc-at91_adc-allow-to-use-full-range-of-startup-time.patch
--
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