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patch "iio: adc: at91_adc: allow to use full range of startup time" added to staging-linus

PATCH [email protected] 1 participant 1 message Jul 23, 2015

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Stable branch IIO Arm/Microchip (AT91) SoC support
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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 my staging git tree which can be found at
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging.git
in the staging-linus branch.

The patch will show up in the next release of the linux-next tree (usually sometime within the next 24 hours during the week.)

The patch will hopefully also be merged in Linus's tree for the next -rc kernel release.

If you have any questions about this process, please let me know.

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From 815983e9afcb21552e1b9d77e3755d394cbf5249 Mon Sep 17 00:00:00 2001

From: Jan Leupold <[email protected]>
Date: Wed, 17 Jun 2015 18:21:36 +0200
Subject: iio: adc: at91_adc: allow to use full range of startup time

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 <[email protected]>
[[email protected]: change commit message, increase u16 to u32 for startup time]
Signed-off-by Nicolas Ferre <[email protected]>
Acked-by Alexandre Belloni <[email protected]>
Cc <[email protected]>
Signed-off-by Jonathan Cameron <[email protected]>
---
 drivers/iio/adc/at91_adc.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)
drivers/iio/adc/at91_adc.c +4 -4
index 8a0eb4a04fb5..7b40925dd4ff 100644
@@ -182,7 +182,7 @@ 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;

@@ -201,7 +201,7 @@ 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;

@@ -779,7 +779,7 @@ 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

@@ -790,7 +790,7 @@ static u32 calc_startup_ticks_9260(u8 startup_time, u32 adc_clk_khz)
 	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:
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