Re: [PATCH 05/15] ARM: at91: sam9m10g45ek: Add touchscreen support through at91_adc
From: Jonathan Cameron <jic23@kernel.org>
Date: 2014-03-16 18:17:44
Also in:
linux-arm-kernel, linux-iio, lkml
On 05/03/14 17:35, Alexandre Belloni wrote:
at91_adc now supports reading a touchscreen for ADCs without a TSMR register. Enable touchscreen support through at91_adc. This allows to use both a touchscreen and the remaining ADC channel at the same time. Also, lower the clock for the ADC as it allows to have more stable reads and this is the speed used by atmel_tsadcc.
Are there any side effects on the adc read if that functionality was previously being used? I doubt it matters, but probably wants to be mentioned here if there is.
quoted hunk ↗ jump to hunk
Signed-off-by: Alexandre Belloni <redacted> --- arch/arm/mach-at91/at91sam9g45.c | 2 +- arch/arm/mach-at91/board-sam9m10g45ek.c | 1 + 2 files changed, 2 insertions(+), 1 deletion(-)diff --git a/arch/arm/mach-at91/at91sam9g45.c b/arch/arm/mach-at91/at91sam9g45.c index 2f455ce35268..3c519a7a938f 100644 --- a/arch/arm/mach-at91/at91sam9g45.c +++ b/arch/arm/mach-at91/at91sam9g45.c@@ -181,7 +181,7 @@ static struct clk vdec_clk = { static struct clk adc_op_clk = { .name = "adc_op_clk", .type = CLK_TYPE_PERIPHERAL, - .rate_hz = 13200000, + .rate_hz = 300000, }; /* AES/TDES/SHA clock - Only for sam9m11/sam9g56 */diff --git a/arch/arm/mach-at91/board-sam9m10g45ek.c b/arch/arm/mach-at91/board-sam9m10g45ek.c index ef39078c8ce2..4d775b796ce4 100644 --- a/arch/arm/mach-at91/board-sam9m10g45ek.c +++ b/arch/arm/mach-at91/board-sam9m10g45ek.c@@ -315,6 +315,7 @@ static struct at91_adc_data ek_adc_data = { .channels_used = BIT(0) | BIT(1) | BIT(2) | BIT(3) | BIT(4) | BIT(5) | BIT(6) | BIT(7), .use_external_triggers = true, .vref = 3300, + .touchscreen_type = ATMEL_ADC_TOUCHSCREEN_4WIRE, }; /*