From: petr.cvek@tul•cz (Petr Cvek)
To: linux-arm-kernel@lists•infradead.org
Subject: [PATCH v4 18/26] ARM: pxa: magician: Add support for ADS7846
Date: Mon, 12 Oct 2015 06:39:54 +0200 [thread overview]
Message-ID: <561B399A.3040508@tul.cz> (raw)
In-Reply-To: <1443876564.4186.34.camel@gmail.com>
Dne 3.10.2015 v 14:49 Philipp Zabel napsal(a):
> Am Montag, den 28.09.2015, 23:38 +0200 schrieb Petr Cvek:
>> Add support for an ADS7846 touchscreen.
>
> It's actually a TSC2045.
2046..., but I will mention it in next commit message (it was name of the driver).
>
>> Signed-off-by: Petr Cvek <petr.cvek@tul•cz>
>> ---
>> arch/arm/mach-pxa/magician.c | 86
>> ++++++++++++++++++++++++++++++++++++++++++++
>> 1 file changed, 86 insertions(+)
>>
>> diff --git a/arch/arm/mach-pxa/magician.c b/arch/arm/mach
>> -pxa/magician.c
>> index af8133a..450f35f 100644
>> --- a/arch/arm/mach-pxa/magician.c
>> +++ b/arch/arm/mach-pxa/magician.c
>> @@ -28,6 +28,7 @@
>> #include <linux/pwm_backlight.h>
>> #include <linux/regulator/driver.h>
>> #include <linux/regulator/gpio-regulator.h>
>> +#include <linux/regulator/fixed.h>
>> #include <linux/regulator/machine.h>
>> #include <linux/usb/gpio_vbus.h>
>> #include <linux/i2c/pxa-i2c.h>
>> @@ -44,6 +45,10 @@
>> #include <linux/platform_data/irda-pxaficp.h>
>> #include <linux/platform_data/usb-ohci-pxa27x.h>
>>
>> +#include <linux/spi/spi.h>
>> +#include <linux/spi/pxa2xx_spi.h>
>> +#include <linux/spi/ads7846.h>
>> +
>> #include "devices.h"
>> #include "generic.h"
>>
>> @@ -748,6 +753,37 @@ static struct platform_device bq24022 = {
>> };
>>
>> /*
>> + * fixed regulator for ads7846
>> + */
>> +
>> +static struct regulator_consumer_supply ads7846_supply =
>> + REGULATOR_SUPPLY("vcc", "spi2.0");
>> +
>> +static struct regulator_init_data vads7846_regulator = {
>> + .constraints = {
>> + .valid_ops_mask = REGULATOR_CHANGE_STATUS,
>> + },
>> + .num_consumer_supplies = 1,
>> + .consumer_supplies = &ads7846_supply,
>> +};
>> +
>> +static struct fixed_voltage_config vads7846 = {
>> + .supply_name = "vads7846",
>> + .microvolts = 3300000, /* probably */
>
> I agree.
>
>> + .gpio = -EINVAL,
>> + .startup_delay = 0,
>> + .init_data = &vads7846_regulator,
>> +};
>> +
>> +static struct platform_device vads7846_device = {
>> + .name = "reg-fixed-voltage",
>> + .id = 1,
>> + .dev = {
>> + .platform_data = &vads7846,
>> + },
>> +};
>> +
>> +/*
>> * MMC/SD
>> */
>>
>> @@ -879,6 +915,51 @@ static struct i2c_pxa_platform_data
>> magician_i2c_power_info = {
>> };
>>
>> /*
>> + * Touchscreen
>> + */
>> +
>> +static struct ads7846_platform_data ads7846_pdata = {
>> + .model = 7846,
>> + .x_min = 0,
>> + .y_min = 0,
>> + .x_max = 4096,
>> + .y_max = 4096,
>> + .x_plate_ohms = 180, /* for pressure
>> in 0-255 */
>> + .y_plate_ohms = 180,
>> + .pressure_max = 255, /* up to 12bit
>> sampling */
>> + .debounce_max = 10,
>> + .debounce_tol = 3,
>> + .debounce_rep = 1,
>> + .gpio_pendown = GPIO115_MAGICIAN_nPEN_IRQ,
>> + .keep_vref_on = 1, /* FIXME, external
>> Vref? */
>> + .vref_delay_usecs = 100,
>> + /* .wait_for_sync, GPIO77_LCD_BIAS low noise measure,
>> latency! */
>> +};
>> +
>> +struct pxa2xx_spi_chip tsc2046_chip_info = {
>> + .tx_threshold = 1,
>> + .rx_threshold = 2,
>> + .timeout = 64,
>> + .gpio_cs = -1,
>> +};
>> +
>> +static struct pxa2xx_spi_master magician_spi_info = {
>> + .num_chipselect = 1,
>> + .enable_dma = 1,
>> +};
>> +
>> +static struct spi_board_info ads7846_spi_board_info[] __initdata = {
>> + {
>> + .modalias = "ads7846",
>> + .bus_num = 2,
>> + .max_speed_hz = 1857143,
>
> I had used 2.6 MHz here.
Will change to something more visible, probably remnants of some debugging.
BTW It sets frequency of a SPI?
>
>> + .platform_data = &ads7846_pdata,
>> + .controller_data = &tsc2046_chip_info,
>> + .irq = PXA_GPIO_TO_IRQ(GPIO115_MAGICIAN_nPEN_IRQ),
>> + },
>> +};
>> +
>> +/*
>> * Platform devices
>> */
>>
>> @@ -887,6 +968,7 @@ static struct platform_device *devices[]
>> __initdata = {
>> &egpio,
>> &backlight,
>> &pasic3,
>> + &vads7846_device,
>> &bq24022,
>> &gpio_vbus,
>> &power_supply,
>> @@ -944,6 +1026,10 @@ static void __init magician_init(void)
>> lcd_select ? &samsung_info : &toppoly_info);
>> } else
>> pr_err("LCD detection: CPLD mapping failed\n");
>> +
>> + pxa2xx_set_spi_info(2, &magician_spi_info);
>> + spi_register_board_info(ARRAY_AND_SIZE(ads7846_spi_board_inf
>> o));
>> +
>> }
>>
>> MACHINE_START(MAGICIAN, "HTC Magician")
>
> regards
> Philipp
>
Petr
next prev parent reply other threads:[~2015-10-12 4:39 UTC|newest]
Thread overview: 59+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <cover.1443472089.git.petr.cvek@tul.cz>
2015-09-28 21:09 ` [PATCH v4 01/26] ARM: pxa: magician: Fix indentation in machine files Petr Cvek
2015-10-03 12:14 ` Philipp Zabel
2015-09-28 21:10 ` [PATCH v4 02/26] ARM: pxa: magician: Change comments to be more informative Petr Cvek
2015-10-03 12:19 ` Philipp Zabel
2015-10-13 20:08 ` Robert Jarzmik
2015-09-28 21:10 ` [PATCH v4 03/26] ARM: pxa: magician: Print more specific error message for global GPIOs Petr Cvek
2015-10-03 12:19 ` Philipp Zabel
2015-09-28 21:11 ` [PATCH v4 04/26] ARM: pxa: magician: Optimize debug messages for LCD power Petr Cvek
2015-10-03 12:20 ` Philipp Zabel
2015-09-28 21:11 ` [PATCH v4 05/26] ARM: pxa: magician: Change description of LCD power GPIO Petr Cvek
2015-10-03 12:21 ` Philipp Zabel
2015-09-28 21:15 ` [PATCH v4 06/26] ARM: pxa: magician: Add new discovered EGPIO pins Petr Cvek
2015-10-03 12:23 ` Philipp Zabel
2015-09-28 21:15 ` [PATCH v4 07/26] ARM: pxa: magician: Fix HTC Magician pin mux definitions Petr Cvek
2015-10-03 12:30 ` Philipp Zabel
2015-10-05 2:15 ` Petr Cvek
2015-10-13 20:09 ` Robert Jarzmik
2015-09-28 21:15 ` [PATCH v4 08/26] ARM: pxa: magician: Rename abstract LCD GPIOs Petr Cvek
2015-10-03 12:31 ` Philipp Zabel
2015-09-28 21:16 ` [PATCH v4 09/26] ARM: pxa: magician: Optimize powerup delays for Samsung LCD Petr Cvek
2015-10-03 12:32 ` Philipp Zabel
2015-09-28 21:32 ` [PATCH v4 10/26] ARM: pxa: magician: Optimize Samsung LCD refresh to 50Hz Petr Cvek
2015-10-03 12:33 ` Philipp Zabel
2015-09-28 21:32 ` [PATCH v4 11/26] ARM: pxa: magician: Optimize EGPIO initial values Petr Cvek
2015-10-03 12:35 ` Philipp Zabel
2015-10-07 19:45 ` Robert Jarzmik
2015-09-28 21:32 ` [PATCH v4 12/26] ARM: pxa: magician: Rename charger cable detection EGPIOs Petr Cvek
2015-10-03 12:38 ` Philipp Zabel
2015-10-09 2:33 ` Petr Cvek
2015-09-28 21:33 ` [PATCH v4 13/26] ARM: pxa: magician: Fix and add charging detection functions Petr Cvek
2015-09-28 21:33 ` [PATCH v4 14/26] ARM: pxa: magician: Fix platform data for both PXA27x I2C controllers Petr Cvek
2015-10-03 12:41 ` Philipp Zabel
2015-09-28 21:34 ` [PATCH v4 15/26] ARM: pxa: magician: Fix redundant GPIO request for pxaficp_ir Petr Cvek
2015-09-28 21:34 ` [PATCH v4 16/26] ARM: pxa: magician: Fix support for Intel Strata NOR Flash Petr Cvek
2015-09-28 21:38 ` [PATCH v4 17/26] ARM: pxa: magician: Fix wrongly enabled USB host ports Petr Cvek
2015-10-03 12:45 ` Philipp Zabel
2015-10-05 2:03 ` Petr Cvek
2015-09-28 21:38 ` [PATCH v4 18/26] ARM: pxa: magician: Add support for ADS7846 Petr Cvek
2015-10-03 12:49 ` Philipp Zabel
2015-10-12 4:39 ` Petr Cvek [this message]
2015-09-28 21:38 ` [PATCH v4 19/26] ARM: pxa: magician: Add support for Omnivision OV9640 camera Petr Cvek
2015-10-03 12:50 ` Philipp Zabel
2015-10-07 19:49 ` Robert Jarzmik
2015-10-08 6:05 ` Petr Cvek
2015-09-28 21:39 ` [PATCH v4 20/26] ARM: pxa: magician: Add support for MAX1587A Vcore regulator Petr Cvek
2015-10-03 12:57 ` Philipp Zabel
2015-10-13 20:16 ` Robert Jarzmik
2015-09-28 21:39 ` [PATCH v4 21/26] ARM: pxa: magician: Add support for PXA27x UDC Petr Cvek
2015-10-03 12:58 ` Philipp Zabel
2015-10-13 20:29 ` Robert Jarzmik
2015-09-28 21:39 ` [PATCH v4 22/26] ARM: pxa: magician: Remove pdata for pasic3-leds Petr Cvek
2015-10-03 12:59 ` Philipp Zabel
2015-10-13 20:32 ` Robert Jarzmik
2015-09-28 21:40 ` [PATCH v4 23/26] ARM: pxa: magician: Remove definition of the STUART port Petr Cvek
2015-09-28 21:40 ` [PATCH v4 24/26] ARM: pxa: magician: Add debug message for backlight brightness function Petr Cvek
2015-09-28 21:40 ` [PATCH v4 25/26] ARM: pxa: magician: Add missing regulator for PWM backlight Petr Cvek
2015-10-03 13:02 ` Philipp Zabel
2015-09-28 21:42 ` [PATCH v4 26/26] ARM: pxa: magician: Move platform_add_devices() to the end of magician_init() Petr Cvek
2015-10-03 13:04 ` Philipp Zabel
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=561B399A.3040508@tul.cz \
--to=petr.cvek@tul$(echo .)cz \
--cc=linux-arm-kernel@lists$(echo .)infradead.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox