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Commit 00688272 authored by Andy Shevchenko's avatar Andy Shevchenko Committed by Ingo Molnar
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x86/platform/intel-mid: Enable GPIO expanders on Edison 



Intel Edison board provides GPIO expanders connected to I2C bus. Add necessary
file to get those enumerated.

Signed-off-by: default avatarAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Dan O'Donovan <dan@emutex.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1465984133-41639-1-git-send-email-andriy.shevchenko@linux.intel.com


Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
parent 5823d089

arch/x86/platform/intel-mid/device_libs/Makefile

+4 −2
Original line number Diff line number Diff line
@@ -11,11 +11,13 @@ obj-$(subst m,y,$(CONFIG_INTEL_MFLD_THERMAL)) += platform_msic_thermal.o 
# I2C Devices

obj-$(subst m,y,$(CONFIG_SENSORS_EMC1403)) += platform_emc1403.o

obj-$(subst m,y,$(CONFIG_SENSORS_LIS3LV02D)) += platform_lis331.o

obj-$(subst m,y,$(CONFIG_GPIO_PCA953X)) += platform_max7315.o

obj-$(subst m,y,$(CONFIG_INPUT_MPU3050)) += platform_mpu3050.o

obj-$(subst m,y,$(CONFIG_INPUT_BMA150)) += platform_bma023.o

obj-$(subst m,y,$(CONFIG_GPIO_PCA953X)) += platform_tca6416.o

obj-$(subst m,y,$(CONFIG_DRM_MEDFIELD)) += platform_tc35876x.o

# I2C GPIO Expanders

obj-$(subst m,y,$(CONFIG_GPIO_PCA953X)) += platform_max7315.o

obj-$(subst m,y,$(CONFIG_GPIO_PCA953X)) += platform_pcal9555a.o

obj-$(subst m,y,$(CONFIG_GPIO_PCA953X)) += platform_tca6416.o

# MISC Devices

obj-$(subst m,y,$(CONFIG_KEYBOARD_GPIO)) += platform_gpio_keys.o

obj-$(subst m,y,$(CONFIG_INTEL_MID_WATCHDOG)) += platform_wdt.o

arch/x86/platform/intel-mid/device_libs/platform_pcal9555a.c

0 → 100644
+99 −0
Original line number Diff line number Diff line 
/*

 * PCAL9555a platform data initilization file

 *

 * Copyright (C) 2016, Intel Corporation

 *

 * Authors: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

 *	    Dan O'Donovan <dan@emutex.com>

 *

 * This program is free software; you can redistribute it and/or

 * modify it under the terms of the GNU General Public License

 * as published by the Free Software Foundation; version 2

 * of the License.

 */



#include <linux/gpio.h>

#include <linux/init.h>

#include <linux/i2c.h>

#include <linux/platform_data/pca953x.h>

#include <linux/sfi.h>



#include <asm/intel-mid.h>



#define PCAL9555A_NUM	4



static struct pca953x_platform_data pcal9555a_pdata[PCAL9555A_NUM];

static int nr;



static void __init *pcal9555a_platform_data(void *info)

{

	struct i2c_board_info *i2c_info = info;

	char *type = i2c_info->type;

	struct pca953x_platform_data *pcal9555a;

	char base_pin_name[SFI_NAME_LEN + 1];

	char intr_pin_name[SFI_NAME_LEN + 1];

	int gpio_base, intr;



	snprintf(base_pin_name, sizeof(base_pin_name), "%s_base", type);

	snprintf(intr_pin_name, sizeof(intr_pin_name), "%s_int", type);



	gpio_base = get_gpio_by_name(base_pin_name);

	intr = get_gpio_by_name(intr_pin_name);



	/* Check if the SFI record valid */

	if (gpio_base == -1)

		return NULL;



	if (nr >= PCAL9555A_NUM) {

		pr_err("%s: Too many instances, only %d supported\n", __func__,

		       PCAL9555A_NUM);

		return NULL;

	}



	pcal9555a = &pcal9555a_pdata[nr++];

	pcal9555a->gpio_base = gpio_base;



	if (intr >= 0) {

		i2c_info->irq = intr + INTEL_MID_IRQ_OFFSET;

		pcal9555a->irq_base = gpio_base + INTEL_MID_IRQ_OFFSET;

	} else {

		i2c_info->irq = -1;

		pcal9555a->irq_base = -1;

	}



	strcpy(type, "pcal9555a");

	return pcal9555a;

}



static const struct devs_id pcal9555a_1_dev_id __initconst = {

	.name			= "pcal9555a-1",

	.type			= SFI_DEV_TYPE_I2C,

	.delay			= 1,

	.get_platform_data	= &pcal9555a_platform_data,

};



static const struct devs_id pcal9555a_2_dev_id __initconst = {

	.name			= "pcal9555a-2",

	.type			= SFI_DEV_TYPE_I2C,

	.delay			= 1,

	.get_platform_data	= &pcal9555a_platform_data,

};



static const struct devs_id pcal9555a_3_dev_id __initconst = {

	.name			= "pcal9555a-3",

	.type			= SFI_DEV_TYPE_I2C,

	.delay			= 1,

	.get_platform_data	= &pcal9555a_platform_data,

};



static const struct devs_id pcal9555a_4_dev_id __initconst = {

	.name			= "pcal9555a-4",

	.type			= SFI_DEV_TYPE_I2C,

	.delay			= 1,

	.get_platform_data	= &pcal9555a_platform_data,

};



sfi_device(pcal9555a_1_dev_id);

sfi_device(pcal9555a_2_dev_id);

sfi_device(pcal9555a_3_dev_id);

sfi_device(pcal9555a_4_dev_id);