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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: Andy 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: Ingo Molnar <mingo@kernel.org>
hifive-unleashed-5.1
Andy Shevchenko 2016-06-15 12:48:53 +03:00 committed by Ingo Molnar
parent 5823d0893e
commit 0068827215
2 changed files with 103 additions and 2 deletions
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6
arch/x86/platform/intel-mid/device_libs/Makefile
View File

@ -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

99
arch/x86/platform/intel-mid/device_libs/platform_pcal9555a.c 100644
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@ -0,0 +1,99 @@
/*
* 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);