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author | Andy Shevchenko <andriy.shevchenko@linux.intel.com> | 2016-06-15 12:48:53 +0300 |
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committer | Ingo Molnar <mingo@kernel.org> | 2016-06-15 12:52:54 +0200 |
commit | 00688272157d83e48d1369d7d11c479571324e40 (patch) | |
tree | 3198d239c868cc70840f4c9a90b5911486f6eb6a | |
parent | 5823d0893ec284f37902e2ecd332dbb396a143d1 (diff) | |
download | op-kernel-dev-00688272157d83e48d1369d7d11c479571324e40.zip op-kernel-dev-00688272157d83e48d1369d7d11c479571324e40.tar.gz |
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>
-rw-r--r-- | arch/x86/platform/intel-mid/device_libs/Makefile | 6 | ||||
-rw-r--r-- | arch/x86/platform/intel-mid/device_libs/platform_pcal9555a.c | 99 |
2 files changed, 103 insertions, 2 deletions
diff --git a/arch/x86/platform/intel-mid/device_libs/Makefile b/arch/x86/platform/intel-mid/device_libs/Makefile index 91ec9f8..abe8ba8 100644 --- a/arch/x86/platform/intel-mid/device_libs/Makefile +++ b/arch/x86/platform/intel-mid/device_libs/Makefile @@ -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 diff --git a/arch/x86/platform/intel-mid/device_libs/platform_pcal9555a.c b/arch/x86/platform/intel-mid/device_libs/platform_pcal9555a.c new file mode 100644 index 0000000..429a941 --- /dev/null +++ b/arch/x86/platform/intel-mid/device_libs/platform_pcal9555a.c @@ -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); |