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>

diff --git a/arch/x86/platform/intel-mid/device_libs/Makefile b/arch/x86/platform/intel-mid/device_libs/Makefile
index 91ec9f8..abe8ba8 100644 (file)
--- 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 (file)
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);