gpio: Drop smp2p and smsm implementations
authorBjorn Andersson <bjorn.andersson@linaro.org>
Thu, 9 Jun 2016 05:51:04 +0000 (22:51 -0700)
committerNicolas Dechesne <nicolas.dechesne@linaro.org>
Tue, 21 Jun 2016 08:02:40 +0000 (11:02 +0300)
The smem state implementations where rejected by the GPIO maintainer and
has been superseeded. Remove these old and rejected implementations.

Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
drivers/gpio/Kconfig
drivers/gpio/Makefile
drivers/gpio/gpio-qcom-smp2p.c [deleted file]
drivers/gpio/gpio-qcom-smsm.c [deleted file]

index caf3651..b18bea0 100644 (file)
@@ -337,21 +337,6 @@ config GPIO_PXA
        help
          Say yes here to support the PXA GPIO device
 
-config GPIO_QCOM_SMSM
-       bool "Qualcomm Shared Memory State Machine"
-       depends on QCOM_SMEM
-       help
-         Say yes here to support the Qualcomm Shared Memory State Machine.
-         The state machine is represented by bits in shared memory and is
-         exposed to the system as GPIOs.
-
-config GPIO_QCOM_SMP2P
-       bool "Qualcomm Shared Memory Point to Point support"
-       depends on QCOM_SMEM
-       help
-         Say yes here to support the Qualcomm Shared Memory Point to Point
-         protocol, exposed to the system as GPIOs.
-
 config GPIO_RCAR
        tristate "Renesas R-Car GPIO"
        depends on ARCH_SHMOBILE || COMPILE_TEST
index 6c9d22e..986dbd8 100644 (file)
@@ -76,8 +76,6 @@ obj-$(CONFIG_GPIO_PCF857X)    += gpio-pcf857x.o
 obj-$(CONFIG_GPIO_PCH)         += gpio-pch.o
 obj-$(CONFIG_GPIO_PL061)       += gpio-pl061.o
 obj-$(CONFIG_GPIO_PXA)         += gpio-pxa.o
-obj-$(CONFIG_GPIO_QCOM_SMSM)   += gpio-qcom-smsm.o
-obj-$(CONFIG_GPIO_QCOM_SMP2P)  += gpio-qcom-smp2p.o
 obj-$(CONFIG_GPIO_RC5T583)     += gpio-rc5t583.o
 obj-$(CONFIG_GPIO_RDC321X)     += gpio-rdc321x.o
 obj-$(CONFIG_GPIO_RCAR)                += gpio-rcar.o
diff --git a/drivers/gpio/gpio-qcom-smp2p.c b/drivers/gpio/gpio-qcom-smp2p.c
deleted file mode 100644 (file)
index 164f39a..0000000
+++ /dev/null
@@ -1,590 +0,0 @@
-/*
- * Copyright (c) 2015, Sony Mobile Communications AB.
- * Copyright (c) 2012-2013, The Linux Foundation. All rights reserved.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 and
- * only version 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- */
-
-#include <linux/module.h>
-#include <linux/platform_device.h>
-#include <linux/of_platform.h>
-#include <linux/io.h>
-#include <linux/interrupt.h>
-#include <linux/memblock.h>
-#include <linux/slab.h>
-#include <linux/of_address.h>
-#include <linux/of_irq.h>
-#include <linux/regmap.h>
-#include <linux/list.h>
-#include <linux/gpio.h>
-#include <linux/mfd/syscon.h>
-
-#include <linux/delay.h>
-
-#include <linux/soc/qcom/smem.h>
-
-/*
- * The Shared Memory Point to Point (SMP2P) protocol facilitates communication
- * of a single 32-bit value between two processors.  Each value has a single
- * writer (the local side) and a single reader (the remote side). Values are
- * uniquely identified in the system by the directed edge (local processor ID
- * to remote processor ID) and a string identifier.
- *
- * Each processor is responsible for creating the outgoing SMEM items and each
- * item is writable by the local processor and readable by the remote
- * processor.  By using two separate SMEM items that are single-reader and
- * single-writer, SMP2P does not require any remote locking mechanisms.
- *
- * The driver uses the Linux GPIO and interrupt framework to expose a virtual
- * GPIO for each outbound entry and a virtual interrupt controller for each
- * inbound entry.
- */
-
-#define SMP2P_MAX_ENTRY 16
-#define SMP2P_MAX_ENTRY_NAME 16
-
-#define SMP2P_FEATURE_SSR_ACK 0x1
-
-#define SMP2P_MAGIC 0x504d5324
-
-/**
- * struct smp2p_smem_item - in memory communication structure
- * @magic:             magic number
- * @version:           version - must be 1
- * @features:          features flag - currently unused
- * @local_pid:         processor id of sending end
- * @remote_pid:                processor id of receiving end
- * @total_entries:     number of entries - always SMP2P_MAX_ENTRY
- * @valid_entries:     number of allocated entries
- * @flags:
- * @entries:           individual communication entries
- *     @name:          name of the entry
- *     @value:         content of the entry
- */
-struct smp2p_smem_item {
-       u32 magic;
-       u8 version;
-       unsigned features:24;
-       u16 local_pid;
-       u16 remote_pid;
-       u16 total_entries;
-       u16 valid_entries;
-       u32 flags;
-
-       struct {
-               u8 name[SMP2P_MAX_ENTRY_NAME];
-               u32 value;
-       } entries[SMP2P_MAX_ENTRY];
-} __packed;
-
-/**
- * struct smp2p_entry - driver context matching one entry
- * @node:      list entry to keep track of allocated entries
- * @smp2p:     reference to the device driver context
- * @name:      name of the entry, to match against smp2p_smem_item
- * @value:     pointer to smp2p_smem_item entry value
- * @last_value:        last handled value
- * @domain:    irq_domain for inbound entries
- * @irq_enabled:bitmap to track enabled irq bits
- * @irq_rising:        bitmap to mark irq bits for rising detection
- * @irq_falling:bitmap to mark irq bits for falling detection
- * @chip:      gpio_chip for outbound entries
- */
-struct smp2p_entry {
-       struct list_head node;
-       struct qcom_smp2p *smp2p;
-
-       const char *name;
-       u32 *value;
-       u32 last_value;
-
-       struct irq_domain *domain;
-       DECLARE_BITMAP(irq_enabled, 32);
-       DECLARE_BITMAP(irq_rising, 32);
-       DECLARE_BITMAP(irq_falling, 32);
-
-       struct gpio_chip chip;
-};
-
-#define SMP2P_INBOUND  0
-#define SMP2P_OUTBOUND 1
-
-/**
- * struct qcom_smp2p - device driver context
- * @dev:       device driver handle
- * @in:                pointer to the inbound smem item
- * @smem_items:        ids of the two smem items
- * @valid_entries: already scanned inbound entries
- * @local_pid: processor id of the inbound edge
- * @remote_pid:        processor id of the outbound edge
- * @ipc_regmap:        regmap for the outbound ipc
- * @ipc_offset:        offset within the regmap
- * @ipc_bit:   bit in regmap@offset to kick to signal remote processor
- * @inbound:   list of inbound entries
- * @outbound:  list of outbound entries
- */
-struct qcom_smp2p {
-       struct device *dev;
-
-       struct smp2p_smem_item *in;
-       struct smp2p_smem_item *out;
-
-       unsigned smem_items[SMP2P_OUTBOUND + 1];
-
-       unsigned valid_entries;
-
-       unsigned local_pid;
-       unsigned remote_pid;
-
-       struct regmap *ipc_regmap;
-       int ipc_offset;
-       int ipc_bit;
-
-       struct list_head inbound;
-       struct list_head outbound;
-};
-
-static void qcom_smp2p_kick(struct qcom_smp2p *smp2p)
-{
-       /* Make sure any updated data is written before the kick */
-       wmb();
-       regmap_write(smp2p->ipc_regmap, smp2p->ipc_offset, BIT(smp2p->ipc_bit));
-}
-
-static irqreturn_t qcom_smp2p_intr(int irq, void *data)
-{
-       struct smp2p_smem_item *in;
-       struct smp2p_entry *entry;
-       struct qcom_smp2p *smp2p = data;
-       unsigned smem_id = smp2p->smem_items[SMP2P_INBOUND];
-       unsigned pid = smp2p->remote_pid;
-       size_t size;
-       int irq_pin;
-       u32 status;
-       u32 val;
-       int i;
-       u8 tmp_name[SMP2P_MAX_ENTRY_NAME];
-
-       in = smp2p->in;
-
-       /* Acquire smem item, if not already found */
-       if (!in) {
-               in = qcom_smem_get(pid, smem_id, &size);
-               if (IS_ERR(in)) {
-                       dev_err(smp2p->dev,
-                                       "Unable to acquire remote smp2p item\n");
-                       return IRQ_HANDLED;
-               }
-
-               smp2p->in = in;
-       }
-
-       /* Match newly created entries */
-       for (i = smp2p->valid_entries; i < in->valid_entries; i++) {
-               list_for_each_entry(entry, &smp2p->inbound, node) {
-                       memcpy_fromio(tmp_name, in->entries[i].name,
-                                       SMP2P_MAX_ENTRY_NAME);
-                       if (!strcmp(tmp_name, entry->name)) {
-                               entry->value = &in->entries[i].value;
-                               break;
-                       }
-               }
-       }
-       smp2p->valid_entries = i;
-
-       /* Fire interrupts based on any value changes */
-       list_for_each_entry(entry, &smp2p->inbound, node) {
-               /* Ignore entries not yet allocated by the remote side */
-               if (!entry->value)
-                       continue;
-
-               val = *entry->value;
-
-               status = val ^ entry->last_value;
-               entry->last_value = val;
-
-               /* No changes of this entry? */
-               if (!status)
-                       continue;
-
-               for_each_set_bit(i, entry->irq_enabled, 32) {
-                       if (!(status & BIT(i)))
-                               continue;
-
-                       if (val & BIT(i)) {
-                               if (test_bit(i, entry->irq_rising)) {
-                                       irq_pin = irq_find_mapping(entry->domain, i);
-                                       handle_nested_irq(irq_pin);
-                               }
-                       } else {
-                               if (test_bit(i, entry->irq_falling)) {
-                                       irq_pin = irq_find_mapping(entry->domain, i);
-                                       handle_nested_irq(irq_pin);
-                               }
-                       }
-
-               }
-       }
-
-       return IRQ_HANDLED;
-}
-
-static void smp2p_mask_irq(struct irq_data *irqd)
-{
-       struct smp2p_entry *entry = irq_data_get_irq_chip_data(irqd);
-       irq_hw_number_t irq = irqd_to_hwirq(irqd);
-
-       clear_bit(irq, entry->irq_enabled);
-}
-
-static void smp2p_unmask_irq(struct irq_data *irqd)
-{
-       struct smp2p_entry *entry = irq_data_get_irq_chip_data(irqd);
-       irq_hw_number_t irq = irqd_to_hwirq(irqd);
-
-       set_bit(irq, entry->irq_enabled);
-}
-
-static int smp2p_set_irq_type(struct irq_data *irqd, unsigned int type)
-{
-       struct smp2p_entry *entry = irq_data_get_irq_chip_data(irqd);
-       irq_hw_number_t irq = irqd_to_hwirq(irqd);
-
-       if (!(type & IRQ_TYPE_EDGE_BOTH))
-               return -EINVAL;
-
-       if (type & IRQ_TYPE_EDGE_RISING)
-               set_bit(irq, entry->irq_rising);
-       else
-               clear_bit(irq, entry->irq_rising);
-
-       if (type & IRQ_TYPE_EDGE_FALLING)
-               set_bit(irq, entry->irq_falling);
-       else
-               clear_bit(irq, entry->irq_falling);
-
-       return 0;
-}
-
-static struct irq_chip smp2p_irq_chip = {
-       .name           = "smp2p",
-       .irq_mask       = smp2p_mask_irq,
-       .irq_unmask     = smp2p_unmask_irq,
-       .irq_set_type   = smp2p_set_irq_type,
-};
-
-static int smp2p_irq_map(struct irq_domain *d,
-                        unsigned int irq,
-                        irq_hw_number_t hw)
-{
-       struct smp2p_entry *entry = d->host_data;
-
-       irq_set_chip_and_handler(irq, &smp2p_irq_chip, handle_level_irq);
-       irq_set_chip_data(irq, entry);
-       irq_set_nested_thread(irq, 1);
-
-       irq_set_noprobe(irq);
-
-       return 0;
-}
-
-static const struct irq_domain_ops smp2p_irq_ops = {
-       .map = smp2p_irq_map,
-       .xlate = irq_domain_xlate_twocell,
-};
-
-static int smp2p_gpio_direction_output(struct gpio_chip *chip,
-                                      unsigned offset,
-                                      int value)
-{
-       struct smp2p_entry *entry = container_of(chip, struct smp2p_entry, chip);
-
-       if (value)
-               *entry->value |= BIT(offset);
-       else
-               *entry->value &= ~BIT(offset);
-
-       qcom_smp2p_kick(entry->smp2p);
-
-       return 0;
-}
-
-static void smp2p_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
-{
-       smp2p_gpio_direction_output(chip, offset, value);
-}
-
-static int qcom_smp2p_inbound_entry(struct qcom_smp2p *smp2p,
-                                   struct smp2p_entry *entry,
-                                   struct device_node *node)
-{
-       entry->domain = irq_domain_add_linear(node, 32, &smp2p_irq_ops, entry);
-       if (!entry->domain) {
-               dev_err(smp2p->dev, "failed to add irq_domain\n");
-               return -ENOMEM;
-       }
-
-       return 0;
-}
-
-static int qcom_smp2p_outbound_entry(struct qcom_smp2p *smp2p,
-                                    struct smp2p_entry *entry,
-                                    struct device_node *node)
-{
-       struct smp2p_smem_item *out = smp2p->out;
-       struct gpio_chip *chip;
-       int ret;
-
-       /* Allocate an entry from the smem item */
-       memcpy_toio(out->entries[out->valid_entries].name, entry->name, SMP2P_MAX_ENTRY_NAME);
-       out->valid_entries++;
-
-       /* Make the logical entry reference the physical value */
-       entry->value = &out->entries[out->valid_entries].value;
-
-       chip = &entry->chip;
-       chip->base = -1;
-       chip->ngpio = 32;
-       chip->label = entry->name;
-       chip->dev = smp2p->dev;
-       chip->owner = THIS_MODULE;
-       chip->of_node = node;
-
-       chip->set = smp2p_gpio_set;
-       chip->direction_output = smp2p_gpio_direction_output;
-
-       ret = gpiochip_add(chip);
-       if (ret)
-               dev_err(smp2p->dev, "failed register gpiochip\n");
-
-       return 0;
-}
-
-static int qcom_smp2p_alloc_outbound_item(struct qcom_smp2p *smp2p)
-{
-       struct smp2p_smem_item *out;
-       unsigned smem_id = smp2p->smem_items[SMP2P_OUTBOUND];
-       unsigned pid = smp2p->remote_pid;
-       int ret;
-
-       ret = qcom_smem_alloc(pid, smem_id, sizeof(*out));
-       if (ret < 0 && ret != -EEXIST) {
-               if (ret != -EPROBE_DEFER)
-                       dev_err(smp2p->dev,
-                               "unable to allocate local smp2p item\n");
-               return ret;
-       }
-
-       out = qcom_smem_get(pid, smem_id, NULL);
-       if (IS_ERR(out)) {
-               dev_err(smp2p->dev, "Unable to acquire local smp2p item\n");
-               return PTR_ERR(out);
-       }
-
-       memset_io(out, 0, sizeof(*out));
-       out->magic = SMP2P_MAGIC;
-       out->local_pid = smp2p->local_pid;
-       out->remote_pid = smp2p->remote_pid;
-       out->total_entries = SMP2P_MAX_ENTRY;
-       out->valid_entries = 0;
-
-       /*
-        * Make sure the rest of the header is written before we validate the
-        * item by writing a valid version number.
-        */
-       wmb();
-       out->version = 1;
-
-       qcom_smp2p_kick(smp2p);
-
-       smp2p->out = out;
-
-       return 0;
-}
-
-static int smp2p_parse_ipc(struct qcom_smp2p *smp2p)
-{
-       struct device_node *syscon;
-       struct device *dev = smp2p->dev;
-       const char *key;
-       int ret;
-
-       syscon = of_parse_phandle(dev->of_node, "qcom,ipc", 0);
-       if (!syscon) {
-               dev_err(dev, "no qcom,ipc node\n");
-               return -ENODEV;
-       }
-
-       smp2p->ipc_regmap = syscon_node_to_regmap(syscon);
-       if (IS_ERR(smp2p->ipc_regmap))
-               return PTR_ERR(smp2p->ipc_regmap);
-
-       key = "qcom,ipc";
-       ret = of_property_read_u32_index(dev->of_node, key, 1, &smp2p->ipc_offset);
-       if (ret < 0) {
-               dev_err(dev, "no offset in %s\n", key);
-               return -EINVAL;
-       }
-
-       ret = of_property_read_u32_index(dev->of_node, key, 2, &smp2p->ipc_bit);
-       if (ret < 0) {
-               dev_err(dev, "no bit in %s\n", key);
-               return -EINVAL;
-       }
-
-       return 0;
-}
-
-static int qcom_smp2p_probe(struct platform_device *pdev)
-{
-       struct smp2p_entry *entry;
-       struct device_node *node;
-       struct qcom_smp2p *smp2p;
-       const char *key;
-       int irq;
-       int ret;
-
-       smp2p = devm_kzalloc(&pdev->dev, sizeof(*smp2p), GFP_KERNEL);
-       if (!smp2p)
-               return -ENOMEM;
-
-       smp2p->dev = &pdev->dev;
-       INIT_LIST_HEAD(&smp2p->inbound);
-       INIT_LIST_HEAD(&smp2p->outbound);
-
-       platform_set_drvdata(pdev, smp2p);
-
-       ret = smp2p_parse_ipc(smp2p);
-       if (ret)
-               return ret;
-
-       key = "qcom,smem";
-       ret = of_property_read_u32_array(pdev->dev.of_node, key,
-                                        smp2p->smem_items, 2);
-       if (ret)
-               return ret;
-
-       key = "qcom,local-pid";
-       ret = of_property_read_u32(pdev->dev.of_node, key, &smp2p->local_pid);
-       if (ret < 0) {
-               dev_err(&pdev->dev, "failed to read %s\n", key);
-               return -EINVAL;
-       }
-
-       key = "qcom,remote-pid";
-       ret = of_property_read_u32(pdev->dev.of_node, key, &smp2p->remote_pid);
-       if (ret < 0) {
-               dev_err(&pdev->dev, "failed to read %s\n", key);
-               return -EINVAL;
-       }
-
-       irq = platform_get_irq(pdev, 0);
-       if (irq < 0) {
-               dev_err(&pdev->dev, "unable to acquire smp2p interrupt\n");
-               return irq;
-       }
-
-       ret = qcom_smp2p_alloc_outbound_item(smp2p);
-       if (ret < 0)
-               return ret;
-
-       for_each_available_child_of_node(pdev->dev.of_node, node) {
-               entry = devm_kzalloc(&pdev->dev, sizeof(*entry), GFP_KERNEL);
-               if (!entry) {
-                       ret = -ENOMEM;
-                       goto unwind_interfaces;
-               }
-
-               entry->smp2p = smp2p;
-
-               ret = of_property_read_string(node, "qcom,entry-name", &entry->name);
-               if (ret < 0)
-                       goto unwind_interfaces;
-
-               if (of_property_read_bool(node, "qcom,inbound")) {
-                       ret = qcom_smp2p_inbound_entry(smp2p, entry, node);
-                       if (ret < 0)
-                               goto unwind_interfaces;
-
-                       list_add(&entry->node, &smp2p->inbound);
-               } else if (of_property_read_bool(node, "qcom,outbound")) {
-                       ret = qcom_smp2p_outbound_entry(smp2p, entry, node);
-                       if (ret < 0)
-                               goto unwind_interfaces;
-
-                       list_add(&entry->node, &smp2p->outbound);
-               } else {
-                       dev_err(&pdev->dev, "neither inbound nor outbound\n");
-                       ret = -EINVAL;
-                       goto unwind_interfaces;
-               }
-       }
-
-       /* Kick the outgoing edge after allocating entries */
-       qcom_smp2p_kick(smp2p);
-
-       ret = devm_request_threaded_irq(&pdev->dev, irq,
-                                       NULL, qcom_smp2p_intr,
-                                       IRQF_ONESHOT,
-                                       "smp2p", (void *)smp2p);
-       if (ret) {
-               dev_err(&pdev->dev, "failed to request interrupt\n");
-               goto unwind_interfaces;
-       }
-
-
-       return 0;
-
-unwind_interfaces:
-       list_for_each_entry(entry, &smp2p->inbound, node)
-               irq_domain_remove(entry->domain);
-
-       list_for_each_entry(entry, &smp2p->outbound, node)
-               gpiochip_remove(&entry->chip);
-
-       smp2p->out->valid_entries = 0;
-
-       return ret;
-}
-
-static int qcom_smp2p_remove(struct platform_device *pdev)
-{
-       struct qcom_smp2p *smp2p = platform_get_drvdata(pdev);
-       struct smp2p_entry *entry;
-
-       list_for_each_entry(entry, &smp2p->inbound, node)
-               irq_domain_remove(entry->domain);
-
-       list_for_each_entry(entry, &smp2p->outbound, node)
-               gpiochip_remove(&entry->chip);
-
-       smp2p->out->valid_entries = 0;
-
-       return 0;
-}
-
-static const struct of_device_id qcom_smp2p_of_match[] = {
-       { .compatible = "qcom,smp2p" },
-       {}
-};
-MODULE_DEVICE_TABLE(of, qcom_smp2p_of_match);
-
-static struct platform_driver qcom_smp2p_driver = {
-       .probe = qcom_smp2p_probe,
-       .remove = qcom_smp2p_remove,
-       .driver  = {
-               .name  = "qcom_smp2p",
-               .of_match_table = qcom_smp2p_of_match,
-       },
-};
-module_platform_driver(qcom_smp2p_driver);
-
-MODULE_DESCRIPTION("Qualcomm Shared Memory Point to Point driver");
-MODULE_LICENSE("GPL v2");
diff --git a/drivers/gpio/gpio-qcom-smsm.c b/drivers/gpio/gpio-qcom-smsm.c
deleted file mode 100644 (file)
index c3e5103..0000000
+++ /dev/null
@@ -1,327 +0,0 @@
-/*
- * Copyright (c) 2014, Sony Mobile Communications AB.
- * Copyright (c) 2012-2013, The Linux Foundation. All rights reserved.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 and
- * only version 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- */
-
-#include <linux/module.h>
-#include <linux/platform_device.h>
-#include <linux/of_platform.h>
-#include <linux/io.h>
-#include <linux/interrupt.h>
-#include <linux/memblock.h>
-#include <linux/slab.h>
-#include <linux/of_address.h>
-#include <linux/of_irq.h>
-#include <linux/hwspinlock.h>
-#include <linux/regmap.h>
-#include <linux/gpio.h>
-#include <linux/mfd/syscon.h>
-
-#include <linux/delay.h>
-
-#include <linux/soc/qcom/smem.h>
-
-#define SMSM_APPS_STATE 0
-#define SMEM_SMSM_SHARED_STATE 85
-
-#define SMSM_MAX_STATES 8
-
-struct qcom_smsm_state {
-       unsigned state_id;
-       struct gpio_chip chip;
-
-       int irq;
-
-       struct regmap *ipc_regmap;
-       int ipc_bit;
-       int ipc_offset;
-};
-
-struct qcom_smsm {
-       struct device *dev;
-
-       u32 *shared_state;
-       size_t shared_state_size;
-
-       struct qcom_smsm_state states[SMSM_MAX_STATES];
-};
-
-#if 0
-int qcom_smsm_change_state(struct qcom_smsm *smsm, u32 clear_mask, u32 set_mask)
-{
-       u32 state;
-
-       dev_dbg(smsm->dev, "SMSM_APPS_STATE clear 0x%x set 0x%x\n", clear_mask, set_mask);
-       print_hex_dump(KERN_DEBUG, "raw data: ", DUMP_PREFIX_OFFSET, 16, 1, smsm->shared_state, smsm->shared_state_size, true);
-
-       state = readl(&smsm->shared_state[SMSM_APPS_STATE]);
-       state &= ~clear_mask;
-       state |= set_mask;
-       writel(state, &smsm->shared_state[SMSM_APPS_STATE]);
-
-       print_hex_dump(KERN_DEBUG, "raw data: ", DUMP_PREFIX_OFFSET, 16, 1, smsm->shared_state, smsm->shared_state_size, true);
-
-       // qcom_smem_signal(-1, smsm->smem, smsm->signal_offset, smsm->signal_bit);
-
-       return 0;
-}
-EXPORT_SYMBOL(qcom_smsm_change_state);
-#endif
-
-static struct qcom_smsm_state *to_smsm_state(struct gpio_chip *chip)
-{
-       return container_of(chip, struct qcom_smsm_state, chip);
-}
-
-static struct qcom_smsm *to_smsm(struct qcom_smsm_state *state)
-{
-       return container_of(state, struct qcom_smsm, states[state->state_id]);
-}
-
-static int smsm_gpio_direction_input(struct gpio_chip *chip,
-                                    unsigned offset)
-{
-       struct qcom_smsm_state *state = to_smsm_state(chip);
-
-       if (state->state_id == SMSM_APPS_STATE)
-               return -EINVAL;
-       return 0;
-}
-
-static int smsm_gpio_direction_output(struct gpio_chip *chip,
-                                     unsigned offset,
-                                     int value)
-{
-       struct qcom_smsm_state *ipc_state;
-       struct qcom_smsm_state *state = to_smsm_state(chip);
-       struct qcom_smsm *smsm = to_smsm(state);
-       unsigned word;
-       unsigned bit;
-       u32 val;
-       int i;
-
-       /* Only SMSM_APPS_STATE supports writing */
-       if (state->state_id != SMSM_APPS_STATE)
-               return -EINVAL;
-
-       offset += state->state_id * 32;
-
-       word = ALIGN(offset / 32, 4);
-       bit = offset % 32;
-
-       val = readl(smsm->shared_state + word);
-       if (value)
-               val |= BIT(bit);
-       else
-               val &= ~BIT(bit);
-       writel(val, smsm->shared_state + word);
-
-       /* XXX: send out interrupts */
-       for (i = 0; i < SMSM_MAX_STATES; i++) {
-               ipc_state = &smsm->states[i];
-               if (!ipc_state->ipc_regmap)
-                       continue;
-
-               regmap_write(ipc_state->ipc_regmap, ipc_state->ipc_offset, BIT(ipc_state->ipc_bit));
-       }
-
-       dev_err(smsm->dev, "set %d %d\n", offset, value);
-
-       return 0;
-}
-
-static int smsm_gpio_get(struct gpio_chip *chip, unsigned offset)
-{
-       struct qcom_smsm_state *state = to_smsm_state(chip);
-       struct qcom_smsm *smsm = to_smsm(state);
-       unsigned word;
-       unsigned bit;
-       u32 val;
-
-       offset += state->state_id * 32;
-
-       word = ALIGN(offset / 32, 4);
-       bit = offset % 32;
-
-       val = readl(smsm->shared_state + word);
-
-       return !!(val & BIT(bit));
-}
-
-static void smsm_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
-{
-       smsm_gpio_direction_output(chip, offset, value);
-}
-
-static int smsm_gpio_to_irq(struct gpio_chip *chip, unsigned offset)
-{
-       return -EINVAL;
-}
-
-#ifdef CONFIG_DEBUG_FS
-#include <linux/seq_file.h>
-
-static void smsm_gpio_dbg_show(struct seq_file *s, struct gpio_chip *chip)
-{
-       struct qcom_smsm_state *state = to_smsm_state(chip);
-       struct qcom_smsm *smsm = to_smsm(state);
-       unsigned i;
-       u32 val;
-
-       val = readl(smsm->shared_state + state->state_id * 4);
-
-       for (i = 0; i < 32; i++) {
-               if (val & BIT(i))
-                       seq_puts(s, "1");
-               else
-                       seq_puts(s, "0");
-
-               if (i == 7 || i == 15 || i == 23)
-                       seq_puts(s, " ");
-       }
-       seq_puts(s, "\n");
-}
-
-#else
-#define smsm_gpio_dbg_show NULL
-#endif
-
-static struct gpio_chip smsm_gpio_template = {
-       .direction_input = smsm_gpio_direction_input,
-       .direction_output = smsm_gpio_direction_output,
-       .get = smsm_gpio_get,
-       .set = smsm_gpio_set,
-       .to_irq = smsm_gpio_to_irq,
-       .dbg_show = smsm_gpio_dbg_show,
-       .owner = THIS_MODULE,
-};
-
-static int qcom_smsm_probe(struct platform_device *pdev)
-{
-       struct qcom_smsm_state *state;
-       struct device_node *syscon_np;
-       struct device_node *node;
-       struct qcom_smsm *smsm;
-       char *key;
-       u32 sid;
-       int ret;
-
-       smsm = devm_kzalloc(&pdev->dev, sizeof(*smsm), GFP_KERNEL);
-       if (!smsm)
-               return -ENOMEM;
-       smsm->dev = &pdev->dev;
-
-       ret = qcom_smem_alloc(-1, SMEM_SMSM_SHARED_STATE, 8 * sizeof(uint32_t));
-       if (ret < 0 && ret != -EEXIST) {
-               dev_err(&pdev->dev, "unable to allocate shared state entry\n");
-               return ret;
-       }
-
-       smsm->shared_state = qcom_smem_get(-1, SMEM_SMSM_SHARED_STATE,
-                           &smsm->shared_state_size);
-       if (IS_ERR(smsm->shared_state)) {
-               dev_err(&pdev->dev, "Unable to acquire shared state entry\n");
-               return PTR_ERR(smsm->shared_state);
-       }
-
-       dev_err(smsm->dev, "SMEM_SMSM_SHARED_STATE: %d, %zu\n", ret, smsm->shared_state_size);
-       print_hex_dump(KERN_DEBUG, "raw data: ", DUMP_PREFIX_OFFSET, 16, 1, smsm->shared_state, smsm->shared_state_size, true);
-
-       for_each_child_of_node(pdev->dev.of_node, node) {
-               key = "reg";
-               ret = of_property_read_u32(node, key, &sid);
-               if (ret || sid >= SMSM_MAX_STATES) {
-                       dev_err(&pdev->dev, "smsm state missing %s\n", key);
-                       return -EINVAL;
-               }
-               state = &smsm->states[sid];
-               state->state_id = sid;
-
-               state->chip = smsm_gpio_template;
-               state->chip.base = -1;
-               state->chip.dev = &pdev->dev;
-               state->chip.of_node = node;
-               state->chip.label = node->name;
-               state->chip.ngpio = 8 * sizeof(u32);
-               ret = gpiochip_add(&state->chip);
-               if (ret) {
-                       dev_err(&pdev->dev, "failed register gpiochip\n");
-                       // goto wooha;
-               }
-
-               /* The remaining properties are only for non-apps state */
-               if (sid == SMSM_APPS_STATE)
-                       continue;
-
-               state->irq = irq_of_parse_and_map(node, 0);
-               if (state->irq < 0 && state->irq != -EINVAL) {
-                       dev_err(&pdev->dev, "failed to parse smsm interrupt\n");
-                       return -EINVAL;
-               }
-
-               syscon_np = of_parse_phandle(node, "qcom,ipc", 0);
-               if (!syscon_np) {
-                       dev_err(&pdev->dev, "no qcom,ipc node\n");
-                       return -ENODEV;
-               }
-
-               state->ipc_regmap = syscon_node_to_regmap(syscon_np);
-               if (IS_ERR(state->ipc_regmap))
-                       return PTR_ERR(state->ipc_regmap);
-
-               key = "qcom,ipc";
-               ret = of_property_read_u32_index(node, key, 1, &state->ipc_offset);
-               if (ret < 0) {
-                       dev_err(&pdev->dev, "no offset in %s\n", key);
-                       return -EINVAL;
-               }
-
-               ret = of_property_read_u32_index(node, key, 2, &state->ipc_bit);
-               if (ret < 0) {
-                       dev_err(&pdev->dev, "no bit in %s\n", key);
-                       return -EINVAL;
-               }
-
-       }
-
-       return 0;
-}
-
-static const struct of_device_id qcom_smsm_of_match[] = {
-       { .compatible = "qcom,smsm" },
-       {}
-};
-MODULE_DEVICE_TABLE(of, qcom_smsm_of_match);
-
-static struct platform_driver qcom_smsm_driver = {
-       .probe          = qcom_smsm_probe,
-       .driver  = {
-               .name  = "qcom_smsm",
-               .owner = THIS_MODULE,
-               .of_match_table = qcom_smsm_of_match,
-       },
-};
-
-static int __init qcom_smsm_init(void)
-{
-       return platform_driver_register(&qcom_smsm_driver);
-}
-arch_initcall(qcom_smsm_init);
-
-static void __exit qcom_smsm_exit(void)
-{
-       platform_driver_unregister(&qcom_smsm_driver);
-}
-module_exit(qcom_smsm_exit)
-
-MODULE_DESCRIPTION("Qualcomm Shared Memory Signaling Mechanism");
-MODULE_LICENSE("GPLv2");