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authorSrikant Patnaik2015-01-11 12:28:04 +0530
committerSrikant Patnaik2015-01-11 12:28:04 +0530
commit871480933a1c28f8a9fed4c4d34d06c439a7a422 (patch)
tree8718f573808810c2a1e8cb8fb6ac469093ca2784 /ANDROID_3.4.5/drivers/mfd/pcf50633-adc.c
parent9d40ac5867b9aefe0722bc1f110b965ff294d30d (diff)
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Moved, renamed, and deleted files
The original directory structure was scattered and unorganized. Changes are basically to make it look like kernel structure.
Diffstat (limited to 'ANDROID_3.4.5/drivers/mfd/pcf50633-adc.c')
-rw-r--r--ANDROID_3.4.5/drivers/mfd/pcf50633-adc.c258
1 files changed, 0 insertions, 258 deletions
diff --git a/ANDROID_3.4.5/drivers/mfd/pcf50633-adc.c b/ANDROID_3.4.5/drivers/mfd/pcf50633-adc.c
deleted file mode 100644
index 3927c17e..00000000
--- a/ANDROID_3.4.5/drivers/mfd/pcf50633-adc.c
+++ /dev/null
@@ -1,258 +0,0 @@
-/* NXP PCF50633 ADC Driver
- *
- * (C) 2006-2008 by Openmoko, Inc.
- * Author: Balaji Rao <balajirrao@openmoko.org>
- * All rights reserved.
- *
- * Broken down from monstrous PCF50633 driver mainly by
- * Harald Welte, Andy Green and Werner Almesberger
- *
- * 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; either version 2 of the License, or (at your
- * option) any later version.
- *
- * NOTE: This driver does not yet support subtractive ADC mode, which means
- * you can do only one measurement per read request.
- */
-
-#include <linux/kernel.h>
-#include <linux/slab.h>
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/device.h>
-#include <linux/platform_device.h>
-#include <linux/completion.h>
-
-#include <linux/mfd/pcf50633/core.h>
-#include <linux/mfd/pcf50633/adc.h>
-
-struct pcf50633_adc_request {
- int mux;
- int avg;
- void (*callback)(struct pcf50633 *, void *, int);
- void *callback_param;
-};
-
-struct pcf50633_adc_sync_request {
- int result;
- struct completion completion;
-};
-
-#define PCF50633_MAX_ADC_FIFO_DEPTH 8
-
-struct pcf50633_adc {
- struct pcf50633 *pcf;
-
- /* Private stuff */
- struct pcf50633_adc_request *queue[PCF50633_MAX_ADC_FIFO_DEPTH];
- int queue_head;
- int queue_tail;
- struct mutex queue_mutex;
-};
-
-static inline struct pcf50633_adc *__to_adc(struct pcf50633 *pcf)
-{
- return platform_get_drvdata(pcf->adc_pdev);
-}
-
-static void adc_setup(struct pcf50633 *pcf, int channel, int avg)
-{
- channel &= PCF50633_ADCC1_ADCMUX_MASK;
-
- /* kill ratiometric, but enable ACCSW biasing */
- pcf50633_reg_write(pcf, PCF50633_REG_ADCC2, 0x00);
- pcf50633_reg_write(pcf, PCF50633_REG_ADCC3, 0x01);
-
- /* start ADC conversion on selected channel */
- pcf50633_reg_write(pcf, PCF50633_REG_ADCC1, channel | avg |
- PCF50633_ADCC1_ADCSTART | PCF50633_ADCC1_RES_10BIT);
-}
-
-static void trigger_next_adc_job_if_any(struct pcf50633 *pcf)
-{
- struct pcf50633_adc *adc = __to_adc(pcf);
- int head;
-
- head = adc->queue_head;
-
- if (!adc->queue[head])
- return;
-
- adc_setup(pcf, adc->queue[head]->mux, adc->queue[head]->avg);
-}
-
-static int
-adc_enqueue_request(struct pcf50633 *pcf, struct pcf50633_adc_request *req)
-{
- struct pcf50633_adc *adc = __to_adc(pcf);
- int head, tail;
-
- mutex_lock(&adc->queue_mutex);
-
- head = adc->queue_head;
- tail = adc->queue_tail;
-
- if (adc->queue[tail]) {
- mutex_unlock(&adc->queue_mutex);
- dev_err(pcf->dev, "ADC queue is full, dropping request\n");
- return -EBUSY;
- }
-
- adc->queue[tail] = req;
- if (head == tail)
- trigger_next_adc_job_if_any(pcf);
- adc->queue_tail = (tail + 1) & (PCF50633_MAX_ADC_FIFO_DEPTH - 1);
-
- mutex_unlock(&adc->queue_mutex);
-
- return 0;
-}
-
-static void pcf50633_adc_sync_read_callback(struct pcf50633 *pcf, void *param,
- int result)
-{
- struct pcf50633_adc_sync_request *req = param;
-
- req->result = result;
- complete(&req->completion);
-}
-
-int pcf50633_adc_sync_read(struct pcf50633 *pcf, int mux, int avg)
-{
- struct pcf50633_adc_sync_request req;
- int ret;
-
- init_completion(&req.completion);
-
- ret = pcf50633_adc_async_read(pcf, mux, avg,
- pcf50633_adc_sync_read_callback, &req);
- if (ret)
- return ret;
-
- wait_for_completion(&req.completion);
-
- return req.result;
-}
-EXPORT_SYMBOL_GPL(pcf50633_adc_sync_read);
-
-int pcf50633_adc_async_read(struct pcf50633 *pcf, int mux, int avg,
- void (*callback)(struct pcf50633 *, void *, int),
- void *callback_param)
-{
- struct pcf50633_adc_request *req;
-
- /* req is freed when the result is ready, in interrupt handler */
- req = kmalloc(sizeof(*req), GFP_KERNEL);
- if (!req)
- return -ENOMEM;
-
- req->mux = mux;
- req->avg = avg;
- req->callback = callback;
- req->callback_param = callback_param;
-
- return adc_enqueue_request(pcf, req);
-}
-EXPORT_SYMBOL_GPL(pcf50633_adc_async_read);
-
-static int adc_result(struct pcf50633 *pcf)
-{
- u8 adcs1, adcs3;
- u16 result;
-
- adcs1 = pcf50633_reg_read(pcf, PCF50633_REG_ADCS1);
- adcs3 = pcf50633_reg_read(pcf, PCF50633_REG_ADCS3);
- result = (adcs1 << 2) | (adcs3 & PCF50633_ADCS3_ADCDAT1L_MASK);
-
- dev_dbg(pcf->dev, "adc result = %d\n", result);
-
- return result;
-}
-
-static void pcf50633_adc_irq(int irq, void *data)
-{
- struct pcf50633_adc *adc = data;
- struct pcf50633 *pcf = adc->pcf;
- struct pcf50633_adc_request *req;
- int head, res;
-
- mutex_lock(&adc->queue_mutex);
- head = adc->queue_head;
-
- req = adc->queue[head];
- if (WARN_ON(!req)) {
- dev_err(pcf->dev, "pcf50633-adc irq: ADC queue empty!\n");
- mutex_unlock(&adc->queue_mutex);
- return;
- }
- adc->queue[head] = NULL;
- adc->queue_head = (head + 1) &
- (PCF50633_MAX_ADC_FIFO_DEPTH - 1);
-
- res = adc_result(pcf);
- trigger_next_adc_job_if_any(pcf);
-
- mutex_unlock(&adc->queue_mutex);
-
- req->callback(pcf, req->callback_param, res);
- kfree(req);
-}
-
-static int __devinit pcf50633_adc_probe(struct platform_device *pdev)
-{
- struct pcf50633_adc *adc;
-
- adc = kzalloc(sizeof(*adc), GFP_KERNEL);
- if (!adc)
- return -ENOMEM;
-
- adc->pcf = dev_to_pcf50633(pdev->dev.parent);
- platform_set_drvdata(pdev, adc);
-
- pcf50633_register_irq(adc->pcf, PCF50633_IRQ_ADCRDY,
- pcf50633_adc_irq, adc);
-
- mutex_init(&adc->queue_mutex);
-
- return 0;
-}
-
-static int __devexit pcf50633_adc_remove(struct platform_device *pdev)
-{
- struct pcf50633_adc *adc = platform_get_drvdata(pdev);
- int i, head;
-
- pcf50633_free_irq(adc->pcf, PCF50633_IRQ_ADCRDY);
-
- mutex_lock(&adc->queue_mutex);
- head = adc->queue_head;
-
- if (WARN_ON(adc->queue[head]))
- dev_err(adc->pcf->dev,
- "adc driver removed with request pending\n");
-
- for (i = 0; i < PCF50633_MAX_ADC_FIFO_DEPTH; i++)
- kfree(adc->queue[i]);
-
- mutex_unlock(&adc->queue_mutex);
- kfree(adc);
-
- return 0;
-}
-
-static struct platform_driver pcf50633_adc_driver = {
- .driver = {
- .name = "pcf50633-adc",
- },
- .probe = pcf50633_adc_probe,
- .remove = __devexit_p(pcf50633_adc_remove),
-};
-
-module_platform_driver(pcf50633_adc_driver);
-
-MODULE_AUTHOR("Balaji Rao <balajirrao@openmoko.org>");
-MODULE_DESCRIPTION("PCF50633 adc driver");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS("platform:pcf50633-adc");
-