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bf4afc53b7
This was done entirely with mindless brute force, using
git grep -l '\<k[vmz]*alloc_objs*(.*, GFP_KERNEL)' |
xargs sed -i 's/\(alloc_objs*(.*\), GFP_KERNEL)/\1)/'
to convert the new alloc_obj() users that had a simple GFP_KERNEL
argument to just drop that argument.
Note that due to the extreme simplicity of the scripting, any slightly
more complex cases spread over multiple lines would not be triggered:
they definitely exist, but this covers the vast bulk of the cases, and
the resulting diff is also then easier to check automatically.
For the same reason the 'flex' versions will be done as a separate
conversion.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
288 lines
6.3 KiB
C
288 lines
6.3 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* wm831x-auxadc.c -- AUXADC for Wolfson WM831x PMICs
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*
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* Copyright 2009-2011 Wolfson Microelectronics PLC.
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*
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* Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/delay.h>
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#include <linux/mfd/core.h>
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#include <linux/slab.h>
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#include <linux/list.h>
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#include <linux/mfd/wm831x/core.h>
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#include <linux/mfd/wm831x/pdata.h>
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#include <linux/mfd/wm831x/irq.h>
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#include <linux/mfd/wm831x/auxadc.h>
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#include <linux/mfd/wm831x/otp.h>
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#include <linux/mfd/wm831x/regulator.h>
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struct wm831x_auxadc_req {
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struct list_head list;
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enum wm831x_auxadc input;
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int val;
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struct completion done;
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};
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static int wm831x_auxadc_read_irq(struct wm831x *wm831x,
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enum wm831x_auxadc input)
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{
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struct wm831x_auxadc_req *req;
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int ret;
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bool ena = false;
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req = kzalloc_obj(*req);
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if (!req)
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return -ENOMEM;
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init_completion(&req->done);
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req->input = input;
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req->val = -ETIMEDOUT;
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mutex_lock(&wm831x->auxadc_lock);
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/* Enqueue the request */
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list_add(&req->list, &wm831x->auxadc_pending);
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ena = !wm831x->auxadc_active;
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if (ena) {
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ret = wm831x_set_bits(wm831x, WM831X_AUXADC_CONTROL,
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WM831X_AUX_ENA, WM831X_AUX_ENA);
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if (ret != 0) {
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dev_err(wm831x->dev, "Failed to enable AUXADC: %d\n",
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ret);
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goto out;
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}
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}
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/* Enable the conversion if not already running */
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if (!(wm831x->auxadc_active & (1 << input))) {
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ret = wm831x_set_bits(wm831x, WM831X_AUXADC_SOURCE,
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1 << input, 1 << input);
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if (ret != 0) {
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dev_err(wm831x->dev,
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"Failed to set AUXADC source: %d\n", ret);
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goto out;
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}
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wm831x->auxadc_active |= 1 << input;
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}
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/* We convert at the fastest rate possible */
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if (ena) {
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ret = wm831x_set_bits(wm831x, WM831X_AUXADC_CONTROL,
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WM831X_AUX_CVT_ENA |
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WM831X_AUX_RATE_MASK,
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WM831X_AUX_CVT_ENA |
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WM831X_AUX_RATE_MASK);
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if (ret != 0) {
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dev_err(wm831x->dev, "Failed to start AUXADC: %d\n",
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ret);
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goto out;
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}
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}
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mutex_unlock(&wm831x->auxadc_lock);
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/* Wait for an interrupt */
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wait_for_completion_timeout(&req->done, msecs_to_jiffies(500));
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mutex_lock(&wm831x->auxadc_lock);
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ret = req->val;
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out:
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list_del(&req->list);
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mutex_unlock(&wm831x->auxadc_lock);
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kfree(req);
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return ret;
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}
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static irqreturn_t wm831x_auxadc_irq(int irq, void *irq_data)
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{
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struct wm831x *wm831x = irq_data;
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struct wm831x_auxadc_req *req;
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int ret, input, val;
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ret = wm831x_reg_read(wm831x, WM831X_AUXADC_DATA);
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if (ret < 0) {
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dev_err(wm831x->dev,
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"Failed to read AUXADC data: %d\n", ret);
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return IRQ_NONE;
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}
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input = ((ret & WM831X_AUX_DATA_SRC_MASK)
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>> WM831X_AUX_DATA_SRC_SHIFT) - 1;
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if (input == 14)
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input = WM831X_AUX_CAL;
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val = ret & WM831X_AUX_DATA_MASK;
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mutex_lock(&wm831x->auxadc_lock);
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/* Disable this conversion, we're about to complete all users */
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wm831x_set_bits(wm831x, WM831X_AUXADC_SOURCE,
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1 << input, 0);
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wm831x->auxadc_active &= ~(1 << input);
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/* Turn off the entire convertor if idle */
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if (!wm831x->auxadc_active)
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wm831x_reg_write(wm831x, WM831X_AUXADC_CONTROL, 0);
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/* Wake up any threads waiting for this request */
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list_for_each_entry(req, &wm831x->auxadc_pending, list) {
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if (req->input == input) {
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req->val = val;
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complete(&req->done);
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}
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}
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mutex_unlock(&wm831x->auxadc_lock);
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return IRQ_HANDLED;
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}
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static int wm831x_auxadc_read_polled(struct wm831x *wm831x,
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enum wm831x_auxadc input)
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{
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int ret, src;
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mutex_lock(&wm831x->auxadc_lock);
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ret = wm831x_set_bits(wm831x, WM831X_AUXADC_CONTROL,
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WM831X_AUX_ENA, WM831X_AUX_ENA);
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if (ret < 0) {
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dev_err(wm831x->dev, "Failed to enable AUXADC: %d\n", ret);
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goto out;
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}
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/* We force a single source at present */
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src = input;
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ret = wm831x_reg_write(wm831x, WM831X_AUXADC_SOURCE,
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1 << src);
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if (ret < 0) {
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dev_err(wm831x->dev, "Failed to set AUXADC source: %d\n", ret);
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goto out;
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}
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ret = wm831x_set_bits(wm831x, WM831X_AUXADC_CONTROL,
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WM831X_AUX_CVT_ENA, WM831X_AUX_CVT_ENA);
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if (ret < 0) {
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dev_err(wm831x->dev, "Failed to start AUXADC: %d\n", ret);
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goto disable;
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}
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/* If we're not using interrupts then read the interrupt status register */
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msleep(20);
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ret = wm831x_reg_read(wm831x, WM831X_INTERRUPT_STATUS_1);
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if (ret < 0) {
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dev_err(wm831x->dev,
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"ISR 1 read failed: %d\n", ret);
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goto disable;
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}
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/* Did it complete? */
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if (ret & WM831X_AUXADC_DATA_EINT) {
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wm831x_reg_write(wm831x, WM831X_INTERRUPT_STATUS_1,
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WM831X_AUXADC_DATA_EINT);
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} else {
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dev_err(wm831x->dev,
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"AUXADC conversion timeout\n");
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ret = -EBUSY;
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goto disable;
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}
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ret = wm831x_reg_read(wm831x, WM831X_AUXADC_DATA);
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if (ret < 0) {
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dev_err(wm831x->dev,
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"Failed to read AUXADC data: %d\n", ret);
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goto disable;
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}
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src = ((ret & WM831X_AUX_DATA_SRC_MASK)
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>> WM831X_AUX_DATA_SRC_SHIFT) - 1;
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if (src == 14)
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src = WM831X_AUX_CAL;
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if (src != input) {
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dev_err(wm831x->dev, "Data from source %d not %d\n",
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src, input);
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ret = -EINVAL;
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} else {
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ret &= WM831X_AUX_DATA_MASK;
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}
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disable:
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wm831x_set_bits(wm831x, WM831X_AUXADC_CONTROL, WM831X_AUX_ENA, 0);
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out:
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mutex_unlock(&wm831x->auxadc_lock);
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return ret;
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}
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/**
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* wm831x_auxadc_read: Read a value from the WM831x AUXADC
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*
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* @wm831x: Device to read from.
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* @input: AUXADC input to read.
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*/
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int wm831x_auxadc_read(struct wm831x *wm831x, enum wm831x_auxadc input)
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{
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return wm831x->auxadc_read(wm831x, input);
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}
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EXPORT_SYMBOL_GPL(wm831x_auxadc_read);
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/**
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* wm831x_auxadc_read_uv: Read a voltage from the WM831x AUXADC
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*
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* @wm831x: Device to read from.
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* @input: AUXADC input to read.
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*/
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int wm831x_auxadc_read_uv(struct wm831x *wm831x, enum wm831x_auxadc input)
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{
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int ret;
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ret = wm831x_auxadc_read(wm831x, input);
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if (ret < 0)
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return ret;
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ret *= 1465;
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return ret;
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}
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EXPORT_SYMBOL_GPL(wm831x_auxadc_read_uv);
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void wm831x_auxadc_init(struct wm831x *wm831x)
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{
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int ret;
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mutex_init(&wm831x->auxadc_lock);
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INIT_LIST_HEAD(&wm831x->auxadc_pending);
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if (wm831x->irq) {
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wm831x->auxadc_read = wm831x_auxadc_read_irq;
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ret = request_threaded_irq(wm831x_irq(wm831x,
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WM831X_IRQ_AUXADC_DATA),
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NULL, wm831x_auxadc_irq,
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IRQF_ONESHOT,
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"auxadc", wm831x);
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if (ret < 0) {
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dev_err(wm831x->dev, "AUXADC IRQ request failed: %d\n",
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ret);
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wm831x->auxadc_read = NULL;
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}
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}
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if (!wm831x->auxadc_read)
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wm831x->auxadc_read = wm831x_auxadc_read_polled;
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}
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