dc54392921
This code has been working since 2012, as limiting the time between
1ms and 3ms is unlikely to do any harm.
Soothes checkpatch warning:
WARNING: msleep < 20ms can sleep for up to 20ms;
see Documentation/timers/timers-howto.txt
#161: FILE: drivers/mfd/88pm805.c:161:
+ msleep(1);
Signed-off-by: Lee Jones <lee.jones@linaro.org>
292 lines
6.4 KiB
C
292 lines
6.4 KiB
C
/*
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* Base driver for Marvell 88PM805
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*
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* Copyright (C) 2012 Marvell International Ltd.
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* Haojian Zhuang <haojian.zhuang@marvell.com>
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* Joseph(Yossi) Hanin <yhanin@marvell.com>
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* Qiao Zhou <zhouqiao@marvell.com>
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*
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* This file is subject to the terms and conditions of the GNU General
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* Public License. See the file "COPYING" in the main directory of this
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* archive for more details.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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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/i2c.h>
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#include <linux/irq.h>
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#include <linux/mfd/core.h>
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#include <linux/mfd/88pm80x.h>
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#include <linux/slab.h>
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#include <linux/delay.h>
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static const struct i2c_device_id pm80x_id_table[] = {
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{"88PM805", 0},
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{} /* NULL terminated */
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};
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MODULE_DEVICE_TABLE(i2c, pm80x_id_table);
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/* Interrupt Number in 88PM805 */
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enum {
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PM805_IRQ_LDO_OFF, /*0 */
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PM805_IRQ_SRC_DPLL_LOCK, /*1 */
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PM805_IRQ_CLIP_FAULT,
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PM805_IRQ_MIC_CONFLICT,
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PM805_IRQ_HP2_SHRT,
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PM805_IRQ_HP1_SHRT, /*5 */
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PM805_IRQ_FINE_PLL_FAULT,
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PM805_IRQ_RAW_PLL_FAULT,
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PM805_IRQ_VOLP_BTN_DET,
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PM805_IRQ_VOLM_BTN_DET,
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PM805_IRQ_SHRT_BTN_DET, /*10 */
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PM805_IRQ_MIC_DET, /*11 */
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PM805_MAX_IRQ,
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};
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static struct resource codec_resources[] = {
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{
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/* Headset microphone insertion or removal */
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.name = "micin",
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.start = PM805_IRQ_MIC_DET,
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.end = PM805_IRQ_MIC_DET,
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.flags = IORESOURCE_IRQ,
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},
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{
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/* Audio short HP1 */
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.name = "audio-short1",
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.start = PM805_IRQ_HP1_SHRT,
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.end = PM805_IRQ_HP1_SHRT,
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.flags = IORESOURCE_IRQ,
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},
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{
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/* Audio short HP2 */
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.name = "audio-short2",
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.start = PM805_IRQ_HP2_SHRT,
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.end = PM805_IRQ_HP2_SHRT,
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.flags = IORESOURCE_IRQ,
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},
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};
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static const struct mfd_cell codec_devs[] = {
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{
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.name = "88pm80x-codec",
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.num_resources = ARRAY_SIZE(codec_resources),
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.resources = &codec_resources[0],
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.id = -1,
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},
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};
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static struct regmap_irq pm805_irqs[] = {
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/* INT0 */
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[PM805_IRQ_LDO_OFF] = {
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.mask = PM805_INT1_HP1_SHRT,
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},
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[PM805_IRQ_SRC_DPLL_LOCK] = {
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.mask = PM805_INT1_HP2_SHRT,
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},
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[PM805_IRQ_CLIP_FAULT] = {
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.mask = PM805_INT1_MIC_CONFLICT,
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},
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[PM805_IRQ_MIC_CONFLICT] = {
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.mask = PM805_INT1_CLIP_FAULT,
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},
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[PM805_IRQ_HP2_SHRT] = {
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.mask = PM805_INT1_LDO_OFF,
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},
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[PM805_IRQ_HP1_SHRT] = {
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.mask = PM805_INT1_SRC_DPLL_LOCK,
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},
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/* INT1 */
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[PM805_IRQ_FINE_PLL_FAULT] = {
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.reg_offset = 1,
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.mask = PM805_INT2_MIC_DET,
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},
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[PM805_IRQ_RAW_PLL_FAULT] = {
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.reg_offset = 1,
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.mask = PM805_INT2_SHRT_BTN_DET,
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},
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[PM805_IRQ_VOLP_BTN_DET] = {
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.reg_offset = 1,
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.mask = PM805_INT2_VOLM_BTN_DET,
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},
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[PM805_IRQ_VOLM_BTN_DET] = {
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.reg_offset = 1,
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.mask = PM805_INT2_VOLP_BTN_DET,
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},
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[PM805_IRQ_SHRT_BTN_DET] = {
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.reg_offset = 1,
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.mask = PM805_INT2_RAW_PLL_FAULT,
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},
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[PM805_IRQ_MIC_DET] = {
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.reg_offset = 1,
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.mask = PM805_INT2_FINE_PLL_FAULT,
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},
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};
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static int device_irq_init_805(struct pm80x_chip *chip)
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{
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struct regmap *map = chip->regmap;
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unsigned long flags = IRQF_ONESHOT;
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int data, mask, ret = -EINVAL;
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if (!map || !chip->irq) {
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dev_err(chip->dev, "incorrect parameters\n");
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return -EINVAL;
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}
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/*
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* irq_mode defines the way of clearing interrupt. it's read-clear by
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* default.
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*/
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mask =
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PM805_STATUS0_INT_CLEAR | PM805_STATUS0_INV_INT |
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PM800_STATUS0_INT_MASK;
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data = PM805_STATUS0_INT_CLEAR;
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ret = regmap_update_bits(map, PM805_INT_STATUS0, mask, data);
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/*
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* PM805_INT_STATUS is under 32K clock domain, so need to
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* add proper delay before the next I2C register access.
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*/
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usleep_range(1000, 3000);
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if (ret < 0)
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goto out;
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ret =
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regmap_add_irq_chip(chip->regmap, chip->irq, flags, -1,
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chip->regmap_irq_chip, &chip->irq_data);
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out:
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return ret;
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}
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static void device_irq_exit_805(struct pm80x_chip *chip)
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{
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regmap_del_irq_chip(chip->irq, chip->irq_data);
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}
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static struct regmap_irq_chip pm805_irq_chip = {
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.name = "88pm805",
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.irqs = pm805_irqs,
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.num_irqs = ARRAY_SIZE(pm805_irqs),
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.num_regs = 2,
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.status_base = PM805_INT_STATUS1,
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.mask_base = PM805_INT_MASK1,
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.ack_base = PM805_INT_STATUS1,
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};
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static int device_805_init(struct pm80x_chip *chip)
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{
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int ret = 0;
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struct regmap *map = chip->regmap;
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if (!map) {
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dev_err(chip->dev, "regmap is invalid\n");
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return -EINVAL;
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}
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chip->regmap_irq_chip = &pm805_irq_chip;
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ret = device_irq_init_805(chip);
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if (ret < 0) {
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dev_err(chip->dev, "Failed to init pm805 irq!\n");
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goto out_irq_init;
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}
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ret = mfd_add_devices(chip->dev, 0, &codec_devs[0],
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ARRAY_SIZE(codec_devs), &codec_resources[0], 0,
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NULL);
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if (ret < 0) {
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dev_err(chip->dev, "Failed to add codec subdev\n");
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goto out_codec;
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} else
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dev_info(chip->dev, "[%s]:Added mfd codec_devs\n", __func__);
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return 0;
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out_codec:
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device_irq_exit_805(chip);
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out_irq_init:
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return ret;
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}
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static int pm805_probe(struct i2c_client *client,
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const struct i2c_device_id *id)
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{
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int ret = 0;
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struct pm80x_chip *chip;
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struct pm80x_platform_data *pdata = dev_get_platdata(&client->dev);
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ret = pm80x_init(client);
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if (ret) {
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dev_err(&client->dev, "pm805_init fail!\n");
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goto out_init;
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}
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chip = i2c_get_clientdata(client);
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ret = device_805_init(chip);
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if (ret) {
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dev_err(chip->dev, "Failed to initialize 88pm805 devices\n");
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goto err_805_init;
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}
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if (pdata && pdata->plat_config)
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pdata->plat_config(chip, pdata);
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err_805_init:
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pm80x_deinit();
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out_init:
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return ret;
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}
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static int pm805_remove(struct i2c_client *client)
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{
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struct pm80x_chip *chip = i2c_get_clientdata(client);
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mfd_remove_devices(chip->dev);
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device_irq_exit_805(chip);
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pm80x_deinit();
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return 0;
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}
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static struct i2c_driver pm805_driver = {
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.driver = {
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.name = "88PM805",
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.owner = THIS_MODULE,
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.pm = &pm80x_pm_ops,
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},
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.probe = pm805_probe,
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.remove = pm805_remove,
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.id_table = pm80x_id_table,
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};
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static int __init pm805_i2c_init(void)
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{
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return i2c_add_driver(&pm805_driver);
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}
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subsys_initcall(pm805_i2c_init);
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static void __exit pm805_i2c_exit(void)
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{
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i2c_del_driver(&pm805_driver);
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}
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module_exit(pm805_i2c_exit);
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MODULE_DESCRIPTION("PMIC Driver for Marvell 88PM805");
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MODULE_AUTHOR("Qiao Zhou <zhouqiao@marvell.com>");
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MODULE_LICENSE("GPL");
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