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alistair23-linux/drivers/mfd/arizona-core.c
Mark Brown 0848c94fb4 mfd: core: Push irqdomain mapping out into devices 
Currently the MFD core supports remapping MFD cell interrupts using an
irqdomain but only if the MFD is being instantiated using device tree
and only if the device tree bindings use the pattern of registering IPs
in the device tree with compatible properties.  This will be actively
harmful for drivers which support non-DT platforms and use this pattern
for their DT bindings as it will mean that the core will silently change
remapping behaviour and it is also limiting for drivers which don't do
DT with this particular pattern.  There is also a potential fragility if
there are interrupts not associated with MFD cells and all the cells are
omitted from the device tree for some reason.

Instead change the code to take an IRQ domain as an optional argument,
allowing drivers to take the decision about the parent domain for their
interrupts.  The one current user of this feature is ab8500-core, it has
the domain lookup pushed out into the driver.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2012-09-15 23:22:04 +02:00

567 lines
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/*
* Arizona core driver
*
* Copyright 2012 Wolfson Microelectronics plc
*
* Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/delay.h>
#include <linux/err.h>
#include <linux/gpio.h>
#include <linux/interrupt.h>
#include <linux/mfd/core.h>
#include <linux/module.h>
#include <linux/pm_runtime.h>
#include <linux/regmap.h>
#include <linux/regulator/consumer.h>
#include <linux/slab.h>
#include <linux/mfd/arizona/core.h>
#include <linux/mfd/arizona/registers.h>
#include "arizona.h"
static const char *wm5102_core_supplies[] = {
"AVDD",
"DBVDD1",
};
int arizona_clk32k_enable(struct arizona *arizona)
{
int ret = 0;
mutex_lock(&arizona->clk_lock);
arizona->clk32k_ref++;
if (arizona->clk32k_ref == 1)
ret = regmap_update_bits(arizona->regmap, ARIZONA_CLOCK_32K_1,
ARIZONA_CLK_32K_ENA,
ARIZONA_CLK_32K_ENA);
if (ret != 0)
arizona->clk32k_ref--;
mutex_unlock(&arizona->clk_lock);
return ret;
}
EXPORT_SYMBOL_GPL(arizona_clk32k_enable);
int arizona_clk32k_disable(struct arizona *arizona)
{
int ret = 0;
mutex_lock(&arizona->clk_lock);
BUG_ON(arizona->clk32k_ref <= 0);
arizona->clk32k_ref--;
if (arizona->clk32k_ref == 0)
regmap_update_bits(arizona->regmap, ARIZONA_CLOCK_32K_1,
ARIZONA_CLK_32K_ENA, 0);
mutex_unlock(&arizona->clk_lock);
return ret;
}
EXPORT_SYMBOL_GPL(arizona_clk32k_disable);
static irqreturn_t arizona_clkgen_err(int irq, void *data)
{
struct arizona *arizona = data;
dev_err(arizona->dev, "CLKGEN error\n");
return IRQ_HANDLED;
}
static irqreturn_t arizona_underclocked(int irq, void *data)
{
struct arizona *arizona = data;
unsigned int val;
int ret;
ret = regmap_read(arizona->regmap, ARIZONA_INTERRUPT_RAW_STATUS_8,
&val);
if (ret != 0) {
dev_err(arizona->dev, "Failed to read underclock status: %d\n",
ret);
return IRQ_NONE;
}
if (val & ARIZONA_AIF3_UNDERCLOCKED_STS)
dev_err(arizona->dev, "AIF3 underclocked\n");
if (val & ARIZONA_AIF3_UNDERCLOCKED_STS)
dev_err(arizona->dev, "AIF3 underclocked\n");
if (val & ARIZONA_AIF2_UNDERCLOCKED_STS)
dev_err(arizona->dev, "AIF1 underclocked\n");
if (val & ARIZONA_ISRC2_UNDERCLOCKED_STS)
dev_err(arizona->dev, "ISRC2 underclocked\n");
if (val & ARIZONA_ISRC1_UNDERCLOCKED_STS)
dev_err(arizona->dev, "ISRC1 underclocked\n");
if (val & ARIZONA_FX_UNDERCLOCKED_STS)
dev_err(arizona->dev, "FX underclocked\n");
if (val & ARIZONA_ASRC_UNDERCLOCKED_STS)
dev_err(arizona->dev, "ASRC underclocked\n");
if (val & ARIZONA_DAC_UNDERCLOCKED_STS)
dev_err(arizona->dev, "DAC underclocked\n");
if (val & ARIZONA_ADC_UNDERCLOCKED_STS)
dev_err(arizona->dev, "ADC underclocked\n");
if (val & ARIZONA_MIXER_UNDERCLOCKED_STS)
dev_err(arizona->dev, "Mixer underclocked\n");
return IRQ_HANDLED;
}
static irqreturn_t arizona_overclocked(int irq, void *data)
{
struct arizona *arizona = data;
unsigned int val[2];
int ret;
ret = regmap_bulk_read(arizona->regmap, ARIZONA_INTERRUPT_RAW_STATUS_6,
&val[0], 2);
if (ret != 0) {
dev_err(arizona->dev, "Failed to read overclock status: %d\n",
ret);
return IRQ_NONE;
}
if (val[0] & ARIZONA_PWM_OVERCLOCKED_STS)
dev_err(arizona->dev, "PWM overclocked\n");
if (val[0] & ARIZONA_FX_CORE_OVERCLOCKED_STS)
dev_err(arizona->dev, "FX core overclocked\n");
if (val[0] & ARIZONA_DAC_SYS_OVERCLOCKED_STS)
dev_err(arizona->dev, "DAC SYS overclocked\n");
if (val[0] & ARIZONA_DAC_WARP_OVERCLOCKED_STS)
dev_err(arizona->dev, "DAC WARP overclocked\n");
if (val[0] & ARIZONA_ADC_OVERCLOCKED_STS)
dev_err(arizona->dev, "ADC overclocked\n");
if (val[0] & ARIZONA_MIXER_OVERCLOCKED_STS)
dev_err(arizona->dev, "Mixer overclocked\n");
if (val[0] & ARIZONA_AIF3_SYNC_OVERCLOCKED_STS)
dev_err(arizona->dev, "AIF3 overclocked\n");
if (val[0] & ARIZONA_AIF2_SYNC_OVERCLOCKED_STS)
dev_err(arizona->dev, "AIF2 overclocked\n");
if (val[0] & ARIZONA_AIF1_SYNC_OVERCLOCKED_STS)
dev_err(arizona->dev, "AIF1 overclocked\n");
if (val[0] & ARIZONA_PAD_CTRL_OVERCLOCKED_STS)
dev_err(arizona->dev, "Pad control overclocked\n");
if (val[1] & ARIZONA_SLIMBUS_SUBSYS_OVERCLOCKED_STS)
dev_err(arizona->dev, "Slimbus subsystem overclocked\n");
if (val[1] & ARIZONA_SLIMBUS_ASYNC_OVERCLOCKED_STS)
dev_err(arizona->dev, "Slimbus async overclocked\n");
if (val[1] & ARIZONA_SLIMBUS_SYNC_OVERCLOCKED_STS)
dev_err(arizona->dev, "Slimbus sync overclocked\n");
if (val[1] & ARIZONA_ASRC_ASYNC_SYS_OVERCLOCKED_STS)
dev_err(arizona->dev, "ASRC async system overclocked\n");
if (val[1] & ARIZONA_ASRC_ASYNC_WARP_OVERCLOCKED_STS)
dev_err(arizona->dev, "ASRC async WARP overclocked\n");
if (val[1] & ARIZONA_ASRC_SYNC_SYS_OVERCLOCKED_STS)
dev_err(arizona->dev, "ASRC sync system overclocked\n");
if (val[1] & ARIZONA_ASRC_SYNC_WARP_OVERCLOCKED_STS)
dev_err(arizona->dev, "ASRC sync WARP overclocked\n");
if (val[1] & ARIZONA_ADSP2_1_OVERCLOCKED_STS)
dev_err(arizona->dev, "DSP1 overclocked\n");
if (val[1] & ARIZONA_ISRC2_OVERCLOCKED_STS)
dev_err(arizona->dev, "ISRC2 overclocked\n");
if (val[1] & ARIZONA_ISRC1_OVERCLOCKED_STS)
dev_err(arizona->dev, "ISRC1 overclocked\n");
return IRQ_HANDLED;
}
static int arizona_wait_for_boot(struct arizona *arizona)
{
unsigned int reg;
int ret, i;
/*
* We can't use an interrupt as we need to runtime resume to do so,
* we won't race with the interrupt handler as it'll be blocked on
* runtime resume.
*/
for (i = 0; i < 5; i++) {
msleep(1);
ret = regmap_read(arizona->regmap,
ARIZONA_INTERRUPT_RAW_STATUS_5, &reg);
if (ret != 0) {
dev_err(arizona->dev, "Failed to read boot state: %d\n",
ret);
continue;
}
if (reg & ARIZONA_BOOT_DONE_STS)
break;
}
if (reg & ARIZONA_BOOT_DONE_STS) {
regmap_write(arizona->regmap, ARIZONA_INTERRUPT_STATUS_5,
ARIZONA_BOOT_DONE_STS);
} else {
dev_err(arizona->dev, "Device boot timed out: %x\n", reg);
return -ETIMEDOUT;
}
pm_runtime_mark_last_busy(arizona->dev);
return 0;
}
#ifdef CONFIG_PM_RUNTIME
static int arizona_runtime_resume(struct device *dev)
{
struct arizona *arizona = dev_get_drvdata(dev);
int ret;
dev_dbg(arizona->dev, "Leaving AoD mode\n");
ret = regulator_enable(arizona->dcvdd);
if (ret != 0) {
dev_err(arizona->dev, "Failed to enable DCVDD: %d\n", ret);
return ret;
}
regcache_cache_only(arizona->regmap, false);
ret = arizona_wait_for_boot(arizona);
if (ret != 0) {
regulator_disable(arizona->dcvdd);
return ret;
}
regcache_sync(arizona->regmap);
return 0;
}
static int arizona_runtime_suspend(struct device *dev)
{
struct arizona *arizona = dev_get_drvdata(dev);
dev_dbg(arizona->dev, "Entering AoD mode\n");
regulator_disable(arizona->dcvdd);
regcache_cache_only(arizona->regmap, true);
regcache_mark_dirty(arizona->regmap);
return 0;
}
#endif
const struct dev_pm_ops arizona_pm_ops = {
SET_RUNTIME_PM_OPS(arizona_runtime_suspend,
arizona_runtime_resume,
NULL)
};
EXPORT_SYMBOL_GPL(arizona_pm_ops);
static struct mfd_cell early_devs[] = {
{ .name = "arizona-ldo1" },
};
static struct mfd_cell wm5102_devs[] = {
{ .name = "arizona-extcon" },
{ .name = "arizona-gpio" },
{ .name = "arizona-micsupp" },
{ .name = "arizona-pwm" },
{ .name = "wm5102-codec" },
};
static struct mfd_cell wm5110_devs[] = {
{ .name = "arizona-extcon" },
{ .name = "arizona-gpio" },
{ .name = "arizona-micsupp" },
{ .name = "arizona-pwm" },
{ .name = "wm5110-codec" },
};
int __devinit arizona_dev_init(struct arizona *arizona)
{
struct device *dev = arizona->dev;
const char *type_name;
unsigned int reg, val;
int ret, i;
dev_set_drvdata(arizona->dev, arizona);
mutex_init(&arizona->clk_lock);
if (dev_get_platdata(arizona->dev))
memcpy(&arizona->pdata, dev_get_platdata(arizona->dev),
sizeof(arizona->pdata));
regcache_cache_only(arizona->regmap, true);
switch (arizona->type) {
case WM5102:
case WM5110:
for (i = 0; i < ARRAY_SIZE(wm5102_core_supplies); i++)
arizona->core_supplies[i].supply
= wm5102_core_supplies[i];
arizona->num_core_supplies = ARRAY_SIZE(wm5102_core_supplies);
break;
default:
dev_err(arizona->dev, "Unknown device type %d\n",
arizona->type);
return -EINVAL;
}
ret = mfd_add_devices(arizona->dev, -1, early_devs,
ARRAY_SIZE(early_devs), NULL, 0, NULL);
if (ret != 0) {
dev_err(dev, "Failed to add early children: %d\n", ret);
return ret;
}
ret = devm_regulator_bulk_get(dev, arizona->num_core_supplies,
arizona->core_supplies);
if (ret != 0) {
dev_err(dev, "Failed to request core supplies: %d\n",
ret);
goto err_early;
}
arizona->dcvdd = devm_regulator_get(arizona->dev, "DCVDD");
if (IS_ERR(arizona->dcvdd)) {
ret = PTR_ERR(arizona->dcvdd);
dev_err(dev, "Failed to request DCVDD: %d\n", ret);
goto err_early;
}
ret = regulator_bulk_enable(arizona->num_core_supplies,
arizona->core_supplies);
if (ret != 0) {
dev_err(dev, "Failed to enable core supplies: %d\n",
ret);
goto err_early;
}
ret = regulator_enable(arizona->dcvdd);
if (ret != 0) {
dev_err(dev, "Failed to enable DCVDD: %d\n", ret);
goto err_enable;
}
if (arizona->pdata.reset) {
/* Start out with /RESET low to put the chip into reset */
ret = gpio_request_one(arizona->pdata.reset,
GPIOF_DIR_OUT | GPIOF_INIT_LOW,
"arizona /RESET");
if (ret != 0) {
dev_err(dev, "Failed to request /RESET: %d\n", ret);
goto err_dcvdd;
}
gpio_set_value_cansleep(arizona->pdata.reset, 1);
}
regcache_cache_only(arizona->regmap, false);
ret = regmap_read(arizona->regmap, ARIZONA_SOFTWARE_RESET, &reg);
if (ret != 0) {
dev_err(dev, "Failed to read ID register: %d\n", ret);
goto err_reset;
}
ret = regmap_read(arizona->regmap, ARIZONA_DEVICE_REVISION,
&arizona->rev);
if (ret != 0) {
dev_err(dev, "Failed to read revision register: %d\n", ret);
goto err_reset;
}
arizona->rev &= ARIZONA_DEVICE_REVISION_MASK;
switch (reg) {
#ifdef CONFIG_MFD_WM5102
case 0x5102:
type_name = "WM5102";
if (arizona->type != WM5102) {
dev_err(arizona->dev, "WM5102 registered as %d\n",
arizona->type);
arizona->type = WM5102;
}
ret = wm5102_patch(arizona);
break;
#endif
#ifdef CONFIG_MFD_WM5110
case 0x5110:
type_name = "WM5110";
if (arizona->type != WM5110) {
dev_err(arizona->dev, "WM5110 registered as %d\n",
arizona->type);
arizona->type = WM5110;
}
ret = wm5110_patch(arizona);
break;
#endif
default:
dev_err(arizona->dev, "Unknown device ID %x\n", reg);
goto err_reset;
}
dev_info(dev, "%s revision %c\n", type_name, arizona->rev + 'A');
if (ret != 0)
dev_err(arizona->dev, "Failed to apply patch: %d\n", ret);
/* If we have a /RESET GPIO we'll already be reset */
if (!arizona->pdata.reset) {
ret = regmap_write(arizona->regmap, ARIZONA_SOFTWARE_RESET, 0);
if (ret != 0) {
dev_err(dev, "Failed to reset device: %d\n", ret);
goto err_reset;
}
}
ret = arizona_wait_for_boot(arizona);
if (ret != 0) {
dev_err(arizona->dev, "Device failed initial boot: %d\n", ret);
goto err_reset;
}
for (i = 0; i < ARRAY_SIZE(arizona->pdata.gpio_defaults); i++) {
if (!arizona->pdata.gpio_defaults[i])
continue;
regmap_write(arizona->regmap, ARIZONA_GPIO1_CTRL + i,
arizona->pdata.gpio_defaults[i]);
}
pm_runtime_set_autosuspend_delay(arizona->dev, 100);
pm_runtime_use_autosuspend(arizona->dev);
pm_runtime_enable(arizona->dev);
/* Chip default */
if (!arizona->pdata.clk32k_src)
arizona->pdata.clk32k_src = ARIZONA_32KZ_MCLK2;
switch (arizona->pdata.clk32k_src) {
case ARIZONA_32KZ_MCLK1:
case ARIZONA_32KZ_MCLK2:
regmap_update_bits(arizona->regmap, ARIZONA_CLOCK_32K_1,
ARIZONA_CLK_32K_SRC_MASK,
arizona->pdata.clk32k_src - 1);
break;
case ARIZONA_32KZ_NONE:
regmap_update_bits(arizona->regmap, ARIZONA_CLOCK_32K_1,
ARIZONA_CLK_32K_SRC_MASK, 2);
break;
default:
dev_err(arizona->dev, "Invalid 32kHz clock source: %d\n",
arizona->pdata.clk32k_src);
ret = -EINVAL;
goto err_reset;
}
for (i = 0; i < ARIZONA_MAX_INPUT; i++) {
/* Default for both is 0 so noop with defaults */
val = arizona->pdata.dmic_ref[i]
<< ARIZONA_IN1_DMIC_SUP_SHIFT;
val |= arizona->pdata.inmode[i] << ARIZONA_IN1_MODE_SHIFT;
regmap_update_bits(arizona->regmap,
ARIZONA_IN1L_CONTROL + (i * 8),
ARIZONA_IN1_DMIC_SUP_MASK |
ARIZONA_IN1_MODE_MASK, val);
}
for (i = 0; i < ARIZONA_MAX_OUTPUT; i++) {
/* Default is 0 so noop with defaults */
if (arizona->pdata.out_mono[i])
val = ARIZONA_OUT1_MONO;
else
val = 0;
regmap_update_bits(arizona->regmap,
ARIZONA_OUTPUT_PATH_CONFIG_1L + (i * 8),
ARIZONA_OUT1_MONO, val);
}
for (i = 0; i < ARIZONA_MAX_PDM_SPK; i++) {
if (arizona->pdata.spk_mute[i])
regmap_update_bits(arizona->regmap,
ARIZONA_PDM_SPK1_CTRL_1 + (i * 2),
ARIZONA_SPK1_MUTE_ENDIAN_MASK |
ARIZONA_SPK1_MUTE_SEQ1_MASK,
arizona->pdata.spk_mute[i]);
if (arizona->pdata.spk_fmt[i])
regmap_update_bits(arizona->regmap,
ARIZONA_PDM_SPK1_CTRL_2 + (i * 2),
ARIZONA_SPK1_FMT_MASK,
arizona->pdata.spk_fmt[i]);
}
/* Set up for interrupts */
ret = arizona_irq_init(arizona);
if (ret != 0)
goto err_reset;
arizona_request_irq(arizona, ARIZONA_IRQ_CLKGEN_ERR, "CLKGEN error",
arizona_clkgen_err, arizona);
arizona_request_irq(arizona, ARIZONA_IRQ_OVERCLOCKED, "Overclocked",
arizona_overclocked, arizona);
arizona_request_irq(arizona, ARIZONA_IRQ_UNDERCLOCKED, "Underclocked",
arizona_underclocked, arizona);
switch (arizona->type) {
case WM5102:
ret = mfd_add_devices(arizona->dev, -1, wm5102_devs,
ARRAY_SIZE(wm5102_devs), NULL, 0, NULL);
break;
case WM5110:
ret = mfd_add_devices(arizona->dev, -1, wm5110_devs,
ARRAY_SIZE(wm5102_devs), NULL, 0, NULL);
break;
}
if (ret != 0) {
dev_err(arizona->dev, "Failed to add subdevices: %d\n", ret);
goto err_irq;
}
#ifdef CONFIG_PM_RUNTIME
regulator_disable(arizona->dcvdd);
#endif
return 0;
err_irq:
arizona_irq_exit(arizona);
err_reset:
if (arizona->pdata.reset) {
gpio_set_value_cansleep(arizona->pdata.reset, 1);
gpio_free(arizona->pdata.reset);
}
err_dcvdd:
regulator_disable(arizona->dcvdd);
err_enable:
regulator_bulk_disable(arizona->num_core_supplies,
arizona->core_supplies);
err_early:
mfd_remove_devices(dev);
return ret;
}
EXPORT_SYMBOL_GPL(arizona_dev_init);
int __devexit arizona_dev_exit(struct arizona *arizona)
{
mfd_remove_devices(arizona->dev);
arizona_free_irq(arizona, ARIZONA_IRQ_UNDERCLOCKED, arizona);
arizona_free_irq(arizona, ARIZONA_IRQ_OVERCLOCKED, arizona);
arizona_free_irq(arizona, ARIZONA_IRQ_CLKGEN_ERR, arizona);
pm_runtime_disable(arizona->dev);
arizona_irq_exit(arizona);
return 0;
}
EXPORT_SYMBOL_GPL(arizona_dev_exit);
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