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linux/drivers/mfd/palmas.c
Laxman Dewangan c4fbec3c6b mfd: palmas: Initialise client->of_node for dummy created client 
Palmas device have three different i2c addresses. The device creates
the two new dummy i2c clients for accessing the register by using
primary client adapter. This new dummy i2c client have their of_node
as NULL.

The dummy i2c client is used for registering interrupt and on this,
it creates irq domain handle. This created irq domain handle has
their of_node as NULL.

Now when any child of this device is registered through the DT as
follows:
         palmas: tps65913@58 {
         	::::::::::::::::::

         	#interrupt-cells = <2>;
                interrupt-controller;

                palmas_rtc {
                       compatible = "ti,palmas-rtc";
                       interrupt-parent = <&palmas>;
                       interrupts = <8 0>;
                };
                ::::::::::;;;
         };

And child driver (palam-rtc in this case) get their irq number as
	irq = platform_get_irq(pdev, 0);

The returned irq number is error in this case. The reason is that
the created irq_domain handle for the palmas interrupt does not have
valid node and so matching of node fails with palmas node.

Hence initialising the newly dummy created client->of_node with the
primary clients of_node so that irq_domain handle have proper of_node
for matching.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2013-04-08 18:13:20 +02:00

568 lines
14 KiB
C
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/*
* TI Palmas MFD Driver
*
* Copyright 2011-2012 Texas Instruments Inc.
*
* Author: Graeme Gregory <gg@slimlogic.co.uk>
*
* 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.
*
*/
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/i2c.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/regmap.h>
#include <linux/err.h>
#include <linux/mfd/core.h>
#include <linux/mfd/palmas.h>
#include <linux/of_platform.h>
enum palmas_ids {
PALMAS_PMIC_ID,
PALMAS_GPIO_ID,
PALMAS_LEDS_ID,
PALMAS_WDT_ID,
PALMAS_RTC_ID,
PALMAS_PWRBUTTON_ID,
PALMAS_GPADC_ID,
PALMAS_RESOURCE_ID,
PALMAS_CLK_ID,
PALMAS_PWM_ID,
PALMAS_USB_ID,
};
static struct resource palmas_rtc_resources[] = {
{
.start = PALMAS_RTC_ALARM_IRQ,
.end = PALMAS_RTC_ALARM_IRQ,
.flags = IORESOURCE_IRQ,
},
};
static const struct mfd_cell palmas_children[] = {
{
.name = "palmas-pmic",
.id = PALMAS_PMIC_ID,
},
{
.name = "palmas-gpio",
.id = PALMAS_GPIO_ID,
},
{
.name = "palmas-leds",
.id = PALMAS_LEDS_ID,
},
{
.name = "palmas-wdt",
.id = PALMAS_WDT_ID,
},
{
.name = "palmas-rtc",
.id = PALMAS_RTC_ID,
.resources = &palmas_rtc_resources[0],
.num_resources = ARRAY_SIZE(palmas_rtc_resources),
},
{
.name = "palmas-pwrbutton",
.id = PALMAS_PWRBUTTON_ID,
},
{
.name = "palmas-gpadc",
.id = PALMAS_GPADC_ID,
},
{
.name = "palmas-resource",
.id = PALMAS_RESOURCE_ID,
},
{
.name = "palmas-clk",
.id = PALMAS_CLK_ID,
},
{
.name = "palmas-pwm",
.id = PALMAS_PWM_ID,
},
{
.name = "palmas-usb",
.id = PALMAS_USB_ID,
}
};
static const struct regmap_config palmas_regmap_config[PALMAS_NUM_CLIENTS] = {
{
.reg_bits = 8,
.val_bits = 8,
.max_register = PALMAS_BASE_TO_REG(PALMAS_PU_PD_OD_BASE,
PALMAS_PRIMARY_SECONDARY_PAD3),
},
{
.reg_bits = 8,
.val_bits = 8,
.max_register = PALMAS_BASE_TO_REG(PALMAS_GPADC_BASE,
PALMAS_GPADC_SMPS_VSEL_MONITORING),
},
{
.reg_bits = 8,
.val_bits = 8,
.max_register = PALMAS_BASE_TO_REG(PALMAS_TRIM_GPADC_BASE,
PALMAS_GPADC_TRIM16),
},
};
static const struct regmap_irq palmas_irqs[] = {
/* INT1 IRQs */
[PALMAS_CHARG_DET_N_VBUS_OVV_IRQ] = {
.mask = PALMAS_INT1_STATUS_CHARG_DET_N_VBUS_OVV,
},
[PALMAS_PWRON_IRQ] = {
.mask = PALMAS_INT1_STATUS_PWRON,
},
[PALMAS_LONG_PRESS_KEY_IRQ] = {
.mask = PALMAS_INT1_STATUS_LONG_PRESS_KEY,
},
[PALMAS_RPWRON_IRQ] = {
.mask = PALMAS_INT1_STATUS_RPWRON,
},
[PALMAS_PWRDOWN_IRQ] = {
.mask = PALMAS_INT1_STATUS_PWRDOWN,
},
[PALMAS_HOTDIE_IRQ] = {
.mask = PALMAS_INT1_STATUS_HOTDIE,
},
[PALMAS_VSYS_MON_IRQ] = {
.mask = PALMAS_INT1_STATUS_VSYS_MON,
},
[PALMAS_VBAT_MON_IRQ] = {
.mask = PALMAS_INT1_STATUS_VBAT_MON,
},
/* INT2 IRQs*/
[PALMAS_RTC_ALARM_IRQ] = {
.mask = PALMAS_INT2_STATUS_RTC_ALARM,
.reg_offset = 1,
},
[PALMAS_RTC_TIMER_IRQ] = {
.mask = PALMAS_INT2_STATUS_RTC_TIMER,
.reg_offset = 1,
},
[PALMAS_WDT_IRQ] = {
.mask = PALMAS_INT2_STATUS_WDT,
.reg_offset = 1,
},
[PALMAS_BATREMOVAL_IRQ] = {
.mask = PALMAS_INT2_STATUS_BATREMOVAL,
.reg_offset = 1,
},
[PALMAS_RESET_IN_IRQ] = {
.mask = PALMAS_INT2_STATUS_RESET_IN,
.reg_offset = 1,
},
[PALMAS_FBI_BB_IRQ] = {
.mask = PALMAS_INT2_STATUS_FBI_BB,
.reg_offset = 1,
},
[PALMAS_SHORT_IRQ] = {
.mask = PALMAS_INT2_STATUS_SHORT,
.reg_offset = 1,
},
[PALMAS_VAC_ACOK_IRQ] = {
.mask = PALMAS_INT2_STATUS_VAC_ACOK,
.reg_offset = 1,
},
/* INT3 IRQs */
[PALMAS_GPADC_AUTO_0_IRQ] = {
.mask = PALMAS_INT3_STATUS_GPADC_AUTO_0,
.reg_offset = 2,
},
[PALMAS_GPADC_AUTO_1_IRQ] = {
.mask = PALMAS_INT3_STATUS_GPADC_AUTO_1,
.reg_offset = 2,
},
[PALMAS_GPADC_EOC_SW_IRQ] = {
.mask = PALMAS_INT3_STATUS_GPADC_EOC_SW,
.reg_offset = 2,
},
[PALMAS_GPADC_EOC_RT_IRQ] = {
.mask = PALMAS_INT3_STATUS_GPADC_EOC_RT,
.reg_offset = 2,
},
[PALMAS_ID_OTG_IRQ] = {
.mask = PALMAS_INT3_STATUS_ID_OTG,
.reg_offset = 2,
},
[PALMAS_ID_IRQ] = {
.mask = PALMAS_INT3_STATUS_ID,
.reg_offset = 2,
},
[PALMAS_VBUS_OTG_IRQ] = {
.mask = PALMAS_INT3_STATUS_VBUS_OTG,
.reg_offset = 2,
},
[PALMAS_VBUS_IRQ] = {
.mask = PALMAS_INT3_STATUS_VBUS,
.reg_offset = 2,
},
/* INT4 IRQs */
[PALMAS_GPIO_0_IRQ] = {
.mask = PALMAS_INT4_STATUS_GPIO_0,
.reg_offset = 3,
},
[PALMAS_GPIO_1_IRQ] = {
.mask = PALMAS_INT4_STATUS_GPIO_1,
.reg_offset = 3,
},
[PALMAS_GPIO_2_IRQ] = {
.mask = PALMAS_INT4_STATUS_GPIO_2,
.reg_offset = 3,
},
[PALMAS_GPIO_3_IRQ] = {
.mask = PALMAS_INT4_STATUS_GPIO_3,
.reg_offset = 3,
},
[PALMAS_GPIO_4_IRQ] = {
.mask = PALMAS_INT4_STATUS_GPIO_4,
.reg_offset = 3,
},
[PALMAS_GPIO_5_IRQ] = {
.mask = PALMAS_INT4_STATUS_GPIO_5,
.reg_offset = 3,
},
[PALMAS_GPIO_6_IRQ] = {
.mask = PALMAS_INT4_STATUS_GPIO_6,
.reg_offset = 3,
},
[PALMAS_GPIO_7_IRQ] = {
.mask = PALMAS_INT4_STATUS_GPIO_7,
.reg_offset = 3,
},
};
static struct regmap_irq_chip palmas_irq_chip = {
.name = "palmas",
.irqs = palmas_irqs,
.num_irqs = ARRAY_SIZE(palmas_irqs),
.num_regs = 4,
.irq_reg_stride = 5,
.status_base = PALMAS_BASE_TO_REG(PALMAS_INTERRUPT_BASE,
PALMAS_INT1_STATUS),
.mask_base = PALMAS_BASE_TO_REG(PALMAS_INTERRUPT_BASE,
PALMAS_INT1_MASK),
};
static int palmas_set_pdata_irq_flag(struct i2c_client *i2c,
struct palmas_platform_data *pdata)
{
struct irq_data *irq_data = irq_get_irq_data(i2c->irq);
if (!irq_data) {
dev_err(&i2c->dev, "Invalid IRQ: %d\n", i2c->irq);
return -EINVAL;
}
pdata->irq_flags = irqd_get_trigger_type(irq_data);
dev_info(&i2c->dev, "Irq flag is 0x%08x\n", pdata->irq_flags);
return 0;
}
static void palmas_dt_to_pdata(struct i2c_client *i2c,
struct palmas_platform_data *pdata)
{
struct device_node *node = i2c->dev.of_node;
int ret;
u32 prop;
ret = of_property_read_u32(node, "ti,mux-pad1", &prop);
if (!ret) {
pdata->mux_from_pdata = 1;
pdata->pad1 = prop;
}
ret = of_property_read_u32(node, "ti,mux-pad2", &prop);
if (!ret) {
pdata->mux_from_pdata = 1;
pdata->pad2 = prop;
}
/* The default for this register is all masked */
ret = of_property_read_u32(node, "ti,power-ctrl", &prop);
if (!ret)
pdata->power_ctrl = prop;
else
pdata->power_ctrl = PALMAS_POWER_CTRL_NSLEEP_MASK |
PALMAS_POWER_CTRL_ENABLE1_MASK |
PALMAS_POWER_CTRL_ENABLE2_MASK;
if (i2c->irq)
palmas_set_pdata_irq_flag(i2c, pdata);
}
static int palmas_i2c_probe(struct i2c_client *i2c,
const struct i2c_device_id *id)
{
struct palmas *palmas;
struct palmas_platform_data *pdata;
struct device_node *node = i2c->dev.of_node;
int ret = 0, i;
unsigned int reg, addr;
int slave;
struct mfd_cell *children;
pdata = dev_get_platdata(&i2c->dev);
if (node && !pdata) {
pdata = devm_kzalloc(&i2c->dev, sizeof(*pdata), GFP_KERNEL);
if (!pdata)
return -ENOMEM;
palmas_dt_to_pdata(i2c, pdata);
}
if (!pdata)
return -EINVAL;
palmas = devm_kzalloc(&i2c->dev, sizeof(struct palmas), GFP_KERNEL);
if (palmas == NULL)
return -ENOMEM;
i2c_set_clientdata(i2c, palmas);
palmas->dev = &i2c->dev;
palmas->id = id->driver_data;
palmas->irq = i2c->irq;
for (i = 0; i < PALMAS_NUM_CLIENTS; i++) {
if (i == 0)
palmas->i2c_clients[i] = i2c;
else {
palmas->i2c_clients[i] =
i2c_new_dummy(i2c->adapter,
i2c->addr + i);
if (!palmas->i2c_clients[i]) {
dev_err(palmas->dev,
"can't attach client %d\n", i);
ret = -ENOMEM;
goto err;
}
palmas->i2c_clients[i]->dev.of_node = of_node_get(node);
}
palmas->regmap[i] = devm_regmap_init_i2c(palmas->i2c_clients[i],
&palmas_regmap_config[i]);
if (IS_ERR(palmas->regmap[i])) {
ret = PTR_ERR(palmas->regmap[i]);
dev_err(palmas->dev,
"Failed to allocate regmap %d, err: %d\n",
i, ret);
goto err;
}
}
/* Change interrupt line output polarity */
if (pdata->irq_flags & IRQ_TYPE_LEVEL_HIGH)
reg = PALMAS_POLARITY_CTRL_INT_POLARITY;
else
reg = 0;
ret = palmas_update_bits(palmas, PALMAS_PU_PD_OD_BASE,
PALMAS_POLARITY_CTRL, PALMAS_POLARITY_CTRL_INT_POLARITY,
reg);
if (ret < 0) {
dev_err(palmas->dev, "POLARITY_CTRL updat failed: %d\n", ret);
goto err;
}
/* Change IRQ into clear on read mode for efficiency */
slave = PALMAS_BASE_TO_SLAVE(PALMAS_INTERRUPT_BASE);
addr = PALMAS_BASE_TO_REG(PALMAS_INTERRUPT_BASE, PALMAS_INT_CTRL);
reg = PALMAS_INT_CTRL_INT_CLEAR;
regmap_write(palmas->regmap[slave], addr, reg);
ret = regmap_add_irq_chip(palmas->regmap[slave], palmas->irq,
IRQF_ONESHOT | pdata->irq_flags, 0, &palmas_irq_chip,
&palmas->irq_data);
if (ret < 0)
goto err;
slave = PALMAS_BASE_TO_SLAVE(PALMAS_PU_PD_OD_BASE);
addr = PALMAS_BASE_TO_REG(PALMAS_PU_PD_OD_BASE,
PALMAS_PRIMARY_SECONDARY_PAD1);
if (pdata->mux_from_pdata) {
reg = pdata->pad1;
ret = regmap_write(palmas->regmap[slave], addr, reg);
if (ret)
goto err_irq;
} else {
ret = regmap_read(palmas->regmap[slave], addr, &reg);
if (ret)
goto err_irq;
}
if (!(reg & PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_0))
palmas->gpio_muxed |= PALMAS_GPIO_0_MUXED;
if (!(reg & PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_1_MASK))
palmas->gpio_muxed |= PALMAS_GPIO_1_MUXED;
else if ((reg & PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_1_MASK) ==
(2 << PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_1_SHIFT))
palmas->led_muxed |= PALMAS_LED1_MUXED;
else if ((reg & PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_1_MASK) ==
(3 << PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_1_SHIFT))
palmas->pwm_muxed |= PALMAS_PWM1_MUXED;
if (!(reg & PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_2_MASK))
palmas->gpio_muxed |= PALMAS_GPIO_2_MUXED;
else if ((reg & PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_2_MASK) ==
(2 << PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_2_SHIFT))
palmas->led_muxed |= PALMAS_LED2_MUXED;
else if ((reg & PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_2_MASK) ==
(3 << PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_2_SHIFT))
palmas->pwm_muxed |= PALMAS_PWM2_MUXED;
if (!(reg & PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_3))
palmas->gpio_muxed |= PALMAS_GPIO_3_MUXED;
addr = PALMAS_BASE_TO_REG(PALMAS_PU_PD_OD_BASE,
PALMAS_PRIMARY_SECONDARY_PAD2);
if (pdata->mux_from_pdata) {
reg = pdata->pad2;
ret = regmap_write(palmas->regmap[slave], addr, reg);
if (ret)
goto err_irq;
} else {
ret = regmap_read(palmas->regmap[slave], addr, &reg);
if (ret)
goto err_irq;
}
if (!(reg & PALMAS_PRIMARY_SECONDARY_PAD2_GPIO_4))
palmas->gpio_muxed |= PALMAS_GPIO_4_MUXED;
if (!(reg & PALMAS_PRIMARY_SECONDARY_PAD2_GPIO_5_MASK))
palmas->gpio_muxed |= PALMAS_GPIO_5_MUXED;
if (!(reg & PALMAS_PRIMARY_SECONDARY_PAD2_GPIO_6))
palmas->gpio_muxed |= PALMAS_GPIO_6_MUXED;
if (!(reg & PALMAS_PRIMARY_SECONDARY_PAD2_GPIO_7_MASK))
palmas->gpio_muxed |= PALMAS_GPIO_7_MUXED;
dev_info(palmas->dev, "Muxing GPIO %x, PWM %x, LED %x\n",
palmas->gpio_muxed, palmas->pwm_muxed,
palmas->led_muxed);
reg = pdata->power_ctrl;
slave = PALMAS_BASE_TO_SLAVE(PALMAS_PMU_CONTROL_BASE);
addr = PALMAS_BASE_TO_REG(PALMAS_PMU_CONTROL_BASE, PALMAS_POWER_CTRL);
ret = regmap_write(palmas->regmap[slave], addr, reg);
if (ret)
goto err_irq;
/*
* If we are probing with DT do this the DT way and return here
* otherwise continue and add devices using mfd helpers.
*/
if (node) {
ret = of_platform_populate(node, NULL, NULL, &i2c->dev);
if (ret < 0)
goto err_irq;
else
return ret;
}
children = kmemdup(palmas_children, sizeof(palmas_children),
GFP_KERNEL);
if (!children) {
ret = -ENOMEM;
goto err_irq;
}
children[PALMAS_PMIC_ID].platform_data = pdata->pmic_pdata;
children[PALMAS_PMIC_ID].pdata_size = sizeof(*pdata->pmic_pdata);
children[PALMAS_GPADC_ID].platform_data = pdata->gpadc_pdata;
children[PALMAS_GPADC_ID].pdata_size = sizeof(*pdata->gpadc_pdata);
children[PALMAS_RESOURCE_ID].platform_data = pdata->resource_pdata;
children[PALMAS_RESOURCE_ID].pdata_size =
sizeof(*pdata->resource_pdata);
children[PALMAS_USB_ID].platform_data = pdata->usb_pdata;
children[PALMAS_USB_ID].pdata_size = sizeof(*pdata->usb_pdata);
children[PALMAS_CLK_ID].platform_data = pdata->clk_pdata;
children[PALMAS_CLK_ID].pdata_size = sizeof(*pdata->clk_pdata);
ret = mfd_add_devices(palmas->dev, -1,
children, ARRAY_SIZE(palmas_children),
NULL, 0,
regmap_irq_get_domain(palmas->irq_data));
kfree(children);
if (ret < 0)
goto err_devices;
return ret;
err_devices:
mfd_remove_devices(palmas->dev);
err_irq:
regmap_del_irq_chip(palmas->irq, palmas->irq_data);
err:
return ret;
}
static int palmas_i2c_remove(struct i2c_client *i2c)
{
struct palmas *palmas = i2c_get_clientdata(i2c);
mfd_remove_devices(palmas->dev);
regmap_del_irq_chip(palmas->irq, palmas->irq_data);
return 0;
}
static const struct i2c_device_id palmas_i2c_id[] = {
{ "palmas", },
{ "twl6035", },
{ "twl6037", },
{ "tps65913", },
{ /* end */ }
};
MODULE_DEVICE_TABLE(i2c, palmas_i2c_id);
static struct of_device_id of_palmas_match_tbl[] = {
{ .compatible = "ti,palmas", },
{ /* end */ }
};
static struct i2c_driver palmas_i2c_driver = {
.driver = {
.name = "palmas",
.of_match_table = of_palmas_match_tbl,
.owner = THIS_MODULE,
},
.probe = palmas_i2c_probe,
.remove = palmas_i2c_remove,
.id_table = palmas_i2c_id,
};
static int __init palmas_i2c_init(void)
{
return i2c_add_driver(&palmas_i2c_driver);
}
/* init early so consumer devices can complete system boot */
subsys_initcall(palmas_i2c_init);
static void __exit palmas_i2c_exit(void)
{
i2c_del_driver(&palmas_i2c_driver);
}
module_exit(palmas_i2c_exit);
MODULE_AUTHOR("Graeme Gregory <gg@slimlogic.co.uk>");
MODULE_DESCRIPTION("Palmas chip family multi-function driver");
MODULE_LICENSE("GPL");
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