Commit 37e13cec authored by Peter Ujfalusi's avatar Peter Ujfalusi Committed by Samuel Ortiz
Browse files

mfd: Add support for Device Tree to twl6040 



Device tree based probing support for the core twl6040 driver. Child
devices will be created as MFD devices:
- ASoC codec is always created
- Vibra child is only created if the vibra section present in the DT blob.

Signed-off-by: default avatarPeter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: default avatarSamuel Ortiz <sameo@linux.intel.com>
parent 1f01d60e

Documentation/devicetree/bindings/mfd/twl6040.txt

0 → 100644
+62 −0
Original line number Diff line number Diff line 
Texas Instruments TWL6040 family



The TWL6040s are 8-channel high quality low-power audio codecs providing audio

and vibra functionality on OMAP4+ platforms.

They are connected ot the host processor via i2c for commands, McPDM for audio

data and commands.



Required properties:

- compatible : Must be "ti,twl6040";

- reg: must be 0x4b for i2c address

- interrupts: twl6040 has one interrupt line connecteded to the main SoC

- interrupt-parent: The parent interrupt controller

- twl6040,audpwron-gpio: Power on GPIO line for the twl6040



- vio-supply: Regulator for the twl6040 VIO supply

- v2v1-supply: Regulator for the twl6040 V2V1 supply



Optional properties, nodes:

- enable-active-high: To power on the twl6040 during boot.



Vibra functionality

Required properties:

- vddvibl-supply: Regulator for the left vibra motor

- vddvibr-supply: Regulator for the right vibra motor

- vibra { }: Configuration section for vibra parameters containing the following

	     properties:

- ti,vibldrv-res: Resistance parameter for left driver

- ti,vibrdrv-res: Resistance parameter for right driver

- ti,viblmotor-res: Resistance parameter for left motor

- ti,viblmotor-res: Resistance parameter for right motor



Optional properties within vibra { } section:

- vddvibl_uV: If the vddvibl default voltage need to be changed

- vddvibr_uV: If the vddvibr default voltage need to be changed



Example:

&i2c1 {

	twl6040: twl@4b {

		compatible = "ti,twl6040";

		reg = <0x4b>;



		interrupts = <0 119 4>;

		interrupt-parent = <&gic>;

		twl6040,audpwron-gpio = <&gpio4 31 0>;



		vio-supply = <&v1v8>;

		v2v1-supply = <&v2v1>;

		enable-active-high;



		/* regulators for vibra motor */

		vddvibl-supply = <&vbat>;

		vddvibr-supply = <&vbat>;



		vibra {

			/* Vibra driver, motor resistance parameters */

			ti,vibldrv-res = <8>;

			ti,vibrdrv-res = <3>;

			ti,viblmotor-res = <10>;

			ti,vibrmotor-res = <10>;

		};

	};

};

drivers/mfd/twl6040-core.c

+19 −8
Original line number Diff line number Diff line
@@ -29,6 +29,10 @@ 
#include <linux/kernel.h>

#include <linux/err.h>

#include <linux/platform_device.h>

#include <linux/of.h>

#include <linux/of_irq.h>

#include <linux/of_gpio.h>

#include <linux/of_platform.h>

#include <linux/gpio.h>

#include <linux/delay.h>

#include <linux/i2c.h>
@@ -505,11 +509,12 @@ static int __devinit twl6040_probe(struct i2c_client *client, 
				     const struct i2c_device_id *id)

{

	struct twl6040_platform_data *pdata = client->dev.platform_data;

	struct device_node *node = client->dev.of_node;

	struct twl6040 *twl6040;

	struct mfd_cell *cell = NULL;

	int irq, ret, children = 0;



	if (!pdata) {

	if (!pdata && !node) {

		dev_err(&client->dev, "Platform data is missing\n");

		return -EINVAL;

	}
@@ -560,9 +565,13 @@ static int __devinit twl6040_probe(struct i2c_client *client, 
	twl6040->rev = twl6040_reg_read(twl6040, TWL6040_REG_ASICREV);



	/* ERRATA: Automatic power-up is not possible in ES1.0 */

	if (twl6040_get_revid(twl6040) > TWL6040_REV_ES1_0)

	if (twl6040_get_revid(twl6040) > TWL6040_REV_ES1_0) {

		if (pdata)

			twl6040->audpwron = pdata->audpwron_gpio;

		else

			twl6040->audpwron = of_get_named_gpio(node,

						"ti,audpwron-gpio", 0);

	} else

		twl6040->audpwron = -EINVAL;



	if (gpio_is_valid(twl6040->audpwron)) {
@@ -602,13 +611,13 @@ static int __devinit twl6040_probe(struct i2c_client *client, 
	twl6040_codec_rsrc[0].end = irq;

	cell->resources = twl6040_codec_rsrc;

	cell->num_resources = ARRAY_SIZE(twl6040_codec_rsrc);

	if (pdata->codec) {

	if (pdata && pdata->codec) {

		cell->platform_data = pdata->codec;

		cell->pdata_size = sizeof(*pdata->codec);

	}

	children++;



	if (pdata->vibra) {

	if ((pdata && pdata->vibra) || of_find_node_by_name(node, "vibra")) {

		irq = twl6040->irq_base + TWL6040_IRQ_VIB;



		cell = &twl6040->cells[children];
@@ -618,8 +627,10 @@ static int __devinit twl6040_probe(struct i2c_client *client, 
		cell->resources = twl6040_vibra_rsrc;

		cell->num_resources = ARRAY_SIZE(twl6040_vibra_rsrc);



		if (pdata && pdata->vibra) {

			cell->platform_data = pdata->vibra;

			cell->pdata_size = sizeof(*pdata->vibra);

		}

		children++;

	}

drivers/mfd/twl6040-irq.c

+6 −0
Original line number Diff line number Diff line
@@ -25,6 +25,8 @@ 
#include <linux/module.h>

#include <linux/err.h>

#include <linux/irq.h>

#include <linux/of.h>

#include <linux/irqdomain.h>

#include <linux/interrupt.h>

#include <linux/mfd/core.h>

#include <linux/mfd/twl6040.h>
@@ -139,6 +141,7 @@ static irqreturn_t twl6040_irq_thread(int irq, void *data) 


int twl6040_irq_init(struct twl6040 *twl6040)

{

	struct device_node *node = twl6040->dev->of_node;

	int i, nr_irqs, irq_base, ret;

	u8 val;
@@ -158,6 +161,9 @@ int twl6040_irq_init(struct twl6040 *twl6040) 
	}

	twl6040->irq_base = irq_base;



	irq_domain_add_legacy(node, ARRAY_SIZE(twl6040_irqs), irq_base, 0,

			      &irq_domain_simple_ops, NULL);



	/* Register them with genirq */

	for (i = irq_base; i < irq_base + nr_irqs; i++) {

		irq_set_chip_data(i, twl6040);

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