Commit a6543a1c authored by Patil, Rachna's avatar Patil, Rachna Committed by Sebastian Andrzej Siewior
Browse files

mfd: ti_am335x_tscadc: Add DT support 



Add DT support in the MFD core driver. The node name is "am3359" because
it was tested on this platform.

Signed-off-by: default avatarPantelis Antoniou <panto@antoniou-consulting.com>
Signed-off-by: default avatarPatil, Rachna <rachna@ti.com>
Signed-off-by: default avatarFelipe Balbi <balbi@ti.com>
Signed-off-by: default avatarSebastian Andrzej Siewior <bigeasy@linutronix.de>
parent 0ead4fb2

drivers/mfd/ti_am335x_tscadc.c

+26 −6
Original line number Diff line number Diff line
@@ -22,6 +22,8 @@ 
#include <linux/regmap.h>

#include <linux/mfd/core.h>

#include <linux/pm_runtime.h>

#include <linux/of.h>

#include <linux/of_device.h>



#include <linux/mfd/ti_am335x_tscadc.h>

#include <linux/input/ti_am335x_tsc.h>
@@ -90,20 +92,31 @@ static int ti_tscadc_probe(struct platform_device *pdev) 
	struct resource		*res;

	struct clk		*clk;

	struct mfd_tscadc_board	*pdata = pdev->dev.platform_data;

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

	struct mfd_cell		*cell;

	int			err, ctrl;

	int			clk_value, clock_rate;

	int			tsc_wires, adc_channels = 0, total_channels;

	int			tsc_wires = 0, adc_channels = 0, total_channels;



	if (!pdata) {

	if (!pdata && !pdev->dev.of_node) {

		dev_err(&pdev->dev, "Could not find platform data\n");

		return -EINVAL;

	}



	if (pdev->dev.platform_data) {

		if (pdata->tsc_init)

			tsc_wires = pdata->tsc_init->wires;



		if (pdata->adc_init)

			adc_channels = pdata->adc_init->adc_channels;

	} else {

		node = of_get_child_by_name(pdev->dev.of_node, "tsc");

		of_property_read_u32(node, "ti,wires", &tsc_wires);



		node = of_get_child_by_name(pdev->dev.of_node, "adc");

		of_property_read_u32(node, "ti,adc-channels", &adc_channels);

	}



	tsc_wires = pdata->tsc_init->wires;

	total_channels = tsc_wires + adc_channels;



	if (total_channels > 8) {
@@ -285,11 +298,18 @@ static const struct dev_pm_ops tscadc_pm_ops = { 
#define TSCADC_PM_OPS NULL

#endif



static const struct of_device_id ti_tscadc_dt_ids[] = {

	{ .compatible = "ti,am3359-tscadc", },

	{ }

};

MODULE_DEVICE_TABLE(of, ti_tscadc_dt_ids);



static struct platform_driver ti_tscadc_driver = {

	.driver = {

		.name   = "ti_tscadc",

		.name   = "ti_am3359-tscadc",

		.owner	= THIS_MODULE,

		.pm	= TSCADC_PM_OPS,

		.of_match_table = of_match_ptr(ti_tscadc_dt_ids),

	},

	.probe	= ti_tscadc_probe,

	.remove	= ti_tscadc_remove,