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Commit 04654c38 authored by Uri Mashiach's avatar Uri Mashiach Committed by Kalle Valo
Browse files

wlcore/wl12xx: spi: add device tree support 



Add DT support for the wl1271 SPI WiFi.

Add documentation file for the wl1271 SPI WiFi.

Signed-off-by: default avatarUri Mashiach <uri.mashiach@compulab.co.il>
Acked-by: default avatarRob Herring <robh@kernel.org>
Tested-By: default avatarSebastian Reichel <sre@kernel.org>
Reviewed-by: default avatarGrygorii Strashko <grygorii.strashko@ti.com>
Acked-by: default avatarIgor Grinberg <grinberg@compulab.co.il>
Signed-off-by: default avatarKalle Valo <kvalo@codeaurora.org>
parent 4c1ce07b

Documentation/devicetree/bindings/net/wireless/ti,wlcore,spi.txt

0 → 100644
+36 −0
Original line number Diff line number Diff line 
* Texas Instruments wl1271 wireless lan controller



The wl1271 chip can be connected via SPI or via SDIO. This

document describes the binding for the SPI connected chip.



Required properties:

- compatible :          Should be "ti,wl1271"

- reg :                 Chip select address of device

- spi-max-frequency :   Maximum SPI clocking speed of device in Hz

- ref-clock-frequency : Reference clock frequency

- interrupt-parent, interrupts :

                        Should contain parameters for 1 interrupt line.

                        Interrupt parameters: parent, line number, type.

- vwlan-supply :        Point the node of the regulator that powers/enable the wl1271 chip



Optional properties:

- clock-xtal :          boolean, clock is generated from XTAL



- Please consult Documentation/devicetree/bindings/spi/spi-bus.txt

  for optional SPI connection related properties,



Examples:



&spi1 {

	wl1271@1 {

		compatible = "ti,wl1271";



		reg = <1>;

		spi-max-frequency = <48000000>;

		clock-xtal;

		ref-clock-frequency = <38400000>;

		interrupt-parent = <&gpio3>;

		interrupts = <8 IRQ_TYPE_LEVEL_HIGH>;

		vwlan-supply = <&vwlan_fixed>;

	};

};

drivers/net/wireless/ti/wlcore/Kconfig

+1 −1
Original line number Diff line number Diff line
@@ -13,7 +13,7 @@ config WLCORE 


config WLCORE_SPI

	tristate "TI wlcore SPI support"

	depends on WLCORE && SPI_MASTER

	depends on WLCORE && SPI_MASTER && OF

	select CRC7

	---help---

	  This module adds support for the SPI interface of adapters using

drivers/net/wireless/ti/wlcore/spi.c

+43 −4
Original line number Diff line number Diff line
@@ -30,6 +30,7 @@ 
#include <linux/spi/spi.h>

#include <linux/wl12xx.h>

#include <linux/platform_device.h>

#include <linux/of_irq.h>

#include <linux/regulator/consumer.h>



#include "wlcore.h"
@@ -357,6 +358,39 @@ static struct wl1271_if_operations spi_ops = { 
	.set_block_size = NULL,

};



static const struct of_device_id wlcore_spi_of_match_table[] = {

	{ .compatible = "ti,wl1271" },

	{ }

};

MODULE_DEVICE_TABLE(of, wlcore_spi_of_match_table);



/**

 * wlcore_probe_of - DT node parsing.

 * @spi: SPI slave device parameters.

 * @res: resource parameters.

 * @glue: wl12xx SPI bus to slave device glue parameters.

 * @pdev_data: wlcore device parameters

 */

static int wlcore_probe_of(struct spi_device *spi, struct wl12xx_spi_glue *glue,

			   struct wlcore_platdev_data *pdev_data)

{

	struct device_node *dt_node = spi->dev.of_node;

	int ret;



	if (of_find_property(dt_node, "clock-xtal", NULL))

		pdev_data->ref_clock_xtal = true;



	ret = of_property_read_u32(dt_node, "ref-clock-frequency",

				   &pdev_data->ref_clock_freq);

	if (IS_ERR_VALUE(ret)) {

		dev_err(glue->dev,

			"can't get reference clock frequency (%d)\n", ret);

		return ret;

	}



	return 0;

}



static int wl1271_probe(struct spi_device *spi)

{

	struct wl12xx_spi_glue *glue;
@@ -366,8 +400,6 @@ static int wl1271_probe(struct spi_device *spi) 


	memset(&pdev_data, 0x00, sizeof(pdev_data));



	/* TODO: add DT parsing when needed */



	pdev_data.if_ops = &spi_ops;



	glue = devm_kzalloc(&spi->dev, sizeof(*glue), GFP_KERNEL);
@@ -392,6 +424,13 @@ static int wl1271_probe(struct spi_device *spi) 
		return PTR_ERR(glue->reg);

	}



	ret = wlcore_probe_of(spi, glue, &pdev_data);

	if (IS_ERR_VALUE(ret)) {

		dev_err(glue->dev,

			"can't get device tree parameters (%d)\n", ret);

		return ret;

	}



	ret = spi_setup(spi);

	if (ret < 0) {

		dev_err(glue->dev, "spi_setup failed\n");
@@ -409,7 +448,7 @@ static int wl1271_probe(struct spi_device *spi) 
	memset(res, 0x00, sizeof(res));



	res[0].start = spi->irq;

	res[0].flags = IORESOURCE_IRQ;

	res[0].flags = IORESOURCE_IRQ | irq_get_trigger_type(spi->irq);

	res[0].name = "irq";



	ret = platform_device_add_resources(glue->core, res, ARRAY_SIZE(res));
@@ -447,10 +486,10 @@ static int wl1271_remove(struct spi_device *spi) 
	return 0;

}





static struct spi_driver wl1271_spi_driver = {

	.driver = {

		.name		= "wl1271_spi",

		.of_match_table = of_match_ptr(wlcore_spi_of_match_table),

	},



	.probe		= wl1271_probe,