Subject: [PATCH v3 2/5] misc: tda8026: Add NXP TDA8026 PHY driver

From: [email-masked] (Greg KH)
Date: Wed, 28 May 2014 11:44:50 -0700

On Wed, May 28, 2014 at 02:27:14PM +0530, Satish Patel wrote:
> TDA8026 is a SmartCard PHY from NXP.
> 
> The PHY interfaces with the main processor over the
> I2C interface and acts as a slave device.
> 
> The driver also exposes the phy interface
> (defined at include/linux/sc_phy.h) for SmartCard controller.
> Controller uses this interface to communicate with smart card
> inserted to the phy's slot.
> 
> Note: gpio irq is not validated as I do not have device with that.
> I have validated interrupt with dedicated interrupt line on my device.
> 
> Signed-off-by: Satish Patel <[email-masked]>
> ---
>  Documentation/devicetree/bindings/misc/tda8026.txt |   19 +
>  drivers/misc/Kconfig                               |    7 +
>  drivers/misc/Makefile                              |    1 +
>  drivers/misc/tda8026.c                             | 1258 ++++++++++++++++++++
>  4 files changed, 1285 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/misc/tda8026.txt
>  create mode 100644 drivers/misc/tda8026.c
> 
> diff --git a/Documentation/devicetree/bindings/misc/tda8026.txt b/Documentation/devicetree/bindings/misc/tda8026.txt
> new file mode 100644
> index 0000000..f115c9c
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/misc/tda8026.txt
> @@ -0,0 +1,19 @@
> +TDA8026 smart card slot interface
> +
> +This is an i2c based smart card interface device forming the electrical
> +interface between a microcontroller and smart cards. This device supports
> +asynchronous cards (micro controller-based IC cards) as well as synchronous
> +cards (mainly memory cards)
> +
> +Required properties:
> +- compatible: "nxp,tda8026"
> +- shutdown-gpio = GPIO pin mapping for SDWNN pin
> +- reg = i2c interface address
> +
> +
> +Example:
> +tda8026: tda8026 at 48 {
> +		 compatible = "nxp,tda8026";
> +		 reg = <0x48>;
> +		 shutdown-gpio = <&gpio5 19 GPIO_ACTIVE_HIGH>;/* Bank5, pin19 */
> +	 };
> diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig
> index 8baff0e..80b21d7 100644
> --- a/drivers/misc/Kconfig
> +++ b/drivers/misc/Kconfig
> @@ -515,6 +515,13 @@ config SRAM
>  	  the genalloc API. It is supposed to be used for small on-chip SRAM
>  	  areas found on many SoCs.
>  
> +config NXP_TDA8026_PHY
> +        tristate "NXP PHY Driver for Smart Card PHY"
> +        depends on I2C=y
> +        help
> +          If you say yes here you get support for the TDA8026 Smart card PHY
> +	  with I2C interface.
> +
>  source "drivers/misc/c2port/Kconfig"
>  source "drivers/misc/eeprom/Kconfig"
>  source "drivers/misc/cb710/Kconfig"
> diff --git a/drivers/misc/Makefile b/drivers/misc/Makefile
> index 7eb4b69..f262c0b 100644
> --- a/drivers/misc/Makefile
> +++ b/drivers/misc/Makefile
> @@ -55,3 +55,4 @@ obj-$(CONFIG_SRAM)		+= sram.o
>  obj-y				+= mic/
>  obj-$(CONFIG_GENWQE)		+= genwqe/
>  obj-$(CONFIG_ECHO)		+= echo/
> +obj-$(CONFIG_NXP_TDA8026_PHY)	+= tda8026.o
> diff --git a/drivers/misc/tda8026.c b/drivers/misc/tda8026.c
> new file mode 100644
> index 0000000..38df33e
> --- /dev/null
> +++ b/drivers/misc/tda8026.c
> @@ -0,0 +1,1258 @@
> +/*
> + * tda8026.c - TDA8026 PHY driver for NXP Smart card PHY
> + *
> + *
> + * Copyright (C) 2013 Texas Instruments Incorporated - http://www.ti.com/
> + *
> + * 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 version 2.
> + *
> + * This program is distributed "as is" WITHOUT ANY WARRANTY of any
> + * kind, whether express or implied; without even the implied warranty
> + * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> + * GNU General Public License for more details.
> + */
> +
> +#include <linux/module.h>
> +#include <linux/moduleparam.h>
> +#include <linux/interrupt.h>
> +#include <linux/init.h>
> +#include <linux/slab.h>
> +#include <linux/gpio.h>
> +#include <linux/i2c.h>
> +#include <linux/mfd/core.h>
> +#include <linux/notifier.h>
> +#include <linux/sc_phy.h>
> +#include <linux/of_gpio.h>
> +#include <linux/of_device.h>
> +#include <linux/delay.h>

I think you just broke the build if this driver is enabled now right?

Not good :(