On 5/29/2014 12:14 AM, Greg KH wrote:

On Wed, May 28, 2014 at 02:27:14PM +0530, Satish Patel wrote:

quoted

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 <redacted>
---
  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 :(

Before sending, I have applied these patches to "v3.15-rc7" and build 
with both the option ti-usim & tda8026 as module, as well as part of 
kernel. Any specific tree you would like me to rebase these patches against.