tpm/st33zp24/spi: Add st33zp24 spi phy

st33zp24 TIS 1.2 support also SPI. It is using a proprietary protocol to
transport TIS data.
Acked-by: Jarkko Sakkinen <jarkko.sakknen@linux.intel.com>
Reviewed-by: Jason Gunthorpe <jason.gunthorpe@obsidianresearch.com>
Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com>
Signed-off-by: Peter Huewe <peterhuewe@gmx.de>

drivers/char/tpm/st33zp24/Kconfig

@@ -18,3 +18,13 @@ config TCG_TIS_ST33ZP24_I2C
 	  ST33ZP24 with i2c interface.
 	  To compile this driver as a module, choose M here; the module will be
 	  called tpm_st33zp24_i2c.
+
+config TCG_TIS_ST33ZP24_SPI
+	tristate "TPM 1.2 ST33ZP24 SPI support"
+	depends on TCG_TIS_ST33ZP24
+	depends on SPI
+	---help---
+	  This module adds support for the STMicroelectronics TPM security chip
+	  ST33ZP24 with spi interface.
+	  To compile this driver as a module, choose M here; the module will be
+	  called tpm_st33zp24_spi.

drivers/char/tpm/st33zp24/Makefile

@@ -7,3 +7,6 @@ obj-$(CONFIG_TCG_TIS_ST33ZP24) += tpm_st33zp24.o
 
 tpm_st33zp24_i2c-objs = i2c.o
 obj-$(CONFIG_TCG_TIS_ST33ZP24_I2C) += tpm_st33zp24_i2c.o
+
+tpm_st33zp24_spi-objs = spi.o
+obj-$(CONFIG_TCG_TIS_ST33ZP24_SPI) += tpm_st33zp24_spi.o

drivers/char/tpm/st33zp24/i2c.c

@@ -27,8 +27,6 @@
 #include "st33zp24.h"
 
 #define TPM_DUMMY_BYTE			0xAA
-#define TPM_WRITE_DIRECTION		0x80
-#define TPM_BUFSIZE			2048
 
 struct st33zp24_i2c_phy {
 	struct i2c_client *client;

drivers/char/tpm/st33zp24/st33zp24.h

@@ -18,6 +18,9 @@
 #ifndef __LOCAL_ST33ZP24_H__
 #define __LOCAL_ST33ZP24_H__
 
+#define TPM_WRITE_DIRECTION             0x80
+#define TPM_BUFSIZE                     2048
+
 struct st33zp24_phy_ops {
 	int (*send)(void *phy_id, u8 tpm_register, u8 *tpm_data, int tpm_size);
 	int (*recv)(void *phy_id, u8 tpm_register, u8 *tpm_data, int tpm_size);