dm: i2c: Add I2C emulation driver for sandbox

In order to test I2C we need some sort of emulation interface. Add hooks
to allow a driver to emulate an I2C device for sandbox.

Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Heiko Schocher <hs@denx.de>
Reviewed-by: Masahiro Yamada <yamada.m@jp.panasonic.com>

diff --git a/drivers/i2c/Makefile b/drivers/i2c/Makefile
index 063e097603091e54ddef29c50e5509dabfd9e016..5a93473edce4cdcbccc0bd4045e6f9559dcc6b01 100644 (file)
--- a/drivers/i2c/Makefile
+++ b/drivers/i2c/Makefile
@@ -27,6 +27,7 @@ obj-$(CONFIG_SYS_I2C_OMAP34XX) += omap24xx_i2c.o
 obj-$(CONFIG_SYS_I2C_PPC4XX) += ppc4xx_i2c.o
 obj-$(CONFIG_SYS_I2C_RCAR) += rcar_i2c.o
 obj-$(CONFIG_SYS_I2C_S3C24X0) += s3c24x0_i2c.o
+obj-$(CONFIG_SYS_I2C_SANDBOX) += i2c-emul-uclass.o
 obj-$(CONFIG_SYS_I2C_SH) += sh_i2c.o
 obj-$(CONFIG_SYS_I2C_SOFT) += soft_i2c.o
 obj-$(CONFIG_SYS_I2C_TEGRA) += tegra_i2c.o

diff --git a/drivers/i2c/i2c-emul-uclass.c b/drivers/i2c/i2c-emul-uclass.c
new file mode 100644 (file)
index 0000000..aa89f95
--- /dev/null
+++ b/drivers/i2c/i2c-emul-uclass.c
@@ -0,0 +1,14 @@
+/*
+ * Copyright (c) 2014 Google, Inc
+ *
+ * SPDX-License-Identifier:    GPL-2.0+
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <i2c.h>
+
+UCLASS_DRIVER(i2c_emul) = {
+       .id             = UCLASS_I2C_EMUL,
+       .name           = "i2c_emul",
+};

diff --git a/include/dm/uclass-id.h b/include/dm/uclass-id.h
index 01866c3a9c15e87d9f669320ae5ef4a3102043b7..16e4224c1641381570dab6ee43accb753e22f853 100644 (file)
--- a/include/dm/uclass-id.h
+++ b/include/dm/uclass-id.h
@@ -19,6 +19,7 @@ enum uclass_id {
        UCLASS_TEST_FDT,
        UCLASS_TEST_BUS,
        UCLASS_SPI_EMUL,        /* sandbox SPI device emulator */
+       UCLASS_I2C_EMUL,        /* sandbox I2C device emulator */
        UCLASS_SIMPLE_BUS,
 
        /* U-Boot uclasses start here */