diff --git a/drivers/staging/media/atomisp/Makefile b/drivers/staging/media/atomisp/Makefile
index 38b370124109..dcf469bf1cb4 100644
--- a/drivers/staging/media/atomisp/Makefile
+++ b/drivers/staging/media/atomisp/Makefile
@@ -150,13 +150,8 @@ atomisp-objs += \
 	pci/hive_isp_css_common/host/timed_ctrl.o \
 	pci/hive_isp_css_common/host/vmem.o \
 	pci/hive_isp_css_shared/host/tag.o \
-	pci/system_local.o
-
-# These will be needed when clean merge CHT support nicely into the driver
-# Keep them here handy for when we get to that point
-#
-
-obj-cht = \
+	pci/system_local.o \
+	pci/runtime/isys/src/ibuf_ctrl_rmgr.o \
 	pci/css_2401_system/host/csi_rx.o \
 	pci/css_2401_system/host/ibuf_ctrl.o \
 	pci/css_2401_system/host/isys_dma.o \
@@ -307,9 +302,6 @@ DEFINES := -DHRT_HW -DHRT_ISP_CSS_CUSTOM_HOST -DHRT_USE_VIR_ADDRS -D__HOST__
 #DEFINES += -DUSE_KMEM_CACHE
 
 ifeq ($(CONFIG_VIDEO_ATOMISP_ISP2401),y)
-atomisp-objs += \
-	$(obj-cht) \
-	pci/runtime/isys/src/ibuf_ctrl_rmgr.o
 DEFINES += -DISP2401
 endif
 
diff --git a/drivers/staging/media/atomisp/pci/runtime/isys/interface/ia_css_isys.h b/drivers/staging/media/atomisp/pci/runtime/isys/interface/ia_css_isys.h
index 711a321e9a3f..d067b9fc43c7 100644
--- a/drivers/staging/media/atomisp/pci/runtime/isys/interface/ia_css_isys.h
+++ b/drivers/staging/media/atomisp/pci/runtime/isys/interface/ia_css_isys.h
@@ -24,20 +24,18 @@
 #include <system_global.h>
 #include "ia_css_isys_comm.h"
 
-#ifdef ISP2401
 /**
  * Virtual Input System. (Input System 2401)
  */
 typedef isp2401_input_system_cfg_t	ia_css_isys_descr_t;
 /* end of Virtual Input System */
-#endif
+
 
 input_system_err_t ia_css_isys_init(void);
 void ia_css_isys_uninit(void);
 enum mipi_port_id ia_css_isys_port_to_mipi_port(
     enum mipi_port_id api_port);
 
-#if defined(ISP2401)
 
 /**
  * @brief Register one (virtual) stream. This is used to track when all
@@ -74,9 +72,7 @@ int ia_css_isys_convert_compressed_format(
     struct isp2401_input_system_cfg_s *cfg);
 unsigned int ia_css_csi2_calculate_input_system_alignment(
     enum atomisp_input_format fmt_type);
-#endif
 
-#if !defined(ISP2401)
 /* CSS Receiver */
 void ia_css_isys_rx_configure(
     const rx_cfg_t *config,
@@ -93,7 +89,6 @@ void ia_css_isys_rx_clear_irq_info(enum mipi_port_id port,
 				   unsigned int irq_infos);
 unsigned int ia_css_isys_rx_translate_irq_infos(unsigned int bits);
 
-#endif /* #if !defined(ISP2401) */
 
 /* @brief Translate format and compression to format type.
  *
@@ -111,7 +106,6 @@ int ia_css_isys_convert_stream_format_to_mipi_format(
     mipi_predictor_t compression,
     unsigned int *fmt_type);
 
-#ifdef ISP2401
 /**
  * Virtual Input System. (Input System 2401)
  */
@@ -178,6 +172,5 @@ void ia_css_isys_stream2mmio_sid_rmgr_release(
     stream2mmio_sid_ID_t	*sid);
 
 /* end of Virtual Input System */
-#endif
 
 #endif				/* __IA_CSS_ISYS_H__ */
diff --git a/drivers/staging/media/atomisp/pci/runtime/isys/interface/ia_css_isys_comm.h b/drivers/staging/media/atomisp/pci/runtime/isys/interface/ia_css_isys_comm.h
index d80ef42c7a64..784afc82c8d2 100644
--- a/drivers/staging/media/atomisp/pci/runtime/isys/interface/ia_css_isys_comm.h
+++ b/drivers/staging/media/atomisp/pci/runtime/isys/interface/ia_css_isys_comm.h
@@ -19,7 +19,6 @@
 #include <type_support.h>
 #include <input_system.h>
 
-#ifdef ISP2401
 #include <platform_support.h>		/* inline */
 #include <input_system_global.h>
 #include <ia_css_stream_public.h>	/* IA_CSS_STREAM_MAX_ISYS_STREAM_PER_CH */
@@ -50,5 +49,4 @@ static inline uint32_t ia_css_isys_generate_stream_id(
 	return sp_thread_id * IA_CSS_STREAM_MAX_ISYS_STREAM_PER_CH + stream_id;
 }
 
-#endif  /* ISP2401*/
 #endif  /*_IA_CSS_ISYS_COMM_H */
diff --git a/drivers/staging/media/atomisp/pci/runtime/isys/src/csi_rx_rmgr.c b/drivers/staging/media/atomisp/pci/runtime/isys/src/csi_rx_rmgr.c
index 3fc9fed1e516..881036c67baf 100644
--- a/drivers/staging/media/atomisp/pci/runtime/isys/src/csi_rx_rmgr.c
+++ b/drivers/staging/media/atomisp/pci/runtime/isys/src/csi_rx_rmgr.c
@@ -15,7 +15,6 @@
 
 #include "system_global.h"
 
-#ifdef ISP2401
 
 #include "assert_support.h"
 #include "platform_support.h"
@@ -165,4 +164,3 @@ int ia_css_isys_csi_rx_unregister_stream(
 	}
 	return retval;
 }
-#endif
diff --git a/drivers/staging/media/atomisp/pci/runtime/isys/src/isys_dma_rmgr.c b/drivers/staging/media/atomisp/pci/runtime/isys/src/isys_dma_rmgr.c
index 261c6460e970..4df0a9188ee6 100644
--- a/drivers/staging/media/atomisp/pci/runtime/isys/src/isys_dma_rmgr.c
+++ b/drivers/staging/media/atomisp/pci/runtime/isys/src/isys_dma_rmgr.c
@@ -15,7 +15,6 @@
 
 #include "system_global.h"
 
-#ifdef ISP2401
 
 #include "assert_support.h"
 #include "platform_support.h"
@@ -85,4 +84,3 @@ void ia_css_isys_dma_channel_rmgr_release(
 		}
 	}
 }
-#endif
diff --git a/drivers/staging/media/atomisp/pci/runtime/isys/src/isys_stream2mmio_rmgr.c b/drivers/staging/media/atomisp/pci/runtime/isys/src/isys_stream2mmio_rmgr.c
index fb0cb183f701..b6be63746c3e 100644
--- a/drivers/staging/media/atomisp/pci/runtime/isys/src/isys_stream2mmio_rmgr.c
+++ b/drivers/staging/media/atomisp/pci/runtime/isys/src/isys_stream2mmio_rmgr.c
@@ -15,7 +15,6 @@
 
 #include "system_global.h"
 
-#ifdef ISP2401
 
 #include "assert_support.h"
 #include "platform_support.h"
@@ -87,4 +86,3 @@ void ia_css_isys_stream2mmio_sid_rmgr_release(
 		}
 	}
 }
-#endif
diff --git a/drivers/staging/media/atomisp/pci/runtime/isys/src/virtual_isys.c b/drivers/staging/media/atomisp/pci/runtime/isys/src/virtual_isys.c
index def8a0b1d2ec..269a81190577 100644
--- a/drivers/staging/media/atomisp/pci/runtime/isys/src/virtual_isys.c
+++ b/drivers/staging/media/atomisp/pci/runtime/isys/src/virtual_isys.c
@@ -17,7 +17,6 @@
 
 #include "system_global.h"
 
-#ifdef ISP2401
 
 #include "ia_css_isys.h"
 #include "ia_css_debug.h"
@@ -866,4 +865,3 @@ static csi_mipi_packet_type_t get_csi_mipi_packet_type(
 }
 
 /* end of Private Methods */
-#endif