diff --git a/libc/kernel/uapi/linux/hsi/hsi_char.h b/libc/kernel/uapi/linux/hsi/hsi_char.h
new file mode 100644
index 0000000..9c97e29
--- /dev/null
+++ b/libc/kernel/uapi/linux/hsi/hsi_char.h
@@ -0,0 +1,59 @@
+/****************************************************************************
+ ****************************************************************************
+ ***
+ ***   This header was automatically generated from a Linux kernel header
+ ***   of the same name, to make information necessary for userspace to
+ ***   call into the kernel available to libc.  It contains only constants,
+ ***   structures, and macros generated from the original header, and thus,
+ ***   contains no copyrightable information.
+ ***
+ ***   To edit the content of this header, modify the corresponding
+ ***   source file (e.g. under external/kernel-headers/original/) then
+ ***   run bionic/libc/kernel/tools/update_all.py
+ ***
+ ***   Any manual change here will be lost the next time this script will
+ ***   be run. You've been warned!
+ ***
+ ****************************************************************************
+ ****************************************************************************/
+#ifndef __HSI_CHAR_H
+#define __HSI_CHAR_H
+#define HSI_CHAR_MAGIC 'k'
+#define HSC_IOW(num, dtype) _IOW(HSI_CHAR_MAGIC, num, dtype)
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define HSC_IOR(num, dtype) _IOR(HSI_CHAR_MAGIC, num, dtype)
+#define HSC_IOWR(num, dtype) _IOWR(HSI_CHAR_MAGIC, num, dtype)
+#define HSC_IO(num) _IO(HSI_CHAR_MAGIC, num)
+#define HSC_RESET HSC_IO(16)
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define HSC_SET_PM HSC_IO(17)
+#define HSC_SEND_BREAK HSC_IO(18)
+#define HSC_SET_RX HSC_IOW(19, struct hsc_rx_config)
+#define HSC_GET_RX HSC_IOW(20, struct hsc_rx_config)
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define HSC_SET_TX HSC_IOW(21, struct hsc_tx_config)
+#define HSC_GET_TX HSC_IOW(22, struct hsc_tx_config)
+#define HSC_PM_DISABLE 0
+#define HSC_PM_ENABLE 1
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define HSC_MODE_STREAM 1
+#define HSC_MODE_FRAME 2
+#define HSC_FLOW_SYNC 0
+#define HSC_ARB_RR 0
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define HSC_ARB_PRIO 1
+struct hsc_rx_config {
+ uint32_t mode;
+ uint32_t flow;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ uint32_t channels;
+};
+struct hsc_tx_config {
+ uint32_t mode;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ uint32_t channels;
+ uint32_t speed;
+ uint32_t arb_mode;
+};
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#endif