diff options
Diffstat (limited to 'driver/ioexpander/it8801.h')
| -rw-r--r-- | driver/ioexpander/it8801.h | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/driver/ioexpander/it8801.h b/driver/ioexpander/it8801.h new file mode 100644 index 0000000000..9b84adf764 --- /dev/null +++ b/driver/ioexpander/it8801.h @@ -0,0 +1,46 @@ +/* Copyright 2019 The Chromium OS Authors. All rights reserved. + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + * + * IT8801 is an I/O expander with the keyboard matrix controller. + * + */ + +#ifndef __CROS_EC_IO_EXPANDER_IT8801_H +#define __CROS_EC_IO_EXPANDER_IT8801_H + +/* I2C slave address(7-bit without R/W) */ +#define IT8801_I2C_ADDR 0x38 + +/* Keyboard Matrix Scan control (KBS) */ +#define IT8801_REG_KSOMCR 0x40 +#define IT8801_REG_MASK_KSOSDIC BIT(7) +#define IT8801_REG_MASK_KSE BIT(6) +#define IT8801_REG_MASK_AKSOSC BIT(5) +#define IT8801_REG_KSIDR 0x41 +#define IT8801_REG_KSIEER 0x42 +#define IT8801_REG_KSIIER 0x43 +#define IT8801_REG_SMBCR 0xfa +#define IT8801_REG_MASK_ARE BIT(4) +#define IT8801_REG_GIECR 0xfb +#define IT8801_REG_MASK_GKSIIE BIT(3) +#define IT8801_REG_GPIO10 0x12 +#define IT8801_REG_GPIO00_KSO19 0x0a +#define IT8801_REG_GPIO01_KSO18 0x0b +#define IT8801_REG_GPIO22_KSO21 0x1c +#define IT8801_REG_GPIO23_KSO20 0x1d +#define IT8801_REG_MASK_GPIOAFS_PULLUP BIT(7) +#define IT8801_REG_MASK_GPIOAFS_FUNC2 BIT(6) +#define IT8801_REG_MASK_GPIODIR BIT(5) +#define IT8801_REG_MASK_GPIOPUE BIT(0) +#define IT8801_REG_GPIOG2SOVR 0x07 +#define IT8801_REG_GPIO23SOV BIT(3) +#define IT8801_REG_MASK_SELKSO2 0x02 +#define IT8801_REG_LBVIDR 0xFE +#define IT8801_REG_HBVIDR 0xFF +#define IT8801_KSO_COUNT 18 + +/* ISR for IT8801's SMB_INT# */ +void io_expander_it8801_interrupt(enum gpio_signal signal); + +#endif /* __CROS_EC_KBEXPANDER_IT8801_H */ |