platform/chrome/cros_ec_lpc_mec.c

1 // SPDX-License-Identifier: GPL-2.0
30  * cros_ec_lpc_mec_lock() - Acquire mutex for EMI
46 		return -EBUSY;  in cros_ec_lpc_mec_lock()
52  * cros_ec_lpc_mec_unlock() - Release mutex for EMI
67 		return -EBUSY;  in cros_ec_lpc_mec_unlock()
73  * cros_ec_lpc_mec_emi_write_address() - Initialize EMI at a given address.
76  * @access_type: Type of access, typically 32-bit auto-increment
86  * cros_ec_lpc_mec_in_range() - Determine if addresses are in MEC EMI range.
91  * Return: 1 if in range, 0 if not, and -EINVAL on failure
92  *         such as the mec range not being initialized
97 		return -EINVAL;  in cros_ec_lpc_mec_in_range()
100 		if (WARN_ON(offset + length - 1 >= mec_emi_end))  in cros_ec_lpc_mec_in_range()
101 			return -EINVAL;  in cros_ec_lpc_mec_in_range()
106 		return -EINVAL;  in cros_ec_lpc_mec_in_range()
112  * cros_ec_lpc_io_bytes_mec() - Read / write bytes to MEC EMI port.
119  * @return:  A negative error code on error, or 8-bit checksum of all
174 		 * Use long auto-increment access except for misaligned write,  in cros_ec_lpc_io_bytes_mec()
177 		if (length - i < 4 && io_type == MEC_IO_WRITE)  in cros_ec_lpc_io_bytes_mec()
213 		return -ENOENT;  in cros_ec_lpc_mec_acpi_mutex()
215 	status = acpi_get_handle(adev->handle, pathname, &aml_mutex);  in cros_ec_lpc_mec_acpi_mutex()
217 		return -ENOENT;  in cros_ec_lpc_mec_acpi_mutex()