ba11dc8065
Add a property to adjust the I2C data hold time which will pass the SI test. Signed-off-by: Tim Lin <tim2.lin@ite.corp-partner.google.com>
50 lines
1.3 KiB
YAML
50 lines
1.3 KiB
YAML
# Copyright (c) 2022 ITE Corporation. All Rights Reserved.
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# SPDX-License-Identifier: Apache-2.0
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description: ITE enhance I2C
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compatible: "ite,enhance-i2c"
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include: ite,common-i2c.yaml
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properties:
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prescale-scl-low:
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type: int
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description: |
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This option is used to configure the I2C speed prescaler for
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the SCL low period. When set to >= 1, it will increase the
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low period of the SCL clock and so reduce the signal frequency.
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The resulting SCL cycle time is given by the following formula:
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SCL cycle = 2 * (psr + prescale_tweak + 2) *
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SMBus clock cycle
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data-hold-time:
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type: int
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default: 3
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enum:
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- 3
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- 4
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- 5
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- 6
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- 7
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- 8
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- 9
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- 10
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description: |
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This option is used to configure the data hold time of the I2C.
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The unit is number of SMB clock cycles. The time calculation
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is (data-hold-time / smb_clk) seconds.
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target-enable:
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type: boolean
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description: |
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This option is used when the I2C target is enabled. It is
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necessary to prevent the target port from being configured
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with I2C host related initialization.
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target-pio-mode:
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type: boolean
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description: |
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This option is used when the I2C target is enabled and it can
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support PIO mode for I2C target transfer.
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