| // SPDX-License-Identifier: GPL-2.0-only |
| /* |
| * Copyright (c) 2018, The Linux Foundation. All rights reserved. |
| */ |
| |
| &soc { |
| tlmm: pinctrl@f000000 { |
| compatible = "qcom,lito-pinctrl"; |
| reg = <0x0f000000 0x1000000>; |
| interrupts = <GIC_SPI 208 IRQ_TYPE_LEVEL_HIGH>; |
| gpio-controller; |
| #gpio-cells = <2>; |
| interrupt-controller; |
| #interrupt-cells = <2>; |
| |
| ufs_dev_reset_assert: ufs_dev_reset_assert { |
| config { |
| pins = "ufs_reset"; |
| bias-pull-down; /* default: pull down */ |
| /* |
| * UFS_RESET driver strengths are having |
| * different values/steps compared to typical |
| * GPIO drive strengths. |
| * |
| * Following table clarifies: |
| * |
| * HDRV value | UFS_RESET | Typical GPIO |
| * (dec) | (mA) | (mA) |
| * 0 | 0.8 | 2 |
| * 1 | 1.55 | 4 |
| * 2 | 2.35 | 6 |
| * 3 | 3.1 | 8 |
| * 4 | 3.9 | 10 |
| * 5 | 4.65 | 12 |
| * 6 | 5.4 | 14 |
| * 7 | 6.15 | 16 |
| * |
| * POR value for UFS_RESET HDRV is 3 which means |
| * 3.1mA and we want to use that. Hence just |
| * specify 8mA to "drive-strength" binding and |
| * that should result into writing 3 to HDRV |
| * field. |
| */ |
| drive-strength = <8>; /* default: 3.1 mA */ |
| output-low; /* active low reset */ |
| }; |
| }; |
| |
| ufs_dev_reset_deassert: ufs_dev_reset_deassert { |
| config { |
| pins = "ufs_reset"; |
| bias-pull-down; /* default: pull down */ |
| /* |
| * default: 3.1 mA |
| * check comments under ufs_dev_reset_assert |
| */ |
| drive-strength = <8>; |
| output-high; /* active low reset */ |
| }; |
| }; |
| }; |
| }; |