driver: host_uart: Add host-uart device in npcx.
In order to prevent user turns on the pin-mux of devices has io-pads unexpectedly, this CL added a new device definition for host uart device. The pin-mux of host uart interface is enabled only if we set its status as "okay" in dts file of board folder. The following npcx7 drivers will meet: 1. Default status property of npcx devices with io-pads such as espi, pwm, uart, host uart and so on should be "disabled". 2. Switch pin-mux by changing status property to "okay" in dts file of board folder. Signed-off-by: Mulin Chao <mlchao@nuvoton.com>
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4 changed files with 25 additions and 14 deletions
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@ -25,7 +25,4 @@ config ESPI_PERIPHERAL_HOST_IO
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config ESPI_PERIPHERAL_DEBUG_PORT_80
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default y
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config ESPI_PERIPHERAL_UART
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default y
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endif #ESPI_NPCX
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@ -474,12 +474,6 @@
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interrupt-names = "kbc_ibf", "kbc_obe", "pmch_ibf",
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"pmch_obe", "p80_fifo";
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/* Host serial port pinmux PIN75 86 36 33 42 C7 B3 B2 */
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pinctrl-0 = <&altb_rxd_sl &altb_txd_sl
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&altb_rts_sl &altb_cts_sl
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&altb_ri_sl &altb_dtr_bout_sl
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&altb_dcd_sl &altb_dsr_sl>;
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/* WUI map for accessing host sub-modules */
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host_acc_wui = <&wui_host_acc>;
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@ -491,6 +485,17 @@
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<&pcc NPCX_CLOCK_BUS_APB3 NPCX_PWDWN_CTL5 7>;
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label = "HOST_SUBS";
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};
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host_uart: io_host_uart {
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compatible = "nuvoton,npcx-host-uart";
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/* Host serial port pinmux PIN75 86 36 33 42 C7 B3 B2 */
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pinctrl-0 = <&altb_rxd_sl &altb_txd_sl
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&altb_rts_sl &altb_cts_sl
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&altb_ri_sl &altb_dtr_bout_sl
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&altb_dcd_sl &altb_dsr_sl>;
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label = "HOST_UART_IO";
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status = "disabled";
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};
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};
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};
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@ -16,11 +16,6 @@ properties:
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required: true
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description: configurations of device source clock controller
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pinctrl-0:
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type: phandles
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required: true
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description: configurations of host uart pinmux controllers
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host_acc_wui:
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type: phandle
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required: true
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14
dts/bindings/espi/nuvoton,npcx-host-uart.yaml
Normal file
14
dts/bindings/espi/nuvoton,npcx-host-uart.yaml
Normal file
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@ -0,0 +1,14 @@
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# Copyright (c) 2020 Nuvoton Technology Corporation.
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# SPDX-License-Identifier: Apache-2.0
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description: Nuvoton, NPCX-Host UART IO node
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compatible: "nuvoton,npcx-host-uart"
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include: [base.yaml]
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properties:
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pinctrl-0:
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type: phandles
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required: true
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description: configurations of host uart pinmux controllers
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