bus: ti-sysc: Handle stdout-path for debug console
If we have stdout-path specified for earlycon, we must prevent the debug console from idling until runtime PM kicks in. Signed-off-by: Tony Lindgren <tony@atomide.com>
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Родитель
62020f2312
Коммит
3bb37c8e6e
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@ -206,6 +206,50 @@ static int sysc_parse_and_check_child_range(struct sysc *ddata)
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return 0;
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}
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static struct device_node *stdout_path;
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static void sysc_init_stdout_path(struct sysc *ddata)
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{
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struct device_node *np = NULL;
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const char *uart;
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if (IS_ERR(stdout_path))
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return;
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if (stdout_path)
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return;
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np = of_find_node_by_path("/chosen");
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if (!np)
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goto err;
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uart = of_get_property(np, "stdout-path", NULL);
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if (!uart)
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goto err;
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np = of_find_node_by_path(uart);
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if (!np)
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goto err;
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stdout_path = np;
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return;
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err:
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stdout_path = ERR_PTR(-ENODEV);
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}
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static void sysc_check_quirk_stdout(struct sysc *ddata,
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struct device_node *np)
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{
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sysc_init_stdout_path(ddata);
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if (np != stdout_path)
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return;
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ddata->cfg.quirks |= SYSC_QUIRK_NO_IDLE_ON_INIT |
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SYSC_QUIRK_NO_RESET_ON_INIT;
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}
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/**
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* sysc_check_one_child - check child configuration
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* @ddata: device driver data
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@ -224,6 +268,8 @@ static int sysc_check_one_child(struct sysc *ddata,
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if (name)
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dev_warn(ddata->dev, "really a child ti,hwmods property?");
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sysc_check_quirk_stdout(ddata, np);
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return 0;
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}
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