修改4g拨号为QMI,需要在系统里后台执行quectel-CM

hc

2024-10-22 8ac6c7a54ed1b98d142dce24b11c6de6a1e239a5

 kernel/drivers/firmware/efi/libstub/string.c
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@@ -6,6 +6,8 @@
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  *  Copyright (C) 1991, 1992  Linus Torvalds
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  */
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+#include <linux/ctype.h>
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+#include <linux/kernel.h>
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 #include <linux/types.h>
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 #include <linux/string.h>
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@@ -56,3 +58,58 @@
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 	return 0;
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 }
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 #endif
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+
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+/* Works only for digits and letters, but small and fast */
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+#define TOLOWER(x) ((x) | 0x20)
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+
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+static unsigned int simple_guess_base(const char *cp)
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+{
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+	if (cp[0] == '0') {
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+		if (TOLOWER(cp[1]) == 'x' && isxdigit(cp[2]))
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+			return 16;
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+		else
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+			return 8;
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+	} else {
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+		return 10;
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+	}
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+}
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+
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+/**
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+ * simple_strtoull - convert a string to an unsigned long long
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+ * @cp: The start of the string
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+ * @endp: A pointer to the end of the parsed string will be placed here
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+ * @base: The number base to use
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+ */
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+
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+unsigned long long simple_strtoull(const char *cp, char **endp, unsigned int base)
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+{
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+	unsigned long long result = 0;
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+
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+	if (!base)
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+		base = simple_guess_base(cp);
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+
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+	if (base == 16 && cp[0] == '0' && TOLOWER(cp[1]) == 'x')
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+		cp += 2;
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+
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+	while (isxdigit(*cp)) {
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+		unsigned int value;
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+
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+		value = isdigit(*cp) ? *cp - '0' : TOLOWER(*cp) - 'a' + 10;
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+		if (value >= base)
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+			break;
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+		result = result * base + value;
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+		cp++;
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+	}
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+	if (endp)
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+		*endp = (char *)cp;
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+
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+	return result;
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+}
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+
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+long simple_strtol(const char *cp, char **endp, unsigned int base)
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+{
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+	if (*cp == '-')
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+		return -simple_strtoull(cp + 1, endp, base);
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+
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+	return simple_strtoull(cp, endp, base);
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+}