linux-kernel - [PATCH 1/2] MIPS: BCM63xx: add helper function to detect CFE

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Message-Id: <20200608094053.3381512-2-noltari@gmail.com>
Date:   Mon,  8 Jun 2020 11:40:52 +0200
From:   Álvaro Fernández Rojas 
        <noltari@...il.com>
To:     tsbogend@...ha.franken.de, f.fainelli@...il.com,
        bcm-kernel-feedback-list@...adcom.com, miquel.raynal@...tlin.com,
        richard@....at, vigneshr@...com, jonas.gorski@...il.com,
        linus.walleij@...aro.org, linux-mips@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-mtd@...ts.infradead.org
Cc:     Álvaro Fernández Rojas 
        <noltari@...il.com>
Subject: [PATCH 1/2] MIPS: BCM63xx: add helper function to detect CFE

CFE passes argument 3 as "CFE1".

Signed-off-by: Álvaro Fernández Rojas <noltari@...il.com>
Signed-off-by: Jonas Gorski <jonas.gorski@...il.com>
---
 arch/mips/include/asm/mach-bcm63xx/bcm63xx_board.h | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/arch/mips/include/asm/mach-bcm63xx/bcm63xx_board.h b/arch/mips/include/asm/mach-bcm63xx/bcm63xx_board.h
index 1d19a726f86c..5af07796e8c7 100644
--- a/arch/mips/include/asm/mach-bcm63xx/bcm63xx_board.h
+++ b/arch/mips/include/asm/mach-bcm63xx/bcm63xx_board.h
@@ -2,6 +2,8 @@
 #ifndef BCM63XX_BOARD_H_
 #define BCM63XX_BOARD_H_
 
+#include <asm/bootinfo.h>
+
 const char *board_get_name(void);
 
 void board_prom_init(void);
@@ -10,4 +12,8 @@ void board_setup(void);
 
 int board_register_devices(void);
 
+static inline bool bcm63xx_is_cfe_present(void) {
+	return fw_arg3 == 0x43464531;
+}
+
 #endif /* ! BCM63XX_BOARD_H_ */
-- 
2.26.2