linux-kernel - [PATCH 10/15] power: reset: at91-reset: use r4 as tmp argument

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Date:   Tue, 21 Jan 2020 10:03:33 +0000
From:   <Claudiu.Beznea@...rochip.com>
To:     <sre@...nel.org>, <Nicolas.Ferre@...rochip.com>,
        <alexandre.belloni@...tlin.com>, <Ludovic.Desroches@...rochip.com>
CC:     <linux-pm@...r.kernel.org>, <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <Claudiu.Beznea@...rochip.com>
Subject: [PATCH 10/15] power: reset: at91-reset: use r4 as tmp argument

Use r4 as temporary register. On ARM r0-r3 should be used to hold
function arguments.

Signed-off-by: Claudiu Beznea <claudiu.beznea@...rochip.com>
---
 drivers/power/reset/at91-reset.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/power/reset/at91-reset.c b/drivers/power/reset/at91-reset.c
index dc48f6850796..3b1d566350f4 100644
--- a/drivers/power/reset/at91-reset.c
+++ b/drivers/power/reset/at91-reset.c
@@ -113,8 +113,8 @@ static int at91sam9g45_restart(struct notifier_block *this, unsigned long mode,
 		"beq	1f\n\t"
 
 		/* Then, test that the RAM controller is enabled */
-		"ldr	r0, [%1]\n\t"
-		"cmp	r0, #0\n\t"
+		"ldr	r4, [%1]\n\t"
+		"cmp	r4, #0\n\t"
 
 		/* Align to cache lines */
 		".balign 32\n\t"
@@ -138,7 +138,7 @@ static int at91sam9g45_restart(struct notifier_block *this, unsigned long mode,
 		  "r" (1),
 		  "r" cpu_to_le32(AT91_DDRSDRC_LPCB_POWER_DOWN),
 		  "r" (reset->args)
-		: "r0");
+		: "r4");
 
 	return NOTIFY_DONE;
 }
-- 
2.7.4