linux-kernel - [PATCH v2 08/13] da850: pruss CAN board specific changes for gpios.

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Message-Id: <1297435892-28278-9-git-send-email-subhasish@mistralsolutions.com>
Date:	Fri, 11 Feb 2011 20:21:27 +0530
From:	Subhasish Ghosh <subhasish@...tralsolutions.com>
To:	davinci-linux-open-source@...ux.davincidsp.com
Cc:	linux-arm-kernel@...ts.infradead.org, m-watkins@...com,
	nsekhar@...com, sachi@...tralsolutions.com,
	Subhasish Ghosh <subhasish@...tralsolutions.com>,
	Kevin Hilman <khilman@...prootsystems.com> (supporter:TI DAVINCI
	MACHIN...),
	Russell King <linux@....linux.org.uk> (maintainer:ARM PORT),
	linux-kernel@...r.kernel.org (open list)
Subject: [PATCH v2 08/13] da850: pruss CAN board specific changes for gpios.

This patch adds the GPIO modifications required for the pruss CAN.

Signed-off-by: Subhasish Ghosh <subhasish@...tralsolutions.com>
---
 arch/arm/mach-davinci/board-da850-evm.c |   11 ++++++++++-
 1 files changed, 10 insertions(+), 1 deletions(-)

diff --git a/arch/arm/mach-davinci/board-da850-evm.c b/arch/arm/mach-davinci/board-da850-evm.c
index 2ce5536..f9c38f8 100644
--- a/arch/arm/mach-davinci/board-da850-evm.c
+++ b/arch/arm/mach-davinci/board-da850-evm.c
@@ -45,6 +45,7 @@
 
 #define DA850_MMCSD_CD_PIN		GPIO_TO_PIN(4, 0)
 #define DA850_MMCSD_WP_PIN		GPIO_TO_PIN(4, 1)
+#define DA850_PRUSS_CAN_TRX_PIN	GPIO_TO_PIN(2, 0)
 
 #define DA850_MII_MDIO_CLKEN_PIN	GPIO_TO_PIN(2, 6)
 
@@ -1055,7 +1056,7 @@ static __init int da850_evm_init_cpufreq(void) { return 0; }
 
 const short da850_evm_pruss_can_pins[] = {
 	DA850_PRUSS_PRU0_R31_0, DA850_PRUSS_PRU1_R30_15,
-	DA850_PRUSS_PRU1_R31_18,
+	DA850_PRUSS_PRU1_R31_18, DA850_GPIO2_0,
 	-1
 };
 
@@ -1073,6 +1074,14 @@ static int __init da850_evm_setup_pruss_can(void)
 	val |= BIT(3);
 	__raw_writel(val, cfg_chip3_reg);
 
+	/* value = 0 to enable the CAN transceiver */
+	ret = gpio_request_one(DA850_PRUSS_CAN_TRX_PIN,
+					GPIOF_OUT_INIT_LOW, "pruss_can_en");
+	if (ret) {
+		pr_warning("Cannot setup GPIO %d\n", DA850_PRUSS_CAN_TRX_PIN);
+		gpio_free(DA850_PRUSS_CAN_TRX_PIN);
+	}
+
 	return ret;
 }
 
-- 
1.7.2.3

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