linux-kernel - [PATCH] can : AM3517EVM : add platform specific init

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Date:	Thu, 10 Mar 2011 22:09:13 +0530
From:	Abhilash K V <abhilash.kv@...com>
To:	linux-omap@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Cc:	tony@...mide.com, linux@....linux.org.uk,
	Abhilash K V <abhilash.kv@...com>,
	Sriramakrishnan <srk@...com>
Subject: [PATCH] can : AM3517EVM : add platform specific init

CAN module on AM3517 requires programming of IO expander
as part of init sequence. Added transceiver_switch
callback to handle this.

Signed-off-by: Sriramakrishnan <srk@...com>
Reviewed-by:  Vaibhav Hiremath <hvaibhav@...com>
Signed-off-by: Abhilash K V <abhilash.kv@...com>
---
 arch/arm/mach-omap2/board-am3517evm.c |   18 ++++++++++++++++++
 1 files changed, 18 insertions(+), 0 deletions(-)

diff --git a/arch/arm/mach-omap2/board-am3517evm.c b/arch/arm/mach-omap2/board-am3517evm.c
index 2e4aad2..782d72d 100644
--- a/arch/arm/mach-omap2/board-am3517evm.c
+++ b/arch/arm/mach-omap2/board-am3517evm.c
@@ -734,6 +734,23 @@ static struct omap_board_mux board_mux[] __initdata = {
 };
 #endif
 
+/*
+ * HECC information
+ */
+
+#define CAN_STB         214
+static void hecc_phy_control(int on)
+{
+        int r;
+
+        r = gpio_request(CAN_STB, "can_stb");
+        if (r) {
+                printk(KERN_ERR "failed to get can_stb \n");
+                return;
+        }
+
+        gpio_direction_output(CAN_STB, (on==1)?0:1);
+}
 
 static struct resource am3517_hecc_resources[] = {
 	{
@@ -762,6 +779,7 @@ static struct ti_hecc_platform_data am3517_evm_hecc_pdata = {
 	.mbx_offset		= AM35XX_HECC_MBOX_OFFSET,
 	.int_line		= AM35XX_HECC_INT_LINE,
 	.version		= AM35XX_HECC_VERSION,
+	.transceiver_switch     = hecc_phy_control,
 };
 
 static void am3517_evm_hecc_init(struct ti_hecc_platform_data *pdata)
-- 
1.6.2.4

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