linux-kernel - [PATCH v4 11/11] da850: pruss CAN board specific additions.

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Message-Id: <1303474109-6212-12-git-send-email-subhasish@mistralsolutions.com>
Date:	Fri, 22 Apr 2011 17:38:29 +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@...com> (supporter:TI DAVINCI MACHIN...),
	Russell King <linux@....linux.org.uk> (maintainer:ARM PORT),
	linux-kernel@...r.kernel.org (open list)
Subject: [PATCH v4 11/11] da850: pruss CAN board specific additions.

This patch adds the pruss CAN pinmux and registers the device
with the pruss mfd driver.

Signed-off-by: Subhasish Ghosh <subhasish@...tralsolutions.com>
---
 arch/arm/mach-davinci/board-da850-evm.c |   46 +++++++++++++++++++++++++++++++
 1 files changed, 46 insertions(+), 0 deletions(-)

diff --git a/arch/arm/mach-davinci/board-da850-evm.c b/arch/arm/mach-davinci/board-da850-evm.c
index e7fdf31..e1ff18c 100644
--- a/arch/arm/mach-davinci/board-da850-evm.c
+++ b/arch/arm/mach-davinci/board-da850-evm.c
@@ -48,6 +48,7 @@
 
 #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)
 
@@ -1117,6 +1118,43 @@ static __init int da850_evm_init_cpufreq(void)
 static __init int da850_evm_init_cpufreq(void) { return 0; }
 #endif
 
+static const short da850_evm_pruss_can_pins[] = {
+	DA850_PRUSS_PRU0_R31_0, DA850_PRUSS_PRU1_R30_15,
+	DA850_PRUSS_PRU1_R31_18, DA850_GPIO2_0,
+	-1
+};
+
+static int __init da850_evm_pruss_can_setup(void)
+{
+	int ret, val = 0;
+	void __iomem *cfg_chip3_reg;
+
+	ret = davinci_cfg_reg_list(da850_evm_pruss_can_pins);
+	if (ret)
+		pr_warning("%s: da850_evm_pruss_can_pins mux setup "
+					"failed:%d\n", __func__, ret);
+	cfg_chip3_reg = DA8XX_SYSCFG0_VIRT(DA8XX_CFGCHIP3_REG);
+	val = __raw_readl(cfg_chip3_reg);
+	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;
+}
+
+static struct da850_evm_pruss_can_data can_data = {
+	.version	= 1,
+	.setup		= da850_evm_pruss_can_setup,
+};
+
+
 static const short da850_evm_pruss_suart_pins[] = {
 	DA850_AHCLKX, DA850_ACLKX, DA850_AFSX,
 	DA850_AHCLKR, DA850_ACLKR, DA850_AFSR,
@@ -1161,6 +1199,14 @@ static struct mfd_cell cell[] = {
 		.resources	= da850_evm_pruss_suart_resource,
 	},
 	{
+		.id		= 1,
+		.name		= "da8xx_pruss_can",
+		.platform_data	= &can_data,
+		.data_size	= sizeof(can_data),
+		.num_resources  = 0,
+		.resources	= NULL,
+	},
+	{
 		.name		= NULL,
 	},
 };
-- 
1.7.2.3

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