lkml.org 
[lkml]   [2011]   [Apr]   [22]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v4 11/11] da850: pruss CAN board specific additions.
Date
This patch adds the pruss CAN pinmux and registers the device
with the pruss mfd driver.

Signed-off-by: Subhasish Ghosh <subhasish@mistralsolutions.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


\
 
 \ /
  Last update: 2011-04-22 13:53    [W:1.075 / U:0.064 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site