This patch adds the GPIO modifications required for the pruss CAN.
Signed-off-by: Subhasish Ghosh <subhas...@mistralsolutions.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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