From mboxrd@z Thu Jan 1 00:00:00 1970 From: subhasish@mistralsolutions.com (Subhasish Ghosh) Date: Tue, 1 Feb 2011 20:17:46 +0530 Subject: [PATCH v1 8/9] da850: pruss CAN board specific changes for gpios. In-Reply-To: <1296571667-12049-1-git-send-email-subhasish@mistralsolutions.com> References: <1296571667-12049-1-git-send-email-subhasish@mistralsolutions.com> Message-ID: <1296571667-12049-9-git-send-email-subhasish@mistralsolutions.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org This patch adds the GPIO modifications required for the pruss CAN. Signed-off-by: Subhasish Ghosh --- 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 285545f..737df73 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_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 }; @@ -1076,6 +1077,14 @@ static int __init da850_evm_setup_pruss_can(void) val |= BIT(3); __raw_writel(val, cfg_chip3_base); + /* 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