diff options
| author | Dong Aisheng <b29396@freescale.com> | 2014-09-25 15:12:00 +0800 |
|---|---|---|
| committer | Dong Aisheng <b29396@freescale.com> | 2015-01-21 18:23:13 +0800 |
| commit | bd24cd2dbedaecc6c3d68e1b3bee4f5632ae84c8 (patch) | |
| tree | 6348fe403ef0abd76c072155fc6ac82cc97437bb | |
| parent | 5319ce35e07d675302e01f632a0008803b53d3ae (diff) | |
ENGR00333130-1 ARM: imx6sx: setting can trx according to gpio flags
With this, we can pass the gpio active flag from device tree
for initialize the transceiver.
Signed-off-by: Dong Aisheng <b29396@freescale.com>
(cherry picked from commit 1847de083ac1dd0f0e150cc65ea1460baf362656)
(cherry picked from commit fde505aab652a8575f3c27a018697df34831edc3)
| -rwxr-xr-x | arch/arm/mach-imx/mach-imx6sx.c | 32 |
1 files changed, 23 insertions, 9 deletions
diff --git a/arch/arm/mach-imx/mach-imx6sx.c b/arch/arm/mach-imx/mach-imx6sx.c index 33a1d937a9fe..038927688970 100755 --- a/arch/arm/mach-imx/mach-imx6sx.c +++ b/arch/arm/mach-imx/mach-imx6sx.c @@ -1,5 +1,5 @@ /* - * Copyright (C) 2014 Freescale Semiconductor, Inc. + * Copyright (C) 2014-2015 Freescale Semiconductor, Inc. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as @@ -27,7 +27,9 @@ static struct fec_platform_data fec_pdata[2]; static struct flexcan_platform_data flexcan_pdata[2]; static int flexcan_en_gpio; +static int flexcan_en_active_high; static int flexcan_stby_gpio; +static int flexcan_stby_active_high; static int flexcan0_en; static int flexcan1_en; @@ -80,18 +82,24 @@ static void __init imx6sx_enet_plt_init(void) static void mx6sx_flexcan_switch(void) { if (flexcan0_en || flexcan1_en) { - gpio_set_value_cansleep(flexcan_en_gpio, 0); - gpio_set_value_cansleep(flexcan_stby_gpio, 0); - gpio_set_value_cansleep(flexcan_en_gpio, 1); - gpio_set_value_cansleep(flexcan_stby_gpio, 1); + gpio_set_value_cansleep(flexcan_en_gpio, + !flexcan_en_active_high); + gpio_set_value_cansleep(flexcan_stby_gpio, + !flexcan_stby_active_high); + gpio_set_value_cansleep(flexcan_en_gpio, + flexcan_en_active_high); + gpio_set_value_cansleep(flexcan_stby_gpio, + flexcan_stby_active_high); } else { /* * avoid to disable CAN xcvr if any of the CAN interfaces * are down. XCRV will be disabled only if both CAN2 * interfaces are DOWN. */ - gpio_set_value_cansleep(flexcan_en_gpio, 0); - gpio_set_value_cansleep(flexcan_stby_gpio, 0); + gpio_set_value_cansleep(flexcan_en_gpio, + !flexcan_en_active_high); + gpio_set_value_cansleep(flexcan_stby_gpio, + !flexcan_stby_active_high); } } @@ -110,20 +118,26 @@ static void imx6sx_arm2_flexcan1_switch(int enable) static int __init imx6sx_arm2_flexcan_fixup(void) { struct device_node *np; + enum of_gpio_flags en_flags, stby_flags; bool canfd_en = false; np = of_find_node_by_path("/soc/aips-bus@02000000/can@02090000"); if (!np) return -ENODEV; - flexcan_en_gpio = of_get_named_gpio(np, "trx-en-gpio", 0); - flexcan_stby_gpio = of_get_named_gpio(np, "trx-stby-gpio", 0); + flexcan_en_gpio = of_get_named_gpio_flags(np, "trx-en-gpio", 0, &en_flags); + flexcan_stby_gpio = of_get_named_gpio_flags(np, "trx-stby-gpio", 0, &stby_flags); if (gpio_is_valid(flexcan_en_gpio) && gpio_is_valid(flexcan_stby_gpio) && !gpio_request_one(flexcan_en_gpio, GPIOF_DIR_OUT, "flexcan-trx-en") && !gpio_request_one(flexcan_stby_gpio, GPIOF_DIR_OUT, "flexcan-trx-stby")) { /* flexcan 0 & 1 are using the same GPIOs for transceiver */ flexcan_pdata[0].transceiver_switch = imx6sx_arm2_flexcan0_switch; flexcan_pdata[1].transceiver_switch = imx6sx_arm2_flexcan1_switch; + if (!(en_flags & OF_GPIO_ACTIVE_LOW)) + flexcan_en_active_high = 1; + + if (!(stby_flags & OF_GPIO_ACTIVE_LOW)) + flexcan_stby_active_high = 1; } /* |