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| author | Valentin Longchamp <valentin.longchamp@epfl.ch> | 2009-11-03 20:09:47 +0300 |
|---|---|---|
| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2009-11-14 12:29:14 +0300 |
| commit | 421bf82e996826452ebe2011419f846a61950784 (patch) | |
| tree | f1261f7cba7fe0c4bcc354c1a3ed4a34d4c948ef /arch | |
| parent | 8963c49fdba293fbc21aee1bbae9afa99a52755f (diff) | |
| download | linux-421bf82e996826452ebe2011419f846a61950784.tar.xz | |
mx31moboard: serial port fix
We get rid of CTS/RTS lines on uart0 on our platform.
This is the port we use as main kernel console. We do not
want it to be blocking because of CTS/RTS signals, not allowing
the system to boot or print messages.
However we often use it with a bluetooth module needing CTS/RTS
lines as backup login in case of trouble. To be able to use it,
we assert CTS low so that the module can always send chars.
Signed-off-by: Valentin Longchamp <valentin.longchamp@epfl.ch>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/mach-mx3/mx31moboard.c | 20 |
1 files changed, 16 insertions, 4 deletions
diff --git a/arch/arm/mach-mx3/mx31moboard.c b/arch/arm/mach-mx3/mx31moboard.c index 9243de54041a..ff74fab34c85 100644 --- a/arch/arm/mach-mx3/mx31moboard.c +++ b/arch/arm/mach-mx3/mx31moboard.c @@ -45,8 +45,8 @@ static unsigned int moboard_pins[] = { /* UART0 */ - MX31_PIN_CTS1__CTS1, MX31_PIN_RTS1__RTS1, MX31_PIN_TXD1__TXD1, MX31_PIN_RXD1__RXD1, + MX31_PIN_CTS1__GPIO2_7, /* UART4 */ MX31_PIN_PC_RST__CTS5, MX31_PIN_PC_VS2__RTS5, MX31_PIN_PC_BVD2__TXD5, MX31_PIN_PC_BVD1__RXD5, @@ -101,7 +101,18 @@ static struct platform_device mx31moboard_flash = { .num_resources = 1, }; -static struct imxuart_platform_data uart_pdata = { +static int moboard_uart0_init(struct platform_device *pdev) +{ + gpio_request(IOMUX_TO_GPIO(MX31_PIN_CTS1), "uart0-cts-hack"); + gpio_direction_output(IOMUX_TO_GPIO(MX31_PIN_CTS1), 0); + return 0; +} + +static struct imxuart_platform_data uart0_pdata = { + .init = moboard_uart0_init, +}; + +static struct imxuart_platform_data uart4_pdata = { .flags = IMXUART_HAVE_RTSCTS, }; @@ -284,8 +295,9 @@ static void __init mxc_board_init(void) platform_add_devices(devices, ARRAY_SIZE(devices)); - mxc_register_device(&mxc_uart_device0, &uart_pdata); - mxc_register_device(&mxc_uart_device4, &uart_pdata); + mxc_register_device(&mxc_uart_device0, &uart0_pdata); + + mxc_register_device(&mxc_uart_device4, &uart4_pdata); mx31moboard_init_sel_gpios(); |