diff options
| author | Magnus Damm <damm@opensource.se> | 2009-11-27 12:28:03 +0300 |
|---|---|---|
| committer | Paul Mundt <lethal@linux-sh.org> | 2009-11-30 06:02:55 +0300 |
| commit | e6d8460aca6311d7ab5371b59dc999bb4d714444 (patch) | |
| tree | f06e509b47d6b02f4b0ef362491c887bca8d69ae /arch/sh/boards | |
| parent | fae4339919c741f89f7e293b8c646207e1df28e1 (diff) | |
| download | linux-e6d8460aca6311d7ab5371b59dc999bb4d714444.tar.xz | |
sh: Improve kfr2r09 serial port setup code
This patch improves the serial port communication quality
of port YC401 on the KFR2R09 board. With this fix serial
console is fine at 115200 - up and down keys now work as
expected. Thanks to Hirohide Yamasaki for this fix.
Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'arch/sh/boards')
| -rw-r--r-- | arch/sh/boards/mach-kfr2r09/setup.c | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/arch/sh/boards/mach-kfr2r09/setup.c b/arch/sh/boards/mach-kfr2r09/setup.c index e755bad6dc15..87438d6603d6 100644 --- a/arch/sh/boards/mach-kfr2r09/setup.c +++ b/arch/sh/boards/mach-kfr2r09/setup.c @@ -414,11 +414,59 @@ static int kfr2r09_usb0_gadget_i2c_setup(void) return 0; } + +static int kfr2r09_serial_i2c_setup(void) +{ + struct i2c_adapter *a; + struct i2c_msg msg; + unsigned char buf[2]; + int ret; + + a = i2c_get_adapter(0); + if (!a) + return -ENODEV; + + /* set bit 6 (the 7th bit) of chip at 0x09, register 0x13 */ + buf[0] = 0x13; + msg.addr = 0x09; + msg.buf = buf; + msg.len = 1; + msg.flags = 0; + ret = i2c_transfer(a, &msg, 1); + if (ret != 1) + return -ENODEV; + + buf[0] = 0; + msg.addr = 0x09; + msg.buf = buf; + msg.len = 1; + msg.flags = I2C_M_RD; + ret = i2c_transfer(a, &msg, 1); + if (ret != 1) + return -ENODEV; + + buf[1] = buf[0] | (1 << 6); + buf[0] = 0x13; + msg.addr = 0x09; + msg.buf = buf; + msg.len = 2; + msg.flags = 0; + ret = i2c_transfer(a, &msg, 1); + if (ret != 1) + return -ENODEV; + + return 0; +} #else static int kfr2r09_usb0_gadget_i2c_setup(void) { return -ENODEV; } + +static int kfr2r09_serial_i2c_setup(void) +{ + return -ENODEV; +} #endif static int kfr2r09_usb0_gadget_setup(void) @@ -463,6 +511,9 @@ static int __init kfr2r09_devices_setup(void) /* enable SCIF1 serial port for YC401 console support */ gpio_request(GPIO_FN_SCIF1_RXD, NULL); gpio_request(GPIO_FN_SCIF1_TXD, NULL); + kfr2r09_serial_i2c_setup(); /* ECONTMSK(bit6=L10ONEN) set 1 */ + gpio_request(GPIO_PTG3, NULL); /* HPON_ON */ + gpio_direction_output(GPIO_PTG3, 1); /* HPON_ON = H */ /* setup NOR flash at CS0 */ ctrl_outl(0x36db0400, BSC_CS0BCR); |