diff options
| author | Kyösti Mälkki <kyosti.malkki@gmail.com> | 2015-05-11 20:58:18 +0300 |
|---|---|---|
| committer | Kyösti Mälkki <kyosti.malkki@gmail.com> | 2015-05-14 16:41:57 +0200 |
| commit | d22206ac796b747ad1e790e2dc44cdf8832d66e8 (patch) | |
| tree | ca3843e7b012f6cbcd21f9bcf3e7632a2d7655eb /src/superio | |
| parent | 0430c69918ea463d601a40aa3865245e56e8fa9c (diff) | |
superio/nct5104d: Handle shared GPIO/UART pins
Routing is decided based on enabled logical/virtual devices.
For a valid devicetree, one should have only one of SP3 and GPIO0,
and only one of SP4 and GPIO1, enabled at a time in configuration.
Change-Id: I02017786aba9dd22d12403aaa71d7641f5bbf997
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: http://review.coreboot.org/10177
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Edward O'Callaghan <edward.ocallaghan@koparo.com>
Diffstat (limited to 'src/superio')
| -rw-r--r-- | src/superio/nuvoton/nct5104d/superio.c | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/src/superio/nuvoton/nct5104d/superio.c b/src/superio/nuvoton/nct5104d/superio.c index f382c2c6be..01c1c2766d 100644 --- a/src/superio/nuvoton/nct5104d/superio.c +++ b/src/superio/nuvoton/nct5104d/superio.c @@ -81,6 +81,36 @@ static void set_irq_trigger_type(struct device *dev, bool trig_level) pnp_write_config(dev, GLOBAL_OPTION_CR26, reg26); } +static void route_pins_to_uart(struct device *dev, bool to_uart) +{ + u8 reg; + + reg = pnp_read_config(dev, 0x1c); + + switch (dev->path.pnp.device) { + case NCT5104D_SP3: + case NCT5104D_GPIO0: + /* Route pins 33 - 40. */ + if (to_uart) + reg |= (1 << 3); + else + reg &= ~(1 << 3); + break; + case NCT5104D_SP4: + case NCT5104D_GPIO1: + /* Route pins 41 - 48. */ + if (to_uart) + reg |= (1 << 2); + else + reg &= ~(1 << 2); + break; + default: + break; + } + + pnp_write_config(dev, 0x1c, reg); +} + static void nct5104d_init(struct device *dev) { struct superio_nuvoton_nct5104d_config *conf = dev->chip_info; @@ -93,10 +123,17 @@ static void nct5104d_init(struct device *dev) switch(dev->path.pnp.device) { case NCT5104D_SP1: case NCT5104D_SP2: + set_irq_trigger_type(dev, conf->irq_trigger_type != 0); + break; case NCT5104D_SP3: case NCT5104D_SP4: + route_pins_to_uart(dev, true); set_irq_trigger_type(dev, conf->irq_trigger_type != 0); break; + case NCT5104D_GPIO0: + case NCT5104D_GPIO1: + route_pins_to_uart(dev, false); + break; default: break; } |