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| author | Andy Shevchenko <andriy.shevchenko@linux.intel.com> | 2019-07-31 19:05:57 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-09-04 12:43:49 +0200 |
| commit | ef4e281ecccd5bc824a52a4b1e8fbdff3614c852 (patch) | |
| tree | c03988796f6b860864bf8819af32625090f7c48f /drivers/tty/serial/8250/8250_exar.c | |
| parent | serial: 8250_exar: No need to autoconfigure Exar ports (diff) | |
| download | linux-ef4e281ecccd5bc824a52a4b1e8fbdff3614c852.tar.xz linux-ef4e281ecccd5bc824a52a4b1e8fbdff3614c852.zip | |
serial: 8250_exar: Extract PM routine from 8250_port
There are Exar quirks in 8250_port which belong to 8250_exar module.
Extract PM routine to the correct module and do not contaminate generic code
with it.
Cc: Aaron Sierra <asierra@xes-inc.com>
Cc: Jan Kiszka <jan.kiszka@siemens.com>
Cc: Sudip Mukherjee <sudip.mukherjee@codethink.co.uk>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20190731170558.52897-2-andriy.shevchenko@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/serial/8250/8250_exar.c')
| -rw-r--r-- | drivers/tty/serial/8250/8250_exar.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/tty/serial/8250/8250_exar.c b/drivers/tty/serial/8250/8250_exar.c index 94212d9bf73f..1bf9adea2e61 100644 --- a/drivers/tty/serial/8250/8250_exar.c +++ b/drivers/tty/serial/8250/8250_exar.c @@ -36,6 +36,7 @@ #define UART_EXAR_INT0 0x80 #define UART_EXAR_8XMODE 0x88 /* 8X sampling rate select */ +#define UART_EXAR_SLEEP 0x8b /* Sleep mode */ #define UART_EXAR_DVID 0x8d /* Device identification */ #define UART_EXAR_FCTR 0x08 /* Feature Control Register */ @@ -128,6 +129,17 @@ struct exar8250 { int line[0]; }; +static void exar_pm(struct uart_port *port, unsigned int state, unsigned int old) +{ + /* + * Exar UARTs have a SLEEP register that enables or disables each UART + * to enter sleep mode separately. On the XR17V35x the register + * is accessible to each UART at the UART_EXAR_SLEEP offset, but + * the UART channel may only write to the corresponding bit. + */ + serial_port_out(port, UART_EXAR_SLEEP, state ? 0xff : 0); +} + static int default_setup(struct exar8250 *priv, struct pci_dev *pcidev, int idx, unsigned int offset, struct uart_8250_port *port) @@ -155,6 +167,8 @@ static int default_setup(struct exar8250 *priv, struct pci_dev *pcidev, port->port.type = PORT_XR17D15X; } + port->port.pm = exar_pm; + return 0; } |