On 2016-07-26 22:14, Greg Kroah-Hartman wrote:
> On Tue, Jul 26, 2016 at 09:50:37PM +0200, Jan Kiszka wrote:
>> Less magics that only require comments.
>>
>> Signed-off-by: Jan Kiszka <jan.kiszka@xxxxxxxxxxx>
>> ---
>> drivers/tty/serial/8250/8250_pci.c | 42 +++++++++++++++++++-------------------
>> include/uapi/linux/serial_reg.h | 13 ++++++++++++
>> 2 files changed, 34 insertions(+), 21 deletions(-)
>>
>> diff --git a/drivers/tty/serial/8250/8250_pci.c b/drivers/tty/serial/8250/8250_pci.c
>> index c1d4a8f..7f77060 100644
>> --- a/drivers/tty/serial/8250/8250_pci.c
>> +++ b/drivers/tty/serial/8250/8250_pci.c
>> @@ -1796,18 +1796,18 @@ pci_xr17v35x_setup(struct serial_private *priv,
>> * Setup Multipurpose Input/Output pins.
>> */
>> if (idx == 0) {
>> - writeb(0x00, p + 0x8f); /*MPIOINT[7:0]*/
>> - writeb(0x00, p + 0x90); /*MPIOLVL[7:0]*/
>> - writeb(0x00, p + 0x91); /*MPIO3T[7:0]*/
>> - writeb(0x00, p + 0x92); /*MPIOINV[7:0]*/
>> - writeb(0x00, p + 0x93); /*MPIOSEL[7:0]*/
>> - writeb(0x00, p + 0x94); /*MPIOOD[7:0]*/
>> - writeb(0x00, p + 0x95); /*MPIOINT[15:8]*/
>> - writeb(0x00, p + 0x96); /*MPIOLVL[15:8]*/
>> - writeb(0x00, p + 0x97); /*MPIO3T[15:8]*/
>> - writeb(0x00, p + 0x98); /*MPIOINV[15:8]*/
>> - writeb(0x00, p + 0x99); /*MPIOSEL[15:8]*/
>> - writeb(0x00, p + 0x9a); /*MPIOOD[15:8]*/
>> + writeb(0x00, p + UART_EXAR_MPIOINT_7_0);
>> + writeb(0x00, p + UART_EXAR_MPIOLVL_7_0);
>> + writeb(0x00, p + UART_EXAR_MPIO3T_7_0);
>> + writeb(0x00, p + UART_EXAR_MPIOINV_7_0);
>> + writeb(0x00, p + UART_EXAR_MPIOSEL_7_0);
>> + writeb(0x00, p + UART_EXAR_MPIOOD_7_0);
>> + writeb(0x00, p + UART_EXAR_MPIOINT_15_8);
>> + writeb(0x00, p + UART_EXAR_MPIOLVL_15_8);
>> + writeb(0x00, p + UART_EXAR_MPIO3T_15_8);
>> + writeb(0x00, p + UART_EXAR_MPIOINV_15_8);
>> + writeb(0x00, p + UART_EXAR_MPIOSEL_15_8);
>> + writeb(0x00, p + UART_EXAR_MPIOOD_15_8);
>> }
>> writeb(0x00, p + UART_EXAR_8XMODE);
>> writeb(UART_FCTR_EXAR_TRGD, p + UART_EXAR_FCTR);
>> @@ -1843,20 +1843,20 @@ pci_fastcom335_setup(struct serial_private *priv,
>> switch (priv->dev->device) {
>> case PCI_DEVICE_ID_COMMTECH_4222PCI335:
>> case PCI_DEVICE_ID_COMMTECH_4224PCI335:
>> - writeb(0x78, p + 0x90); /* MPIOLVL[7:0] */
>> - writeb(0x00, p + 0x92); /* MPIOINV[7:0] */
>> - writeb(0x00, p + 0x93); /* MPIOSEL[7:0] */
>> + writeb(0x78, p + UART_EXAR_MPIOLVL_7_0);
>> + writeb(0x00, p + UART_EXAR_MPIOINV_7_0);
>> + writeb(0x00, p + UART_EXAR_MPIOSEL_7_0);
>> break;
>> case PCI_DEVICE_ID_COMMTECH_2324PCI335:
>> case PCI_DEVICE_ID_COMMTECH_2328PCI335:
>> - writeb(0x00, p + 0x90); /* MPIOLVL[7:0] */
>> - writeb(0xc0, p + 0x92); /* MPIOINV[7:0] */
>> - writeb(0xc0, p + 0x93); /* MPIOSEL[7:0] */
>> + writeb(0x00, p + UART_EXAR_MPIOLVL_7_0);
>> + writeb(0xc0, p + UART_EXAR_MPIOINV_7_0);
>> + writeb(0xc0, p + UART_EXAR_MPIOSEL_7_0);
>> break;
>> }
>> - writeb(0x00, p + 0x8f); /* MPIOINT[7:0] */
>> - writeb(0x00, p + 0x91); /* MPIO3T[7:0] */
>> - writeb(0x00, p + 0x94); /* MPIOOD[7:0] */
>> + writeb(0x00, p + UART_EXAR_MPIOINT_7_0);
>> + writeb(0x00, p + UART_EXAR_MPIO3T_7_0);
>> + writeb(0x00, p + UART_EXAR_MPIOOD_7_0);
>> }
>> writeb(0x00, p + UART_EXAR_8XMODE);
>> writeb(UART_FCTR_EXAR_TRGD, p + UART_EXAR_FCTR);
>> diff --git a/include/uapi/linux/serial_reg.h b/include/uapi/linux/serial_reg.h
>> index 1e5ac4e7..d176448 100644
>> --- a/include/uapi/linux/serial_reg.h
>> +++ b/include/uapi/linux/serial_reg.h
>> @@ -376,5 +376,18 @@
>> #define UART_EXAR_TXTRG 0x0a /* Tx FIFO trigger level write-only */
>> #define UART_EXAR_RXTRG 0x0b /* Rx FIFO trigger level write-only */
>>
>> +#define UART_EXAR_MPIOINT_7_0 0x8f /* MPIOINT[7:0] */
>> +#define UART_EXAR_MPIOLVL_7_0 0x90 /* MPIOLVL[7:0] */
>> +#define UART_EXAR_MPIO3T_7_0 0x91 /* MPIO3T[7:0] */
>> +#define UART_EXAR_MPIOINV_7_0 0x92 /* MPIOINV[7:0] */
>> +#define UART_EXAR_MPIOSEL_7_0 0x93 /* MPIOSEL[7:0] */
>> +#define UART_EXAR_MPIOOD_7_0 0x94 /* MPIOOD[7:0] */
>> +#define UART_EXAR_MPIOINT_15_8 0x95 /* MPIOINT[15:8] */
>> +#define UART_EXAR_MPIOLVL_15_8 0x96 /* MPIOLVL[15:8] */
>> +#define UART_EXAR_MPIO3T_15_8 0x97 /* MPIO3T[15:8] */
>> +#define UART_EXAR_MPIOINV_15_8 0x98 /* MPIOINV[15:8] */
>> +#define UART_EXAR_MPIOSEL_15_8 0x99 /* MPIOSEL[15:8] */
>> +#define UART_EXAR_MPIOOD_15_8 0x9a /* MPIOOD[15:8] */
>> +
>
> Why are you putting these in a user api file? I know it matches the
> existing ones, but is this something that userspace really cares about?
Very valid question, and I was wondering the same. Maybe 95% of this
header is just lazy leftover from 607ca46e97.
I'm fine with starting off some include/linux/serial_reg.h, provided
someone gives me a hint what should be moved - I'm not very familiar
with the serial kernel ABI. Or I just start it off with those defines
above. You choose.
Jan
--
Siemens AG, Corporate Technology, CT RDA ITP SES-DE
Corporate Competence Center Embedded Linux
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