On Thu, Sep 12, 2019 at 01:55:50PM -0400, Jaret Cantu wrote:
> This adds watchdog support for the Fintek F81803 Super I/O chip.
>
> Testing was done on the Seneca XK-QUAD.
>
> Signed-off-by: Jaret Cantu <jaret.cantu@xxxxxxxxxxx>
Since there is no datasheet, we can only hope that this works
for other platforms using the same chip. Nothing we can do
about that, so
Reviewed-by: Guenter Roeck <linux@xxxxxxxxxxxx>
> ---
> drivers/watchdog/Kconfig | 4 ++--
> drivers/watchdog/f71808e_wdt.c | 17 ++++++++++++++++-
> 2 files changed, 18 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/watchdog/Kconfig b/drivers/watchdog/Kconfig
> index 8188963a405b..781ff835f2a4 100644
> --- a/drivers/watchdog/Kconfig
> +++ b/drivers/watchdog/Kconfig
> @@ -1046,8 +1046,8 @@ config F71808E_WDT
> depends on X86
> help
> This is the driver for the hardware watchdog on the Fintek F71808E,
> - F71862FG, F71868, F71869, F71882FG, F71889FG, F81865 and F81866
> - Super I/O controllers.
> + F71862FG, F71868, F71869, F71882FG, F71889FG, F81803, F81865, and
> + F81866 Super I/O controllers.
>
> You can compile this driver directly into the kernel, or use
> it as a module. The module will be called f71808e_wdt.
> diff --git a/drivers/watchdog/f71808e_wdt.c b/drivers/watchdog/f71808e_wdt.c
> index ff5cf1b48a4d..e46104c2fd94 100644
> --- a/drivers/watchdog/f71808e_wdt.c
> +++ b/drivers/watchdog/f71808e_wdt.c
> @@ -31,8 +31,10 @@
> #define SIO_REG_DEVID 0x20 /* Device ID (2 bytes) */
> #define SIO_REG_DEVREV 0x22 /* Device revision */
> #define SIO_REG_MANID 0x23 /* Fintek ID (2 bytes) */
> +#define SIO_REG_CLOCK_SEL 0x26 /* Clock select */
> #define SIO_REG_ROM_ADDR_SEL 0x27 /* ROM address select */
> #define SIO_F81866_REG_PORT_SEL 0x27 /* F81866 Multi-Function Register */
> +#define SIO_REG_TSI_LEVEL_SEL 0x28 /* TSI Level select */
> #define SIO_REG_MFUNCT1 0x29 /* Multi function select 1 */
> #define SIO_REG_MFUNCT2 0x2a /* Multi function select 2 */
> #define SIO_REG_MFUNCT3 0x2b /* Multi function select 3 */
> @@ -49,6 +51,7 @@
> #define SIO_F71869A_ID 0x1007 /* Chipset ID */
> #define SIO_F71882_ID 0x0541 /* Chipset ID */
> #define SIO_F71889_ID 0x0723 /* Chipset ID */
> +#define SIO_F81803_ID 0x1210 /* Chipset ID */
> #define SIO_F81865_ID 0x0704 /* Chipset ID */
> #define SIO_F81866_ID 0x1010 /* Chipset ID */
>
> @@ -108,7 +111,7 @@ MODULE_PARM_DESC(start_withtimeout, "Start watchdog timer on module load with"
> " given initial timeout. Zero (default) disables this feature.");
>
> enum chips { f71808fg, f71858fg, f71862fg, f71868, f71869, f71882fg, f71889fg,
> - f81865, f81866};
> + f81803, f81865, f81866};
>
> static const char *f71808e_names[] = {
> "f71808fg",
> @@ -118,6 +121,7 @@ static const char *f71808e_names[] = {
> "f71869",
> "f71882fg",
> "f71889fg",
> + "f81803",
> "f81865",
> "f81866",
> };
> @@ -370,6 +374,14 @@ static int watchdog_start(void)
> superio_inb(watchdog.sioaddr, SIO_REG_MFUNCT3) & 0xcf);
> break;
>
> + case f81803:
> + /* Enable TSI Level register bank */
> + superio_clear_bit(watchdog.sioaddr, SIO_REG_CLOCK_SEL, 3);
> + /* Set pin 27 to WDTRST# */
> + superio_outb(watchdog.sioaddr, SIO_REG_TSI_LEVEL_SEL, 0x5f &
> + superio_inb(watchdog.sioaddr, SIO_REG_TSI_LEVEL_SEL));
> + break;
> +
> case f81865:
> /* Set pin 70 to WDTRST# */
> superio_clear_bit(watchdog.sioaddr, SIO_REG_MFUNCT3, 5);
> @@ -809,6 +821,9 @@ static int __init f71808e_find(int sioaddr)
> /* Confirmed (by datasheet) not to have a watchdog. */
> err = -ENODEV;
> goto exit;
> + case SIO_F81803_ID:
> + watchdog.type = f81803;
> + break;
> case SIO_F81865_ID:
> watchdog.type = f81865;
> break;
> --
> 2.11.0
>
