Hi Fabrizio,
On Thu, Jan 25, 2018 at 7:02 PM, Fabrizio Castro
<fabrizio.castro@xxxxxxxxxxxxxx> wrote:
> This patch exposes a function to set the value of variable
> "shmobile_wdt_clock_status" so that the watchdog driver may communicate
> critical information to the SMP bring up assembly routine.
>
> Signed-off-by: Fabrizio Castro <fabrizio.castro@xxxxxxxxxxxxxx>
> Signed-off-by: Ramesh Shanmugasundaram <ramesh.shanmugasundaram@xxxxxxxxxxxxxx>
Thanks for your patch, but this is the part I don't like, as it calls into deep
platform code from a driver.
Some generic comments below...
> --- a/arch/arm/mach-shmobile/pm-rcar-gen2.c
> +++ b/arch/arm/mach-shmobile/pm-rcar-gen2.c
> @@ -50,6 +50,16 @@ static inline u32 phys_to_sbar(phys_addr_t addr)
> #define SYSCIER 0x0c
> #define SYSCIMR 0x10
>
> +static void __iomem *shmobile_boot_vector_start;
> +static unsigned long clock_status;
> +
> +void shmobile_set_wdt_clock_status(unsigned long value)
> +{
> + memcpy_toio(shmobile_boot_vector_start + clock_status,
> + &value, sizeof(value));
writel(shmobile_boot_vector_start + clock_status, value)?
> @@ -120,8 +130,12 @@ void __init rcar_gen2_pm_init(void)
> if (!p)
> return;
>
> + shmobile_boot_vector_start = p;
> + clock_status = (&shmobile_wdt_clock_status -
> + (unsigned long *)shmobile_boot_vector) *
> + sizeof(shmobile_wdt_clock_status);
clock_status = (unsigned long)shmobile_wdt_clock_status -
(unsigned long)shmobile_boot_vector?
> +
> memcpy_toio(p, shmobile_boot_vector, shmobile_boot_size);
> - iounmap(p);
>
> /* setup reset vectors */
> p = ioremap_nocache(RST, 0x63);
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
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