On 2017-11-20 11:51, [email protected] wrote:
> From: Ruediger Fichter <[email protected]>
>
> Enable the clock gate of the debug console, even in the case it has been
> turned off i.e. because the root cell is not using the UART.
>
> Signed-off-by: Ruediger Fichter <[email protected]>
> Signed-off-by: Jan von Wiarda <[email protected]>
> ---
> hypervisor/arch/arm-common/uart-hscif.c | 4 ++++
> 1 file changed, 4 insertions(+)
>
> diff --git a/hypervisor/arch/arm-common/uart-hscif.c
> b/hypervisor/arch/arm-common/uart-hscif.c
> index 4eb7534..a3cab70 100644
> --- a/hypervisor/arch/arm-common/uart-hscif.c
> +++ b/hypervisor/arch/arm-common/uart-hscif.c
> @@ -30,8 +30,12 @@
>
> static void uart_init(struct uart_chip *chip)
> {
> + void *clock_reg = (void*)(unsigned long)chip->virt_clock_reg;
> + unsigned int gate_nr = chip->debug_console->gate_nr;
> u16 hsscr;
>
> + mmio_write32(clock_reg, mmio_read32(clock_reg) & ~(1 << gate_nr));
> +
> if (chip->debug_console->divider) {
> hsscr = mmio_read16(chip->virt_base + HSCIF_HSSCR);
> mmio_write16(chip->virt_base + HSCIF_HSSCR,
>
Merged, but I made the write conditional ("if (clock_reg)") because the
user may decide to not specify the register in the config and rather
rely on Linux having opened the gate.
Jan
--
Siemens AG, Corporate Technology, CT RDA ITP SES-DE
Corporate Competence Center Embedded Linux
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