Searched hist:"6904 d7e5" (Results 1 – 1 of 1) sorted by relevance
| /openbmc/linux/drivers/clk/samsung/ |
| H A D | clk-exynos850.c | 6904d7e5 Sun Nov 21 17:27:41 CST 2021 Sam Protsenko <semen.protsenko@linaro.org> clk: samsung: exynos850: Keep some crucial clocks running
Some clocks shouldn't be automatically disabled in clk_disable_unused(),
otherwise kernel hangs. Mark those clocks with:
- CLK_IS_CRITICAL flag, when there won't be any consumers for that
clock, but system can't function when it's gated
- CLK_IGNORE_UNUSED flag, when consumer driver will be probably added
later
That makes it possible to run the kernel without passing the
"clk_ignore_unused" param.
Next clocks were modified:
- "gout_dpu_cmu_dpu_pclk": CLK_IGNORE_UNUSED
Will be enabled later in DSIM driver (Display Serial Interface
Master).
- "gout_gpio_peri_pclk": CLK_IGNORE_UNUSED
"gout_gpio_cmgp_pclk": CLK_IGNORE_UNUSED
"gout_gpio_hsi_pclk": CLK_IGNORE_UNUSED
Should be probably enabled in corresponding GPIO driver later, or
made CLK_IS_CRITICAL. "gout_gpio_peri_clk" is actually used by LEDs
on Exynos850-based dev board, so kernel hangs if this clock is not
running. Other clocks were marked as "ignore unused" to prevent
similar issues for other use cases or boards that might be added
later.
- "gout_cci_aclk": CLK_IS_CRITICAL
CCI (Cache Coherent Interconnect): obviously is critical.
- "gout_gic_clk": CLK_IS_CRITICAL
GIC (Generic Interrupt Controller): obviously is critical.
Signed-off-by: Sam Protsenko <semen.protsenko@linaro.org>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Link: https://lore.kernel.org/r/20211121232741.6967-7-semen.protsenko@linaro.org
|