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Commit d31fd43c authored by Carlo Caione's avatar Carlo Caione Committed by Stephen Boyd
Browse files

clk: x86: Do not gate clocks enabled by the firmware 



Read the enable register to determine if the clock is already in use by
the firmware. In this case avoid gating the clock.

Tested-by: default avatarEnric Balletbo i Serra <enric.balletbo@collabora.com>
Acked-by: default avatarAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: default avatarDarren Hart (VMware) <dvhart@infradead.org>
Signed-off-by: default avatarCarlo Caione <carlo@endlessm.com>
Fixes: 282a4e4c ("platform/x86: Enable Atom PMC platform clocks")
Signed-off-by: default avatarStephen Boyd <sboyd@codeaurora.org>
parent f905293d

drivers/clk/x86/clk-pmc-atom.c

+7 −0
Original line number Diff line number Diff line
@@ -186,6 +186,13 @@ static struct clk_plt *plt_clk_register(struct platform_device *pdev, int id, 
	pclk->reg = base + PMC_CLK_CTL_OFFSET + id * PMC_CLK_CTL_SIZE;

	spin_lock_init(&pclk->lock);



	/*

	 * If the clock was already enabled by the firmware mark it as critical

	 * to avoid it being gated by the clock framework if no driver owns it.

	 */

	if (plt_clk_is_enabled(&pclk->hw))

		init.flags |= CLK_IS_CRITICAL;



	ret = devm_clk_hw_register(&pdev->dev, &pclk->hw);

	if (ret) {

		pclk = ERR_PTR(ret);