diff options
| author | Peng Fan <peng.fan@nxp.com> | 2024-10-27 20:00:11 +0800 |
|---|---|---|
| committer | Abel Vesa <abel.vesa@linaro.org> | 2024-11-05 12:02:23 +0200 |
| commit | 92888f39193419c117e282cce7fd762ba78784a4 (patch) | |
| tree | 604962c39a4162d60f42e9602473fd413095c1b0 /drivers/clk/imx | |
| parent | e81361f6cf9bf4a1848b0813bc4becb2250870b8 (diff) | |
clk: imx: lpcg-scu: Skip HDMI LPCG clock save/restore
On i.MX8QM, HDMI LPCG clocks operation needs SCU clock "hdmi_ipg_clk"
to be ON. While during noirq suspend phase, "hdmi_ipg_clk" is disabled
by HDMI IRQ STEER driver, so SError will be triggered when accessing
the HDMI LPCG registers.
Skip all HDMI LPCG clocks save/restore to avoid SError during
system suspend/resume, it will NOT introduce additional power consumption
as their parent clock is disabled when suspend.
Signed-off-by: Peng Fan <peng.fan@nxp.com>
Link: https://lore.kernel.org/r/20241027-imx-clk-v1-v3-5-89152574d1d7@nxp.com
Signed-off-by: Abel Vesa <abel.vesa@linaro.org>
Diffstat (limited to 'drivers/clk/imx')
| -rw-r--r-- | drivers/clk/imx/clk-lpcg-scu.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/clk/imx/clk-lpcg-scu.c b/drivers/clk/imx/clk-lpcg-scu.c index 620afdf8dc03..6376557a3c3d 100644 --- a/drivers/clk/imx/clk-lpcg-scu.c +++ b/drivers/clk/imx/clk-lpcg-scu.c @@ -161,6 +161,9 @@ static int __maybe_unused imx_clk_lpcg_scu_suspend(struct device *dev) { struct clk_lpcg_scu *clk = dev_get_drvdata(dev); + if (!strncmp("hdmi_lpcg", clk_hw_get_name(&clk->hw), strlen("hdmi_lpcg"))) + return 0; + clk->state = readl_relaxed(clk->reg); dev_dbg(dev, "save lpcg state 0x%x\n", clk->state); @@ -171,6 +174,9 @@ static int __maybe_unused imx_clk_lpcg_scu_resume(struct device *dev) { struct clk_lpcg_scu *clk = dev_get_drvdata(dev); + if (!strncmp("hdmi_lpcg", clk_hw_get_name(&clk->hw), strlen("hdmi_lpcg"))) + return 0; + writel(clk->state, clk->reg); lpcg_e10858_writel(0, clk->reg, clk->state); dev_dbg(dev, "restore lpcg state 0x%x\n", clk->state); |