RE: [PATCH v2 05/18] soc: imx: gpcv2: add domain option to keep domain clocks enabled
From: Peng Fan <peng.fan@nxp.com>
Date: 2021-08-05 09:39:00
Also in:
linux-arm-kernel
Subject: [PATCH v2 05/18] soc: imx: gpcv2: add domain option to keep domain clocks enabled Some of the MIX domains are using clocks to drive the bus bridges. Those must be enabled at all times, as long as the domain is powered up and they don't have any other consumer than the power domain. Add an option to keep the clocks attached to a domain enabled as long as the domain is power up and only disable them after the domain is powered down. Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Reviewed-by: Peng Fan <peng.fan@nxp.com>
quoted hunk ↗ jump to hunk
--- drivers/soc/imx/gpcv2.c | 14 +++++++++----- 1 file changed, 9 insertions(+), 5 deletions(-)diff --git a/drivers/soc/imx/gpcv2.c b/drivers/soc/imx/gpcv2.c index35f26f57d1ac..c3b1d2580963 100644--- a/drivers/soc/imx/gpcv2.c +++ b/drivers/soc/imx/gpcv2.c@@ -202,6 +202,7 @@ struct imx_pgc_domain { } bits; const int voltage; + const bool keep_clocks; struct device *dev; };@@ -295,7 +296,8 @@ static int imx_pgc_power_up(structgeneric_pm_domain *genpd) } /* Disable reset clocks for all devices in the domain */ - clk_bulk_disable_unprepare(domain->num_clks, domain->clks); + if (!domain->keep_clocks) + clk_bulk_disable_unprepare(domain->num_clks, domain->clks); return 0;@@ -317,10 +319,12 @@ static int imx_pgc_power_down(structgeneric_pm_domain *genpd) int ret; /* Enable reset clocks for all devices in the domain */ - ret = clk_bulk_prepare_enable(domain->num_clks, domain->clks); - if (ret) { - dev_err(domain->dev, "failed to enable reset clocks\n"); - return ret; + if (!domain->keep_clocks) { + ret = clk_bulk_prepare_enable(domain->num_clks, domain->clks); + if (ret) { + dev_err(domain->dev, "failed to enable reset clocks\n"); + return ret; + } } /* request the ADB400 to power down */ -- 2.30.2