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charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 22-02-28 14:11:49, Peng Fan (OSS) wrote: > From: Peng Fan > > Add mcore_booted boot parameter which could simplify AMP clock > management. To i.MX8M, there is CCM(clock control Module) to generate > clock root clock, anatop(analog PLL module) to generate PLL, and CCGR > (clock gating) to gate clocks to peripherals. As below: > anatop->ccm->ccgr->peripheral > > Linux handles the clock management and the auxiliary core is under > control of Linux. Although there is per hardware domain control for CCGR > and CCM, auxiliary core normally only use CCGR hardware domain control > to avoid linux gate off the clk to peripherals and leave CCM ana anatop > to Linux. > > Per NXP hardware design, because CCGR already support gate to > peripherals, and clk root gate power leakage is negligible. So > when in AMP case, we could not register the clk root gate. > > Signed-off-by: Peng Fan > --- > drivers/clk/imx/clk.c | 9 +++++++++ > drivers/clk/imx/clk.h | 1 + > 2 files changed, 10 insertions(+) > > diff --git a/drivers/clk/imx/clk.c b/drivers/clk/imx/clk.c > index 7cc669934253..5d3ac59b382b 100644 > --- a/drivers/clk/imx/clk.c > +++ b/drivers/clk/imx/clk.c > @@ -146,6 +146,15 @@ void imx_cscmr1_fixup(u32 *val) > return; > } > > +bool mcore_booted; > + > +static int __init setup_mcore_booted(char *booted) > +{ > + mcore_booted = true; > + return 1; > +} > +__setup("mcore_booted", setup_mcore_booted); Lets give module_param a try first, as discussed. Thanks. > + > #ifndef MODULE > > static bool imx_keep_uart_clocks; > diff --git a/drivers/clk/imx/clk.h b/drivers/clk/imx/clk.h > index a7cbbcd1a3f4..5061a06468df 100644 > --- a/drivers/clk/imx/clk.h > +++ b/drivers/clk/imx/clk.h > @@ -7,6 +7,7 @@ > #include > > extern spinlock_t imx_ccm_lock; > +extern bool mcore_booted; > > void imx_check_clocks(struct clk *clks[], unsigned int count); > void imx_check_clk_hws(struct clk_hw *clks[], unsigned int count); > -- > 2.25.1 > _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel