+Leonard, in case he wants to have a look. One small comment below ... On Fri, Jun 09, 2017 at 04:07:35PM +0200, Oleksij Rempel wrote: > One of the Freescale recommended sequences for power off with external > PMIC is the following: > ... > 3. SoC is programming PMIC for power off when standby is asserted. > 4. In CCM STOP mode, Standby is asserted, PMIC gates SoC supplies. > > See: > http://www.nxp.com/assets/documents/data/en/reference-manuals/IMX6DQRM.pdf > page 5083 > > This patch implements step 4. of this sequence. > > Signed-off-by: Oleksij Rempel <o.rempel@xxxxxxxxxxxxxx> > --- > arch/arm/mach-imx/pm-imx6.c | 27 +++++++++++++++++++++++++++ > 1 file changed, 27 insertions(+) > > diff --git a/arch/arm/mach-imx/pm-imx6.c b/arch/arm/mach-imx/pm-imx6.c > index e61b1d1027e1..3a4f8f289f4d 100644 > --- a/arch/arm/mach-imx/pm-imx6.c > +++ b/arch/arm/mach-imx/pm-imx6.c > @@ -27,6 +27,8 @@ > #include <asm/proc-fns.h> > #include <asm/suspend.h> > #include <asm/tlb.h> > +#include <linux/kallsyms.h> > +#include <linux/regulator/machine.h> How are these headers used? Shawn > > #include "common.h" > #include "hardware.h" > @@ -602,6 +604,28 @@ static void __init imx6_pm_common_init(const struct imx6_pm_socdata > IMX6Q_GPR1_GINT); > } > > +static void imx6_pm_poweroff(void) > +{ > + imx6_set_lpm(STOP_POWER_OFF); > + cpu_suspend(0, imx6q_suspend_finish); > + > + mdelay(1000); > + > + pr_emerg("Unable to poweroff system\n"); > +} > + > +static int imx6_pm_poweroff_probe(void) > +{ > + if (pm_power_off) { > + pr_warn("%s: pm_power_off already claimed %p %pf!\n", > + __func__, pm_power_off, pm_power_off); > + return -EBUSY; > + } > + > + pm_power_off = imx6_pm_poweroff; > + return 0; > +} > + > void __init imx6_pm_ccm_init(const char *ccm_compat) > { > struct device_node *np; > @@ -618,6 +642,9 @@ void __init imx6_pm_ccm_init(const char *ccm_compat) > val = readl_relaxed(ccm_base + CLPCR); > val &= ~BM_CLPCR_LPM; > writel_relaxed(val, ccm_base + CLPCR); > + > + if (of_property_read_bool(np, "fsl,pmic-stby-poweroff")) > + imx6_pm_poweroff_probe(); > } > > void __init imx6q_pm_init(void) > -- > 2.11.0 > -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
