| Message ID | CACUGKYP68joryww1cDreWWd1t_1VmfoNyFb1o2JvekH12_O7iw@mail.gmail.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On Mon, Dec 16, 2013 at 05:40:18PM -0800, John Tobias wrote: > iMX6SL re-using iMX6Q driver in order to enable the cpu frequency > scaling and power management > > From: John Tobias <john.tobias.ph@gmail.com> > > > diff --git a/arch/arm/mach-imx/mach-imx6sl.c b/arch/arm/mach-imx/mach-imx6sl.c > index 2f952e3..e66eccf 100644 > --- a/arch/arm/mach-imx/mach-imx6sl.c > +++ b/arch/arm/mach-imx/mach-imx6sl.c > @@ -9,7 +9,10 @@ > > #include <linux/irqchip.h> > #include <linux/of.h> > +#include <linux/of_address.h> > +#include <linux/of_irq.h> > #include <linux/of_platform.h> > +#include <linux/pm_opp.h> > #include <linux/mfd/syscon.h> > #include <linux/mfd/syscon/imx6q-iomuxc-gpr.h> > #include <linux/regmap.h> > @@ -17,6 +20,7 @@ > #include <asm/mach/map.h> > > #include "common.h" > +#include "cpuidle.h" > > static void __init imx6sl_fec_init(void) > { > @@ -34,6 +38,47 @@ static void __init imx6sl_fec_init(void) > } > } > > + One blank line is enough. > +static void __init imx6sl_opp_init(void) > +{ > + struct device_node *np; > + struct device *cpu_dev = get_cpu_device(0); > + > + if (!cpu_dev) { > + pr_warn("failed to get cpu0 device\n"); > + return; > + } > + np = of_node_get(cpu_dev->of_node); > + if (!np) { > + pr_warn("failed to find cpu0 node\n"); > + return; > + } > + > + if (of_init_opp_table(cpu_dev)) { > + pr_warn("failed to init OPP table\n"); > + goto put_node; > + } > + > +put_node: > + of_node_put(np); > +} We have this for imx6q, because we need to check 1.2GHz case. But I hope we can improve imx6q-cpufreq driver to invoke of_init_opp_table() from there, if platform does not supply an opp table, so that we can save these code in platform for most of cases. > + > +static struct platform_device imx6q_cpufreq_pdev = { > + .name = "imx6q-cpufreq", > +}; > + > + > +static void __init imx6sl_init_late(void) > +{ > + /* re-use imx6q */ > + imx6q_cpuidle_init(); It's not about cpufreq. The change does not belong to this patch. > + > + if (IS_ENABLED(CONFIG_ARM_IMX6SQ_CPUFREQ)) { IMX6SQ? Shawn > + imx6sl_opp_init(); > + platform_device_register(&imx6q_cpufreq_pdev); > + } > +} > + > static void __init imx6sl_init_machine(void) > { > struct device *parent; > @@ -70,6 +115,7 @@ DT_MACHINE_START(IMX6SL, "Freescale i.MX6 SoloLite > (Device Tree)") > .map_io = debug_ll_io_init, > .init_irq = imx6sl_init_irq, > .init_machine = imx6sl_init_machine, > + .init_late = imx6sl_init_late, > .dt_compat = imx6sl_dt_compat, > .restart = mxc_restart, > MACHINE_END
diff --git a/arch/arm/mach-imx/mach-imx6sl.c b/arch/arm/mach-imx/mach-imx6sl.c index 2f952e3..e66eccf 100644 --- a/arch/arm/mach-imx/mach-imx6sl.c +++ b/arch/arm/mach-imx/mach-imx6sl.c @@ -9,7 +9,10 @@ #include <linux/irqchip.h> #include <linux/of.h> +#include <linux/of_address.h> +#include <linux/of_irq.h> #include <linux/of_platform.h> +#include <linux/pm_opp.h> #include <linux/mfd/syscon.h> #include <linux/mfd/syscon/imx6q-iomuxc-gpr.h> #include <linux/regmap.h> @@ -17,6 +20,7 @@ #include <asm/mach/map.h> #include "common.h" +#include "cpuidle.h" static void __init imx6sl_fec_init(void) { @@ -34,6 +38,47 @@ static void __init imx6sl_fec_init(void) } } + +static void __init imx6sl_opp_init(void) +{ + struct device_node *np; + struct device *cpu_dev = get_cpu_device(0); + + if (!cpu_dev) { + pr_warn("failed to get cpu0 device\n"); + return; + } + np = of_node_get(cpu_dev->of_node); + if (!np) { + pr_warn("failed to find cpu0 node\n"); + return; + } + + if (of_init_opp_table(cpu_dev)) { + pr_warn("failed to init OPP table\n"); + goto put_node; + } + +put_node: + of_node_put(np); +} + +static struct platform_device imx6q_cpufreq_pdev = { + .name = "imx6q-cpufreq", +}; + + +static void __init imx6sl_init_late(void) +{ + /* re-use imx6q */ + imx6q_cpuidle_init(); + + if (IS_ENABLED(CONFIG_ARM_IMX6SQ_CPUFREQ)) { + imx6sl_opp_init(); + platform_device_register(&imx6q_cpufreq_pdev); + } +} + static void __init imx6sl_init_machine(void) { struct device *parent; @@ -70,6 +115,7 @@ DT_MACHINE_START(IMX6SL, "Freescale i.MX6 SoloLite (Device Tree)") .map_io = debug_ll_io_init, .init_irq = imx6sl_init_irq, .init_machine = imx6sl_init_machine, + .init_late = imx6sl_init_late, .dt_compat = imx6sl_dt_compat, .restart = mxc_restart,
iMX6SL re-using iMX6Q driver in order to enable the cpu frequency scaling and power management From: John Tobias <john.tobias.ph@gmail.com> MACHINE_END