[U-Boot] [PATCH v2 2/2] mx: mx6: display max cpu frequency in print_cpuinfo()

Nikolay Dimitrov
2015-05-17T21:38:35Z

On 05/14/2015 08:08 AM, Tim Harvey wrote:
> Display the max CPU frequency as well as the current running CPU frequency
> if the max CPU frequency is available and differs from the current CPU
> frequency.
>
> Before:
> CPU: Freescale i.MX6Q rev1.2 at 792 MHz
>
> After - using an 800MHz IMX6DL (running at its max)
> CPU: Freescale i.MX6DL rev1.1 at 792 MHz
>
> After - using a 1GHz IMX6Q (not running at its max):
> CPU: Freescale i.MX6Q rev1.2 996 MHz (running at 792 MHz)
>
> Signed-off-by: Tim Harvey <tharvey@gateworks.com>
> ---
> v2:
> - split out from patch that obtains the max cpu freq
> - add before/after example and more description of change
>
> Signed-off-by: Tim Harvey <tharvey@gateworks.com>
> ---
> arch/arm/imx-common/cpu.c | 16 +++++++++++++++-
> 1 file changed, 15 insertions(+), 1 deletion(-)
>
> diff --git a/arch/arm/imx-common/cpu.c b/arch/arm/imx-common/cpu.c
> index 067d08f..6b20482 100644
> --- a/arch/arm/imx-common/cpu.c
> +++ b/arch/arm/imx-common/cpu.c
> @@ -142,7 +142,7 @@ const char *get_imx_type(u32 imxtype)
>
> int print_cpuinfo(void)
> {
> - u32 cpurev;
> + u32 cpurev, max_freq;
>
> #if defined(CONFIG_MX6) && defined(CONFIG_IMX6_THERMAL)
> struct udevice *thermal_dev;
> @@ -151,11 +151,25 @@ int print_cpuinfo(void)
>
> cpurev = get_cpu_rev();
>
> +#if defined(CONFIG_MX6)
> + printf("CPU: Freescale i.MX%s rev%d.%d",
> + get_imx_type((cpurev & 0xFF000) >> 12),
> + (cpurev & 0x000F0) >> 4,
> + (cpurev & 0x0000F) >> 0);
> + max_freq = get_cpu_speed_grade_hz();
> + if (!max_freq || max_freq == mxc_get_clock(MXC_ARM_CLK)) {
> + printf(" at %dMHz\n", mxc_get_clock(MXC_ARM_CLK) / 1000000);
> + } else {
> + printf(" %d MHz (running at %d MHz)\n", max_freq / 1000000,
> + mxc_get_clock(MXC_ARM_CLK) / 1000000);
> + }
> +#else
> printf("CPU: Freescale i.MX%s rev%d.%d at %d MHz\n",
> get_imx_type((cpurev & 0xFF000) >> 12),
> (cpurev & 0x000F0) >> 4,
> (cpurev & 0x0000F) >> 0,
> mxc_get_clock(MXC_ARM_CLK) / 1000000);
> +#endif
>
> #if defined(CONFIG_MX6) && defined(CONFIG_IMX6_THERMAL)
> ret = uclass_get_device(UCLASS_THERMAL, 0, &thermal_dev);
>

Tested-by: Nikolay Dimitrov <picmaster@mail.bg>

Regards,
Nikolay