Re: [PATCH 5/9] arm: twr-k70f120m: basic support for Kinetis TWR-K70F120M

Arnd Bergmann
2015-06-23T22:06:22Z

On Tuesday 23 June 2015 23:19:43 Paul Osmialowski wrote:
> @@ -1740,7 +1752,7 @@ source "mm/Kconfig"
> config FORCE_MAX_ZONEORDER
> int "Maximum zone order" if ARCH_SHMOBILE_LEGACY
> range 11 64 if ARCH_SHMOBILE_LEGACY
> - default "12" if SOC_AM33XX
> + default "12" if SOC_AM33XX || ARCH_KINETIS
> default "9" if SA1111 || ARCH_EFM32
> default "11"
> help

Put it in the defconfig?

> +#
> +
> +obj-$(CONFIG_MACH_KINETIS) += kinetis_platform.o

just use

obj-y += kinetis.o

> diff --git a/arch/arm/mach-kinetis/include/mach/idle.h b/arch/arm/mach-kinetis/include/mach/idle.h
> new file mode 100644
> index 0000000..0aafefd
> --- /dev/null
> +++ b/arch/arm/mach-kinetis/include/mach/idle.h

No mach/*.h files please.

> +/*
> + * This Kinetis port assumes that the CPU works in little-endian mode.
> + * Switching to big-endian will require different bit offsets in peripheral
> + * devices' registers. Also, some bit groups may lay on byte edges, so issue
> + * with big-endian cannot be fixed only by defining bit offsets differently
> + * for the big-endian mode.
> + */
> +#ifndef __LITTLE_ENDIAN
> +#error This Kinetis port assumes that the CPU works in little-endian mode
> +#endif

Fix the drivers instead?

> +/*
> + * Peripheral memory map
> + */
> +#define KINETIS_AIPS0PERIPH_BASE 0x40000000
> +#define KINETIS_AIPS1PERIPH_BASE 0x40080000

Move it into DT

> +/*
> + * System Integration Module (SIM) register map
> + *
> + * This map actually covers two hardware modules:
> + * 1. SIM low-power logic, at 0x40047000
> + * 2. System integration module (SIM), at 0x40048000
> + */
> +struct kinetis_sim_regs {
> + u32 sopt1; /* System Options Register 1 */
> + u32 rsv0[1024];
> + u32 sopt2; /* System Options Register 2 */
> + u32 rsv1;
> + u32 sopt4; /* System Options Register 4 */
> + u32 sopt5; /* System Options Register 5 */
> + u32 sopt6; /* System Options Register 6 */
> + u32 sopt7; /* System Options Register 7 */
> + u32 rsv2[2];
> + u32 sdid; /* System Device Identification Register */
> + u32 scgc[KINETIS_SIM_CG_NUMREGS]; /* Clock Gating Regs 1...7 */
> + u32 clkdiv1; /* System Clock Divider Register 1 */
> + u32 clkdiv2; /* System Clock Divider Register 2 */
> + u32 fcfg1; /* Flash Configuration Register 1 */
> + u32 fcfg2; /* Flash Configuration Register 2 */
> + u32 uidh; /* Unique Identification Register High */
> + u32 uidmh; /* Unique Identification Register Mid-High */
> + u32 uidml; /* Unique Identification Register Mid Low */
> + u32 uidl; /* Unique Identification Register Low */
> + u32 clkdiv3; /* System Clock Divider Register 3 */
> + u32 clkdiv4; /* System Clock Divider Register 4 */
> + u32 mcr; /* Misc Control Register */
> +};

Move it into the driver that uses these.

> +/*
> + * SIM registers base
> + */
> +#define KINETIS_SIM_BASE (KINETIS_AIPS0PERIPH_BASE + 0x00047000)
> +#define KINETIS_SIM_PTR(reg) \
> + (&(((struct kinetis_sim_regs *)(KINETIS_SIM_BASE))->reg))
> +#define KINETIS_SIM_RD(reg) readl_relaxed(KINETIS_SIM_PTR(reg))
> +#define KINETIS_SIM_WR(reg, val) writel_relaxed((val), KINETIS_SIM_PTR(reg))
> +#define KINETIS_SIM_SET(reg, mask) \
> + KINETIS_SIM_WR(reg, (KINETIS_SIM_RD(reg)) | (mask))
> +#define KINETIS_SIM_RESET(reg, mask) \
> + KINETIS_SIM_WR(reg, (KINETIS_SIM_RD(reg)) & (~(mask)))
> +#define KINETIS_SIM_ISSET(reg, mask) \
> + (KINETIS_SIM_RD(reg) & (mask))
> +
> +/*
> + * SIM registers
> + */
> +/*
> + * System Options Register 2
> + */
> +/* USB HS clock source select */
> +#define KINETIS_SIM_SOPT2_USBHSRC_BITS 2
> +#define KINETIS_SIM_SOPT2_USBHSRC_MSK (3 << KINETIS_SIM_SOPT2_USBHSRC_BITS)
> +#define KINETIS_SIM_SOPT2_USBHSRC_PLL0 (1 << KINETIS_SIM_SOPT2_USBHSRC_BITS)
> +#define KINETIS_SIM_SOPT2_USBHSRC_PLL1 (2 << KINETIS_SIM_SOPT2_USBHSRC_BITS)
> +
> +/* USB FS clock source select */
> +#define KINETIS_SIM_SOPT2_USBFSRC_BITS 22
> +#define KINETIS_SIM_SOPT2_USBFSRC_MSK (3 << KINETIS_SIM_SOPT2_USBFSRC_BITS)
> +#define KINETIS_SIM_SOPT2_USBFSRC_PLL0 (1 << KINETIS_SIM_SOPT2_USBFSRC_BITS)
> +#define KINETIS_SIM_SOPT2_USBFSRC_PLL1 (2 << KINETIS_SIM_SOPT2_USBFSRC_BITS)
> +#define KINETIS_SIM_SOPT2_USBF_CLKSEL (1 << 18)
> +

remove all these here.

> +/*
> + * Map required regions.
> + * This being the no-MMU Linux, I am not mapping anything
> + * since all I/O registers are available at their physical addresses.
> + */
> +static void __init kinetis_map_io(void)
> +{
> +}

Not needed, remove.

> +/*
> + * Freescale Kinetis platform initialization
> + */
> +static void __init kinetis_init(void)
> +{
> + of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
> +}

same here.

> diff --git a/arch/arm/tools/mach-types b/arch/arm/tools/mach-types
> index 2ed1b8a..1d05516 100644
> --- a/arch/arm/tools/mach-types
> +++ b/arch/arm/tools/mach-types
> @@ -554,6 +554,7 @@ smdk4412 MACH_SMDK4412 SMDK4412 3765
> marzen MACH_MARZEN MARZEN 3790
> krome MACH_KROME KROME 3797
> armadillo800eva MACH_ARMADILLO800EVA ARMADILLO800EVA 3863
> +kinetis MACH_KINETIS KINETIS 3896
> mx53_umobo MACH_MX53_UMOBO MX53_UMOBO 3927
> mt4 MACH_MT4 MT4 3981
> u8520 MACH_U8520 U8520 3990

Unused, please remove.

Arnd