config CLK_AT91 bool "AT91 clock drivers" depends on CLK select MISC help This option is used to enable the AT91 clock driver. The driver supports the AT91 clock generator, including the oscillators and PLLs, such as main clock, slow clock, PLLA, UTMI PLL. Clocks can also be a source clock of other clocks a tree structure, such as master clock, usb device clock, matrix clock and generic clock. Devices can use a common clock API to request a particular clock, enable it and get its rate. config AT91_UTMI bool "Support UTMI PLL Clock" depends on CLK_AT91 select REGMAP select SPL_REGMAP if SPL_DM select SYSCON select SPL_SYSCON if SPL_DM help This option is used to enable the AT91 UTMI PLL clock driver. It is the clock provider of USB, and UPLLCK is the output of 480 MHz UTMI PLL, The souce clock of the UTMI PLL is the main clock, so the main clock must select the fast crystal oscillator to meet the frequency accuracy required by USB. config AT91_USB_CLK bool "Support USB OHCI Input Clock" depends on CLK_AT91 help This option is used to enable the USB Input Clock, from the device tree, configure the USBS bit (PLLA or UTMI PLL) and USBDIV field of the PMC_USB register. config AT91_H32MX bool "Support H32MX 32-bit Matrix Clock" depends on CLK_AT91 help This option is used to enable the AT91 H32MX matrixes clock driver. There are H64MX and H32MX matrixes clocks, H64MX 64-bit matrix clocks are MCK. The H32MX 32-bit matrix clock is to be configured as MCK if MCK does not exceed 83 MHz, else it is to be configured as MCK/2. config AT91_GENERIC_CLK bool "Support Generic Clock" depends on CLK_AT91 help This option is used to enable the AT91 generic clock driver. Some peripherals may need a second clock source that may be different from the system clock. This second clock is the generic clock (GCLK) and is managed by the PMC via PMC_PCR register. config AT91_SAM9X60_PLL bool "PLL support for SAM9X60 SoCs" depends on CLK_AT91 help This option is used to enable the AT91 SAM9X60's PLL clock driver.