xref: /openbmc/u-boot/drivers/clk/at91/Kconfig (revision cb686454)
1config CLK_AT91
2	bool "AT91 clock drivers"
3	depends on CLK
4	select MISC
5	help
6	  This option is used to enable the AT91 clock driver.
7	  The driver supports the AT91 clock generator, including
8	  the oscillators and PLLs, such as main clock, slow clock,
9	  PLLA, UTMI PLL. Clocks can also be a source clock of other
10	  clocks a tree structure, such as master clock, usb device
11	  clock, matrix clock and generic clock.
12	  Devices can use a common clock API to request a particular
13	  clock, enable it and get its rate.
14
15config AT91_UTMI
16	bool "Support UTMI PLL Clock"
17	depends on CLK_AT91
18	help
19	  This option is used to enable the AT91 UTMI PLL clock
20	  driver. It is the clock provider of USB, and UPLLCK is the
21	  output of 480 MHz UTMI PLL, The souce clock of the UTMI
22	  PLL is the main clock, so the main clock must select the
23	  fast crystal oscillator to meet the frequency accuracy
24	  required by USB.
25
26config AT91_H32MX
27	bool "Support H32MX 32-bit Matrix Clock"
28	depends on CLK_AT91
29	help
30	  This option is used to enable the AT91 H32MX matrixes
31	  clock driver. There are H64MX and H32MX matrixes clocks,
32	  H64MX 64-bit matrix clocks are MCK. The H32MX 32-bit
33	  matrix clock is to be configured as MCK if MCK does not
34	  exceed 83 MHz, else it is to be configured as MCK/2.
35
36config AT91_GENERIC_CLK
37	bool "Support Generic Clock"
38	depends on CLK_AT91
39	help
40	  This option is used to enable the AT91 generic clock
41	  driver. Some peripherals may need a second clock source
42	  that may be different from the system clock. This second
43	  clock is the generic clock (GCLK) and is managed by
44	  the PMC via PMC_PCR register.
45