xref: /openbmc/u-boot/drivers/clk/at91/Kconfig (revision fa61ef6b4980dbc009e93baadbfcb1daa359d74b)
1 config 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 
15 config 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 
26 config 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 
36 config 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