6 config HAVE_AT91_USB_CLK
16 config HAVE_AT91_H32MX
22 select COMMON_CLK_AT91
24 select GENERIC_CLOCKEVENTS
27 select PHYLIB if NETDEVICES
29 menu "Atmel AT91 System-on-Chip"
36 bool "ARM9 AT91SAM9/AT91RM9200"
38 Select this if you are using one of Atmel's AT91SAM9 or
44 Select this if you are using one of Atmel's SAMA5D3 SoC.
48 comment "Atmel AT91 Processor"
57 select HAVE_AT91_USB_CLK
59 Select this if you are using one of Atmel's SAMA5D3 family SoC.
60 This support covers SAMA5D31, SAMA5D33, SAMA5D34, SAMA5D35, SAMA5D36.
70 select HAVE_AT91_USB_CLK
71 select HAVE_AT91_H32MX
73 Select this if you are using one of Atmel's SAMA5D4 family SoC.
80 select COMMON_CLK_AT91
82 select GENERIC_CLOCKEVENTS
83 select HAVE_AT91_USB_CLK
89 select COMMON_CLK_AT91
91 select GENERIC_CLOCKEVENTS
93 select HAVE_AT91_USB_CLK
98 Select this if you are using one of those Atmel SoC:
115 endif # SOC_SAM_V4_V5
117 comment "AT91 Feature Selections"
119 config AT91_SLOW_CLOCK
120 bool "Suspend-to-RAM disables main oscillator"
124 Select this if you want Suspend-to-RAM to save the most power
125 possible (without powering off the CPU) by disabling the PLLs
126 and main oscillator so that only the 32 KiHz clock is available.
128 When only that slow-clock is available, some peripherals lose
129 functionality. Many can't issue wakeup events unless faster
130 clocks are available. Some lose their operating state and
131 need to be completely re-initialized.
134 int "Kernel HZ (jiffies per second)"
137 default "128" if SOC_AT91RM9200
140 On AT91rm9200 chips where you're using a system clock derived
141 from the 32768 Hz hardware clock, this tick rate should divide
142 it exactly: use a power-of-two value, such as 128 or 256, to
143 reduce timing errors caused by rounding.
145 On AT91sam926x chips, or otherwise when using a higher precision
146 system clock (of at least several MHz), rounding is less of a
147 problem so it can be safer to use a decimal values like 100.