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.
71 select HAVE_AT91_USB_CLK
72 select HAVE_AT91_H32MX
74 Select this if you are using one of Atmel's SAMA5D4 family SoC.
81 select COMMON_CLK_AT91
83 select GENERIC_CLOCKEVENTS
84 select HAVE_AT91_USB_CLK
90 select COMMON_CLK_AT91
92 select GENERIC_CLOCKEVENTS
94 select HAVE_AT91_USB_CLK
99 Select this if you are using one of those Atmel SoC:
116 endif # SOC_SAM_V4_V5
118 comment "AT91 Feature Selections"
120 config AT91_SLOW_CLOCK
121 bool "Suspend-to-RAM disables main oscillator"
125 Select this if you want Suspend-to-RAM to save the most power
126 possible (without powering off the CPU) by disabling the PLLs
127 and main oscillator so that only the 32 KiHz clock is available.
129 When only that slow-clock is available, some peripherals lose
130 functionality. Many can't issue wakeup events unless faster
131 clocks are available. Some lose their operating state and
132 need to be completely re-initialized.
135 int "Kernel HZ (jiffies per second)"
138 default "128" if SOC_AT91RM9200
141 On AT91rm9200 chips where you're using a system clock derived
142 from the 32768 Hz hardware clock, this tick rate should divide
143 it exactly: use a power-of-two value, such as 128 or 256, to
144 reduce timing errors caused by rounding.
146 On AT91sam926x chips, or otherwise when using a higher precision
147 system clock (of at least several MHz), rounding is less of a
148 problem so it can be safer to use a decimal values like 100.