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Diffstat (limited to 'arch/powerpc/boot/treeboot-walnut.c')
-rw-r--r--arch/powerpc/boot/treeboot-walnut.c53
1 files changed, 2 insertions, 51 deletions
diff --git a/arch/powerpc/boot/treeboot-walnut.c b/arch/powerpc/boot/treeboot-walnut.c
index bb2c309d70fc..472e36605a52 100644
--- a/arch/powerpc/boot/treeboot-walnut.c
+++ b/arch/powerpc/boot/treeboot-walnut.c
@@ -20,55 +20,6 @@
20 20
21BSS_STACK(4096); 21BSS_STACK(4096);
22 22
23void ibm405gp_fixup_clocks(unsigned int sysclk, unsigned int ser_clk)
24{
25 u32 pllmr = mfdcr(DCRN_CPC0_PLLMR);
26 u32 cpc0_cr0 = mfdcr(DCRN_405_CPC0_CR0);
27 u32 cpc0_cr1 = mfdcr(DCRN_405_CPC0_CR1);
28 u32 cpu, plb, opb, ebc, tb, uart0, uart1, m;
29 u32 fwdv, fbdv, cbdv, opdv, epdv, udiv;
30
31 fwdv = (8 - ((pllmr & 0xe0000000) >> 29));
32 fbdv = (pllmr & 0x1e000000) >> 25;
33 cbdv = ((pllmr & 0x00060000) >> 17) + 1;
34 opdv = ((pllmr & 0x00018000) >> 15) + 1;
35 epdv = ((pllmr & 0x00001800) >> 13) + 2;
36 udiv = ((cpc0_cr0 & 0x3e) >> 1) + 1;
37
38 m = fwdv * fbdv * cbdv;
39
40 cpu = sysclk * m / fwdv;
41 plb = cpu / cbdv;
42 opb = plb / opdv;
43 ebc = plb / epdv;
44
45 if (cpc0_cr0 & 0x80) {
46 /* uart0 uses the external clock */
47 uart0 = ser_clk;
48 } else {
49 uart0 = cpu / udiv;
50 }
51
52 if (cpc0_cr0 & 0x40) {
53 /* uart1 uses the external clock */
54 uart1 = ser_clk;
55 } else {
56 uart1 = cpu / udiv;
57 }
58
59 /* setup the timebase clock to tick at the cpu frequency */
60 cpc0_cr1 = cpc0_cr1 & ~0x00800000;
61 mtdcr(DCRN_405_CPC0_CR1, cpc0_cr1);
62 tb = cpu;
63
64 dt_fixup_cpu_clocks(cpu, tb, 0);
65 dt_fixup_clock("/plb", plb);
66 dt_fixup_clock("/plb/opb", opb);
67 dt_fixup_clock("/plb/ebc", ebc);
68 dt_fixup_clock("/plb/opb/serial@ef600300", uart0);
69 dt_fixup_clock("/plb/opb/serial@ef600400", uart1);
70}
71
72static void walnut_flashsel_fixup(void) 23static void walnut_flashsel_fixup(void)
73{ 24{
74 void *devp, *sram; 25 void *devp, *sram;
@@ -112,7 +63,7 @@ static void walnut_flashsel_fixup(void)
112#define WALNUT_OPENBIOS_MAC_OFF 0xfffffe0b 63#define WALNUT_OPENBIOS_MAC_OFF 0xfffffe0b
113static void walnut_fixups(void) 64static void walnut_fixups(void)
114{ 65{
115 ibm4xx_fixup_memsize(); 66 ibm4xx_sdram_fixup_memsize();
116 ibm405gp_fixup_clocks(33330000, 0xa8c000); 67 ibm405gp_fixup_clocks(33330000, 0xa8c000);
117 ibm4xx_quiesce_eth((u32 *)0xef600800, NULL); 68 ibm4xx_quiesce_eth((u32 *)0xef600800, NULL);
118 ibm4xx_fixup_ebc_ranges("/plb/ebc"); 69 ibm4xx_fixup_ebc_ranges("/plb/ebc");
@@ -128,6 +79,6 @@ void platform_init(void)
128 simple_alloc_init(_end, avail_ram, 32, 32); 79 simple_alloc_init(_end, avail_ram, 32, 32);
129 platform_ops.fixups = walnut_fixups; 80 platform_ops.fixups = walnut_fixups;
130 platform_ops.exit = ibm40x_dbcr_reset; 81 platform_ops.exit = ibm40x_dbcr_reset;
131 ft_init(_dtb_start, _dtb_end - _dtb_start, 32); 82 fdt_init(_dtb_start);
132 serial_console_init(); 83 serial_console_init();
133} 84}