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hw/ppc/mpc8544_guts: Populate POR PLL ratio status register

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Populate this read-only register with some arbitrary values which avoids
U-Boot's get_clocks() to hang().

Reviewed-by: BALATON Zoltan <balaton@eik.bme.hu>
Signed-off-by: Bernhard Beschow <shentey@gmail.com>
Message-ID: <20241103133412.73536-11-shentey@gmail.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
This commit is contained in:
Bernhard Beschow 2024-11-03 14:33:56 +01:00 committed by Philippe Mathieu-Daudé
parent b5d65592d9
commit 6b0cc65828
1 changed files with 12 additions and 0 deletions
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12
hw/ppc/mpc8544_guts.c
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@ -29,6 +29,12 @@
#define MPC8544_GUTS_RSTCR_RESET 0x02
#define MPC8544_GUTS_ADDR_PORPLLSR 0x00
REG32(GUTS_PORPLLSR, 0x00)
FIELD(GUTS_PORPLLSR, E500_1_RATIO, 24, 6)
FIELD(GUTS_PORPLLSR, E500_0_RATIO, 16, 6)
FIELD(GUTS_PORPLLSR, DDR_RATIO, 9, 5)
FIELD(GUTS_PORPLLSR, PLAT_RATIO, 1, 5)
#define MPC8544_GUTS_ADDR_PORBMSR 0x04
#define MPC8544_GUTS_ADDR_PORIMPSCR 0x08
#define MPC8544_GUTS_ADDR_PORDEVSR 0x0C
@ -75,6 +81,12 @@ static uint64_t mpc8544_guts_read(void *opaque, hwaddr addr,
addr &= MPC8544_GUTS_MMIO_SIZE - 1;
switch (addr) {
case MPC8544_GUTS_ADDR_PORPLLSR:
value = FIELD_DP32(value, GUTS_PORPLLSR, E500_1_RATIO, 6); /* 3:1 */
value = FIELD_DP32(value, GUTS_PORPLLSR, E500_0_RATIO, 6); /* 3:1 */
value = FIELD_DP32(value, GUTS_PORPLLSR, DDR_RATIO, 12); /* 12:1 */
value = FIELD_DP32(value, GUTS_PORPLLSR, PLAT_RATIO, 6); /* 6:1 */
break;
case MPC8544_GUTS_ADDR_PVR:
value = env->spr[SPR_PVR];
break;