diff options
| author | Mark Kettenis <kettenis@cvs.openbsd.org> | 2019-10-06 16:18:17 +0000 |
|---|---|---|
| committer | Mark Kettenis <kettenis@cvs.openbsd.org> | 2019-10-06 16:18:17 +0000 |
| commit | 6b90b4ebe4788a3c98914d2e059f0e581939ecfb (patch) | |
| tree | 1e266df53d873da65e90ef9e14003d0207db2070 | |
| parent | 2156817a6fd154cbc3f14905800f83661bee2411 (diff) | |
Add support for i2c clock.
| -rw-r--r-- | sys/dev/fdt/amlclock.c | 36 |
1 files changed, 35 insertions, 1 deletions
diff --git a/sys/dev/fdt/amlclock.c b/sys/dev/fdt/amlclock.c index 05deadcb122..dd06a92052c 100644 --- a/sys/dev/fdt/amlclock.c +++ b/sys/dev/fdt/amlclock.c @@ -1,4 +1,4 @@ -/* $OpenBSD: amlclock.c,v 1.7 2019/10/04 20:01:59 kettenis Exp $ */ +/* $OpenBSD: amlclock.c,v 1.8 2019/10/06 16:18:16 kettenis Exp $ */ /* * Copyright (c) 2019 Mark Kettenis <kettenis@openbsd.org> * @@ -34,6 +34,9 @@ #define G12A_FCLK_DIV4 4 #define G12A_FCLK_DIV5 5 #define G12A_FCLK_DIV7 6 +#define G12A_MPLL1 12 +#define G12A_MPLL2 13 +#define G12A_I2C 24 #define G12A_SD_EMMC_A 33 #define G12A_SD_EMMC_B 34 #define G12A_SD_EMMC_C 35 @@ -55,6 +58,7 @@ #define HHI_PCIE_PLL_CNTL5 0x2b #define HHI_GCLK_MPEG0 0x50 #define HHI_GCLK_MPEG1 0x51 +#define HHI_MPEG_CLK_CNTL 0x5d #define HHI_SYS_CPU_CLK_CNTL0 0x67 #define HHI_SYS_CPU_CLK_DYN_ENABLE (1 << 26) #define HHI_SYS_CPU_CLK_MUX1_DIVN_TCNT(x) (((x) >> 20) & 0x3f) @@ -108,6 +112,7 @@ struct amlclock_gate { }; struct amlclock_gate aml_g12a_gates[] = { + [G12A_I2C] = { HHI_GCLK_MPEG0, 9 }, [G12A_SD_EMMC_A] = { HHI_GCLK_MPEG0, 24 }, [G12A_SD_EMMC_B] = { HHI_GCLK_MPEG0, 25 }, [G12A_SD_EMMC_C] = { HHI_GCLK_MPEG0, 26 }, @@ -426,6 +431,35 @@ amlclock_get_frequency(void *cookie, uint32_t *cells) case G12A_FCLK_DIV2P5: return 800000000; + case G12A_I2C: + reg = HREAD4(sc, HHI_MPEG_CLK_CNTL); + mux = (reg >> 12) & 0x7; + div = ((reg >> 0) & 0x7f) + 1; + switch (mux) { + case 0: + return sc->sc_xtal / div; + case 2: + idx = G12A_FCLK_DIV7; + break; + case 3: + idx = G12A_MPLL1; + break; + case 4: + idx = G12A_MPLL2; + break; + case 5: + idx = G12A_FCLK_DIV4; + break; + case 6: + idx = G12A_FCLK_DIV3; + break; + case 7: + idx = G12A_FCLK_DIV5; + break; + default: + goto fail; + } + return amlclock_get_frequency(sc, &idx) / div; case G12A_SD_EMMC_A_CLK0: reg = HREAD4(sc, HHI_SD_EMMC_CLK_CNTL); mux = (reg >> 9) & 0x7; |