diff options
Diffstat (limited to 'sys/dev/fdt/sxiccmu.c')
| -rw-r--r-- | sys/dev/fdt/sxiccmu.c | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/sys/dev/fdt/sxiccmu.c b/sys/dev/fdt/sxiccmu.c index b27a6408ae9..140473537fa 100644 --- a/sys/dev/fdt/sxiccmu.c +++ b/sys/dev/fdt/sxiccmu.c @@ -1,4 +1,4 @@ -/* $OpenBSD: sxiccmu.c,v 1.29 2021/10/24 17:52:27 mpi Exp $ */ +/* $OpenBSD: sxiccmu.c,v 1.30 2021/12/03 19:22:42 uaa Exp $ */ /* * Copyright (c) 2007,2009 Dale Rahn <drahn@openbsd.org> * Copyright (c) 2013 Artturi Alm @@ -1311,15 +1311,30 @@ sxiccmu_h3_r_get_frequency(struct sxiccmu_softc *sc, uint32_t idx) return 0; } +/* Allwinner H6 */ +#define H6_AHB3_CFG_REG 0x051c +#define H6_AHB3_CLK_FACTOR_N(x) (((x) >> 8) & 0x3) +#define H6_AHB3_CLK_FACTOR_M(x) (((x) >> 0) & 0x3) + uint32_t sxiccmu_h6_get_frequency(struct sxiccmu_softc *sc, uint32_t idx) { + uint32_t reg, m, n; + uint32_t freq; + switch (idx) { case H6_CLK_PLL_PERIPH0: /* Not hardcoded, but recommended. */ return 600000000; case H6_CLK_PLL_PERIPH0_2X: return sxiccmu_h6_get_frequency(sc, H6_CLK_PLL_PERIPH0) * 2; + case H6_CLK_AHB3: + reg = SXIREAD4(sc, H6_AHB3_CFG_REG); + /* assume PLL_PERIPH0 source */ + freq = sxiccmu_h6_get_frequency(sc, H6_CLK_PLL_PERIPH0); + m = H6_AHB3_CLK_FACTOR_M(reg) + 1; + n = 1 << H6_AHB3_CLK_FACTOR_N(reg); + return freq / (m * n); case H6_CLK_APB2: /* XXX Controlled by a MUX. */ return 24000000; |