diff options
| author |   patrick <patrick@openbsd.org> | 2020-10-12 17:38:28 +0000 |
|---|---|---|
| committer | patrick <patrick@openbsd.org> | 2020-10-12 17:38:28 +0000 |
| commit | 6d21c932f79015bf0cc654c00c7dc66388994b3f (patch) | |
| tree | f042ffeec0fdce748c236c86d4938c83350727ca /sys/dev/fdt/imxccm.c | |
| parent | OCOTP's parent clock is the IPG clock on i.MX8M. (diff) | |
| download | wireguard-openbsd-6d21c932f79015bf0cc654c00c7dc66388994b3f.tar.xz wireguard-openbsd-6d21c932f79015bf0cc654c00c7dc66388994b3f.zip | |
Add support for the i.MX8M AHB clocks. These behave just like all the
other composite clocks. With this we can get the frequency for the OCOTP.
Diffstat (limited to 'sys/dev/fdt/imxccm.c')
| -rw-r--r-- | sys/dev/fdt/imxccm.c | 68 |
1 files changed, 67 insertions, 1 deletions
diff --git a/sys/dev/fdt/imxccm.c b/sys/dev/fdt/imxccm.c index beb246ea022..91301606e86 100644 --- a/sys/dev/fdt/imxccm.c +++ b/sys/dev/fdt/imxccm.c @@ -1,4 +1,4 @@ -/* $OpenBSD: imxccm.c,v 1.21 2020/04/28 19:26:45 patrick Exp $ */ +/* $OpenBSD: imxccm.c,v 1.22 2020/10/12 17:38:28 patrick Exp $ */ /* * Copyright (c) 2012-2013 Patrick Wildt <patrick@blueri.se> * @@ -244,11 +244,13 @@ uint32_t imxccm_get_ipgclk(struct imxccm_softc *); uint32_t imxccm_get_ipg_perclk(struct imxccm_softc *); uint32_t imxccm_get_uartclk(struct imxccm_softc *); uint32_t imxccm_imx8mm_enet(struct imxccm_softc *sc, uint32_t); +uint32_t imxccm_imx8mm_ahb(struct imxccm_softc *sc, uint32_t); uint32_t imxccm_imx8mm_i2c(struct imxccm_softc *sc, uint32_t); uint32_t imxccm_imx8mm_uart(struct imxccm_softc *sc, uint32_t); uint32_t imxccm_imx8mm_usdhc(struct imxccm_softc *sc, uint32_t); uint32_t imxccm_imx8mq_ecspi(struct imxccm_softc *sc, uint32_t); uint32_t imxccm_imx8mq_enet(struct imxccm_softc *sc, uint32_t); +uint32_t imxccm_imx8mq_ahb(struct imxccm_softc *sc, uint32_t); uint32_t imxccm_imx8mq_i2c(struct imxccm_softc *sc, uint32_t); uint32_t imxccm_imx8mq_pwm(struct imxccm_softc *sc, uint32_t); uint32_t imxccm_imx8mq_uart(struct imxccm_softc *sc, uint32_t); @@ -775,6 +777,35 @@ imxccm_imx8mm_enet(struct imxccm_softc *sc, uint32_t idx) } uint32_t +imxccm_imx8mm_ahb(struct imxccm_softc *sc, uint32_t idx) +{ + uint32_t mux; + + if (idx >= sc->sc_nmuxs || sc->sc_muxs[idx].reg == 0) + return 0; + + mux = HREAD4(sc, sc->sc_muxs[idx].reg); + mux >>= sc->sc_muxs[idx].shift; + mux &= sc->sc_muxs[idx].mask; + + switch (mux) { + case 0: + return clock_get_frequency(sc->sc_node, "osc_24m"); + case 1: + return 133 * 1000 * 1000; /* sys_pll1_133m */ + case 2: + return 800 * 1000 * 1000; /* sys_pll1_800m */ + case 3: + return 400 * 1000 * 1000; /* sys_pll1_400m */ + case 4: + return 125 * 1000 * 1000; /* sys_pll2_125m */ + default: + printf("%s: 0x%08x 0x%08x\n", __func__, idx, mux); + return 0; + } +} + +uint32_t imxccm_imx8mm_i2c(struct imxccm_softc *sc, uint32_t idx) { uint32_t mux; @@ -886,6 +917,35 @@ imxccm_imx8mq_enet(struct imxccm_softc *sc, uint32_t idx) } uint32_t +imxccm_imx8mq_ahb(struct imxccm_softc *sc, uint32_t idx) +{ + uint32_t mux; + + if (idx >= sc->sc_nmuxs || sc->sc_muxs[idx].reg == 0) + return 0; + + mux = HREAD4(sc, sc->sc_muxs[idx].reg); + mux >>= sc->sc_muxs[idx].shift; + mux &= sc->sc_muxs[idx].mask; + + switch (mux) { + case 0: + return clock_get_frequency(sc->sc_node, "osc_25m"); + case 1: + return 133 * 1000 * 1000; /* sys1_pll_133m */ + case 2: + return 800 * 1000 * 1000; /* sys1_pll_800m */ + case 3: + return 400 * 1000 * 1000; /* sys1_pll_400m */ + case 4: + return 125 * 1000 * 1000; /* sys2_pll_125m */ + default: + printf("%s: 0x%08x 0x%08x\n", __func__, idx, mux); + return 0; + } +} + +uint32_t imxccm_imx8mq_i2c(struct imxccm_softc *sc, uint32_t idx) { uint32_t mux; @@ -1387,6 +1447,9 @@ imxccm_get_frequency(void *cookie, uint32_t *cells) case IMX8MM_CLK_ENET_AXI: freq = imxccm_imx8mm_enet(sc, idx); break; + case IMX8MM_CLK_AHB: + freq = imxccm_imx8mm_ahb(sc, idx); + break; case IMX8MM_CLK_I2C1: case IMX8MM_CLK_I2C2: case IMX8MM_CLK_I2C3: @@ -1433,6 +1496,9 @@ imxccm_get_frequency(void *cookie, uint32_t *cells) case IMX8MQ_CLK_ENET_AXI: freq = imxccm_imx8mq_enet(sc, idx); break; + case IMX8MQ_CLK_AHB: + freq = imxccm_imx8mq_ahb(sc, idx); + break; case IMX8MQ_CLK_I2C1: case IMX8MQ_CLK_I2C2: case IMX8MQ_CLK_I2C3: |