diff options
| author | Jonathan Gray <jsg@jsg.id.au> | 2018-03-17 16:15:48 +1100 |
|---|---|---|
| committer | Alexander Graf <agraf@suse.de> | 2018-04-05 13:17:43 +0200 |
| commit | 8ae1f8298820a19380bafc07ad554bd629cc27be (patch) | |
| tree | 3273708813ed59db52cdbd6c29904509c80eae44 /arch/arm/mach-bcm283x | |
| parent | 79153ff0c4383ff45d11be1e52ad94a1d24240f8 (diff) | |
mmc: use core clock frequency in bcm2835 sdhost
In raspberrypi-firmware 7fdcd00e00a42a1c91e8bd6f5eb8352fe9358557 and
later start.elf now sets the EMMC clock to 200 MHz.
According to Phil Elwell in
https://github.com/raspberrypi/firmware/issues/953
the SDHost controller shares the core/VPU clock and doesn't use
the EMMC clock.
Use the core clock id when determining the frequency to allow
U-Boot to work with recent versions of raspberrypi-firmware.
Otherwise U-Boot hangs at:
U-Boot 2018.03 (Mar 14 2018 - 20:36:00 +1100)
DRAM: 948 MiB
RPI 3 Model B (0xa02082)
MMC: mmc@7e202000: 0, sdhci@7e300000: 1
Loading Environment from FAT...
Signed-off-by: Jonathan Gray <jsg@jsg.id.au>
Signed-off-by: Alexander Graf <agraf@suse.de>
Diffstat (limited to 'arch/arm/mach-bcm283x')
| -rw-r--r-- | arch/arm/mach-bcm283x/include/mach/msg.h | 3 | ||||
| -rw-r--r-- | arch/arm/mach-bcm283x/msg.c | 4 |
2 files changed, 4 insertions, 3 deletions
diff --git a/arch/arm/mach-bcm283x/include/mach/msg.h b/arch/arm/mach-bcm283x/include/mach/msg.h index 478b1f1c50..d055480ba1 100644 --- a/arch/arm/mach-bcm283x/include/mach/msg.h +++ b/arch/arm/mach-bcm283x/include/mach/msg.h @@ -18,9 +18,10 @@ int bcm2835_power_on_module(u32 module); /** * bcm2835_get_mmc_clock() - get the frequency of the MMC clock * + * @clock_id: ID of clock to get frequency for * @return clock frequency, or -ve on error */ -int bcm2835_get_mmc_clock(void); +int bcm2835_get_mmc_clock(u32 clock_id); /** * bcm2835_get_video_size() - get the current display size diff --git a/arch/arm/mach-bcm283x/msg.c b/arch/arm/mach-bcm283x/msg.c index 92e93ad9e5..ad29f3be09 100644 --- a/arch/arm/mach-bcm283x/msg.c +++ b/arch/arm/mach-bcm283x/msg.c @@ -65,7 +65,7 @@ int bcm2835_power_on_module(u32 module) return 0; } -int bcm2835_get_mmc_clock(void) +int bcm2835_get_mmc_clock(u32 clock_id) { ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_clock_rate, msg_clk, 1); int ret; @@ -76,7 +76,7 @@ int bcm2835_get_mmc_clock(void) BCM2835_MBOX_INIT_HDR(msg_clk); BCM2835_MBOX_INIT_TAG(&msg_clk->get_clock_rate, GET_CLOCK_RATE); - msg_clk->get_clock_rate.body.req.clock_id = BCM2835_MBOX_CLOCK_ID_EMMC; + msg_clk->get_clock_rate.body.req.clock_id = clock_id; ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg_clk->hdr); if (ret) { |