Andre, this has been assigned to me by mistake in patchwork. I guess Tom can pick it up directly after the reviews etc?
Thanks /Ilias On Wed May 27, 2026 at 12:28 AM EEST, Omar Ivan Fardjoume wrote: > Hi, first thanks for everything you do. > I was working on reviving a cubieboard4 a80 board and I found and fix > two issues that prevented eMMC from working on sun9i-A80 boards: > 1. The get_mclk_offset() function used the non-existent Kconfig symbol > CONFIG_MACH_SUN9I_A80 instead of CONFIG_MACH_SUN9I, causing the > MMC2 clock register to be written at 0x06000090 instead of > 0x06000418. This corrupted the CMD2 response and made eMMC > completely unresponsive. > 2. The legacy (SPL) sunxi_mmc_init() did not include CONFIG_MACH_SUN9I > in the 8-bit bus width condition, so MMC2 (eMMC) would only use > 4-bit mode in the SPL, which is insufficient for reliable boot. > Tested on a Cubieboard4 A80: with both fixes, SPL loads U-Boot proper > and boots Debian 12 from eMMC with no SD card present. > Signed-off-by: Omar Ivan Fardjoume <[email protected]> > --- > drivers/mmc/sunxi_mmc.c | 3 ++- > 1 file changed, 2 insertions(+), 1 deletion(-) > diff --git a/drivers/mmc/sunxi_mmc.c b/drivers/mmc/sunxi_mmc.c > index 4c5fbf8960f..3d5e7c1a234 100644 > --- a/drivers/mmc/sunxi_mmc.c > +++ b/drivers/mmc/sunxi_mmc.c > @@ -546,7 +546,7 @@ struct mmc *sunxi_mmc_init(int sdc_no) > cfg->voltages = MMC_VDD_32_33 | MMC_VDD_33_34; > cfg->host_caps = MMC_MODE_4BIT; > > - if ((IS_ENABLED(CONFIG_MACH_SUN50I) || IS_ENABLED(CONFIG_MACH_SUN8I) || > + if ((IS_ENABLED(CONFIG_MACH_SUN50I) || IS_ENABLED(CONFIG_MACH_SUN8I) > || IS_ENABLED(CONFIG_MACH_SUN9I) || > IS_ENABLED(CONFIG_SUN50I_GEN_H6) || > IS_ENABLED(CONFIG_MACH_SUN55I_A523)) && > (sdc_no == 2)) > cfg->host_caps = MMC_MODE_8BIT; > @@ -663,7 +663,7 @@ static const struct dm_mmc_ops sunxi_mmc_ops = { > > static unsigned get_mclk_offset(void) > { > - if (IS_ENABLED(CONFIG_MACH_SUN9I_A80)) > + if (IS_ENABLED(CONFIG_MACH_SUN9I)) > return 0x410; > > if (IS_ENABLED(CONFIG_SUN50I_GEN_H6) || IS_ENABLED(CONFIG_SUNXI_GEN_NCAT2))
