diff options
Diffstat (limited to 'target/linux/rockchip/patches-6.1/002-v6.4-mmc-sdhci-of-dwcmshc-properly-determine-max-clock-on.patch')
| -rw-r--r-- | target/linux/rockchip/patches-6.1/002-v6.4-mmc-sdhci-of-dwcmshc-properly-determine-max-clock-on.patch | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/target/linux/rockchip/patches-6.1/002-v6.4-mmc-sdhci-of-dwcmshc-properly-determine-max-clock-on.patch b/target/linux/rockchip/patches-6.1/002-v6.4-mmc-sdhci-of-dwcmshc-properly-determine-max-clock-on.patch new file mode 100644 index 0000000000..9d9c1b5c1c --- /dev/null +++ b/target/linux/rockchip/patches-6.1/002-v6.4-mmc-sdhci-of-dwcmshc-properly-determine-max-clock-on.patch @@ -0,0 +1,52 @@ +From 49502408007b77ff290ce62e6218cefaeedcb31a Mon Sep 17 00:00:00 2001 +From: Vasily Khoruzhick <anarsoul@gmail.com> +Date: Thu, 9 Mar 2023 17:03:49 -0800 +Subject: [PATCH] mmc: sdhci-of-dwcmshc: properly determine max clock on + Rockchip + +Currently .get_max_clock returns the current clock rate for cclk_emmc +on rk35xx, thus max clock gets set to whatever bootloader set it to. + +In case of u-boot, it is intentionally reset to 50 MHz if it boots +from eMMC, see mmc_deinit() in u-boot sources. As a result, HS200 and +HS400 modes are never selected by Linux, because dwcmshc_rk35xx_postinit +clears appropriate caps if host->mmc->f_max is < 52MHz + +cclk_emmc is not a fixed clock on rk35xx, so using +sdhci_pltfm_clk_get_max_clock is not appropriate here. + +Implement rk35xx_get_max_clock that returns actual max clock for cclk_emmc. + +Signed-off-by: Vasily Khoruzhick <anarsoul@gmail.com> +Acked-by: Adrian Hunter <adrian.hunter@intel.com> +Link: https://lore.kernel.org/r/20230310010349.509132-1-anarsoul@gmail.com +Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> +--- + drivers/mmc/host/sdhci-of-dwcmshc.c | 9 ++++++++- + 1 file changed, 8 insertions(+), 1 deletion(-) + +--- a/drivers/mmc/host/sdhci-of-dwcmshc.c ++++ b/drivers/mmc/host/sdhci-of-dwcmshc.c +@@ -126,6 +126,13 @@ static unsigned int dwcmshc_get_max_cloc + return pltfm_host->clock; + } + ++static unsigned int rk35xx_get_max_clock(struct sdhci_host *host) ++{ ++ struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); ++ ++ return clk_round_rate(pltfm_host->clk, ULONG_MAX); ++} ++ + static void dwcmshc_check_auto_cmd23(struct mmc_host *mmc, + struct mmc_request *mrq) + { +@@ -343,7 +350,7 @@ static const struct sdhci_ops sdhci_dwcm + .set_clock = dwcmshc_rk3568_set_clock, + .set_bus_width = sdhci_set_bus_width, + .set_uhs_signaling = dwcmshc_set_uhs_signaling, +- .get_max_clock = sdhci_pltfm_clk_get_max_clock, ++ .get_max_clock = rk35xx_get_max_clock, + .reset = rk35xx_sdhci_reset, + .adma_write_desc = dwcmshc_adma_write_desc, + }; |