diff options
Diffstat (limited to 'meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71-e3000/0098-mmc-core-more-fine-grained-hooks-for-HS400-tuning.patch')
| -rw-r--r-- | meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71-e3000/0098-mmc-core-more-fine-grained-hooks-for-HS400-tuning.patch | 86 |
1 files changed, 0 insertions, 86 deletions
diff --git a/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71-e3000/0098-mmc-core-more-fine-grained-hooks-for-HS400-tuning.patch b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71-e3000/0098-mmc-core-more-fine-grained-hooks-for-HS400-tuning.patch deleted file mode 100644 index 8017ef7b..00000000 --- a/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71-e3000/0098-mmc-core-more-fine-grained-hooks-for-HS400-tuning.patch +++ /dev/null @@ -1,86 +0,0 @@ -From 3f3089099ceefd39f728a341fb57ca48f0fbc163 Mon Sep 17 00:00:00 2001 -From: Simon Horman <horms+renesas@verge.net.au> -Date: Mon, 18 Jun 2018 14:57:49 +0200 -Subject: [PATCH 098/131] mmc: core: more fine-grained hooks for HS400 tuning - -This adds two new HS400 tuning operations: -* hs400_downgrade -* hs400_complete - -These supplement the existing HS400 operation: -* prepare_hs400_tuning - -This is motivated by a requirement of Renesas SDHI for the following: -1. Disabling SCC before selecting to HS if selection of HS400 has occurred. - This can be done in an implementation of prepare_hs400_tuning_downgrade -2. Updating registers after switching to HS400 - This can be done in an implementation of complete_hs400_tuning - -If hs400_downgrade or hs400_complete are not implemented then they are not -called. Thus means there should be no affect for existing drivers as none -implemt these ops. - -Signed-off-by: Simon Horman <horms+renesas@verge.net.au> -Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> -Signed-off-by: Sudheesh Mavila <sudheesh.mavila@amd.com> ---- - drivers/mmc/core/mmc.c | 10 ++++++++++ - include/linux/mmc/host.h | 7 +++++++ - 2 files changed, 17 insertions(+) - -diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c -index 16845a8..16b22d7 100644 ---- a/drivers/mmc/core/mmc.c -+++ b/drivers/mmc/core/mmc.c -@@ -1165,6 +1165,10 @@ static int mmc_select_hs400(struct mmc_card *card) - /* Set host controller to HS timing */ - mmc_set_timing(card->host, MMC_TIMING_MMC_HS); - -+ /* Prepare host to downgrade to HS timing */ -+ if (host->ops->hs400_downgrade) -+ host->ops->hs400_downgrade(host); -+ - /* Reduce frequency to HS frequency */ - max_dtr = card->ext_csd.hs_max_dtr; - mmc_set_clock(host, max_dtr); -@@ -1205,6 +1209,9 @@ static int mmc_select_hs400(struct mmc_card *card) - if (err) - goto out_err; - -+ if (host->ops->hs400_complete) -+ host->ops->hs400_complete(host); -+ - return 0; - - out_err: -@@ -1252,6 +1259,9 @@ int mmc_hs400_to_hs200(struct mmc_card *card) - - mmc_set_timing(host, MMC_TIMING_MMC_HS); - -+ if (host->ops->hs400_downgrade) -+ host->ops->hs400_downgrade(host); -+ - err = mmc_switch_status(card); - if (err) - goto out_err; -diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h -index 9a43763..843c38f 100644 ---- a/include/linux/mmc/host.h -+++ b/include/linux/mmc/host.h -@@ -145,6 +145,13 @@ struct mmc_host_ops { - - /* Prepare HS400 target operating frequency depending host driver */ - int (*prepare_hs400_tuning)(struct mmc_host *host, struct mmc_ios *ios); -+ -+ /* Prepare for switching from HS400 to HS200 */ -+ void (*hs400_downgrade)(struct mmc_host *host); -+ -+ /* Complete selection of HS400 */ -+ void (*hs400_complete)(struct mmc_host *host); -+ - /* Prepare enhanced strobe depending host driver */ - void (*hs400_enhanced_strobe)(struct mmc_host *host, - struct mmc_ios *ios); --- -2.7.4 - |