From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: linux-kernel@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
stable@vger.kernel.org, Prathamesh Shete <pshete@nvidia.com>,
Adrian Hunter <adrian.hunter@intel.com>,
Ulf Hansson <ulf.hansson@linaro.org>
Subject: [PATCH 5.4 32/47] mmc: sdhci-tegra: Fix switch to HS400ES mode
Date: Mon, 27 Dec 2021 16:31:08 +0100 [thread overview]
Message-ID: <20211227151321.900547726@linuxfoundation.org> (raw)
In-Reply-To: <20211227151320.801714429@linuxfoundation.org>
From: Prathamesh Shete <pshete@nvidia.com>
commit 4fc7261dbab139d3c64c3b618262504e16cfe7ee upstream.
When CMD13 is sent after switching to HS400ES mode, the bus
is operating at either MMC_HIGH_26_MAX_DTR or MMC_HIGH_52_MAX_DTR.
To meet Tegra SDHCI requirement at HS400ES mode, force SDHCI
interface clock to MMC_HS200_MAX_DTR (200 MHz) so that host
controller CAR clock and the interface clock are rate matched.
Signed-off-by: Prathamesh Shete <pshete@nvidia.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Fixes: dfc9700cef77 ("mmc: tegra: Implement HS400 enhanced strobe")
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20211214113653.4631-1-pshete@nvidia.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/mmc/host/sdhci-tegra.c | 43 ++++++++++++++++++++++++-----------------
1 file changed, 26 insertions(+), 17 deletions(-)
--- a/drivers/mmc/host/sdhci-tegra.c
+++ b/drivers/mmc/host/sdhci-tegra.c
@@ -340,23 +340,6 @@ static void tegra_sdhci_set_tap(struct s
}
}
-static void tegra_sdhci_hs400_enhanced_strobe(struct mmc_host *mmc,
- struct mmc_ios *ios)
-{
- struct sdhci_host *host = mmc_priv(mmc);
- u32 val;
-
- val = sdhci_readl(host, SDHCI_TEGRA_VENDOR_SYS_SW_CTRL);
-
- if (ios->enhanced_strobe)
- val |= SDHCI_TEGRA_SYS_SW_CTRL_ENHANCED_STROBE;
- else
- val &= ~SDHCI_TEGRA_SYS_SW_CTRL_ENHANCED_STROBE;
-
- sdhci_writel(host, val, SDHCI_TEGRA_VENDOR_SYS_SW_CTRL);
-
-}
-
static void tegra_sdhci_reset(struct sdhci_host *host, u8 mask)
{
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
@@ -768,6 +751,32 @@ static void tegra_sdhci_set_clock(struct
}
}
+static void tegra_sdhci_hs400_enhanced_strobe(struct mmc_host *mmc,
+ struct mmc_ios *ios)
+{
+ struct sdhci_host *host = mmc_priv(mmc);
+ u32 val;
+
+ val = sdhci_readl(host, SDHCI_TEGRA_VENDOR_SYS_SW_CTRL);
+
+ if (ios->enhanced_strobe) {
+ val |= SDHCI_TEGRA_SYS_SW_CTRL_ENHANCED_STROBE;
+ /*
+ * When CMD13 is sent from mmc_select_hs400es() after
+ * switching to HS400ES mode, the bus is operating at
+ * either MMC_HIGH_26_MAX_DTR or MMC_HIGH_52_MAX_DTR.
+ * To meet Tegra SDHCI requirement at HS400ES mode, force SDHCI
+ * interface clock to MMC_HS200_MAX_DTR (200 MHz) so that host
+ * controller CAR clock and the interface clock are rate matched.
+ */
+ tegra_sdhci_set_clock(host, MMC_HS200_MAX_DTR);
+ } else {
+ val &= ~SDHCI_TEGRA_SYS_SW_CTRL_ENHANCED_STROBE;
+ }
+
+ sdhci_writel(host, val, SDHCI_TEGRA_VENDOR_SYS_SW_CTRL);
+}
+
static unsigned int tegra_sdhci_get_max_clock(struct sdhci_host *host)
{
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
next prev parent reply other threads:[~2021-12-27 15:35 UTC|newest]
Thread overview: 54+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-12-27 15:30 [PATCH 5.4 00/47] 5.4.169-rc1 review Greg Kroah-Hartman
2021-12-27 15:30 ` [PATCH 5.4 01/47] net: usb: lan78xx: add Allied Telesis AT29M2-AF Greg Kroah-Hartman
2021-12-27 15:30 ` [PATCH 5.4 02/47] serial: 8250_fintek: Fix garbled text for console Greg Kroah-Hartman
2021-12-27 15:30 ` [PATCH 5.4 03/47] HID: holtek: fix mouse probing Greg Kroah-Hartman
2021-12-27 15:30 ` [PATCH 5.4 04/47] arm64: dts: allwinner: orangepi-zero-plus: fix PHY mode Greg Kroah-Hartman
2021-12-27 15:30 ` [PATCH 5.4 05/47] spi: change clk_disable_unprepare to clk_unprepare Greg Kroah-Hartman
2021-12-27 15:30 ` [PATCH 5.4 06/47] IB/qib: Fix memory leak in qib_user_sdma_queue_pkts() Greg Kroah-Hartman
2021-12-27 15:30 ` [PATCH 5.4 07/47] netfilter: fix regression in looped (broad|multi)casts MAC handling Greg Kroah-Hartman
2021-12-27 15:30 ` [PATCH 5.4 08/47] qlcnic: potential dereference null pointer of rx_queue->page_ring Greg Kroah-Hartman
2021-12-27 15:30 ` [PATCH 5.4 09/47] net: accept UFOv6 packages in virtio_net_hdr_to_skb Greg Kroah-Hartman
2021-12-27 15:30 ` [PATCH 5.4 10/47] net: skip virtio_net_hdr_set_proto if protocol already set Greg Kroah-Hartman
2021-12-27 15:30 ` [PATCH 5.4 11/47] ipmi: Fix UAF when uninstall ipmi_si and ipmi_msghandler module Greg Kroah-Hartman
2021-12-27 15:30 ` [PATCH 5.4 12/47] bonding: fix ad_actor_system option setting to default Greg Kroah-Hartman
2021-12-27 15:30 ` [PATCH 5.4 13/47] fjes: Check for error irq Greg Kroah-Hartman
2021-12-27 15:30 ` [PATCH 5.4 14/47] drivers: net: smc911x: " Greg Kroah-Hartman
2021-12-27 15:30 ` [PATCH 5.4 15/47] sfc: falcon: Check null pointer of rx_queue->page_ring Greg Kroah-Hartman
2021-12-27 15:30 ` [PATCH 5.4 16/47] Input: elantech - fix stack out of bound access in elantech_change_report_id() Greg Kroah-Hartman
2021-12-27 15:30 ` [PATCH 5.4 17/47] hwmon: (lm90) Fix usage of CONFIG2 register in detect function Greg Kroah-Hartman
2021-12-27 15:30 ` [PATCH 5.4 18/47] hwmon: (lm90) Add max6654 support to lm90 driver Greg Kroah-Hartman
2021-12-27 15:30 ` [PATCH 5.4 19/47] hwmon: (lm90) Add basic support for TI TMP461 Greg Kroah-Hartman
2021-12-27 15:30 ` [PATCH 5.4 20/47] hwmon: (lm90) Introduce flag indicating extended temperature support Greg Kroah-Hartman
2021-12-27 15:30 ` [PATCH 5.4 21/47] hwmon: (lm90) Drop critical attribute support for MAX6654 Greg Kroah-Hartman
2021-12-27 15:30 ` [PATCH 5.4 22/47] ALSA: jack: Check the return value of kstrdup() Greg Kroah-Hartman
2021-12-27 15:30 ` [PATCH 5.4 23/47] ALSA: drivers: opl3: Fix incorrect use of vp->state Greg Kroah-Hartman
2021-12-27 15:31 ` [PATCH 5.4 24/47] ALSA: hda/realtek: Amp init fixup for HP ZBook 15 G6 Greg Kroah-Hartman
2021-12-27 15:31 ` [PATCH 5.4 25/47] Input: atmel_mxt_ts - fix double free in mxt_read_info_block Greg Kroah-Hartman
2021-12-27 15:31 ` [PATCH 5.4 26/47] ipmi: bail out if init_srcu_struct fails Greg Kroah-Hartman
2021-12-27 15:31 ` [PATCH 5.4 27/47] ipmi: ssif: initialize ssif_info->client early Greg Kroah-Hartman
2021-12-27 15:31 ` [PATCH 5.4 28/47] ipmi: fix initialization when workqueue allocation fails Greg Kroah-Hartman
2021-12-27 15:31 ` [PATCH 5.4 29/47] parisc: Correct completer in lws start Greg Kroah-Hartman
2021-12-27 15:31 ` [PATCH 5.4 30/47] x86/pkey: Fix undefined behaviour with PKRU_WD_BIT Greg Kroah-Hartman
2021-12-27 15:31 ` [PATCH 5.4 31/47] pinctrl: stm32: consider the GPIO offset to expose all the GPIO lines Greg Kroah-Hartman
2021-12-27 15:31 ` Greg Kroah-Hartman [this message]
2021-12-27 15:31 ` [PATCH 5.4 33/47] mmc: core: Disable card detect during shutdown Greg Kroah-Hartman
2021-12-27 15:31 ` [PATCH 5.4 34/47] ARM: 9169/1: entry: fix Thumb2 bug in iWMMXt exception handling Greg Kroah-Hartman
2021-12-27 15:31 ` [PATCH 5.4 35/47] tee: optee: Fix incorrect page free bug Greg Kroah-Hartman
2021-12-27 15:31 ` [PATCH 5.4 36/47] f2fs: fix to do sanity check on last xattr entry in __f2fs_setxattr() Greg Kroah-Hartman
2021-12-27 15:31 ` [PATCH 5.4 37/47] usb: gadget: u_ether: fix race in setting MAC address in setup phase Greg Kroah-Hartman
2021-12-27 15:31 ` [PATCH 5.4 38/47] KVM: VMX: Fix stale docs for kvm-intel.emulate_invalid_guest_state Greg Kroah-Hartman
2021-12-27 15:31 ` [PATCH 5.4 39/47] mm: mempolicy: fix THP allocations escaping mempolicy restrictions Greg Kroah-Hartman
2021-12-27 15:31 ` [PATCH 5.4 40/47] Input: i8042 - enable deferred probe quirk for ASUS UM325UA Greg Kroah-Hartman
2021-12-27 15:31 ` [PATCH 5.4 41/47] pinctrl: mediatek: fix global-out-of-bounds issue Greg Kroah-Hartman
2021-12-27 15:31 ` [PATCH 5.4 42/47] hwmom: (lm90) Fix citical alarm status for MAX6680/MAX6681 Greg Kroah-Hartman
2021-12-27 15:31 ` [PATCH 5.4 43/47] hwmon: (lm90) Do not report busy status bit as alarm Greg Kroah-Hartman
2021-12-27 15:31 ` [PATCH 5.4 44/47] ax25: NPD bug when detaching AX25 device Greg Kroah-Hartman
2021-12-27 15:31 ` [PATCH 5.4 45/47] hamradio: defer ax25 kfree after unregister_netdev Greg Kroah-Hartman
2021-12-27 15:31 ` [PATCH 5.4 46/47] hamradio: improve the incomplete fix to avoid NPD Greg Kroah-Hartman
2021-12-27 15:31 ` [PATCH 5.4 47/47] phonet/pep: refuse to enable an unbound pipe Greg Kroah-Hartman
2021-12-27 17:43 ` [PATCH 5.4 00/47] 5.4.169-rc1 review Florian Fainelli
2021-12-28 0:56 ` Samuel Zou
2021-12-28 10:21 ` Naresh Kamboju
2021-12-28 13:20 ` Sudip Mukherjee
2021-12-28 17:07 ` Guenter Roeck
2021-12-28 21:28 ` Shuah Khan
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20211227151321.900547726@linuxfoundation.org \
--to=gregkh@linuxfoundation.org \
--cc=adrian.hunter@intel.com \
--cc=linux-kernel@vger.kernel.org \
--cc=pshete@nvidia.com \
--cc=stable@vger.kernel.org \
--cc=ulf.hansson@linaro.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).