From: "Michał Mirosław" <mirq-linux@rere.qmqm.pl>
To: Adrian Hunter <adrian.hunter@intel.com>,
Kevin Liu <kliu5@marvell.com>,
Michal Simek <michal.simek@xilinx.com>,
Suneel Garapati <suneel.garapati@xilinx.com>,
Ulf Hansson <ulf.hansson@linaro.org>
Cc: linux-kernel@vger.kernel.org, linux-mmc@vger.kernel.org
Subject: [PATCH 7/7] mmc: sdhci: respect non-zero div quirk in programmable clock mode
Date: Thu, 02 Apr 2020 13:54:58 +0200 [thread overview]
Message-ID: <84482c3f74fae701f8366bea681fc799918b1ab8.1585827904.git.mirq-linux@rere.qmqm.pl> (raw)
In-Reply-To: <cover.1585827904.git.mirq-linux@rere.qmqm.pl>
Make SDHCI_QUIRK2_CLOCK_DIV_ZERO_BROKEN respected also in programmable
clock mode.
Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
---
drivers/mmc/host/sdhci.c | 9 ++++++---
1 file changed, 6 insertions(+), 3 deletions(-)
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index 01fd897f8f3c..df80f39c570b 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -1807,9 +1807,6 @@ u16 sdhci_calc_clk(struct sdhci_host *host, unsigned int clock,
div = DIV_ROUND_UP(host->max_clk, clock);
- if (div == 1 && (host->quirks2 & SDHCI_QUIRK2_CLOCK_DIV_ZERO_BROKEN))
- div = 2;
-
if (host->version >= SDHCI_SPEC_300) {
/* Version 3.00 divisors must be a multiple of 2. */
div = min(div, SDHCI_MAX_DIV_SPEC_300);
@@ -1823,6 +1820,12 @@ u16 sdhci_calc_clk(struct sdhci_host *host, unsigned int clock,
real_div = div * 2 + !div;
clock_set:
+ if (!div && (host->quirks2 & SDHCI_QUIRK2_CLOCK_DIV_ZERO_BROKEN)) {
+ /* for div == 1, clock rate is divided by 2 in both modes */
+ div = 1;
+ real_div = 2;
+ }
+
*actual_clock = (host->max_clk * clk_mul) / real_div;
clk |= (div & SDHCI_DIV_MASK) << SDHCI_DIVIDER_SHIFT;
clk |= ((div & SDHCI_DIV_HI_MASK) >> SDHCI_DIV_MASK_LEN)
--
2.20.1
next prev parent reply other threads:[~2020-04-02 11:55 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-02 11:54 [PATCH 0/7] SDHCI clock handling fixes and cleanups Michał Mirosław
2020-04-02 11:54 ` [PATCH 3/7] mmc: sdhci: fix SDHCI_QUIRK2_CLOCK_DIV_ZERO_BROKEN Michał Mirosław
2020-04-15 13:06 ` Adrian Hunter
2020-04-15 16:03 ` Michał Mirosław
2020-04-16 7:40 ` Adrian Hunter
2020-04-02 11:54 ` [PATCH 2/7] mmc: sdhci: fix programmable clock config from preset value Michał Mirosław
2020-04-15 12:44 ` Adrian Hunter
2020-04-02 11:54 ` [PATCH 1/7] mmc: sdhci: fix base clock usage in " Michał Mirosław
2020-04-15 12:25 ` Adrian Hunter
2020-04-15 16:28 ` Michał Mirosław
2020-04-16 8:26 ` Adrian Hunter
2020-04-17 13:55 ` Alan Cooper
2020-04-20 5:31 ` Adrian Hunter
2020-04-02 11:54 ` [PATCH 4/7] mmc: sdhci: move SDHCI_QUIRK2_CLOCK_DIV_ZERO_BROKEN frequency limit Michał Mirosław
2020-04-15 13:16 ` Adrian Hunter
2020-04-15 16:16 ` Michał Mirosław
2020-04-16 7:43 ` Adrian Hunter
2020-04-02 11:54 ` [PATCH 6/7] mmc: sdhci: squash v2/v3+ clock calculation differences Michał Mirosław
2020-04-02 11:54 ` [PATCH 5/7] mmc: sdhci: simplify clock frequency calculation Michał Mirosław
2020-04-03 13:02 ` kbuild test robot
2020-04-03 16:15 ` Michał Mirosław
2020-04-15 13:54 ` Adrian Hunter
2020-04-15 16:45 ` Michał Mirosław
2020-04-02 11:54 ` Michał Mirosław [this message]
2020-04-03 16:03 ` [PATCH 7/7] mmc: sdhci: respect non-zero div quirk in programmable clock mode kbuild test robot
2020-04-15 8:52 ` [PATCH 0/7] SDHCI clock handling fixes and cleanups Ulf Hansson
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