linux-kernel - [PATCH v4 4/5] mmc: sdhci: move SDHCI_QUIRK2_CLOCK_DIV_ZERO

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Date:   Sun, 25 Jul 2021 11:20:49 +0200
From:   Michał Mirosław <mirq-linux@...e.qmqm.pl>
To:     Michal Simek <michal.simek@...inx.com>,
        Kevin Liu <kliu5@...vell.com>,
        Suneel Garapati <suneel.garapati@...inx.com>,
        Ulf Hansson <ulf.hansson@...aro.org>
Cc:     Adrian Hunter <adrian.hunter@...el.com>,
        linux-kernel@...r.kernel.org, linux-mmc@...r.kernel.org,
        Al Cooper <alcooperx@...il.com>
Subject: [PATCH v4 4/5] mmc: sdhci: move SDHCI_QUIRK2_CLOCK_DIV_ZERO_BROKEN
 frequency limit

Push handling of clock frequency dependence for
SDHCI_QUIRK2_CLOCK_DIV_ZERO_BROKEN quirk to the drivers that use it.

Signed-off-by: Michał Mirosław <mirq-linux@...e.qmqm.pl>
---
v4: fix build issue reported by kernel test robot
v3: rebased on v5.14-rc2 and reworded commitmsg
v2: reworded commitmsg
---
 drivers/mmc/host/sdhci-of-arasan.c  | 11 ++++-------
 drivers/mmc/host/sdhci-of-dwcmshc.c |  8 +++++---
 drivers/mmc/host/sdhci.c            |  3 +--
 3 files changed, 10 insertions(+), 12 deletions(-)

diff --git a/drivers/mmc/host/sdhci-of-arasan.c b/drivers/mmc/host/sdhci-of-arasan.c
index 737e2bfdedc2..f2a6441ab540 100644
--- a/drivers/mmc/host/sdhci-of-arasan.c
+++ b/drivers/mmc/host/sdhci-of-arasan.c
@@ -452,8 +452,7 @@ static const struct sdhci_ops sdhci_arasan_cqe_ops = {
 static const struct sdhci_pltfm_data sdhci_arasan_cqe_pdata = {
 	.ops = &sdhci_arasan_cqe_ops,
 	.quirks = SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN,
-	.quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN |
-			SDHCI_QUIRK2_CLOCK_DIV_ZERO_BROKEN,
+	.quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN,
 };
 
 #ifdef CONFIG_PM_SLEEP
@@ -1118,7 +1117,6 @@ static const struct sdhci_pltfm_data sdhci_arasan_pdata = {
 	.ops = &sdhci_arasan_ops,
 	.quirks = SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN,
 	.quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN |
-			SDHCI_QUIRK2_CLOCK_DIV_ZERO_BROKEN |
 			SDHCI_QUIRK2_STOP_WITH_TC,
 };
 
@@ -1141,7 +1139,6 @@ static const struct sdhci_pltfm_data sdhci_keembay_emmc_pdata = {
 		SDHCI_QUIRK_32BIT_DMA_SIZE |
 		SDHCI_QUIRK_32BIT_ADMA_SIZE,
 	.quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN |
-		SDHCI_QUIRK2_CLOCK_DIV_ZERO_BROKEN |
 		SDHCI_QUIRK2_CAPS_BIT63_FOR_HS400 |
 		SDHCI_QUIRK2_STOP_WITH_TC |
 		SDHCI_QUIRK2_BROKEN_64_BIT_DMA,
@@ -1156,7 +1153,6 @@ static const struct sdhci_pltfm_data sdhci_keembay_sd_pdata = {
 		SDHCI_QUIRK_32BIT_DMA_SIZE |
 		SDHCI_QUIRK_32BIT_ADMA_SIZE,
 	.quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN |
-		SDHCI_QUIRK2_CLOCK_DIV_ZERO_BROKEN |
 		SDHCI_QUIRK2_CARD_ON_NEEDS_BUS_ON |
 		SDHCI_QUIRK2_STOP_WITH_TC |
 		SDHCI_QUIRK2_BROKEN_64_BIT_DMA,
@@ -1171,7 +1167,6 @@ static const struct sdhci_pltfm_data sdhci_keembay_sdio_pdata = {
 		SDHCI_QUIRK_32BIT_DMA_SIZE |
 		SDHCI_QUIRK_32BIT_ADMA_SIZE,
 	.quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN |
-		SDHCI_QUIRK2_CLOCK_DIV_ZERO_BROKEN |
 		SDHCI_QUIRK2_HOST_OFF_CARD_ON |
 		SDHCI_QUIRK2_BROKEN_64_BIT_DMA,
 };
@@ -1197,7 +1192,6 @@ static struct sdhci_arasan_of_data intel_lgm_sdxc_data = {
 static const struct sdhci_pltfm_data sdhci_arasan_zynqmp_pdata = {
 	.ops = &sdhci_arasan_ops,
 	.quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN |
-			SDHCI_QUIRK2_CLOCK_DIV_ZERO_BROKEN |
 			SDHCI_QUIRK2_STOP_WITH_TC,
 };
 
@@ -1502,6 +1496,9 @@ static int sdhci_arasan_add_host(struct sdhci_arasan_data *sdhci_arasan)
 	bool dma64;
 	int ret;
 
+	if (sdhci_pltfm_clk_get_max_clock(host) <= 25000000)
+		host->quirks2 |= SDHCI_QUIRK2_CLOCK_DIV_ZERO_BROKEN;
+
 	if (!sdhci_arasan->has_cqe)
 		return sdhci_add_host(host);
 
diff --git a/drivers/mmc/host/sdhci-of-dwcmshc.c b/drivers/mmc/host/sdhci-of-dwcmshc.c
index bac874ab0b33..b6b7c4068e90 100644
--- a/drivers/mmc/host/sdhci-of-dwcmshc.c
+++ b/drivers/mmc/host/sdhci-of-dwcmshc.c
@@ -283,14 +283,13 @@ static const struct sdhci_pltfm_data sdhci_dwcmshc_rk3568_pdata = {
 	.ops = &sdhci_dwcmshc_rk3568_ops,
 	.quirks = SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN |
 		  SDHCI_QUIRK_BROKEN_TIMEOUT_VAL,
-	.quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN |
-		   SDHCI_QUIRK2_CLOCK_DIV_ZERO_BROKEN,
+	.quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN,
 };
 
 static int dwcmshc_rk3568_init(struct sdhci_host *host, struct dwcmshc_priv *dwc_priv)
 {
-	int err;
 	struct rk3568_priv *priv = dwc_priv->priv;
+	int err;
 
 	priv->rockchip_clks[0].id = "axi";
 	priv->rockchip_clks[1].id = "block";
@@ -318,6 +317,9 @@ static int dwcmshc_rk3568_init(struct sdhci_host *host, struct dwcmshc_priv *dwc
 	sdhci_writel(host, 0, DWCMSHC_EMMC_DLL_TXCLK);
 	sdhci_writel(host, 0, DWCMSHC_EMMC_DLL_STRBIN);
 
+	if (sdhci_pltfm_clk_get_max_clock(host) <= 25000000)
+		host->quirks2 |= SDHCI_QUIRK2_CLOCK_DIV_ZERO_BROKEN;
+
 	return 0;
 }
 
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index 0993f7d0ce8e..cfa314e659bc 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -1905,8 +1905,7 @@ u16 sdhci_calc_clk(struct sdhci_host *host, unsigned int clock,
 			/* Version 3.00 divisors must be a multiple of 2. */
 			if (host->max_clk <= clock) {
 				div = 1;
-				if ((host->quirks2 & SDHCI_QUIRK2_CLOCK_DIV_ZERO_BROKEN)
-					&& host->max_clk <= 25000000)
+				if (host->quirks2 & SDHCI_QUIRK2_CLOCK_DIV_ZERO_BROKEN)
 					div = 2;
 			} else {
 				for (div = 2; div < SDHCI_MAX_DIV_SPEC_300;
-- 
2.30.2