From: Ludovic Barre <ludovic.Barre@st.com>
To: Ulf Hansson <ulf.hansson@linaro.org>, Rob Herring <robh+dt@kernel.org>
Cc: Maxime Coquelin <mcoquelin.stm32@gmail.com>,
Alexandre Torgue <alexandre.torgue@st.com>,
<benjamin.gaignard@linaro.org>,
Gerald Baeza <gerald.baeza@st.com>,
Loic Pallardy <loic.pallardy@st.com>,
<linux-arm-kernel@lists.infradead.org>,
<linux-kernel@vger.kernel.org>, <devicetree@vger.kernel.org>,
<linux-mmc@vger.kernel.org>,
<linux-stm32@st-md-mailman.stormreply.com>,
Ludovic Barre <ludovic.barre@st.com>
Subject: [PATCH V2 24/27] mmc: mmci: add clock divider for stm32 sdmmc
Date: Tue, 18 Sep 2018 12:55:41 +0200 [thread overview]
Message-ID: <1537268144-21152-25-git-send-email-ludovic.Barre@st.com> (raw)
In-Reply-To: <1537268144-21152-1-git-send-email-ludovic.Barre@st.com>
From: Ludovic Barre <ludovic.barre@st.com>
The STM32 sdmmc variant has a different clock divider.
Signed-off-by: Ludovic Barre <ludovic.barre@st.com>
---
drivers/mmc/host/mmci.c | 2 ++
drivers/mmc/host/mmci.h | 2 ++
2 files changed, 4 insertions(+)
diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c
index 6b3c33f..d622fbb 100644
--- a/drivers/mmc/host/mmci.c
+++ b/drivers/mmc/host/mmci.c
@@ -1834,6 +1834,8 @@ static int mmci_probe(struct amba_device *dev,
*/
if (variant->st_clkdiv)
mmc->f_min = DIV_ROUND_UP(host->mclk, 257);
+ else if (variant->stm32_clkdiv)
+ mmc->f_min = DIV_ROUND_UP(host->mclk, 2046);
else if (variant->explicit_mclk_control)
mmc->f_min = clk_round_rate(host->clk, 100000);
else
diff --git a/drivers/mmc/host/mmci.h b/drivers/mmc/host/mmci.h
index 2d46a08..dcb1255 100644
--- a/drivers/mmc/host/mmci.h
+++ b/drivers/mmc/host/mmci.h
@@ -216,6 +216,7 @@ struct mmci_host;
* @data_cmd_enable: enable value for data commands.
* @st_sdio: enable ST specific SDIO logic
* @st_clkdiv: true if using a ST-specific clock divider algorithm
+ * @stm32_clkdiv: true if using a STM32-specific clock divider algorithm
* @datactrl_mask_ddrmode: ddr mode mask in datactrl register.
* @blksz_datactrl16: true if Block size is at b16..b30 position in datactrl register
* @blksz_datactrl4: true if Block size is at b4..b16 position in datactrl
@@ -270,6 +271,7 @@ struct variant_data {
bool datacnt_useless;
bool st_sdio;
bool st_clkdiv;
+ bool stm32_clkdiv;
bool blksz_datactrl16;
bool blksz_datactrl4;
u32 pwrreg_powerup;
--
2.7.4
next prev parent reply other threads:[~2018-09-18 10:57 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-09-18 10:55 [PATCH V2 00/27] mmc: mmci: add sdmmc variant for stm32 Ludovic Barre
2018-09-18 10:55 ` [PATCH V2 01/27] mmc: mmci: internalize dma map/unmap into mmci dma functions Ludovic Barre
2018-09-18 10:55 ` [PATCH V2 02/27] mmc: mmci: internalize dma_inprogress " Ludovic Barre
2018-09-20 17:56 ` Ulf Hansson
2018-09-21 7:42 ` Ludovic BARRE
2018-09-18 10:55 ` [PATCH V2 03/27] mmc: mmci: convert dma_setup callback to return an int Ludovic Barre
2018-09-18 10:55 ` [PATCH V2 04/27] mmc: mmci: introduce dma_priv pointer to mmci_host Ludovic Barre
2018-09-18 10:55 ` [PATCH V2 05/27] mmc: mmci: move mmci next cookie to mci host Ludovic Barre
2018-09-18 10:55 ` [PATCH V2 06/27] mmc: mmci: merge prepare data functions Ludovic Barre
2018-09-18 10:55 ` [PATCH V2 07/27] mmc: mmci: add prepare/unprepare_data callbacks Ludovic Barre
2018-09-18 10:55 ` [PATCH V2 08/27] mmc: mmci: add get_next_data callback Ludovic Barre
2018-09-18 10:55 ` [PATCH V2 09/27] mmc: mmci: modify dma_setup callback Ludovic Barre
2018-09-18 10:55 ` [PATCH V2 10/27] mmc: mmci: add dma_release callback Ludovic Barre
2018-09-18 10:55 ` [PATCH V2 11/27] mmc: mmci: add dma_start callback Ludovic Barre
2018-09-18 10:55 ` [PATCH V2 12/27] mmc: mmci: add dma_finalize callback Ludovic Barre
2018-09-18 10:55 ` [PATCH V2 13/27] mmc: mmci: add dma_error callback Ludovic Barre
2018-09-18 10:55 ` [PATCH V2 14/27] mmc: mmci: add validate_data callback Ludovic Barre
2018-09-18 10:55 ` [PATCH V2 15/27] mmc: mmci: add set_clk/pwrreg callbacks Ludovic Barre
2018-09-18 10:55 ` [PATCH V2 16/27] mmc: mmci: add datactrl block size variant property Ludovic Barre
2018-09-18 10:55 ` [PATCH V2 17/27] mmc: mmci: expand startbiterr to irqmask and error check Ludovic Barre
2018-09-18 10:55 ` [PATCH V2 18/27] mmc: mmci: add variant properties to define cpsm & cmdresp bits Ludovic Barre
2018-09-18 10:55 ` [PATCH V2 19/27] mmc: mmci: add variant property to define dpsm bit Ludovic Barre
2018-09-18 10:55 ` [PATCH V2 20/27] mmc: mmci: add variant property to define irq pio mask Ludovic Barre
2018-09-18 10:55 ` [PATCH V2 21/27] mmc: mmci: add variant property to write datactrl before command Ludovic Barre
2018-09-18 10:55 ` [PATCH V2 22/27] mmc: mmci: add variant property to not read datacnt Ludovic Barre
2018-09-18 10:55 ` [PATCH V2 23/27] mmc: mmci: add variant property to request a reset Ludovic Barre
2018-09-18 10:55 ` Ludovic Barre [this message]
2018-09-18 10:55 ` [PATCH V2 25/27] mmc: mmci: add stm32 sdmmc registers Ludovic Barre
2018-09-18 10:55 ` [PATCH V2 26/27] mmc: mmci: add DT bindings for STM32 sdmmc Ludovic Barre
2018-09-18 10:55 ` [PATCH V2 27/27] mmc: mmci: add stm32 sdmmc variant Ludovic Barre
2018-09-21 9:45 [PATCH V2 00/27] mmc: mmci: add sdmmc variant for stm32 Ludovic Barre
2018-09-21 9:46 ` [PATCH V2 24/27] mmc: mmci: add clock divider for stm32 sdmmc Ludovic Barre
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