From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ritesh Harjani Subject: [PATCH 06/10] mmc: sdhci: Add get_clk_div callback support Date: Thu, 11 Aug 2016 19:22:53 +0530 Message-ID: <1470923574-411-2-git-send-email-riteshh@codeaurora.org> References: <1470923574-411-1-git-send-email-riteshh@codeaurora.org> Return-path: In-Reply-To: <1470923574-411-1-git-send-email-riteshh@codeaurora.org> Sender: linux-arm-msm-owner@vger.kernel.org To: shawn.lin@rock-chips.com, ulf.hansson@linaro.org, linux-mmc@vger.kernel.org, adrian.hunter@intel.com Cc: linux-arm-msm@vger.kernel.org, georgi.djakov@linaro.org, alex.lemberg@sandisk.com, mateusz.nowak@intel.com, Yuliy.Izrailov@sandisk.com, asutoshd@codeaurora.org, kdorfman@codeaurora.org, david.griego@linaro.org, stummala@codeaurora.org, venkatg@codeaurora.org, Ritesh Harjani List-Id: linux-mmc@vger.kernel.org Few controllers (like MSM) may have to override div in certain cases. Hence provide a callback to get the div value for their driver. Signed-off-by: Sahitya Tummala Signed-off-by: Ritesh Harjani --- drivers/mmc/host/sdhci.c | 8 ++++++++ drivers/mmc/host/sdhci.h | 1 + 2 files changed, 9 insertions(+) diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c index cd65d47..cc3d6f2 100644 --- a/drivers/mmc/host/sdhci.c +++ b/drivers/mmc/host/sdhci.c @@ -1318,6 +1318,14 @@ u16 sdhci_calc_clk(struct sdhci_host *host, unsigned int clock, clock_set: if (real_div) *actual_clock = (host->max_clk * clk_mul) / real_div; + /* + * Few controllers may have to override div + * here. Hence provide a callback to get the + * div value for them. + */ + if (host->ops->get_clk_div) + div = host->ops->get_clk_div(host, div); + clk |= (div & SDHCI_DIV_MASK) << SDHCI_DIVIDER_SHIFT; clk |= ((div & SDHCI_DIV_HI_MASK) >> SDHCI_DIV_MASK_LEN) << SDHCI_DIVIDER_HI_SHIFT; diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h index 0411c9f..4701001 100644 --- a/drivers/mmc/host/sdhci.h +++ b/drivers/mmc/host/sdhci.h @@ -562,6 +562,7 @@ struct sdhci_ops { struct mmc_card *card, unsigned int max_dtr, int host_drv, int card_drv, int *drv_type); + int (*get_clk_div)(struct sdhci_host *host, int div); }; #ifdef CONFIG_MMC_SDHCI_IO_ACCESSORS -- 1.8.2.1