[PATCH 3/4] sdio: mediatek: support sdr104_clk_delay in sdio
From: Yong Mao <hidden>
Date: 2016-11-08 06:10:38
Also in:
linux-devicetree, linux-mediatek, linux-mmc, lkml
Subsystem:
mediatek mmc/sd/sdio driver, multimedia card (mmc), secure digital (sd) and sdio subsystem, the rest · Maintainers:
Chaotian Jing, Ulf Hansson, Linus Torvalds
From: yong mao <redacted> In order to let sdio run stable with 200M clock, we should setup the value of clock delay. Signed-off-by: Yong Mao <redacted> Signed-off-by: Chaotian Jing <chaotian.jing@mediatek.com> --- drivers/mmc/host/mtk-sd.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-)
diff --git a/drivers/mmc/host/mtk-sd.c b/drivers/mmc/host/mtk-sd.c
index 37edf30..fba28f2 100644
--- a/drivers/mmc/host/mtk-sd.c
+++ b/drivers/mmc/host/mtk-sd.c@@ -213,6 +213,7 @@ #define MSDC_PAD_TUNE_DATRRDLY (0x1f << 8) /* RW */ #define MSDC_PAD_TUNE_CMDRDLY (0x1f << 16) /* RW */ +#define MSDC_PAD_TUNE_CLKTDLY (0x1f << 27) /* RW */ #define PAD_DS_TUNE_DLY1 (0x1f << 2) /* RW */ #define PAD_DS_TUNE_DLY2 (0x1f << 7) /* RW */
@@ -335,6 +336,7 @@ struct msdc_host { unsigned char timing; bool vqmmc_enabled; u32 hs400_ds_delay; + u32 sdr104_clk_delay; bool hs400_mode; /* current eMMC will run@hs400 mode */ struct msdc_save_para save_para; /* used when gate HCLK */ struct msdc_tune_para def_tune_para; /* default tune setting */
@@ -1230,7 +1232,8 @@ static void msdc_init_hw(struct msdc_host *host) writel(val, host->base + MSDC_INT); spin_unlock_irqrestore(&host->irqlock, flags); - writel(0, host->base + MSDC_PAD_TUNE); + sdr_set_field(host->base + MSDC_PAD_TUNE, + MSDC_PAD_TUNE_CLKTDLY, host->sdr104_clk_delay); writel(0, host->base + MSDC_IOCON); sdr_set_field(host->base + MSDC_IOCON, MSDC_IOCON_DDLSEL, 0); writel(0x403c0046, host->base + MSDC_PATCH_BIT);
@@ -1671,6 +1674,11 @@ static int msdc_drv_probe(struct platform_device *pdev) dev_dbg(&pdev->dev, "hs400-ds-delay: %x\n", host->hs400_ds_delay); + if (!of_property_read_u32(pdev->dev.of_node, "sdr104-clk-delay", + &host->sdr104_clk_delay)) + dev_dbg(&pdev->dev, "sdr104-clk-delay: %x\n", + host->sdr104_clk_delay); + host->dev = &pdev->dev; host->mmc = mmc; host->src_clk_freq = clk_get_rate(host->src_clk);
--
1.7.9.5