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Date: Fri, 13 Feb 2015 15:22:20 +0800 From: Addy Ke <addy.ke@...k-chips.com> To: jh80.chung@...sung.com, ulf.hansson@...aro.org, olof@...om.net, dianders@...omium.org Cc: heiko@...ech.de, cf@...k-chips.com, lintao@...k-chips.com, huangtao@...k-chips.com, linux-kernel@...r.kernel.org, linux-mmc@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, linux-rockchip@...ts.infradead.org, Addy Ke <addy.ke@...k-chips.com> Subject: [PATCH] mmc: dw_mmc: rockchip: add support MMC_CAP_RUNTIME_RESUME capability To support HS200 and UHS mode, mmc core will call init_card() to execute tuning: - sdio: init_card can be executed at runtime resume. - sd and mmc: init_card can be executed at resume or runtime resume, which depends on MMC_CAP_RUNTIME_RESUME capability. On rk3288 SoC, host will get DRTO interrupt when host send command to read tuning data. This will spend more than 111ms: drto_ms = drto_clks * 1000 / bus_hz = 111ms. And the total tuning time will be more than 400ms. So we should add MMC_CAP_RUNTIME_RESUME capability to execute tuning at runtime resume. Only if we do so, can we pass resume test. Signed-off-by: Addy Ke <addy.ke@...k-chips.com> --- drivers/mmc/host/dw_mmc-rockchip.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/mmc/host/dw_mmc-rockchip.c b/drivers/mmc/host/dw_mmc-rockchip.c index e2a726a..e5f57b5 100644 --- a/drivers/mmc/host/dw_mmc-rockchip.c +++ b/drivers/mmc/host/dw_mmc-rockchip.c @@ -76,12 +76,20 @@ static int dw_mci_rockchip_init(struct dw_mci *host) return 0; } +/* Common capabilities of RK3288 SoC */ +static unsigned long dw_mci_rk3288_dwmmc_caps[4] = { + MMC_CAP_RUNTIME_RESUME, /* emmc */ + MMC_CAP_RUNTIME_RESUME, /* sdmmc */ + 0, /* sdio0 */ + 0, /* sdio1 */ +}; static const struct dw_mci_drv_data rk2928_drv_data = { .prepare_command = dw_mci_rockchip_prepare_command, .init = dw_mci_rockchip_init, }; static const struct dw_mci_drv_data rk3288_drv_data = { + .caps = dw_mci_rk3288_dwmmc_caps, .prepare_command = dw_mci_rockchip_prepare_command, .set_ios = dw_mci_rk3288_set_ios, .setup_clock = dw_mci_rk3288_setup_clock, -- 1.8.3.2 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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