From: adrian.hunter@intel.com (Adrian Hunter)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v3 11/15] mmc: sdhci-of-arasan: Add ability to export card clock
Date: Wed, 22 Jun 2016 15:35:06 +0300 [thread overview]
Message-ID: <576A85FA.2000309@intel.com> (raw)
In-Reply-To: <1466445414-11974-12-git-send-email-dianders@chromium.org>
On 20/06/16 20:56, Douglas Anderson wrote:
> Some SD/eMMC PHYs (like the PHY from Arasan that is designed to work
> with arasan,sdhci-5.1) need to know the card clock in order to function
> properly. Let's add the ability to expose this clock. Any PHY that
> needs to know the clock rate can add a reference and query the clock
> rate.
>
> At the moment we register a CLK_GET_RATE_NOCACHE clock that simply
> allows querying the clock. This allows us to be less intrusive with
> regards to the main SDHCI driver, which has complex logic for adjusting
> the SD clock. Right now we always fully power cycle the PHY when the
> clock changes and that gives the PHY a good chance to query our clock.
>
> Signed-off-by: Douglas Anderson <dianders@chromium.org>
> Reviewed-by: Heiko Stuebner <heiko@sntech.de>
> Tested-by: Heiko Stuebner <heiko@sntech.de>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
next prev parent reply other threads:[~2016-06-22 12:35 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-06-20 17:56 [PATCH v3 0/15] Changes to support 150 MHz eMMC on rk3399 Douglas Anderson
2016-06-20 17:56 ` [PATCH v3 01/15] phy: rockchip-emmc: give DLL some extra time to be ready Douglas Anderson
2016-06-20 19:23 ` Guenter Roeck
2016-06-20 19:30 ` Doug Anderson
2016-06-20 19:36 ` Guenter Roeck
2016-06-20 19:38 ` Doug Anderson
2016-06-20 17:56 ` [PATCH v3 02/15] phy: rockchip-emmc: configure frequency range and drive impedance Douglas Anderson
2016-06-20 17:56 ` [PATCH v3 03/15] phy: rockchip-emmc: configure default output tap delay Douglas Anderson
2016-06-20 17:56 ` [PATCH v3 04/15] phy: rockchip-emmc: reindent the register definitions Douglas Anderson
2016-06-20 17:56 ` [PATCH v3 05/15] phy: rockchip-emmc: Increase lock time allowance Douglas Anderson
2016-06-20 19:29 ` Guenter Roeck
2016-06-20 19:36 ` Doug Anderson
2016-06-20 19:38 ` Guenter Roeck
2016-06-20 17:56 ` [PATCH v3 06/15] mmc: sdhci-of-arasan: Always power the PHY off/on when clock changes Douglas Anderson
2016-06-22 12:34 ` Adrian Hunter
2016-06-20 17:56 ` [PATCH v3 08/15] mmc: sdhci-of-arasan: Properly set corecfg_baseclkfreq on rk3399 Douglas Anderson
2016-06-22 12:34 ` Adrian Hunter
2016-06-20 17:56 ` [PATCH v3 09/15] arm64: dts: rockchip: Add soc-ctl-syscon to sdhci for rk3399 Douglas Anderson
2016-06-22 16:30 ` Heiko Stübner
2016-06-20 17:56 ` [PATCH v3 11/15] mmc: sdhci-of-arasan: Add ability to export card clock Douglas Anderson
2016-06-22 12:35 ` Adrian Hunter [this message]
2016-06-20 17:56 ` [PATCH v3 12/15] Documentation: phy: Let the rockchip eMMC PHY get an exported " Douglas Anderson
2016-06-20 17:56 ` [PATCH v3 13/15] phy: rockchip-emmc: Minor code cleanup in rockchip_emmc_phy_power_on/off() Douglas Anderson
2016-06-20 17:56 ` [PATCH v3 14/15] phy: rockchip-emmc: Set phyctrl_frqsel based on card clock Douglas Anderson
2016-06-20 18:14 ` Heiko Stübner
2016-06-20 17:56 ` [PATCH v3 15/15] arm64: dts: rockchip: Provide emmcclk to PHY for rk3399 Douglas Anderson
2016-06-22 16:31 ` Heiko Stübner
2016-06-20 18:17 ` [PATCH v3 0/15] Changes to support 150 MHz eMMC on rk3399 Heiko Stübner
2016-06-22 15:23 ` Ulf Hansson
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