From mboxrd@z Thu Jan 1 00:00:00 1970 From: Shawn Lin Subject: [PATCH v2 6/6] mmc: dw_mmc-rockchip: add parsing of power control from DT Date: Sun, 7 Aug 2016 09:35:02 +0800 Message-ID: <1470533702-16567-1-git-send-email-shawn.lin@rock-chips.com> References: <1470533618-16312-1-git-send-email-shawn.lin@rock-chips.com> Return-path: In-Reply-To: <1470533618-16312-1-git-send-email-shawn.lin@rock-chips.com> Sender: linux-kernel-owner@vger.kernel.org To: Jaehoon Chung , Ulf Hansson Cc: Rob Herring , linux-mmc@vger.kernel.org, linux-kernel@vger.kernel.org, Heiko Stuebner , linux-rockchip@lists.infradead.org, devicetree@vger.kernel.org, Shawn Lin List-Id: devicetree@vger.kernel.org By default, the power io of dw_mmc is fixed which means we could only output high level voltage to indicate the power-on state. But that is not always correct as the usage of power io should be board specific. Let's expose it to dt for supporting this kind of specific design. Signed-off-by: Shawn Lin --- Changes in v2: - fix copy-paste err and typo 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 25eae35..2e51202 100644 --- a/drivers/mmc/host/dw_mmc-rockchip.c +++ b/drivers/mmc/host/dw_mmc-rockchip.c @@ -24,6 +24,7 @@ struct dw_mci_rockchip_priv_data { struct clk *drv_clk; struct clk *sample_clk; int default_sample_phase; + bool power_invert; }; static void dw_mci_rk3288_set_ios(struct dw_mci *host, struct mmc_ios *ios) @@ -67,6 +68,10 @@ static void dw_mci_rk3288_set_ios(struct dw_mci *host, struct mmc_ios *ios) if (!IS_ERR(priv->sample_clk)) clk_set_phase(priv->sample_clk, priv->default_sample_phase); + /* Make sure we need to invert the output of PWREN */ + if (priv->power_invert) + set_bit(DW_MMC_CARD_PWR_INVERT, &host->cur_slot->flags); + /* * Set the drive phase offset based on speed mode to achieve hold times. * @@ -267,6 +272,9 @@ static int dw_mci_rk3288_parse_dt(struct dw_mci *host) &priv->default_sample_phase)) priv->default_sample_phase = 0; + if (of_property_read_bool(np, "rockchip,power-invert")) + priv->power_invert = true; + priv->drv_clk = devm_clk_get(host->dev, "ciu-drive"); if (IS_ERR(priv->drv_clk)) dev_dbg(host->dev, "ciu_drv not available\n"); -- 2.3.7