diff --git a/drivers/media/platform/cadence/cdns-csi2rx.c b/drivers/media/platform/cadence/cdns-csi2rx.c index 9755d1c8ceb9ba..c9b80ac5cca5a2 100644 --- a/drivers/media/platform/cadence/cdns-csi2rx.c +++ b/drivers/media/platform/cadence/cdns-csi2rx.c @@ -13,6 +13,7 @@ #include #include #include +#include #include #include @@ -68,6 +69,9 @@ struct csi2rx_priv { struct clk *sys_clk; struct clk *p_clk; struct clk *pixel_clk[CSI2RX_STREAMS_MAX]; + struct reset_control *sys_rst; + struct reset_control *p_rst; + struct reset_control *pixel_rst[CSI2RX_STREAMS_MAX]; struct phy *dphy; u8 lanes[CSI2RX_LANES_MAX]; @@ -112,6 +116,7 @@ static int csi2rx_start(struct csi2rx_priv *csi2rx) if (ret) return ret; + reset_control_deassert(csi2rx->p_rst); csi2rx_reset(csi2rx); reg = csi2rx->num_lanes << 8; @@ -154,6 +159,8 @@ static int csi2rx_start(struct csi2rx_priv *csi2rx) if (ret) goto err_disable_pixclk; + reset_control_deassert(csi2rx->pixel_rst[i]); + writel(CSI2RX_STREAM_CFG_FIFO_MODE_LARGE_BUF, csi2rx->base + CSI2RX_STREAM_CFG_REG(i)); @@ -169,13 +176,16 @@ static int csi2rx_start(struct csi2rx_priv *csi2rx) if (ret) goto err_disable_pixclk; + reset_control_deassert(csi2rx->sys_rst); clk_disable_unprepare(csi2rx->p_clk); return 0; err_disable_pixclk: - for (; i > 0; i--) + for (; i > 0; i--) { + reset_control_assert(csi2rx->pixel_rst[i - 1]); clk_disable_unprepare(csi2rx->pixel_clk[i - 1]); + } err_disable_pclk: clk_disable_unprepare(csi2rx->p_clk); @@ -188,14 +198,17 @@ static void csi2rx_stop(struct csi2rx_priv *csi2rx) unsigned int i; clk_prepare_enable(csi2rx->p_clk); + reset_control_assert(csi2rx->sys_rst); clk_disable_unprepare(csi2rx->sys_clk); for (i = 0; i < csi2rx->max_streams; i++) { writel(0, csi2rx->base + CSI2RX_STREAM_CTRL_REG(i)); + reset_control_assert(csi2rx->pixel_rst[i]); clk_disable_unprepare(csi2rx->pixel_clk[i]); } + reset_control_assert(csi2rx->p_rst); clk_disable_unprepare(csi2rx->p_clk); if (v4l2_subdev_call(csi2rx->source_subdev, video, s_stream, false)) @@ -299,6 +312,16 @@ static int csi2rx_get_resources(struct csi2rx_priv *csi2rx, return PTR_ERR(csi2rx->p_clk); } + csi2rx->sys_rst = devm_reset_control_get_optional_exclusive(&pdev->dev, + "sys"); + if (IS_ERR(csi2rx->sys_rst)) + return PTR_ERR(csi2rx->sys_rst); + + csi2rx->p_rst = devm_reset_control_get_optional_exclusive(&pdev->dev, + "reg_bank"); + if (IS_ERR(csi2rx->p_rst)) + return PTR_ERR(csi2rx->p_rst); + csi2rx->dphy = devm_phy_optional_get(&pdev->dev, "dphy"); if (IS_ERR(csi2rx->dphy)) { dev_err(&pdev->dev, "Couldn't get external D-PHY\n"); @@ -349,14 +372,21 @@ static int csi2rx_get_resources(struct csi2rx_priv *csi2rx, } for (i = 0; i < csi2rx->max_streams; i++) { - char clk_name[16]; + char name[16]; - snprintf(clk_name, sizeof(clk_name), "pixel_if%u_clk", i); - csi2rx->pixel_clk[i] = devm_clk_get(&pdev->dev, clk_name); + snprintf(name, sizeof(name), "pixel_if%u_clk", i); + csi2rx->pixel_clk[i] = devm_clk_get(&pdev->dev, name); if (IS_ERR(csi2rx->pixel_clk[i])) { - dev_err(&pdev->dev, "Couldn't get clock %s\n", clk_name); + dev_err(&pdev->dev, "Couldn't get clock %s\n", name); return PTR_ERR(csi2rx->pixel_clk[i]); } + + snprintf(name, sizeof(name), "pixel_if%u", i); + csi2rx->pixel_rst[i] = + devm_reset_control_get_optional_exclusive(&pdev->dev, + name); + if (IS_ERR(csi2rx->pixel_rst[i])) + return PTR_ERR(csi2rx->pixel_rst[i]); } return 0;