[PATCH v2 08/15] [media] mtk-mipicsi: enable/disable ana clk

[Stu Hsieh <stu.hsieh@xxxxxxxxxxxx>]

This patch enable/disable ana clk when power on/off

Signed-off-by: Stu Hsieh <stu.hsieh@xxxxxxxxxxxx>
---
 .../media/platform/mtk-mipicsi/mtk_mipicsi.c  | 39 +++++++++++++++++++
 1 file changed, 39 insertions(+)

diff --git a/drivers/media/platform/mtk-mipicsi/mtk_mipicsi.c b/drivers/media/platform/mtk-mipicsi/mtk_mipicsi.c
index c92ffe6684ef..8a4079f0ed9b 100644
--- a/drivers/media/platform/mtk-mipicsi/mtk_mipicsi.c
+++ b/drivers/media/platform/mtk-mipicsi/mtk_mipicsi.c
@@ -163,6 +163,41 @@ struct mtk_mipicsi_dev {
 		V4L2_MBUS_PCLK_SAMPLE_FALLING |	\
 		V4L2_MBUS_DATA_ACTIVE_HIGH)
 
+static void mtk_mipicsi_ana_clk_enable(void __iomem *base, bool enable)
+{
+	if (enable) {
+		writel(1UL | readl(base + MIPI_RX_ANA00_CSI),
+			base + MIPI_RX_ANA00_CSI);
+		writel(1UL | readl(base + MIPI_RX_ANA04_CSI),
+			base + MIPI_RX_ANA04_CSI);
+		writel(1UL | readl(base + MIPI_RX_ANA08_CSI),
+			base + MIPI_RX_ANA08_CSI);
+		writel(1UL | readl(base + MIPI_RX_ANA0C_CSI),
+			base + MIPI_RX_ANA0C_CSI);
+		writel(1UL | readl(base + MIPI_RX_ANA10_CSI),
+			base + MIPI_RX_ANA10_CSI);
+		writel(1UL | readl(base + MIPI_RX_ANA20_CSI),
+			base + MIPI_RX_ANA20_CSI);
+		writel(1UL | readl(base + MIPI_RX_ANA24_CSI),
+			base + MIPI_RX_ANA24_CSI);
+	} else {
+		writel(~1UL & readl(base + MIPI_RX_ANA00_CSI),
+			base + MIPI_RX_ANA00_CSI);
+		writel(~1UL & readl(base + MIPI_RX_ANA04_CSI),
+			base + MIPI_RX_ANA04_CSI);
+		writel(~1UL & readl(base + MIPI_RX_ANA08_CSI),
+			base + MIPI_RX_ANA08_CSI);
+		writel(~1UL & readl(base + MIPI_RX_ANA0C_CSI),
+			base + MIPI_RX_ANA0C_CSI);
+		writel(~1UL & readl(base + MIPI_RX_ANA10_CSI),
+			base + MIPI_RX_ANA10_CSI);
+		writel(~1UL & readl(base + MIPI_RX_ANA20_CSI),
+			base + MIPI_RX_ANA20_CSI);
+		writel(~1UL & readl(base + MIPI_RX_ANA24_CSI),
+			base + MIPI_RX_ANA24_CSI);
+	}
+}
+
 static int get_subdev_register(const struct soc_camera_device *icd,
 	struct v4l2_dbg_register *reg)
 {
@@ -796,6 +831,8 @@ static int mtk_mipicsi_pm_suspend(struct device *dev)
 	for (i = 0; i < mipicsi->clk_num; ++i)
 		clk_disable_unprepare(mipicsi->clk[i]);
 
+	mtk_mipicsi_ana_clk_enable(mipicsi->ana, false);
+
 	if (mipicsi->larb_pdev != NULL)
 		mtk_smi_larb_put(mipicsi->larb_pdev);
 
@@ -833,6 +870,8 @@ static int mtk_mipicsi_pm_resume(struct device *dev)
 			return ret;
 	}
 
+	mtk_mipicsi_ana_clk_enable(mipicsi->ana, true);
+
 	/* enable digtal clock */
 	for (i = 0; i < mipicsi->clk_num; ++i)
 		(void)clk_prepare_enable(mipicsi->clk[i]);
-- 
2.18.0