diff mbox series

[RFC,v6,4/9] clk: tegra: Add Tegra210 CSI TPG clock gate

Message ID 1585963507-12610-5-git-send-email-skomatineni@nvidia.com
State Changes Requested
Headers show
Series Add Tegra driver for video capture | expand

Commit Message

Sowjanya Komatineni April 4, 2020, 1:25 a.m. UTC 
Tegra210 CSI hardware internally uses PLLD for internal test pattern
generator logic.

PLLD_BASE register in CAR has a bit CSI_CLK_SOURCE to enable PLLD
out to CSI during TPG mode.

This patch adds this CSI TPG clock gate to Tegra210 clock driver
to allow Tegra video driver to ungate CSI TPG clock during TPG mode
and gate during non TPG mode.

Acked-by: Stephen Boyd <sboyd@kernel.org>
Signed-off-by: Sowjanya Komatineni <skomatineni@nvidia.com>
---
 drivers/clk/tegra/clk-tegra210.c | 7 +++++++
 1 file changed, 7 insertions(+)
diff mbox series

Patch

diff --git a/drivers/clk/tegra/clk-tegra210.c b/drivers/clk/tegra/clk-tegra210.c
index defe3b7..81a879b 100644
--- a/drivers/clk/tegra/clk-tegra210.c
+++ b/drivers/clk/tegra/clk-tegra210.c
@@ -3035,6 +3035,13 @@  static __init void tegra210_periph_clk_init(void __iomem *clk_base,
 					     periph_clk_enb_refcnt);
 	clks[TEGRA210_CLK_DSIB] = clk;
 
+	/* csi_tpg */
+	clk = clk_register_gate(NULL, "csi_tpg", "pll_d",
+				CLK_SET_RATE_PARENT, clk_base + PLLD_BASE,
+				23, 0, &pll_d_lock);
+	clk_register_clkdev(clk, "csi_tpg", NULL);
+	clks[TEGRA210_CLK_CSI_TPG] = clk;
+
 	/* la */
 	clk = tegra_clk_register_periph("la", la_parents,
 			ARRAY_SIZE(la_parents), &tegra210_la, clk_base,