[PATCH 4/8] clk: rk3399: Disable PCIE_PHY clock

Jagan Teki
2020-04-25T11:03:50Z

Add PCIE_PHY clock disablement support on rk3399
clock driver.

This would trigger if the PCIe PHY driver failed to
initialize or power on the PHY.

Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
---
drivers/clk/rockchip/clk_rk3399.c | 17 +++++++++++++++++
1 file changed, 17 insertions(+)

diff --git a/drivers/clk/rockchip/clk_rk3399.c b/drivers/clk/rockchip/clk_rk3399.c
index 8e069fbade..2d447f96f7 100644
--- a/drivers/clk/rockchip/clk_rk3399.c
+++ b/drivers/clk/rockchip/clk_rk3399.c
@@ -1085,6 +1085,22 @@ static int rk3399_clk_enable(struct clk *clk)
return 0;
}

+static int rk3399_clk_disable(struct clk *clk)
+{
+ struct rk3399_clk_priv *priv = dev_get_priv(clk->dev);
+
+ switch (clk->id) {
+ case SCLK_PCIEPHY_REF:
+ rk_clrreg(&priv->cru->clksel_con[18], BIT(7));
+ break;
+ default:
+ debug("%s: unsupported clk %ld\n", __func__, clk->id);
+ return -ENOENT;
+ }
+
+ return 0;
+}
+
static struct clk_ops rk3399_clk_ops = {
.get_rate = rk3399_clk_get_rate,
.set_rate = rk3399_clk_set_rate,
@@ -1092,6 +1108,7 @@ static struct clk_ops rk3399_clk_ops = {
.set_parent = rk3399_clk_set_parent,
#endif
.enable = rk3399_clk_enable,
+ .disable = rk3399_clk_disable,
};

#ifdef CONFIG_SPL_BUILD
--
2.17.1