[PATCH v4 1/5] clk: JZ4780: Add function for disable the second core.

周琰杰 (Zhou Yanjie)
2020-12-21T15:54:06Z

Add "jz4780_core1_disable()" for disable the second core of JZ4780,
prepare for later commits.

Signed-off-by: 周琰杰 (Zhou Yanjie) <zhouyanjie@wanyeetech.com>
Reviewed-by: Paul Cercueil <paul@crapouillou.net>
---

Notes:
v1->v2:
Add Paul Cercueil's Reviewed-by.

v2->v3:
No change.

v3->v4:
No change.

drivers/clk/ingenic/jz4780-cgu.c | 21 +++++++++++++++++++++
1 file changed, 21 insertions(+)

diff --git a/drivers/clk/ingenic/jz4780-cgu.c b/drivers/clk/ingenic/jz4780-cgu.c
index 0268d23..dcca74e 100644
--- a/drivers/clk/ingenic/jz4780-cgu.c
+++ b/drivers/clk/ingenic/jz4780-cgu.c
@@ -252,8 +252,29 @@ static int jz4780_core1_enable(struct clk_hw *hw)
return 0;
}

+static void jz4780_core1_disable(struct clk_hw *hw)
+{
+ struct ingenic_clk *ingenic_clk = to_ingenic_clk(hw);
+ struct ingenic_cgu *cgu = ingenic_clk->cgu;
+ unsigned long flags;
+ u32 lcr, clkgr1;
+
+ spin_lock_irqsave(&cgu->lock, flags);
+
+ lcr = readl(cgu->base + CGU_REG_LCR);
+ lcr |= LCR_PD_SCPU;
+ writel(lcr, cgu->base + CGU_REG_LCR);
+
+ clkgr1 = readl(cgu->base + CGU_REG_CLKGR1);
+ clkgr1 |= CLKGR1_CORE1;
+ writel(clkgr1, cgu->base + CGU_REG_CLKGR1);
+
+ spin_unlock_irqrestore(&cgu->lock, flags);
+}
+
static const struct clk_ops jz4780_core1_ops = {
.enable = jz4780_core1_enable,
+ .disable = jz4780_core1_disable,
};

static const s8 pll_od_encoding[16] = {
--
2.7.4