[PATCH AUTOSEL 4.19 01/25] clk: rockchip: rk3036: fix up the sclk_sfc parent error

[PATCH AUTOSEL 4.19 01/25] clk: rockchip: rk3036: fix up the sclk_sfc parent error

[Sasha Levin]

From: Jon Lin <jon.lin@rock-chips.com>

[ Upstream commit 0be3df186f870cbde56b223c1ad7892109c9c440 ]

Choose the correct pll

Signed-off-by: Elaine Zhang <zhangqing@rock-chips.com>
Signed-off-by: Jon Lin <jon.lin@rock-chips.com>
Acked-by: Stephen Boyd <sboyd@kernel.org>
Link: https://lore.kernel.org/r/20210713094456.23288-5-jon.lin@rock-chips.com
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/clk/rockchip/clk-rk3036.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/clk/rockchip/clk-rk3036.c b/drivers/clk/rockchip/clk-rk3036.c
index c3001980dbdc..ee3f6462620f 100644
--- a/drivers/clk/rockchip/clk-rk3036.c
+++ b/drivers/clk/rockchip/clk-rk3036.c
@@ -128,6 +128,7 @@ PNAME(mux_pll_src_3plls_p)	= { "apll", "dpll", "gpll" };
 PNAME(mux_timer_p)		= { "xin24m", "pclk_peri_src" };
 
 PNAME(mux_pll_src_apll_dpll_gpll_usb480m_p)	= { "apll", "dpll", "gpll", "usb480m" };
+PNAME(mux_pll_src_dmyapll_dpll_gpll_xin24_p)   = { "dummy_apll", "dpll", "gpll", "xin24m" };
 
 PNAME(mux_mmc_src_p)	= { "apll", "dpll", "gpll", "xin24m" };
 PNAME(mux_i2s_pre_p)	= { "i2s_src", "i2s_frac", "ext_i2s", "xin12m" };
@@ -347,7 +348,7 @@ static struct rockchip_clk_branch rk3036_clk_branches[] __initdata = {
 			RK2928_CLKSEL_CON(16), 8, 2, MFLAGS, 10, 5, DFLAGS,
 			RK2928_CLKGATE_CON(10), 4, GFLAGS),
 
-	COMPOSITE(SCLK_SFC, "sclk_sfc", mux_pll_src_apll_dpll_gpll_usb480m_p, 0,
+	COMPOSITE(SCLK_SFC, "sclk_sfc", mux_pll_src_dmyapll_dpll_gpll_xin24_p, 0,
 			RK2928_CLKSEL_CON(16), 0, 2, MFLAGS, 2, 5, DFLAGS,
 			RK2928_CLKGATE_CON(10), 5, GFLAGS),
 
-- 
2.30.2


_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

[PATCH AUTOSEL 4.19 04/25] clk: mediatek: Fix asymmetrical PLL enable and disable control

[Sasha Levin]

From: Chun-Jie Chen <chun-jie.chen@mediatek.com>

[ Upstream commit 7cc4e1bbe300c5cf610ece8eca6c6751b8bc74db ]

In fact, the en_mask is a combination of divider enable mask
and pll enable bit(bit0).
Before this patch, we enabled both divider mask and bit0 in prepare(),
but only cleared the bit0 in unprepare().
In the future, we hope en_mask will only be used as divider enable mask.
The enable register(CON0) will be set in 2 steps:
first is divider mask, and then bit0 during prepare(), and vice versa.
But considering backward compatibility, at this stage we allow en_mask
to be a combination or a pure divider enable mask.
And then we will make en_mask a pure divider enable mask in another
following patch series.

Reviewed-by: Ikjoon Jang <ikjn@chromium.org>
Signed-off-by: Weiyi Lu <weiyi.lu@mediatek.com>
Signed-off-by: Chun-Jie Chen <chun-jie.chen@mediatek.com>
Link: https://lore.kernel.org/r/20210726105719.15793-7-chun-jie.chen@mediatek.com
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/clk/mediatek/clk-pll.c | 20 ++++++++++++++++----
 1 file changed, 16 insertions(+), 4 deletions(-)

diff --git a/drivers/clk/mediatek/clk-pll.c b/drivers/clk/mediatek/clk-pll.c
index 18842d660317..5ad68205d17d 100644
--- a/drivers/clk/mediatek/clk-pll.c
+++ b/drivers/clk/mediatek/clk-pll.c
@@ -247,6 +247,7 @@ static int mtk_pll_prepare(struct clk_hw *hw)
 {
 	struct mtk_clk_pll *pll = to_mtk_clk_pll(hw);
 	u32 r;
+	u32 div_en_mask;
 
 	r = readl(pll->pwr_addr) | CON0_PWR_ON;
 	writel(r, pll->pwr_addr);
@@ -256,10 +257,15 @@ static int mtk_pll_prepare(struct clk_hw *hw)
 	writel(r, pll->pwr_addr);
 	udelay(1);
 
-	r = readl(pll->base_addr + REG_CON0);
-	r |= pll->data->en_mask;
+	r = readl(pll->base_addr + REG_CON0) | CON0_BASE_EN;
 	writel(r, pll->base_addr + REG_CON0);
 
+	div_en_mask = pll->data->en_mask & ~CON0_BASE_EN;
+	if (div_en_mask) {
+		r = readl(pll->base_addr + REG_CON0) | div_en_mask;
+		writel(r, pll->base_addr + REG_CON0);
+	}
+
 	__mtk_pll_tuner_enable(pll);
 
 	udelay(20);
@@ -277,6 +283,7 @@ static void mtk_pll_unprepare(struct clk_hw *hw)
 {
 	struct mtk_clk_pll *pll = to_mtk_clk_pll(hw);
 	u32 r;
+	u32 div_en_mask;
 
 	if (pll->data->flags & HAVE_RST_BAR) {
 		r = readl(pll->base_addr + REG_CON0);
@@ -286,8 +293,13 @@ static void mtk_pll_unprepare(struct clk_hw *hw)
 
 	__mtk_pll_tuner_disable(pll);
 
-	r = readl(pll->base_addr + REG_CON0);
-	r &= ~CON0_BASE_EN;
+	div_en_mask = pll->data->en_mask & ~CON0_BASE_EN;
+	if (div_en_mask) {
+		r = readl(pll->base_addr + REG_CON0) & ~div_en_mask;
+		writel(r, pll->base_addr + REG_CON0);
+	}
+
+	r = readl(pll->base_addr + REG_CON0) & ~CON0_BASE_EN;
 	writel(r, pll->base_addr + REG_CON0);
 
 	r = readl(pll->pwr_addr) | CON0_ISO_EN;
-- 
2.30.2


_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel