linux-kernel - [PATCH v3 4/7] clk: rockchip: rk3399: add ddrc clock support

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Date:	Fri, 22 Jul 2016 17:07:17 +0800
From:	Lin Huang <hl@...k-chips.com>
To:	heiko@...ech.de
Cc:	mark.yao@...k-chips.com, myungjoo.ham@...sung.com,
	cw00.choi@...sung.com, airlied@...ux.ie, mturquette@...libre.com,
	dbasehore@...omium.org, sboyd@...eaurora.org,
	linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org,
	dianders@...omium.org, linux-rockchip@...ts.infradead.org,
	kyungmin.park@...sung.com, linux-arm-kernel@...ts.infradead.org,
	tixy@...aro.org, xsf@...k-chips.com, typ@...k-chips.com,
	Lin Huang <hl@...k-chips.com>
Subject: [PATCH v3 4/7] clk: rockchip: rk3399: add ddrc clock support

add ddrc clock setting, so we can do ddr frequency
scaling on rk3399 platform in future.

Signed-off-by: Lin Huang <hl@...k-chips.com>
---
Changes in v3:
- None

Changes in v2:
- remove clk_ddrc_dpll_src from critical clock list

Changes in v1:
- remove ddrc source CLK_IGNORE_UNUSED flag
- move clk_ddrc and clk_ddrc_dpll_src to critical

 drivers/clk/rockchip/clk-rk3399.c | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/drivers/clk/rockchip/clk-rk3399.c b/drivers/clk/rockchip/clk-rk3399.c
index c109d80..7ef9d82 100644
--- a/drivers/clk/rockchip/clk-rk3399.c
+++ b/drivers/clk/rockchip/clk-rk3399.c
@@ -118,6 +118,10 @@ PNAME(mux_armclkb_p)				= { "clk_core_b_lpll_src",
 						    "clk_core_b_bpll_src",
 						    "clk_core_b_dpll_src",
 						    "clk_core_b_gpll_src" };
+PNAME(mux_ddrclk_p)				= { "clk_ddrc_lpll_src",
+						    "clk_ddrc_bpll_src",
+						    "clk_ddrc_dpll_src",
+						    "clk_ddrc_gpll_src" };
 PNAME(mux_aclk_cci_p)				= { "cpll_aclk_cci_src",
 						    "gpll_aclk_cci_src",
 						    "npll_aclk_cci_src",
@@ -1377,6 +1381,18 @@ static struct rockchip_clk_branch rk3399_clk_branches[] __initdata = {
 	COMPOSITE_NOMUX(0, "clk_test", "clk_test_pre", CLK_IGNORE_UNUSED,
 			RK3368_CLKSEL_CON(58), 0, 5, DFLAGS,
 			RK3368_CLKGATE_CON(13), 11, GFLAGS),
+
+	/* ddrc */
+	GATE(0, "clk_ddrc_lpll_src", "lpll", 0, RK3399_CLKGATE_CON(3),
+	     0, GFLAGS),
+	GATE(0, "clk_ddrc_bpll_src", "bpll", 0, RK3399_CLKGATE_CON(3),
+	     1, GFLAGS),
+	GATE(0, "clk_ddrc_dpll_src", "dpll", 0, RK3399_CLKGATE_CON(3),
+	     2, GFLAGS),
+	GATE(0, "clk_ddrc_gpll_src", "gpll", 0, RK3399_CLKGATE_CON(3),
+	     3, GFLAGS),
+	COMPOSITE_DDRC(SCLK_DDRCLK, "clk_ddrc", mux_ddrclk_p, 0,
+		       RK3399_CLKSEL_CON(6), 4, 2, MFLAGS, 0, 3, DFLAGS),
 };
 
 static struct rockchip_clk_branch rk3399_clk_pmu_branches[] __initdata = {
@@ -1487,6 +1503,9 @@ static const char *const rk3399_cru_critical_clocks[] __initconst = {
 	"gpll_hclk_perilp1_src",
 	"gpll_aclk_perilp0_src",
 	"gpll_aclk_perihp_src",
+
+	/* ddrc */
+	"clk_ddrc"
 };
 
 static const char *const rk3399_pmucru_critical_clocks[] __initconst = {
-- 
2.6.6