[PATCH v6 3/8] clk: rockchip: rk3399: add ddrc clock support

Lin Huang
2016-08-16T22:36:42Z

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

Signed-off-by: Lin Huang <hl@rock-chips.com>
---
Changes in v6:
- None

Changes in v5:
- fit for the ddr type

Changes in v4:
- None

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 e445cd6..01d4945 100644
--- a/drivers/clk/rockchip/clk-rk3399.c
+++ b/drivers/clk/rockchip/clk-rk3399.c
@@ -120,6 +120,10 @@ 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",
@@ -1379,6 +1383,18 @@ 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_DDRCLK(SCLK_DDRC, "clk_ddrc", mux_ddrclk_p, 0,
+ RK3399_CLKSEL_CON(6), 4, 2, 0, 0, ROCKCHIP_DDRCLK_SIP),
};

static struct rockchip_clk_branch rk3399_clk_pmu_branches[] __initdata = {
@@ -1493,6 +1509,9 @@ static const char *const rk3399_cru_critical_clocks[] __initconst = {
"gpll_aclk_perilp0_src",
"gpll_aclk_perihp_src",
"aclk_vio_noc",
+
+ /* ddrc */
+ "clk_ddrc"
};

static const char *const rk3399_pmucru_critical_clocks[] __initconst = {
--
2.6.6