platform: Enable SD card boot feature

SDCC2 clock configuration and init power for SD
required for enabling of boot from SD feature.

Change-Id: Idfe6ee21cbefff150f330b31d22afe254d658e2f
diff --git a/platform/msm8996/msm8996-clock.c b/platform/msm8996/msm8996-clock.c
index 9074bd6..4fe4ddd 100644
--- a/platform/msm8996/msm8996-clock.c
+++ b/platform/msm8996/msm8996-clock.c
@@ -286,6 +286,19 @@
 	F_END
 };
 
+static struct clk_freq_tbl ftbl_gcc_sdcc2_4_apps_clk[] =
+{
+	F(   144000,    cxo,  16,   3,  25),
+	F(   400000,    cxo,  12,   1,   4),
+	F( 20000000,  gpll0,  15,   1,   2),
+	F( 25000000,  gpll0,  12,   1,   2),
+	F( 50000000,  gpll0,  12,   0,   0),
+	F(100000000,  gpll0,   6,   0,   0),
+	F(200000000,  gpll0,   3,   0,   0),
+	F_END
+};
+
+
 static struct rcg_clk sdcc1_apps_clk_src =
 {
 	.cmd_reg      = (uint32_t *) SDCC1_CMD_RCGR,
@@ -326,6 +339,47 @@
 	},
 };
 
+static struct rcg_clk sdcc2_apps_clk_src =
+{
+	.cmd_reg      = (uint32_t *) SDCC2_CMD_RCGR,
+	.cfg_reg      = (uint32_t *) SDCC2_CFG_RCGR,
+	.m_reg        = (uint32_t *) SDCC2_M,
+	.n_reg        = (uint32_t *) SDCC2_N,
+	.d_reg        = (uint32_t *) SDCC2_D,
+
+	.set_rate     = clock_lib2_rcg_set_rate_mnd,
+	.freq_tbl     = ftbl_gcc_sdcc2_4_apps_clk,
+	.current_freq = &rcg_dummy_freq,
+
+	.c = {
+		.dbg_name = "sdc2_clk",
+		.ops      = &clk_ops_rcg_mnd,
+	},
+};
+
+static struct branch_clk gcc_sdcc2_apps_clk =
+{
+	.cbcr_reg     = (uint32_t *) SDCC2_APPS_CBCR,
+	.parent       = &sdcc2_apps_clk_src.c,
+
+	.c = {
+		.dbg_name = "gcc_sdcc2_apps_clk",
+		.ops      = &clk_ops_branch,
+	},
+};
+
+static struct branch_clk gcc_sdcc2_ahb_clk =
+{
+	.cbcr_reg     = (uint32_t *) SDCC2_AHB_CBCR,
+	.has_sibling  = 1,
+
+	.c = {
+		.dbg_name = "gcc_sdcc2_ahb_clk",
+		.ops      = &clk_ops_branch,
+	},
+};
+
+
 static struct branch_clk gcc_sys_noc_usb30_axi_clk = {
 	.cbcr_reg    = (uint32_t *) SYS_NOC_USB3_AXI_CBCR,
 	.has_sibling = 1,
@@ -892,6 +946,9 @@
 	CLK_LOOKUP("sdc1_iface_clk", gcc_sdcc1_ahb_clk.c),
 	CLK_LOOKUP("sdc1_core_clk",  gcc_sdcc1_apps_clk.c),
 
+	CLK_LOOKUP("sdc2_iface_clk", gcc_sdcc2_ahb_clk.c),
+	CLK_LOOKUP("sdc2_core_clk",  gcc_sdcc2_apps_clk.c),
+
 	CLK_LOOKUP("uart8_iface_clk", gcc_blsp2_ahb_clk.c),
 	CLK_LOOKUP("uart8_core_clk",  gcc_blsp2_uart2_apps_clk.c),