[PATCH v2 10/14] clk: samsung: exynos8855: add block usb clock support

[Raghav Sharma <raghav.s@samsung.com>]

Register compatible and cmu_info data to support clocks.
CMU_USB, this provides clocks for USB

Co-developed-by: Alim Akhtar <alim.akhtar@samsung.com>
Signed-off-by: Alim Akhtar <alim.akhtar@samsung.com>
Signed-off-by: Raghav Sharma <raghav.s@samsung.com>
---
 drivers/clk/samsung/clk-exynos8855.c | 78 ++++++++++++++++++++++++++++
 1 file changed, 78 insertions(+)

diff --git a/drivers/clk/samsung/clk-exynos8855.c b/drivers/clk/samsung/clk-exynos8855.c
index 16d71db11ad0..010ca79116d3 100644
--- a/drivers/clk/samsung/clk-exynos8855.c
+++ b/drivers/clk/samsung/clk-exynos8855.c
@@ -20,11 +20,13 @@
 #define CLKS_NR_PERIC                   (CLK_GOUT_USI_PERIC + 1)
 #define CLKS_NR_PERIS                   (CLK_GOUT_WDT1_PERIS + 1)
 #define CLKS_NR_HSI                     (CLK_GOUT_SYSREG_HSI  + 1)
+#define CLKS_NR_USB                     (CLK_GOUT_SYSREG_USB + 1)
 
 #define EXYNOS8855_HSI_GATE_DBG_OFFSET      0x2000
 #define EXYNOS8855_PERIS_GATE_DBG_OFFSET      0x2004
 #define EXYNOS8855_PERIC_GATE_DBG_OFFSET      0x2024
 #define EXYNOS8855_TOP_GATE_DBG_OFFSET      0x20A0
+#define EXYNOS8855_USB_GATE_DBG_OFFSET      0x2004
 
 #define EXYNOS8855_DRCG_EN_OFFSET       0x104
 #define EXYNOS8855_MEMCLK_OFFSET        0x108
@@ -1261,6 +1263,79 @@ static const struct samsung_cmu_info hsi_cmu_info __initconst = {
 	.memclk_offset          = EXYNOS8855_MEMCLK_OFFSET,
 };
 
+/* ---- CMU_USB --------------------------------------------------------- */
+
+/* Register Offset definitions for CMU_USB (0x13000000) */
+#define CMU_USB_PLL_CON0_MUX_CLKCMU_USB_NOC_USER                   0x600
+#define CMU_USB_PLL_CON0_MUX_CLKCMU_USB_USB20DRD_USER              0x610
+#define CMU_USB_CLK_CON_MUX_CLK_USB_USB20DRD                       0x1000
+#define CMU_USB_CLK_CON_DIV_CLK_USB_NOC_DIV3                       0x1800
+#define CMU_USB_CLK_CON_GAT_BLK_USB_UID_CMU_USB_IPCLKPORT_PCLK     0x2000
+#define CMU_USB_CLK_CON_GAT_BLK_USB_UID_SYSREG_USB_IPCLKPORT_PCLK  0x2030
+#define CMU_USB_CONTROLLER_OPTION0_CMU_CTRL                        0x800
+
+static const unsigned long usb_clk_regs[] __initconst = {
+	CMU_USB_PLL_CON0_MUX_CLKCMU_USB_NOC_USER,
+	CMU_USB_PLL_CON0_MUX_CLKCMU_USB_USB20DRD_USER,
+	CMU_USB_CLK_CON_MUX_CLK_USB_USB20DRD,
+	CMU_USB_CLK_CON_DIV_CLK_USB_NOC_DIV3,
+	CMU_USB_CLK_CON_GAT_BLK_USB_UID_CMU_USB_IPCLKPORT_PCLK,
+	CMU_USB_CLK_CON_GAT_BLK_USB_UID_SYSREG_USB_IPCLKPORT_PCLK,
+	CMU_USB_CONTROLLER_OPTION0_CMU_CTRL,
+};
+
+/* List of parent clocks for Muxes in CMU_USB */
+PNAME(mout_clkcmu_usb_noc_user_p) = { "oscclk", "dout_clkcmu_usb_noc" };
+PNAME(mout_clkcmu_usb_usb20drd_user_p) = { "oscclk", "dout_clkcmu_usb_usb20drd" };
+PNAME(mout_clk_usb_usb20drd_p) = { "oscclk_usb_link", "mout_clkcmu_usb_usb20drd_user" };
+
+static const struct samsung_mux_clock usb_mux_clks[] __initconst = {
+	MUX(CLK_MOUT_USB_NOC_USER, "mout_clkcmu_usb_noc_user",
+	    mout_clkcmu_usb_noc_user_p, CMU_USB_PLL_CON0_MUX_CLKCMU_USB_NOC_USER, 4, 1),
+	MUX(CLK_MOUT_USB_USB20DRD_USER, "mout_clkcmu_usb_usb20drd_user",
+	    mout_clkcmu_usb_usb20drd_user_p, CMU_USB_PLL_CON0_MUX_CLKCMU_USB_USB20DRD_USER, 4, 1),
+	MUX(CLK_MOUT_USB_USB20DRD, "mout_clk_usb_usb20drd",
+	    mout_clk_usb_usb20drd_p, CMU_USB_CLK_CON_MUX_CLK_USB_USB20DRD, 0, 1),
+};
+
+static const struct samsung_div_clock usb_div_clks[] __initconst = {
+	DIV(CLK_DOUT_USB_NOC_DIV3, "dout_clkcmu_usb_noc_div3",
+	    "mout_clkcmu_usb_noc_user", CMU_USB_CLK_CON_DIV_CLK_USB_NOC_DIV3,
+	    0, 4),
+};
+
+static const struct samsung_gate_clock usb_gate_clks[] __initconst = {
+	/* System will hang if this critical clock is gated */
+	GATE(CLK_GOUT_CMU_USB, "gout_cmu_usb",
+	     "mout_clkcmu_usb_noc_user",
+	     CMU_USB_CLK_CON_GAT_BLK_USB_UID_CMU_USB_IPCLKPORT_PCLK,
+	     21, 0, 0),
+	GATE(CLK_GOUT_SYSREG_USB, "gout_sysreg_usb",
+	     "mout_clkcmu_usb_noc_user",
+	     CMU_USB_CLK_CON_GAT_BLK_USB_UID_SYSREG_USB_IPCLKPORT_PCLK,
+	     21, 0, 0),
+};
+
+static const struct samsung_cmu_info usb_cmu_info __initconst = {
+	.mux_clks               = usb_mux_clks,
+	.nr_mux_clks            = ARRAY_SIZE(usb_mux_clks),
+	.div_clks               = usb_div_clks,
+	.nr_div_clks            = ARRAY_SIZE(usb_div_clks),
+	.gate_clks              = usb_gate_clks,
+	.nr_gate_clks           = ARRAY_SIZE(usb_gate_clks),
+	.nr_clk_ids             = CLKS_NR_USB,
+	.clk_regs               = usb_clk_regs,
+	.nr_clk_regs            = ARRAY_SIZE(usb_clk_regs),
+	.sysreg_clk_regs	= dcrg_memclk_sysreg,
+	.nr_sysreg_clk_regs	= ARRAY_SIZE(dcrg_memclk_sysreg),
+	.clk_name               = "bus",
+	.auto_clock_gate        = true,
+	.gate_dbg_offset        = EXYNOS8855_USB_GATE_DBG_OFFSET,
+	.option_offset          = CMU_USB_CONTROLLER_OPTION0_CMU_CTRL,
+	.drcg_offset            = EXYNOS8855_DRCG_EN_OFFSET,
+	.memclk_offset          = EXYNOS8855_MEMCLK_OFFSET,
+};
+
 static int __init exynos8855_cmu_probe(struct platform_device *pdev)
 {
 	const struct samsung_cmu_info *info;
@@ -1285,6 +1360,9 @@ static const struct of_device_id exynos8855_cmu_of_match[] = {
 	}, {
 		.compatible = "samsung,exynos8855-cmu-top",
 		.data = &top_cmu_info,
+	}, {
+		.compatible = "samsung,exynos8855-cmu-usb",
+		.data = &usb_cmu_info,
 	},
 	{ }
 };
-- 
2.34.1