Linux-libre 4.2-gnu

1 files changed, 178 insertions, 0 deletions

diff --git a/drivers/clk/bcm/clk-iproc.h b/drivers/clk/bcm/clk-iproc.h
new file mode 100644
index 000000000..d834b7abd
--- /dev/null
+++ b/drivers/clk/bcm/clk-iproc.h
@@ -0,0 +1,178 @@
+/*
+ * Copyright (C) 2014 Broadcom Corporation
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation version 2.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef _CLK_IPROC_H
+#define _CLK_IPROC_H
+
+#include <linux/kernel.h>
+#include <linux/list.h>
+#include <linux/spinlock.h>
+#include <linux/slab.h>
+#include <linux/device.h>
+#include <linux/of.h>
+#include <linux/clk-provider.h>
+
+#define IPROC_CLK_NAME_LEN 25
+#define IPROC_CLK_INVALID_OFFSET 0xffffffff
+#define bit_mask(width) ((1 << (width)) - 1)
+
+/* clocks that should not be disabled at runtime */
+#define IPROC_CLK_AON BIT(0)
+
+/* PLL that requires gating through ASIU */
+#define IPROC_CLK_PLL_ASIU BIT(1)
+
+/* PLL that has fractional part of the NDIV */
+#define IPROC_CLK_PLL_HAS_NDIV_FRAC BIT(2)
+
+/*
+ * Some of the iProc PLL/clocks may have an ASIC bug that requires read back
+ * of the same register following the write to flush the write transaction into
+ * the intended register
+ */
+#define IPROC_CLK_NEEDS_READ_BACK BIT(3)
+
+/*
+ * Some PLLs require the PLL SW override bit to be set before changes can be
+ * applied to the PLL
+ */
+#define IPROC_CLK_PLL_NEEDS_SW_CFG BIT(4)
+
+/*
+ * Parameters for VCO frequency configuration
+ *
+ * VCO frequency =
+ * ((ndiv_int + ndiv_frac / 2^20) * (ref freqeuncy  / pdiv)
+ */
+struct iproc_pll_vco_param {
+	unsigned long rate;
+	unsigned int ndiv_int;
+	unsigned int ndiv_frac;
+	unsigned int pdiv;
+};
+
+struct iproc_clk_reg_op {
+	unsigned int offset;
+	unsigned int shift;
+	unsigned int width;
+};
+
+/*
+ * Clock gating control at the top ASIU level
+ */
+struct iproc_asiu_gate {
+	unsigned int offset;
+	unsigned int en_shift;
+};
+
+/*
+ * Control of powering on/off of a PLL
+ *
+ * Before powering off a PLL, input isolation (ISO) needs to be enabled
+ */
+struct iproc_pll_aon_pwr_ctrl {
+	unsigned int offset;
+	unsigned int pwr_width;
+	unsigned int pwr_shift;
+	unsigned int iso_shift;
+};
+
+/*
+ * Control of the PLL reset, with Ki, Kp, and Ka parameters
+ */
+struct iproc_pll_reset_ctrl {
+	unsigned int offset;
+	unsigned int reset_shift;
+	unsigned int p_reset_shift;
+	unsigned int ki_shift;
+	unsigned int ki_width;
+	unsigned int kp_shift;
+	unsigned int kp_width;
+	unsigned int ka_shift;
+	unsigned int ka_width;
+};
+
+/*
+ * To enable SW control of the PLL
+ */
+struct iproc_pll_sw_ctrl {
+	unsigned int offset;
+	unsigned int shift;
+};
+
+struct iproc_pll_vco_ctrl {
+	unsigned int u_offset;
+	unsigned int l_offset;
+};
+
+/*
+ * Main PLL control parameters
+ */
+struct iproc_pll_ctrl {
+	unsigned long flags;
+	struct iproc_pll_aon_pwr_ctrl aon;
+	struct iproc_asiu_gate asiu;
+	struct iproc_pll_reset_ctrl reset;
+	struct iproc_pll_sw_ctrl sw_ctrl;
+	struct iproc_clk_reg_op ndiv_int;
+	struct iproc_clk_reg_op ndiv_frac;
+	struct iproc_clk_reg_op pdiv;
+	struct iproc_pll_vco_ctrl vco_ctrl;
+	struct iproc_clk_reg_op status;
+};
+
+/*
+ * Controls enabling/disabling a PLL derived clock
+ */
+struct iproc_clk_enable_ctrl {
+	unsigned int offset;
+	unsigned int enable_shift;
+	unsigned int hold_shift;
+	unsigned int bypass_shift;
+};
+
+/*
+ * Main clock control parameters for clocks derived from the PLLs
+ */
+struct iproc_clk_ctrl {
+	unsigned int channel;
+	unsigned long flags;
+	struct iproc_clk_enable_ctrl enable;
+	struct iproc_clk_reg_op mdiv;
+};
+
+/*
+ * Divisor of the ASIU clocks
+ */
+struct iproc_asiu_div {
+	unsigned int offset;
+	unsigned int en_shift;
+	unsigned int high_shift;
+	unsigned int high_width;
+	unsigned int low_shift;
+	unsigned int low_width;
+};
+
+void __init iproc_armpll_setup(struct device_node *node);
+void __init iproc_pll_clk_setup(struct device_node *node,
+				const struct iproc_pll_ctrl *pll_ctrl,
+				const struct iproc_pll_vco_param *vco,
+				unsigned int num_vco_entries,
+				const struct iproc_clk_ctrl *clk_ctrl,
+				unsigned int num_clks);
+void __init iproc_asiu_setup(struct device_node *node,
+			     const struct iproc_asiu_div *div,
+			     const struct iproc_asiu_gate *gate,
+			     unsigned int num_clks);
+
+#endif /* _CLK_IPROC_H */