1 files changed, 97 insertions, 0 deletions
diff --git a/drivers/clk/ti/clkt_iclk.c b/drivers/clk/ti/clkt_iclk.c
new file mode 100644
index 0000000000..b738ee6154
--- /dev/null
+++ b/drivers/clk/ti/clkt_iclk.c
@@ -0,0 +1,97 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * OMAP2/3 interface clock control
+ *
+ * Copyright (C) 2011 Nokia Corporation
+ * Paul Walmsley
+ */
+#undef DEBUG
+
+#include <linux/kernel.h>
+#include <linux/clk-provider.h>
+#include <linux/io.h>
+#include <linux/clk/ti.h>
+
+#include "clock.h"
+
+/* Register offsets */
+#define OMAP24XX_CM_FCLKEN2		0x04
+#define CM_AUTOIDLE			0x30
+#define CM_ICLKEN			0x10
+#define CM_IDLEST			0x20
+
+#define OMAP24XX_CM_IDLEST_VAL		0
+
+/* Private functions */
+
+/* XXX */
+void omap2_clkt_iclk_allow_idle(struct clk_hw_omap *clk)
+{
+	u32 v;
+	struct clk_omap_reg r;
+
+	memcpy(&r, &clk->enable_reg, sizeof(r));
+	r.offset ^= (CM_AUTOIDLE ^ CM_ICLKEN);
+
+	v = ti_clk_ll_ops->clk_readl(&r);
+	v |= (1 << clk->enable_bit);
+	ti_clk_ll_ops->clk_writel(v, &r);
+}
+
+/* XXX */
+void omap2_clkt_iclk_deny_idle(struct clk_hw_omap *clk)
+{
+	u32 v;
+	struct clk_omap_reg r;
+
+	memcpy(&r, &clk->enable_reg, sizeof(r));
+
+	r.offset ^= (CM_AUTOIDLE ^ CM_ICLKEN);
+
+	v = ti_clk_ll_ops->clk_readl(&r);
+	v &= ~(1 << clk->enable_bit);
+	ti_clk_ll_ops->clk_writel(v, &r);
+}
+
+/**
+ * omap2430_clk_i2chs_find_idlest - return CM_IDLEST info for 2430 I2CHS
+ * @clk: struct clk * being enabled
+ * @idlest_reg: void __iomem ** to store CM_IDLEST reg address into
+ * @idlest_bit: pointer to a u8 to store the CM_IDLEST bit shift into
+ * @idlest_val: pointer to a u8 to store the CM_IDLEST indicator
+ *
+ * OMAP2430 I2CHS CM_IDLEST bits are in CM_IDLEST1_CORE, but the
+ * CM_*CLKEN bits are in CM_{I,F}CLKEN2_CORE.  This custom function
+ * passes back the correct CM_IDLEST register address for I2CHS
+ * modules.  No return value.
+ */
+static void omap2430_clk_i2chs_find_idlest(struct clk_hw_omap *clk,
+					   struct clk_omap_reg *idlest_reg,
+					   u8 *idlest_bit,
+					   u8 *idlest_val)
+{
+	memcpy(idlest_reg, &clk->enable_reg, sizeof(*idlest_reg));
+	idlest_reg->offset ^= (OMAP24XX_CM_FCLKEN2 ^ CM_IDLEST);
+	*idlest_bit = clk->enable_bit;
+	*idlest_val = OMAP24XX_CM_IDLEST_VAL;
+}
+
+/* Public data */
+
+const struct clk_hw_omap_ops clkhwops_iclk = {
+	.allow_idle	= omap2_clkt_iclk_allow_idle,
+	.deny_idle	= omap2_clkt_iclk_deny_idle,
+};
+
+const struct clk_hw_omap_ops clkhwops_iclk_wait = {
+	.allow_idle	= omap2_clkt_iclk_allow_idle,
+	.deny_idle	= omap2_clkt_iclk_deny_idle,
+	.find_idlest	= omap2_clk_dflt_find_idlest,
+	.find_companion	= omap2_clk_dflt_find_companion,
+};
+
+/* 2430 I2CHS has non-standard IDLEST register */
+const struct clk_hw_omap_ops clkhwops_omap2430_i2chs_wait = {
+	.find_idlest	= omap2430_clk_i2chs_find_idlest,
+	.find_companion	= omap2_clk_dflt_find_companion,
+};