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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * OMAP2/3 interface clock control4 *5 * Copyright (C) 2011 Nokia Corporation6 * Paul Walmsley7 */8#undef DEBUG9 10#include <linux/kernel.h>11#include <linux/clk-provider.h>12#include <linux/io.h>13#include <linux/clk/ti.h>14 15#include "clock.h"16 17/* Register offsets */18#define OMAP24XX_CM_FCLKEN2 0x0419#define CM_AUTOIDLE 0x3020#define CM_ICLKEN 0x1021#define CM_IDLEST 0x2022 23#define OMAP24XX_CM_IDLEST_VAL 024 25/* Private functions */26 27/* XXX */28void omap2_clkt_iclk_allow_idle(struct clk_hw_omap *clk)29{30 u32 v;31 struct clk_omap_reg r;32 33 memcpy(&r, &clk->enable_reg, sizeof(r));34 r.offset ^= (CM_AUTOIDLE ^ CM_ICLKEN);35 36 v = ti_clk_ll_ops->clk_readl(&r);37 v |= (1 << clk->enable_bit);38 ti_clk_ll_ops->clk_writel(v, &r);39}40 41/* XXX */42void omap2_clkt_iclk_deny_idle(struct clk_hw_omap *clk)43{44 u32 v;45 struct clk_omap_reg r;46 47 memcpy(&r, &clk->enable_reg, sizeof(r));48 49 r.offset ^= (CM_AUTOIDLE ^ CM_ICLKEN);50 51 v = ti_clk_ll_ops->clk_readl(&r);52 v &= ~(1 << clk->enable_bit);53 ti_clk_ll_ops->clk_writel(v, &r);54}55 56/**57 * omap2430_clk_i2chs_find_idlest - return CM_IDLEST info for 2430 I2CHS58 * @clk: struct clk * being enabled59 * @idlest_reg: void __iomem ** to store CM_IDLEST reg address into60 * @idlest_bit: pointer to a u8 to store the CM_IDLEST bit shift into61 * @idlest_val: pointer to a u8 to store the CM_IDLEST indicator62 *63 * OMAP2430 I2CHS CM_IDLEST bits are in CM_IDLEST1_CORE, but the64 * CM_*CLKEN bits are in CM_{I,F}CLKEN2_CORE. This custom function65 * passes back the correct CM_IDLEST register address for I2CHS66 * modules. No return value.67 */68static void omap2430_clk_i2chs_find_idlest(struct clk_hw_omap *clk,69 struct clk_omap_reg *idlest_reg,70 u8 *idlest_bit,71 u8 *idlest_val)72{73 memcpy(idlest_reg, &clk->enable_reg, sizeof(*idlest_reg));74 idlest_reg->offset ^= (OMAP24XX_CM_FCLKEN2 ^ CM_IDLEST);75 *idlest_bit = clk->enable_bit;76 *idlest_val = OMAP24XX_CM_IDLEST_VAL;77}78 79/* Public data */80 81const struct clk_hw_omap_ops clkhwops_iclk = {82 .allow_idle = omap2_clkt_iclk_allow_idle,83 .deny_idle = omap2_clkt_iclk_deny_idle,84};85 86const struct clk_hw_omap_ops clkhwops_iclk_wait = {87 .allow_idle = omap2_clkt_iclk_allow_idle,88 .deny_idle = omap2_clkt_iclk_deny_idle,89 .find_idlest = omap2_clk_dflt_find_idlest,90 .find_companion = omap2_clk_dflt_find_companion,91};92 93/* 2430 I2CHS has non-standard IDLEST register */94const struct clk_hw_omap_ops clkhwops_omap2430_i2chs_wait = {95 .find_idlest = omap2430_clk_i2chs_find_idlest,96 .find_companion = omap2_clk_dflt_find_companion,97};98