+++ /dev/null
-/*
- * Copyright (c) 2015, Linaro Limited
- * Copyright (c) 2014, The Linux Foundation. All rights reserved.
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- */
-
-#include <linux/clk-provider.h>
-#include <linux/err.h>
-#include <linux/export.h>
-#include <linux/init.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/mutex.h>
-#include <linux/of.h>
-#include <linux/of_device.h>
-#include <linux/platform_device.h>
-#include <linux/soc/qcom/smd-rpm.h>
-
-#include "clk-smd-rpm.h"
-#include <dt-bindings/clock/qcom,rpmcc.h>
-
-#define to_clk_smd_rpm(_hw) container_of(_hw, struct clk_smd_rpm, hw)
-
-static DEFINE_MUTEX(rpm_smd_clk_lock);
-
-static int clk_smd_rpm_set_rate_active(struct clk_smd_rpm *r,
- unsigned long rate)
-{
- struct clk_smd_rpm_req req = {
- .key = cpu_to_le32(r->rpm_key),
- .nbytes = cpu_to_le32(sizeof(u32)),
- .value = cpu_to_le32(DIV_ROUND_UP(rate, 1000)), /* to kHz */
- };
-
- return qcom_rpm_smd_write(r->rpm, QCOM_SMD_RPM_ACTIVE_STATE,
- r->rpm_res_type, r->rpm_clk_id, &req,
- sizeof(req));
-}
-
-static int clk_smd_rpm_set_rate_sleep(struct clk_smd_rpm *r,
- unsigned long rate)
-{
- struct clk_smd_rpm_req req = {
- .key = cpu_to_le32(r->rpm_key),
- .nbytes = cpu_to_le32(sizeof(u32)),
- .value = cpu_to_le32(DIV_ROUND_UP(rate, 1000)), /* to kHz */
- };
-
- return qcom_rpm_smd_write(r->rpm, QCOM_SMD_RPM_SLEEP_STATE,
- r->rpm_res_type, r->rpm_clk_id, &req,
- sizeof(req));
-}
-
-static void to_active_sleep(struct clk_smd_rpm *r, unsigned long rate,
- unsigned long *active, unsigned long *sleep)
-{
- *active = rate;
-
- /*
- * Active-only clocks don't care what the rate is during sleep. So,
- * they vote for zero.
- */
- if (r->active_only)
- *sleep = 0;
- else
- *sleep = *active;
-}
-
-static int clk_smd_rpm_prepare(struct clk_hw *hw)
-{
- struct clk_smd_rpm *r = to_clk_smd_rpm(hw);
- struct clk_smd_rpm *peer = r->peer;
- unsigned long this_rate = 0, this_sleep_rate = 0;
- unsigned long peer_rate = 0, peer_sleep_rate = 0;
- unsigned long active_rate, sleep_rate;
- int ret = 0;
-
- mutex_lock(&rpm_smd_clk_lock);
-
- /* Don't send requests to the RPM if the rate has not been set. */
- if (!r->rate)
- goto out;
-
- to_active_sleep(r, r->rate, &this_rate, &this_sleep_rate);
-
- /* Take peer clock's rate into account only if it's enabled. */
- if (peer->enabled)
- to_active_sleep(peer, peer->rate,
- &peer_rate, &peer_sleep_rate);
-
- active_rate = max(this_rate, peer_rate);
-
- if (r->branch)
- active_rate = !!active_rate;
-
- ret = clk_smd_rpm_set_rate_active(r, active_rate);
- if (ret)
- goto out;
-
- sleep_rate = max(this_sleep_rate, peer_sleep_rate);
- if (r->branch)
- sleep_rate = !!sleep_rate;
-
- ret = clk_smd_rpm_set_rate_sleep(r, sleep_rate);
- if (ret)
- /* Undo the active set vote and restore it */
- ret = clk_smd_rpm_set_rate_active(r, peer_rate);
-
-out:
- if (!ret)
- r->enabled = true;
-
- mutex_unlock(&rpm_smd_clk_lock);
-
- return ret;
-}
-
-static void clk_smd_rpm_unprepare(struct clk_hw *hw)
-{
- struct clk_smd_rpm *r = to_clk_smd_rpm(hw);
- struct clk_smd_rpm *peer = r->peer;
- unsigned long peer_rate = 0, peer_sleep_rate = 0;
- unsigned long active_rate, sleep_rate;
- int ret;
-
- mutex_lock(&rpm_smd_clk_lock);
-
- if (!r->rate)
- goto out;
-
- /* Take peer clock's rate into account only if it's enabled. */
- if (peer->enabled)
- to_active_sleep(peer, peer->rate, &peer_rate,
- &peer_sleep_rate);
-
- active_rate = r->branch ? !!peer_rate : peer_rate;
- ret = clk_smd_rpm_set_rate_active(r, active_rate);
- if (ret)
- goto out;
-
- sleep_rate = r->branch ? !!peer_sleep_rate : peer_sleep_rate;
- ret = clk_smd_rpm_set_rate_sleep(r, sleep_rate);
- if (ret)
- goto out;
-
- r->enabled = false;
-
-out:
- mutex_unlock(&rpm_smd_clk_lock);
-}
-
-static int clk_smd_rpm_set_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long parent_rate)
-{
- struct clk_smd_rpm *r = to_clk_smd_rpm(hw);
- struct clk_smd_rpm *peer = r->peer;
- unsigned long active_rate, sleep_rate;
- unsigned long this_rate = 0, this_sleep_rate = 0;
- unsigned long peer_rate = 0, peer_sleep_rate = 0;
- int ret = 0;
-
- mutex_lock(&rpm_smd_clk_lock);
-
- if (!r->enabled)
- goto out;
-
- to_active_sleep(r, rate, &this_rate, &this_sleep_rate);
-
- /* Take peer clock's rate into account only if it's enabled. */
- if (peer->enabled)
- to_active_sleep(peer, peer->rate,
- &peer_rate, &peer_sleep_rate);
-
- active_rate = max(this_rate, peer_rate);
- ret = clk_smd_rpm_set_rate_active(r, active_rate);
- if (ret)
- goto out;
-
- sleep_rate = max(this_sleep_rate, peer_sleep_rate);
- ret = clk_smd_rpm_set_rate_sleep(r, sleep_rate);
- if (ret)
- goto out;
-
- r->rate = rate;
-
-out:
- mutex_unlock(&rpm_smd_clk_lock);
-
- return ret;
-}
-
-static long clk_smd_rpm_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *parent_rate)
-{
- /*
- * RPM handles rate rounding and we don't have a way to
- * know what the rate will be, so just return whatever
- * rate is requested.
- */
- return rate;
-}
-
-static unsigned long clk_smd_rpm_recalc_rate(struct clk_hw *hw,
- unsigned long parent_rate)
-{
- struct clk_smd_rpm *r = to_clk_smd_rpm(hw);
-
- /*
- * RPM handles rate rounding and we don't have a way to
- * know what the rate will be, so just return whatever
- * rate was set.
- */
- return r->rate;
-}
-
-static int clk_smd_rpm_enable_scaling(struct qcom_smd_rpm *rpm)
-{
- int ret;
- struct clk_smd_rpm_req req = {
- .key = cpu_to_le32(QCOM_RPM_SMD_KEY_ENABLE),
- .nbytes = cpu_to_le32(sizeof(u32)),
- .value = cpu_to_le32(1),
- };
-
- ret = qcom_rpm_smd_write(rpm, QCOM_SMD_RPM_SLEEP_STATE,
- QCOM_SMD_RPM_MISC_CLK,
- QCOM_RPM_SCALING_ENABLE_ID, &req, sizeof(req));
- if (ret) {
- pr_err("RPM clock scaling (sleep set) not enabled!\n");
- return ret;
- }
-
- ret = qcom_rpm_smd_write(rpm, QCOM_SMD_RPM_ACTIVE_STATE,
- QCOM_SMD_RPM_MISC_CLK,
- QCOM_RPM_SCALING_ENABLE_ID, &req, sizeof(req));
- if (ret) {
- pr_err("RPM clock scaling (active set) not enabled!\n");
- return ret;
- }
-
- pr_debug("%s: RPM clock scaling is enabled\n", __func__);
- return 0;
-}
-
-const struct clk_ops clk_smd_rpm_ops = {
- .prepare = clk_smd_rpm_prepare,
- .unprepare = clk_smd_rpm_unprepare,
- .set_rate = clk_smd_rpm_set_rate,
- .round_rate = clk_smd_rpm_round_rate,
- .recalc_rate = clk_smd_rpm_recalc_rate,
-};
-EXPORT_SYMBOL_GPL(clk_smd_rpm_ops);
-
-const struct clk_ops clk_smd_rpm_branch_ops = {
- .prepare = clk_smd_rpm_prepare,
- .unprepare = clk_smd_rpm_unprepare,
- .round_rate = clk_smd_rpm_round_rate,
- .recalc_rate = clk_smd_rpm_recalc_rate,
-};
-EXPORT_SYMBOL_GPL(clk_smd_rpm_branch_ops);
-
-struct rpm_cc {
- struct qcom_rpm *rpm;
- struct clk_onecell_data data;
- struct clk *clks[];
-};
-
-struct rpm_smd_clk_desc {
- struct clk_smd_rpm **clks;
- size_t num_clks;
-};
-
-/* msm8916 */
-DEFINE_CLK_SMD_RPM(msm8916, pcnoc_clk, pcnoc_a_clk, QCOM_SMD_RPM_BUS_CLK, 0);
-DEFINE_CLK_SMD_RPM(msm8916, snoc_clk, snoc_a_clk, QCOM_SMD_RPM_BUS_CLK, 1);
-DEFINE_CLK_SMD_RPM(msm8916, bimc_clk, bimc_a_clk, QCOM_SMD_RPM_MEM_CLK, 0);
-DEFINE_CLK_SMD_RPM_BRANCH(msm8916, xo, xo_a, QCOM_SMD_RPM_MISC_CLK, 0, 19200000);
-DEFINE_CLK_SMD_RPM_QDSS(msm8916, qdss_clk, qdss_a_clk, QCOM_SMD_RPM_MISC_CLK, 1);
-DEFINE_CLK_SMD_RPM_XO_BUFFER(msm8916, bb_clk1, bb_clk1_a, 1);
-DEFINE_CLK_SMD_RPM_XO_BUFFER(msm8916, bb_clk2, bb_clk2_a, 2);
-DEFINE_CLK_SMD_RPM_XO_BUFFER(msm8916, rf_clk1, rf_clk1_a, 4);
-DEFINE_CLK_SMD_RPM_XO_BUFFER(msm8916, rf_clk2, rf_clk2_a, 5);
-DEFINE_CLK_SMD_RPM_XO_BUFFER_PINCTRL(msm8916, bb_clk1_pin, bb_clk1_a_pin, 1);
-DEFINE_CLK_SMD_RPM_XO_BUFFER_PINCTRL(msm8916, bb_clk2_pin, bb_clk2_a_pin, 2);
-DEFINE_CLK_SMD_RPM_XO_BUFFER_PINCTRL(msm8916, rf_clk1_pin, rf_clk1_a_pin, 4);
-DEFINE_CLK_SMD_RPM_XO_BUFFER_PINCTRL(msm8916, rf_clk2_pin, rf_clk2_a_pin, 5);
-
-static struct clk_smd_rpm *msm8916_clks[] = {
- [RPM_XO_CLK_SRC] = &msm8916_xo,
- [RPM_XO_A_CLK_SRC] = &msm8916_xo_a,
- [RPM_PCNOC_CLK] = &msm8916_pcnoc_clk,
- [RPM_PCNOC_A_CLK] = &msm8916_pcnoc_a_clk,
- [RPM_SNOC_CLK] = &msm8916_snoc_clk,
- [RPM_SNOC_A_CLK] = &msm8916_snoc_a_clk,
- [RPM_BIMC_CLK] = &msm8916_bimc_clk,
- [RPM_BIMC_A_CLK] = &msm8916_bimc_a_clk,
- [RPM_QDSS_CLK] = &msm8916_qdss_clk,
- [RPM_QDSS_A_CLK] = &msm8916_qdss_a_clk,
- [RPM_BB_CLK1] = &msm8916_bb_clk1,
- [RPM_BB_CLK1_A] = &msm8916_bb_clk1_a,
- [RPM_BB_CLK2] = &msm8916_bb_clk2,
- [RPM_BB_CLK2_A] = &msm8916_bb_clk2_a,
- [RPM_RF_CLK1] = &msm8916_rf_clk1,
- [RPM_RF_CLK1_A] = &msm8916_rf_clk1_a,
- [RPM_RF_CLK2] = &msm8916_rf_clk2,
- [RPM_RF_CLK2_A] = &msm8916_rf_clk2_a,
- [RPM_BB_CLK1_PIN] = &msm8916_bb_clk1_pin,
- [RPM_BB_CLK1_A_PIN] = &msm8916_bb_clk1_a_pin,
- [RPM_BB_CLK2_PIN] = &msm8916_bb_clk2_pin,
- [RPM_BB_CLK2_A_PIN] = &msm8916_bb_clk2_a_pin,
- [RPM_RF_CLK1_PIN] = &msm8916_rf_clk1_pin,
- [RPM_RF_CLK1_A_PIN] = &msm8916_rf_clk1_a_pin,
- [RPM_RF_CLK2_PIN] = &msm8916_rf_clk2_pin,
- [RPM_RF_CLK2_A_PIN] = &msm8916_rf_clk2_a_pin,
-};
-
-static const struct rpm_smd_clk_desc rpm_clk_msm8916 = {
- .clks = msm8916_clks,
- .num_clks = ARRAY_SIZE(msm8916_clks),
-};
-
-static const struct of_device_id rpm_smd_clk_match_table[] = {
- { .compatible = "qcom,rpmcc-msm8916", .data = &rpm_clk_msm8916},
- { }
-};
-MODULE_DEVICE_TABLE(of, rpm_smd_clk_match_table);
-
-static int rpm_smd_clk_probe(struct platform_device *pdev)
-{
- struct clk **clks;
- struct clk *clk;
- struct rpm_cc *rcc;
- struct clk_onecell_data *data;
- int ret, i;
- size_t num_clks;
- struct qcom_smd_rpm *rpm;
- struct clk_smd_rpm **rpm_smd_clks;
- const struct rpm_smd_clk_desc *desc;
-
- rpm = dev_get_drvdata(pdev->dev.parent);
- if (!rpm) {
- dev_err(&pdev->dev, "Unable to retrieve handle to RPM\n");
- return -ENODEV;
- }
-
- desc = of_device_get_match_data(&pdev->dev);
- if (!desc)
- return -EINVAL;
-
- rpm_smd_clks = desc->clks;
- num_clks = desc->num_clks;
-
- rcc = devm_kzalloc(&pdev->dev, sizeof(*rcc) + sizeof(*clks) * num_clks,
- GFP_KERNEL);
- if (!rcc)
- return -ENOMEM;
-
- clks = rcc->clks;
- data = &rcc->data;
- data->clks = clks;
- data->clk_num = num_clks;
-
- for (i = 0; i < num_clks; i++) {
- if (!rpm_smd_clks[i]) {
- clks[i] = ERR_PTR(-ENOENT);
- continue;
- }
-
- rpm_smd_clks[i]->rpm = rpm;
- clk = devm_clk_register(&pdev->dev, &rpm_smd_clks[i]->hw);
- if (IS_ERR(clk)) {
- ret = PTR_ERR(clk);
- goto err;
- }
-
- clks[i] = clk;
- }
-
- ret = of_clk_add_provider(pdev->dev.of_node, of_clk_src_onecell_get,
- data);
- if (ret)
- goto err;
-
- ret = clk_smd_rpm_enable_scaling(rpm);
- if (ret) {
- of_clk_del_provider(pdev->dev.of_node);
- goto err;
- }
-
- return 0;
-err:
- dev_err(&pdev->dev, "Error registering SMD clock driver (%d)\n", ret);
- return ret;
-}
-
-static int rpm_smd_clk_remove(struct platform_device *pdev)
-{
- of_clk_del_provider(pdev->dev.of_node);
- return 0;
-}
-
-static struct platform_driver rpm_smd_clk_driver = {
- .driver = {
- .name = "qcom-clk-smd-rpm",
- .of_match_table = rpm_smd_clk_match_table,
- },
- .probe = rpm_smd_clk_probe,
- .remove = rpm_smd_clk_remove,
-};
-
-static int __init rpm_smd_clk_init(void)
-{
- return platform_driver_register(&rpm_smd_clk_driver);
-}
-core_initcall(rpm_smd_clk_init);
-
-static void __exit rpm_smd_clk_exit(void)
-{
- platform_driver_unregister(&rpm_smd_clk_driver);
-}
-module_exit(rpm_smd_clk_exit);
-
-MODULE_DESCRIPTION("Qualcomm RPM over SMD Clock Controller Driver");
-MODULE_LICENSE("GPL v2");
-MODULE_ALIAS("platform:qcom-clk-smd-rpm");
+++ /dev/null
-/*
- * Copyright (c) 2015, Linaro Limited
- * Copyright (c) 2014, The Linux Foundation. All rights reserved.
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- */
-
-#ifndef __QCOM_CLK_SMD_RPM_H__
-#define __QCOM_CLK_SMD_RPM_H__
-
-#include <linux/clk-provider.h>
-
-#define QCOM_RPM_KEY_SOFTWARE_ENABLE 0x6e657773
-#define QCOM_RPM_KEY_PIN_CTRL_CLK_BUFFER_ENABLE_KEY 0x62636370
-#define QCOM_RPM_SMD_KEY_RATE 0x007a484b
-#define QCOM_RPM_SMD_KEY_ENABLE 0x62616e45
-#define QCOM_RPM_SMD_KEY_STATE 0x54415453
-#define QCOM_RPM_SCALING_ENABLE_ID 0x2
-
-struct qcom_smd_rpm;
-
-struct clk_smd_rpm {
- const int rpm_res_type;
- const int rpm_key;
- const int rpm_clk_id;
- const int rpm_status_id;
- const bool active_only;
- bool enabled;
- bool branch;
- struct clk_smd_rpm *peer;
- struct clk_hw hw;
- unsigned long rate;
- struct qcom_smd_rpm *rpm;
-};
-
-struct clk_smd_rpm_req {
- __le32 key;
- __le32 nbytes;
- __le32 value;
-};
-
-extern const struct clk_ops clk_smd_rpm_ops;
-extern const struct clk_ops clk_smd_rpm_branch_ops;
-
-#define __DEFINE_CLK_SMD_RPM(_platform, _name, _active, type, r_id, stat_id, \
- key) \
- static struct clk_smd_rpm _platform##_##_active; \
- static struct clk_smd_rpm _platform##_##_name = { \
- .rpm_res_type = (type), \
- .rpm_clk_id = (r_id), \
- .rpm_status_id = (stat_id), \
- .rpm_key = (key), \
- .peer = &_platform##_##_active, \
- .rate = INT_MAX, \
- .hw.init = &(struct clk_init_data){ \
- .ops = &clk_smd_rpm_ops, \
- .name = #_name, \
- .parent_names = (const char *[]){ "xo_board" }, \
- .num_parents = 1, \
- }, \
- }; \
- static struct clk_smd_rpm _platform##_##_active = { \
- .rpm_res_type = (type), \
- .rpm_clk_id = (r_id), \
- .rpm_status_id = (stat_id), \
- .rpm_key = (key), \
- .peer = &_platform##_##_name, \
- .active_only = true, \
- .rate = INT_MAX, \
- .hw.init = &(struct clk_init_data){ \
- .ops = &clk_smd_rpm_ops, \
- .name = #_active, \
- .parent_names = (const char *[]){ "xo_board" }, \
- .num_parents = 1, \
- }, \
- }
-
-#define __DEFINE_CLK_SMD_RPM_BRANCH(_platform, _name, _active, type, r_id, \
- stat_id, r, key) \
- static struct clk_smd_rpm _platform##_##_active; \
- static struct clk_smd_rpm _platform##_##_name = { \
- .rpm_res_type = (type), \
- .rpm_clk_id = (r_id), \
- .rpm_status_id = (stat_id), \
- .rpm_key = (key), \
- .peer = &_platform##_##_active, \
- .branch = true, \
- .rate = (r), \
- .hw.init = &(struct clk_init_data){ \
- .ops = &clk_smd_rpm_branch_ops, \
- .name = #_name, \
- .parent_names = (const char *[]){ "xo_board" }, \
- .num_parents = 1, \
- }, \
- }; \
- static struct clk_smd_rpm _platform##_##_active = { \
- .rpm_res_type = (type), \
- .rpm_clk_id = (r_id), \
- .rpm_status_id = (stat_id), \
- .rpm_key = (key), \
- .peer = &_platform##_##_name, \
- .active_only = true, \
- .branch = true, \
- .rate = (r), \
- .hw.init = &(struct clk_init_data){ \
- .ops = &clk_smd_rpm_branch_ops, \
- .name = #_active, \
- .parent_names = (const char *[]){ "xo_board" }, \
- .num_parents = 1, \
- }, \
- }
-
-#define DEFINE_CLK_SMD_RPM(_platform, _name, _active, type, r_id) \
- __DEFINE_CLK_SMD_RPM(_platform, _name, _active, type, r_id, \
- 0, QCOM_RPM_SMD_KEY_RATE)
-
-#define DEFINE_CLK_SMD_RPM_BRANCH(_platform, _name, _active, type, r_id, r) \
- __DEFINE_CLK_SMD_RPM_BRANCH(_platform, _name, _active, type, \
- r_id, 0, r, QCOM_RPM_SMD_KEY_ENABLE)
-
-#define DEFINE_CLK_SMD_RPM_QDSS(_platform, _name, _active, type, r_id) \
- __DEFINE_CLK_SMD_RPM(_platform, _name, _active, type, r_id, \
- 0, QCOM_RPM_SMD_KEY_STATE)
-
-#define DEFINE_CLK_SMD_RPM_XO_BUFFER(_platform, _name, _active, r_id) \
- __DEFINE_CLK_SMD_RPM_BRANCH(_platform, _name, _active, \
- QCOM_SMD_RPM_CLK_BUF_A, r_id, 0, 1000, \
- QCOM_RPM_KEY_SOFTWARE_ENABLE)
-
-#define DEFINE_CLK_SMD_RPM_XO_BUFFER_PINCTRL(_platform, _name, _active, r_id) \
- __DEFINE_CLK_SMD_RPM_BRANCH(_platform, _name, _active, \
- QCOM_SMD_RPM_CLK_BUF_A, r_id, 0, 1000, \
- QCOM_RPM_KEY_PIN_CTRL_CLK_BUFFER_ENABLE_KEY)
-
-#endif
projects / karo-tx-linux.git / commitdiff