+From patchwork Wed Nov 2 15:56:56 2016
+Content-Type: text/plain; charset="utf-8"
+MIME-Version: 1.0
+Content-Transfer-Encoding: 7bit
+Subject: [v9,1/3] clk: qcom: Add support for SMD-RPM Clocks
+From: Georgi Djakov <georgi.djakov@linaro.org>
+X-Patchwork-Id: 9409419
+Message-Id: <20161102155658.32203-2-georgi.djakov@linaro.org>
+To: sboyd@codeaurora.org, mturquette@baylibre.com
+Cc: linux-clk@vger.kernel.org, devicetree@vger.kernel.org,
+ robh+dt@kernel.org, mark.rutland@arm.com,
+ linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org,
+ georgi.djakov@linaro.org
+Date: Wed, 2 Nov 2016 17:56:56 +0200
+
+This adds initial support for clocks controlled by the Resource
+Power Manager (RPM) processor on some Qualcomm SoCs, which use
+the qcom_smd_rpm driver to communicate with RPM.
+Such platforms are msm8916, apq8084 and msm8974.
+
+The RPM is a dedicated hardware engine for managing the shared
+SoC resources in order to keep the lowest power profile. It
+communicates with other hardware subsystems via shared memory
+and accepts clock requests, aggregates the requests and turns
+the clocks on/off or scales them on demand.
+
+This driver is based on the codeaurora.org driver:
+https://www.codeaurora.org/cgit/quic/la/kernel/msm-3.10/tree/drivers/clk/qcom/clock-rpm.c
+
+Signed-off-by: Georgi Djakov <georgi.djakov@linaro.org>
+---
+ .../devicetree/bindings/clock/qcom,rpmcc.txt | 36 ++
+ drivers/clk/qcom/Kconfig | 16 +
+ drivers/clk/qcom/Makefile | 1 +
+ drivers/clk/qcom/clk-smd-rpm.c | 571 +++++++++++++++++++++
+ include/dt-bindings/clock/qcom,rpmcc.h | 45 ++
+ 5 files changed, 669 insertions(+)
+ create mode 100644 Documentation/devicetree/bindings/clock/qcom,rpmcc.txt
+ create mode 100644 drivers/clk/qcom/clk-smd-rpm.c
+ create mode 100644 include/dt-bindings/clock/qcom,rpmcc.h
+
+--
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+
+--- /dev/null
++++ b/Documentation/devicetree/bindings/clock/qcom,rpmcc.txt
+@@ -0,0 +1,36 @@
++Qualcomm RPM Clock Controller Binding
++------------------------------------------------
++The RPM is a dedicated hardware engine for managing the shared
++SoC resources in order to keep the lowest power profile. It
++communicates with other hardware subsystems via shared memory
++and accepts clock requests, aggregates the requests and turns
++the clocks on/off or scales them on demand.
++
++Required properties :
++- compatible : shall contain only one of the following. The generic
++ compatible "qcom,rpmcc" should be also included.
++
++ "qcom,rpmcc-msm8916", "qcom,rpmcc"
++
++- #clock-cells : shall contain 1
++
++Example:
++ smd {
++ compatible = "qcom,smd";
++
++ rpm {
++ interrupts = <0 168 1>;
++ qcom,ipc = <&apcs 8 0>;
++ qcom,smd-edge = <15>;
++
++ rpm_requests {
++ compatible = "qcom,rpm-msm8916";
++ qcom,smd-channels = "rpm_requests";
++
++ rpmcc: clock-controller {
++ compatible = "qcom,rpmcc-msm8916", "qcom,rpmcc";
++ #clock-cells = <1>;
++ };
++ };
++ };
++ };
+--- a/drivers/clk/qcom/Kconfig
++++ b/drivers/clk/qcom/Kconfig
+@@ -2,6 +2,9 @@ config QCOM_GDSC
+ bool
+ select PM_GENERIC_DOMAINS if PM
+
++config QCOM_RPMCC
++ bool
++
+ config COMMON_CLK_QCOM
+ tristate "Support for Qualcomm's clock controllers"
+ depends on OF
+@@ -9,6 +12,19 @@ config COMMON_CLK_QCOM
+ select REGMAP_MMIO
+ select RESET_CONTROLLER
+
++config QCOM_CLK_SMD_RPM
++ tristate "RPM over SMD based Clock Controller"
++ depends on COMMON_CLK_QCOM && QCOM_SMD_RPM
++ select QCOM_RPMCC
++ help
++ The RPM (Resource Power Manager) is a dedicated hardware engine for
++ managing the shared SoC resources in order to keep the lowest power
++ profile. It communicates with other hardware subsystems via shared
++ memory and accepts clock requests, aggregates the requests and turns
++ the clocks on/off or scales them on demand.
++ Say Y if you want to support the clocks exposed by the RPM on
++ platforms such as apq8016, apq8084, msm8974 etc.
++
+ config APQ_GCC_8084
+ tristate "APQ8084 Global Clock Controller"
+ select QCOM_GDSC
+--- a/drivers/clk/qcom/Makefile
++++ b/drivers/clk/qcom/Makefile
+@@ -22,3 +22,4 @@ obj-$(CONFIG_MSM_LCC_8960) += lcc-msm896
+ obj-$(CONFIG_MSM_GCC_8974) += gcc-msm8974.o
+ obj-$(CONFIG_MSM_MMCC_8960) += mmcc-msm8960.o
+ obj-$(CONFIG_MSM_MMCC_8974) += mmcc-msm8974.o
++obj-$(CONFIG_QCOM_CLK_SMD_RPM) += clk-smd-rpm.o
+--- /dev/null
++++ b/drivers/clk/qcom/clk-smd-rpm.c
+@@ -0,0 +1,571 @@
++/*
++ * Copyright (c) 2016, 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 <dt-bindings/clock/qcom,rpmcc.h>
++#include <dt-bindings/mfd/qcom-rpm.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
++
++#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), \
++ .active_only = true, \
++ .rpm_key = (key), \
++ .peer = &_platform##_##_name, \
++ .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), \
++ .branch = true, \
++ .peer = &_platform##_##_active, \
++ .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), \
++ .active_only = true, \
++ .rpm_key = (key), \
++ .branch = true, \
++ .peer = &_platform##_##_name, \
++ .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)
++
++#define to_clk_smd_rpm(_hw) container_of(_hw, struct clk_smd_rpm, hw)
++
++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;
++};
++
++struct rpm_cc {
++ struct qcom_rpm *rpm;
++ struct clk_hw_onecell_data data;
++ struct clk_hw *hws[];
++};
++
++struct rpm_smd_clk_desc {
++ struct clk_smd_rpm **clks;
++ size_t num_clks;
++};
++
++static DEFINE_MUTEX(rpm_smd_clk_lock);
++
++static int clk_smd_rpm_handoff(struct clk_smd_rpm *r)
++{
++ int ret;
++ struct clk_smd_rpm_req req = {
++ .key = cpu_to_le32(r->rpm_key),
++ .nbytes = cpu_to_le32(sizeof(u32)),
++ .value = cpu_to_le32(INT_MAX),
++ };
++
++ ret = qcom_rpm_smd_write(r->rpm, QCOM_SMD_RPM_ACTIVE_STATE,
++ r->rpm_res_type, r->rpm_clk_id, &req,
++ sizeof(req));
++ if (ret)
++ return ret;
++ ret = qcom_rpm_smd_write(r->rpm, QCOM_SMD_RPM_SLEEP_STATE,
++ r->rpm_res_type, r->rpm_clk_id, &req,
++ sizeof(req));
++ if (ret)
++ return ret;
++
++ return 0;
++}
++
++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;
++}
++
++static 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,
++};
++
++static 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,
++};
++
++/* 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_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_SMD_PCNOC_CLK] = &msm8916_pcnoc_clk,
++ [RPM_SMD_PCNOC_A_CLK] = &msm8916_pcnoc_a_clk,
++ [RPM_SMD_SNOC_CLK] = &msm8916_snoc_clk,
++ [RPM_SMD_SNOC_A_CLK] = &msm8916_snoc_a_clk,
++ [RPM_SMD_BIMC_CLK] = &msm8916_bimc_clk,
++ [RPM_SMD_BIMC_A_CLK] = &msm8916_bimc_a_clk,
++ [RPM_SMD_QDSS_CLK] = &msm8916_qdss_clk,
++ [RPM_SMD_QDSS_A_CLK] = &msm8916_qdss_a_clk,
++ [RPM_SMD_BB_CLK1] = &msm8916_bb_clk1,
++ [RPM_SMD_BB_CLK1_A] = &msm8916_bb_clk1_a,
++ [RPM_SMD_BB_CLK2] = &msm8916_bb_clk2,
++ [RPM_SMD_BB_CLK2_A] = &msm8916_bb_clk2_a,
++ [RPM_SMD_RF_CLK1] = &msm8916_rf_clk1,
++ [RPM_SMD_RF_CLK1_A] = &msm8916_rf_clk1_a,
++ [RPM_SMD_RF_CLK2] = &msm8916_rf_clk2,
++ [RPM_SMD_RF_CLK2_A] = &msm8916_rf_clk2_a,
++ [RPM_SMD_BB_CLK1_PIN] = &msm8916_bb_clk1_pin,
++ [RPM_SMD_BB_CLK1_A_PIN] = &msm8916_bb_clk1_a_pin,
++ [RPM_SMD_BB_CLK2_PIN] = &msm8916_bb_clk2_pin,
++ [RPM_SMD_BB_CLK2_A_PIN] = &msm8916_bb_clk2_a_pin,
++ [RPM_SMD_RF_CLK1_PIN] = &msm8916_rf_clk1_pin,
++ [RPM_SMD_RF_CLK1_A_PIN] = &msm8916_rf_clk1_a_pin,
++ [RPM_SMD_RF_CLK2_PIN] = &msm8916_rf_clk2_pin,
++ [RPM_SMD_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_hw **hws;
++ struct rpm_cc *rcc;
++ struct clk_hw_onecell_data *data;
++ int ret;
++ size_t num_clks, i;
++ 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(*hws) * num_clks,
++ GFP_KERNEL);
++ if (!rcc)
++ return -ENOMEM;
++
++ hws = rcc->hws;
++ data = &rcc->data;
++ data->num = num_clks;
++
++ for (i = 0; i < num_clks; i++) {
++ if (!rpm_smd_clks[i]) {
++ continue;
++ }
++
++ rpm_smd_clks[i]->rpm = rpm;
++
++ ret = clk_smd_rpm_handoff(rpm_smd_clks[i]);
++ if (ret)
++ goto err;
++ }
++
++ ret = clk_smd_rpm_enable_scaling(rpm);
++ if (ret)
++ goto err;
++
++ for (i = 0; i < num_clks; i++) {
++ if (!rpm_smd_clks[i]) {
++ data->hws[i] = ERR_PTR(-ENOENT);
++ continue;
++ }
++
++ ret = devm_clk_hw_register(&pdev->dev, &rpm_smd_clks[i]->hw);
++ if (ret)
++ goto err;
++ }
++
++ ret = of_clk_add_hw_provider(pdev->dev.of_node, of_clk_hw_onecell_get,
++ data);
++ if (ret)
++ 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
++++ b/include/dt-bindings/clock/qcom,rpmcc.h
+@@ -0,0 +1,45 @@
++/*
++ * Copyright 2015 Linaro Limited
++ *
++ * 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 _DT_BINDINGS_CLK_MSM_RPMCC_H
++#define _DT_BINDINGS_CLK_MSM_RPMCC_H
++
++/* msm8916 */
++#define RPM_SMD_XO_CLK_SRC 0
++#define RPM_SMD_XO_A_CLK_SRC 1
++#define RPM_SMD_PCNOC_CLK 2
++#define RPM_SMD_PCNOC_A_CLK 3
++#define RPM_SMD_SNOC_CLK 4
++#define RPM_SMD_SNOC_A_CLK 5
++#define RPM_SMD_BIMC_CLK 6
++#define RPM_SMD_BIMC_A_CLK 7
++#define RPM_SMD_QDSS_CLK 8
++#define RPM_SMD_QDSS_A_CLK 9
++#define RPM_SMD_BB_CLK1 10
++#define RPM_SMD_BB_CLK1_A 11
++#define RPM_SMD_BB_CLK2 12
++#define RPM_SMD_BB_CLK2_A 13
++#define RPM_SMD_RF_CLK1 14
++#define RPM_SMD_RF_CLK1_A 15
++#define RPM_SMD_RF_CLK2 16
++#define RPM_SMD_RF_CLK2_A 17
++#define RPM_SMD_BB_CLK1_PIN 18
++#define RPM_SMD_BB_CLK1_A_PIN 19
++#define RPM_SMD_BB_CLK2_PIN 20
++#define RPM_SMD_BB_CLK2_A_PIN 21
++#define RPM_SMD_RF_CLK1_PIN 22
++#define RPM_SMD_RF_CLK1_A_PIN 23
++#define RPM_SMD_RF_CLK2_PIN 24
++#define RPM_SMD_RF_CLK2_A_PIN 25
++
++#endif
projects / openwrt / openwrt.git / commitdiff