Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 615 insertions, 0 deletions

diff --git a/drivers/clk/qcom/clk-rpm.c b/drivers/clk/qcom/clk-rpm.c
new file mode 100644
index 0000000000..745026ef4d
--- /dev/null
+++ b/drivers/clk/qcom/clk-rpm.c
@@ -0,0 +1,615 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2016, Linaro Limited
+ * Copyright (c) 2014, The Linux Foundation. All rights reserved.
+ */
+
+#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/mfd/qcom_rpm.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+
+#include <dt-bindings/mfd/qcom-rpm.h>
+#include <dt-bindings/clock/qcom,rpmcc.h>
+
+#define QCOM_RPM_MISC_CLK_TYPE				0x306b6c63
+#define QCOM_RPM_SCALING_ENABLE_ID			0x2
+#define QCOM_RPM_XO_MODE_ON				0x2
+
+static const struct clk_parent_data gcc_pxo[] = {
+	{ .fw_name = "pxo", .name = "pxo_board" },
+};
+
+static const struct clk_parent_data gcc_cxo[] = {
+	{ .fw_name = "cxo", .name = "cxo_board" },
+};
+
+#define DEFINE_CLK_RPM(_name, r_id)					      \
+	static struct clk_rpm clk_rpm_##_name##_a_clk;			      \
+	static struct clk_rpm clk_rpm_##_name##_clk = {			      \
+		.rpm_clk_id = (r_id),					      \
+		.peer = &clk_rpm_##_name##_a_clk,			      \
+		.rate = INT_MAX,					      \
+		.hw.init = &(struct clk_init_data){			      \
+			.ops = &clk_rpm_ops,				      \
+			.name = #_name "_clk",				      \
+			.parent_data = gcc_pxo,				      \
+			.num_parents = ARRAY_SIZE(gcc_pxo),		      \
+		},							      \
+	};								      \
+	static struct clk_rpm clk_rpm_##_name##_a_clk = {		      \
+		.rpm_clk_id = (r_id),					      \
+		.peer = &clk_rpm_##_name##_clk,				      \
+		.active_only = true,					      \
+		.rate = INT_MAX,					      \
+		.hw.init = &(struct clk_init_data){			      \
+			.ops = &clk_rpm_ops,				      \
+			.name = #_name "_a_clk",			      \
+			.parent_data = gcc_pxo,				      \
+			.num_parents = ARRAY_SIZE(gcc_pxo),		      \
+		},							      \
+	}
+
+#define DEFINE_CLK_RPM_XO_BUFFER(_name, offset)				      \
+	static struct clk_rpm clk_rpm_##_name##_clk = {			      \
+		.rpm_clk_id = QCOM_RPM_CXO_BUFFERS,			      \
+		.xo_offset = (offset),					      \
+		.hw.init = &(struct clk_init_data){			      \
+			.ops = &clk_rpm_xo_ops,				      \
+			.name = #_name "_clk",				      \
+			.parent_data = gcc_cxo,				      \
+			.num_parents = ARRAY_SIZE(gcc_cxo),		      \
+		},							      \
+	}
+
+#define DEFINE_CLK_RPM_FIXED(_name, r_id, r)				      \
+	static struct clk_rpm clk_rpm_##_name##_clk = {			      \
+		.rpm_clk_id = (r_id),					      \
+		.rate = (r),						      \
+		.hw.init = &(struct clk_init_data){			      \
+			.ops = &clk_rpm_fixed_ops,			      \
+			.name = #_name "_clk",				      \
+			.parent_data = gcc_pxo,				      \
+			.num_parents = ARRAY_SIZE(gcc_pxo),		      \
+		},							      \
+	}
+
+#define to_clk_rpm(_hw) container_of(_hw, struct clk_rpm, hw)
+
+struct rpm_cc;
+
+struct clk_rpm {
+	const int rpm_clk_id;
+	const int xo_offset;
+	const bool active_only;
+	unsigned long rate;
+	bool enabled;
+	bool branch;
+	struct clk_rpm *peer;
+	struct clk_hw hw;
+	struct qcom_rpm *rpm;
+	struct rpm_cc *rpm_cc;
+};
+
+struct rpm_cc {
+	struct qcom_rpm *rpm;
+	struct clk_rpm **clks;
+	size_t num_clks;
+	u32 xo_buffer_value;
+	struct mutex xo_lock;
+};
+
+struct rpm_clk_desc {
+	struct clk_rpm **clks;
+	size_t num_clks;
+};
+
+static DEFINE_MUTEX(rpm_clk_lock);
+
+static int clk_rpm_handoff(struct clk_rpm *r)
+{
+	int ret;
+	u32 value = INT_MAX;
+
+	/*
+	 * The vendor tree simply reads the status for this
+	 * RPM clock.
+	 */
+	if (r->rpm_clk_id == QCOM_RPM_PLL_4 ||
+		r->rpm_clk_id == QCOM_RPM_CXO_BUFFERS)
+		return 0;
+
+	ret = qcom_rpm_write(r->rpm, QCOM_RPM_ACTIVE_STATE,
+			     r->rpm_clk_id, &value, 1);
+	if (ret)
+		return ret;
+	ret = qcom_rpm_write(r->rpm, QCOM_RPM_SLEEP_STATE,
+			     r->rpm_clk_id, &value, 1);
+	if (ret)
+		return ret;
+
+	return 0;
+}
+
+static int clk_rpm_set_rate_active(struct clk_rpm *r, unsigned long rate)
+{
+	u32 value = DIV_ROUND_UP(rate, 1000); /* to kHz */
+
+	return qcom_rpm_write(r->rpm, QCOM_RPM_ACTIVE_STATE,
+			      r->rpm_clk_id, &value, 1);
+}
+
+static int clk_rpm_set_rate_sleep(struct clk_rpm *r, unsigned long rate)
+{
+	u32 value = DIV_ROUND_UP(rate, 1000); /* to kHz */
+
+	return qcom_rpm_write(r->rpm, QCOM_RPM_SLEEP_STATE,
+			      r->rpm_clk_id, &value, 1);
+}
+
+static void to_active_sleep(struct clk_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_rpm_prepare(struct clk_hw *hw)
+{
+	struct clk_rpm *r = to_clk_rpm(hw);
+	struct clk_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_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_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_rpm_set_rate_sleep(r, sleep_rate);
+	if (ret)
+		/* Undo the active set vote and restore it */
+		ret = clk_rpm_set_rate_active(r, peer_rate);
+
+out:
+	if (!ret)
+		r->enabled = true;
+
+	mutex_unlock(&rpm_clk_lock);
+
+	return ret;
+}
+
+static void clk_rpm_unprepare(struct clk_hw *hw)
+{
+	struct clk_rpm *r = to_clk_rpm(hw);
+	struct clk_rpm *peer = r->peer;
+	unsigned long peer_rate = 0, peer_sleep_rate = 0;
+	unsigned long active_rate, sleep_rate;
+	int ret;
+
+	mutex_lock(&rpm_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_rpm_set_rate_active(r, active_rate);
+	if (ret)
+		goto out;
+
+	sleep_rate = r->branch ? !!peer_sleep_rate : peer_sleep_rate;
+	ret = clk_rpm_set_rate_sleep(r, sleep_rate);
+	if (ret)
+		goto out;
+
+	r->enabled = false;
+
+out:
+	mutex_unlock(&rpm_clk_lock);
+}
+
+static int clk_rpm_xo_prepare(struct clk_hw *hw)
+{
+	struct clk_rpm *r = to_clk_rpm(hw);
+	struct rpm_cc *rcc = r->rpm_cc;
+	int ret, clk_id = r->rpm_clk_id;
+	u32 value;
+
+	mutex_lock(&rcc->xo_lock);
+
+	value = rcc->xo_buffer_value | (QCOM_RPM_XO_MODE_ON << r->xo_offset);
+	ret = qcom_rpm_write(r->rpm, QCOM_RPM_ACTIVE_STATE, clk_id, &value, 1);
+	if (!ret) {
+		r->enabled = true;
+		rcc->xo_buffer_value = value;
+	}
+
+	mutex_unlock(&rcc->xo_lock);
+
+	return ret;
+}
+
+static void clk_rpm_xo_unprepare(struct clk_hw *hw)
+{
+	struct clk_rpm *r = to_clk_rpm(hw);
+	struct rpm_cc *rcc = r->rpm_cc;
+	int ret, clk_id = r->rpm_clk_id;
+	u32 value;
+
+	mutex_lock(&rcc->xo_lock);
+
+	value = rcc->xo_buffer_value & ~(QCOM_RPM_XO_MODE_ON << r->xo_offset);
+	ret = qcom_rpm_write(r->rpm, QCOM_RPM_ACTIVE_STATE, clk_id, &value, 1);
+	if (!ret) {
+		r->enabled = false;
+		rcc->xo_buffer_value = value;
+	}
+
+	mutex_unlock(&rcc->xo_lock);
+}
+
+static int clk_rpm_fixed_prepare(struct clk_hw *hw)
+{
+	struct clk_rpm *r = to_clk_rpm(hw);
+	u32 value = 1;
+	int ret;
+
+	ret = qcom_rpm_write(r->rpm, QCOM_RPM_ACTIVE_STATE,
+			     r->rpm_clk_id, &value, 1);
+	if (!ret)
+		r->enabled = true;
+
+	return ret;
+}
+
+static void clk_rpm_fixed_unprepare(struct clk_hw *hw)
+{
+	struct clk_rpm *r = to_clk_rpm(hw);
+	u32 value = 0;
+	int ret;
+
+	ret = qcom_rpm_write(r->rpm, QCOM_RPM_ACTIVE_STATE,
+			     r->rpm_clk_id, &value, 1);
+	if (!ret)
+		r->enabled = false;
+}
+
+static int clk_rpm_set_rate(struct clk_hw *hw,
+			    unsigned long rate, unsigned long parent_rate)
+{
+	struct clk_rpm *r = to_clk_rpm(hw);
+	struct clk_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_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_rpm_set_rate_active(r, active_rate);
+	if (ret)
+		goto out;
+
+	sleep_rate = max(this_sleep_rate, peer_sleep_rate);
+	ret = clk_rpm_set_rate_sleep(r, sleep_rate);
+	if (ret)
+		goto out;
+
+	r->rate = rate;
+
+out:
+	mutex_unlock(&rpm_clk_lock);
+
+	return ret;
+}
+
+static long clk_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_rpm_recalc_rate(struct clk_hw *hw,
+					 unsigned long parent_rate)
+{
+	struct clk_rpm *r = to_clk_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 const struct clk_ops clk_rpm_xo_ops = {
+	.prepare	= clk_rpm_xo_prepare,
+	.unprepare	= clk_rpm_xo_unprepare,
+};
+
+static const struct clk_ops clk_rpm_fixed_ops = {
+	.prepare	= clk_rpm_fixed_prepare,
+	.unprepare	= clk_rpm_fixed_unprepare,
+	.round_rate	= clk_rpm_round_rate,
+	.recalc_rate	= clk_rpm_recalc_rate,
+};
+
+static const struct clk_ops clk_rpm_ops = {
+	.prepare	= clk_rpm_prepare,
+	.unprepare	= clk_rpm_unprepare,
+	.set_rate	= clk_rpm_set_rate,
+	.round_rate	= clk_rpm_round_rate,
+	.recalc_rate	= clk_rpm_recalc_rate,
+};
+
+DEFINE_CLK_RPM(afab, QCOM_RPM_APPS_FABRIC_CLK);
+DEFINE_CLK_RPM(sfab, QCOM_RPM_SYS_FABRIC_CLK);
+DEFINE_CLK_RPM(mmfab, QCOM_RPM_MM_FABRIC_CLK);
+DEFINE_CLK_RPM(daytona, QCOM_RPM_DAYTONA_FABRIC_CLK);
+DEFINE_CLK_RPM(sfpb, QCOM_RPM_SFPB_CLK);
+DEFINE_CLK_RPM(cfpb, QCOM_RPM_CFPB_CLK);
+DEFINE_CLK_RPM(mmfpb, QCOM_RPM_MMFPB_CLK);
+DEFINE_CLK_RPM(smi, QCOM_RPM_SMI_CLK);
+DEFINE_CLK_RPM(ebi1, QCOM_RPM_EBI1_CLK);
+
+DEFINE_CLK_RPM(qdss, QCOM_RPM_QDSS_CLK);
+DEFINE_CLK_RPM(nss_fabric_0, QCOM_RPM_NSS_FABRIC_0_CLK);
+DEFINE_CLK_RPM(nss_fabric_1, QCOM_RPM_NSS_FABRIC_1_CLK);
+
+DEFINE_CLK_RPM_FIXED(pll4, QCOM_RPM_PLL_4, 540672000);
+
+DEFINE_CLK_RPM_XO_BUFFER(xo_d0, 0);
+DEFINE_CLK_RPM_XO_BUFFER(xo_d1, 8);
+DEFINE_CLK_RPM_XO_BUFFER(xo_a0, 16);
+DEFINE_CLK_RPM_XO_BUFFER(xo_a1, 24);
+DEFINE_CLK_RPM_XO_BUFFER(xo_a2, 28);
+
+static struct clk_rpm *msm8660_clks[] = {
+	[RPM_APPS_FABRIC_CLK] = &clk_rpm_afab_clk,
+	[RPM_APPS_FABRIC_A_CLK] = &clk_rpm_afab_a_clk,
+	[RPM_SYS_FABRIC_CLK] = &clk_rpm_sfab_clk,
+	[RPM_SYS_FABRIC_A_CLK] = &clk_rpm_sfab_a_clk,
+	[RPM_MM_FABRIC_CLK] = &clk_rpm_mmfab_clk,
+	[RPM_MM_FABRIC_A_CLK] = &clk_rpm_mmfab_a_clk,
+	[RPM_DAYTONA_FABRIC_CLK] = &clk_rpm_daytona_clk,
+	[RPM_DAYTONA_FABRIC_A_CLK] = &clk_rpm_daytona_a_clk,
+	[RPM_SFPB_CLK] = &clk_rpm_sfpb_clk,
+	[RPM_SFPB_A_CLK] = &clk_rpm_sfpb_a_clk,
+	[RPM_CFPB_CLK] = &clk_rpm_cfpb_clk,
+	[RPM_CFPB_A_CLK] = &clk_rpm_cfpb_a_clk,
+	[RPM_MMFPB_CLK] = &clk_rpm_mmfpb_clk,
+	[RPM_MMFPB_A_CLK] = &clk_rpm_mmfpb_a_clk,
+	[RPM_SMI_CLK] = &clk_rpm_smi_clk,
+	[RPM_SMI_A_CLK] = &clk_rpm_smi_a_clk,
+	[RPM_EBI1_CLK] = &clk_rpm_ebi1_clk,
+	[RPM_EBI1_A_CLK] = &clk_rpm_ebi1_a_clk,
+	[RPM_PLL4_CLK] = &clk_rpm_pll4_clk,
+};
+
+static const struct rpm_clk_desc rpm_clk_msm8660 = {
+	.clks = msm8660_clks,
+	.num_clks = ARRAY_SIZE(msm8660_clks),
+};
+
+static struct clk_rpm *apq8064_clks[] = {
+	[RPM_APPS_FABRIC_CLK] = &clk_rpm_afab_clk,
+	[RPM_APPS_FABRIC_A_CLK] = &clk_rpm_afab_a_clk,
+	[RPM_CFPB_CLK] = &clk_rpm_cfpb_clk,
+	[RPM_CFPB_A_CLK] = &clk_rpm_cfpb_a_clk,
+	[RPM_DAYTONA_FABRIC_CLK] = &clk_rpm_daytona_clk,
+	[RPM_DAYTONA_FABRIC_A_CLK] = &clk_rpm_daytona_a_clk,
+	[RPM_EBI1_CLK] = &clk_rpm_ebi1_clk,
+	[RPM_EBI1_A_CLK] = &clk_rpm_ebi1_a_clk,
+	[RPM_MM_FABRIC_CLK] = &clk_rpm_mmfab_clk,
+	[RPM_MM_FABRIC_A_CLK] = &clk_rpm_mmfab_a_clk,
+	[RPM_MMFPB_CLK] = &clk_rpm_mmfpb_clk,
+	[RPM_MMFPB_A_CLK] = &clk_rpm_mmfpb_a_clk,
+	[RPM_SYS_FABRIC_CLK] = &clk_rpm_sfab_clk,
+	[RPM_SYS_FABRIC_A_CLK] = &clk_rpm_sfab_a_clk,
+	[RPM_SFPB_CLK] = &clk_rpm_sfpb_clk,
+	[RPM_SFPB_A_CLK] = &clk_rpm_sfpb_a_clk,
+	[RPM_QDSS_CLK] = &clk_rpm_qdss_clk,
+	[RPM_QDSS_A_CLK] = &clk_rpm_qdss_a_clk,
+	[RPM_XO_D0] = &clk_rpm_xo_d0_clk,
+	[RPM_XO_D1] = &clk_rpm_xo_d1_clk,
+	[RPM_XO_A0] = &clk_rpm_xo_a0_clk,
+	[RPM_XO_A1] = &clk_rpm_xo_a1_clk,
+	[RPM_XO_A2] = &clk_rpm_xo_a2_clk,
+};
+
+static const struct rpm_clk_desc rpm_clk_apq8064 = {
+	.clks = apq8064_clks,
+	.num_clks = ARRAY_SIZE(apq8064_clks),
+};
+
+static struct clk_rpm *ipq806x_clks[] = {
+	[RPM_APPS_FABRIC_CLK] = &clk_rpm_afab_clk,
+	[RPM_APPS_FABRIC_A_CLK] = &clk_rpm_afab_a_clk,
+	[RPM_CFPB_CLK] = &clk_rpm_cfpb_clk,
+	[RPM_CFPB_A_CLK] = &clk_rpm_cfpb_a_clk,
+	[RPM_DAYTONA_FABRIC_CLK] = &clk_rpm_daytona_clk,
+	[RPM_DAYTONA_FABRIC_A_CLK] = &clk_rpm_daytona_a_clk,
+	[RPM_EBI1_CLK] = &clk_rpm_ebi1_clk,
+	[RPM_EBI1_A_CLK] = &clk_rpm_ebi1_a_clk,
+	[RPM_SYS_FABRIC_CLK] = &clk_rpm_sfab_clk,
+	[RPM_SYS_FABRIC_A_CLK] = &clk_rpm_sfab_a_clk,
+	[RPM_SFPB_CLK] = &clk_rpm_sfpb_clk,
+	[RPM_SFPB_A_CLK] = &clk_rpm_sfpb_a_clk,
+	[RPM_NSS_FABRIC_0_CLK] = &clk_rpm_nss_fabric_0_clk,
+	[RPM_NSS_FABRIC_0_A_CLK] = &clk_rpm_nss_fabric_0_a_clk,
+	[RPM_NSS_FABRIC_1_CLK] = &clk_rpm_nss_fabric_1_clk,
+	[RPM_NSS_FABRIC_1_A_CLK] = &clk_rpm_nss_fabric_1_a_clk,
+};
+
+static const struct rpm_clk_desc rpm_clk_ipq806x = {
+	.clks = ipq806x_clks,
+	.num_clks = ARRAY_SIZE(ipq806x_clks),
+};
+
+static const struct of_device_id rpm_clk_match_table[] = {
+	{ .compatible = "qcom,rpmcc-msm8660", .data = &rpm_clk_msm8660 },
+	{ .compatible = "qcom,rpmcc-apq8060", .data = &rpm_clk_msm8660 },
+	{ .compatible = "qcom,rpmcc-apq8064", .data = &rpm_clk_apq8064 },
+	{ .compatible = "qcom,rpmcc-ipq806x", .data = &rpm_clk_ipq806x },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, rpm_clk_match_table);
+
+static struct clk_hw *qcom_rpm_clk_hw_get(struct of_phandle_args *clkspec,
+					  void *data)
+{
+	struct rpm_cc *rcc = data;
+	unsigned int idx = clkspec->args[0];
+
+	if (idx >= rcc->num_clks) {
+		pr_err("%s: invalid index %u\n", __func__, idx);
+		return ERR_PTR(-EINVAL);
+	}
+
+	return rcc->clks[idx] ? &rcc->clks[idx]->hw : ERR_PTR(-ENOENT);
+}
+
+static int rpm_clk_probe(struct platform_device *pdev)
+{
+	struct rpm_cc *rcc;
+	int ret;
+	size_t num_clks, i;
+	struct qcom_rpm *rpm;
+	struct clk_rpm **rpm_clks;
+	const struct rpm_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_clks = desc->clks;
+	num_clks = desc->num_clks;
+
+	rcc = devm_kzalloc(&pdev->dev, sizeof(*rcc), GFP_KERNEL);
+	if (!rcc)
+		return -ENOMEM;
+
+	rcc->clks = rpm_clks;
+	rcc->num_clks = num_clks;
+	mutex_init(&rcc->xo_lock);
+
+	for (i = 0; i < num_clks; i++) {
+		if (!rpm_clks[i])
+			continue;
+
+		rpm_clks[i]->rpm = rpm;
+		rpm_clks[i]->rpm_cc = rcc;
+
+		ret = clk_rpm_handoff(rpm_clks[i]);
+		if (ret)
+			goto err;
+	}
+
+	for (i = 0; i < num_clks; i++) {
+		if (!rpm_clks[i])
+			continue;
+
+		ret = devm_clk_hw_register(&pdev->dev, &rpm_clks[i]->hw);
+		if (ret)
+			goto err;
+	}
+
+	ret = devm_of_clk_add_hw_provider(&pdev->dev, qcom_rpm_clk_hw_get,
+					  rcc);
+	if (ret)
+		goto err;
+
+	return 0;
+err:
+	dev_err(&pdev->dev, "Error registering RPM Clock driver (%d)\n", ret);
+	return ret;
+}
+
+static struct platform_driver rpm_clk_driver = {
+	.driver = {
+		.name = "qcom-clk-rpm",
+		.of_match_table = rpm_clk_match_table,
+	},
+	.probe = rpm_clk_probe,
+};
+
+static int __init rpm_clk_init(void)
+{
+	return platform_driver_register(&rpm_clk_driver);
+}
+core_initcall(rpm_clk_init);
+
+static void __exit rpm_clk_exit(void)
+{
+	platform_driver_unregister(&rpm_clk_driver);
+}
+module_exit(rpm_clk_exit);
+
+MODULE_DESCRIPTION("Qualcomm RPM Clock Controller Driver");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:qcom-clk-rpm");