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From:   Shawn Guo <shawn.guo@linaro.org>
To:     Stephen Boyd <sboyd@kernel.org>
Cc:     Rob Herring <robh+dt@kernel.org>,
        Bjorn Andersson <bjorn.andersson@linaro.org>,
        Loic Poulain <loic.poulain@linaro.org>,
        devicetree@vger.kernel.org, linux-arm-msm@vger.kernel.org,
        linux-clk@vger.kernel.org, linux-kernel@vger.kernel.org,
        Shawn Guo <shawn.guo@linaro.org>
Subject: [PATCH v2 1/3] clk: qcom: smd-rpm: Add .recalc_rate hook for clk_smd_rpm_branch_ops
Date:   Fri, 17 Sep 2021 11:04:32 +0800
Message-Id: <20210917030434.19859-2-shawn.guo@linaro.org>
In-Reply-To: <20210917030434.19859-1-shawn.guo@linaro.org>
References: <20210917030434.19859-1-shawn.guo@linaro.org>
Precedence: bulk

As there is a `rate` field in clk_smd_rpm, clk_smd_rpm_recalc_rate() can
be used by branch clocks to report rate as well, rather than assuming
the rate is always same as parent clock.  This assumption doesn't hold
on platforms like QCM2290, where xo_board is 38.4MHz while bi_tcxo is
19.2MHz.

To get this work, XO buffered clocks need the following updates.

- Assign a correct rate rather than the fake one which is being used to
  generate binary value for clk_smd_rpm_req interface.

- Explicitly handle the clk_smd_rpm_req interface value for XO buffered
  clocks (.rpm_res_type being QCOM_SMD_RPM_CLK_BUF_A).

Suggested-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
---
 drivers/clk/qcom/clk-smd-rpm.c | 76 +++++++++++++++++++---------------
 1 file changed, 43 insertions(+), 33 deletions(-)

diff --git a/drivers/clk/qcom/clk-smd-rpm.c b/drivers/clk/qcom/clk-smd-rpm.c
index 66d7807ee38e..8e16e4836424 100644
--- a/drivers/clk/qcom/clk-smd-rpm.c
+++ b/drivers/clk/qcom/clk-smd-rpm.c
@@ -118,14 +118,15 @@
 		__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 DEFINE_CLK_SMD_RPM_XO_BUFFER(_platform, _name, _active, r_id, r)      \
 		__DEFINE_CLK_SMD_RPM_BRANCH(_platform, _name, _active,	      \
-		QCOM_SMD_RPM_CLK_BUF_A, r_id, 0, 1000,			      \
+		QCOM_SMD_RPM_CLK_BUF_A, r_id, 0, r,			      \
 		QCOM_RPM_KEY_SOFTWARE_ENABLE)
 
-#define DEFINE_CLK_SMD_RPM_XO_BUFFER_PINCTRL(_platform, _name, _active, r_id) \
+#define DEFINE_CLK_SMD_RPM_XO_BUFFER_PINCTRL(_platform, _name, _active,	      \
+					     r_id, r)			      \
 		__DEFINE_CLK_SMD_RPM_BRANCH(_platform, _name, _active,	      \
-		QCOM_SMD_RPM_CLK_BUF_A, r_id, 0, 1000,			      \
+		QCOM_SMD_RPM_CLK_BUF_A, r_id, 0, r,			      \
 		QCOM_RPM_KEY_PIN_CTRL_CLK_BUFFER_ENABLE_KEY)
 
 #define to_clk_smd_rpm(_hw) container_of(_hw, struct clk_smd_rpm, hw)
@@ -195,6 +196,10 @@ static int clk_smd_rpm_set_rate_active(struct clk_smd_rpm *r,
 		.value = cpu_to_le32(DIV_ROUND_UP(rate, 1000)), /* to kHz */
 	};
 
+	/* Buffered clock needs a binary value */
+	if (r->rpm_res_type == QCOM_SMD_RPM_CLK_BUF_A)
+		req.value = !!req.value;
+
 	return qcom_rpm_smd_write(r->rpm, QCOM_SMD_RPM_ACTIVE_STATE,
 				  r->rpm_res_type, r->rpm_clk_id, &req,
 				  sizeof(req));
@@ -209,6 +214,10 @@ static int clk_smd_rpm_set_rate_sleep(struct clk_smd_rpm *r,
 		.value = cpu_to_le32(DIV_ROUND_UP(rate, 1000)), /* to kHz */
 	};
 
+	/* Buffered clock needs a binary value */
+	if (r->rpm_res_type == QCOM_SMD_RPM_CLK_BUF_A)
+		req.value = !!req.value;
+
 	return qcom_rpm_smd_write(r->rpm, QCOM_SMD_RPM_SLEEP_STATE,
 				  r->rpm_res_type, r->rpm_clk_id, &req,
 				  sizeof(req));
@@ -416,20 +425,21 @@ static const struct clk_ops clk_smd_rpm_ops = {
 static const struct clk_ops clk_smd_rpm_branch_ops = {
 	.prepare	= clk_smd_rpm_prepare,
 	.unprepare	= clk_smd_rpm_unprepare,
+	.recalc_rate	= clk_smd_rpm_recalc_rate,
 };
 
 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);
+DEFINE_CLK_SMD_RPM_XO_BUFFER(msm8916, bb_clk1, bb_clk1_a, 1, 19200000);
+DEFINE_CLK_SMD_RPM_XO_BUFFER(msm8916, bb_clk2, bb_clk2_a, 2, 19200000);
+DEFINE_CLK_SMD_RPM_XO_BUFFER(msm8916, rf_clk1, rf_clk1_a, 4, 19200000);
+DEFINE_CLK_SMD_RPM_XO_BUFFER(msm8916, rf_clk2, rf_clk2_a, 5, 19200000);
+DEFINE_CLK_SMD_RPM_XO_BUFFER_PINCTRL(msm8916, bb_clk1_pin, bb_clk1_a_pin, 1, 19200000);
+DEFINE_CLK_SMD_RPM_XO_BUFFER_PINCTRL(msm8916, bb_clk2_pin, bb_clk2_a_pin, 2, 19200000);
+DEFINE_CLK_SMD_RPM_XO_BUFFER_PINCTRL(msm8916, rf_clk1_pin, rf_clk1_a_pin, 4, 19200000);
+DEFINE_CLK_SMD_RPM_XO_BUFFER_PINCTRL(msm8916, rf_clk2_pin, rf_clk2_a_pin, 5, 19200000);
 
 static struct clk_smd_rpm *msm8916_clks[] = {
 	[RPM_SMD_PCNOC_CLK]		= &msm8916_pcnoc_clk,
@@ -503,19 +513,19 @@ DEFINE_CLK_SMD_RPM(msm8974, cnoc_clk, cnoc_a_clk, QCOM_SMD_RPM_BUS_CLK, 2);
 DEFINE_CLK_SMD_RPM(msm8974, mmssnoc_ahb_clk, mmssnoc_ahb_a_clk, QCOM_SMD_RPM_BUS_CLK, 3);
 DEFINE_CLK_SMD_RPM(msm8974, gfx3d_clk_src, gfx3d_a_clk_src, QCOM_SMD_RPM_MEM_CLK, 1);
 DEFINE_CLK_SMD_RPM(msm8974, ocmemgx_clk, ocmemgx_a_clk, QCOM_SMD_RPM_MEM_CLK, 2);
-DEFINE_CLK_SMD_RPM_XO_BUFFER(msm8974, cxo_d0, cxo_d0_a, 1);
-DEFINE_CLK_SMD_RPM_XO_BUFFER(msm8974, cxo_d1, cxo_d1_a, 2);
-DEFINE_CLK_SMD_RPM_XO_BUFFER(msm8974, cxo_a0, cxo_a0_a, 4);
-DEFINE_CLK_SMD_RPM_XO_BUFFER(msm8974, cxo_a1, cxo_a1_a, 5);
-DEFINE_CLK_SMD_RPM_XO_BUFFER(msm8974, cxo_a2, cxo_a2_a, 6);
-DEFINE_CLK_SMD_RPM_XO_BUFFER(msm8974, diff_clk, diff_a_clk, 7);
-DEFINE_CLK_SMD_RPM_XO_BUFFER(msm8974, div_clk1, div_a_clk1, 11);
-DEFINE_CLK_SMD_RPM_XO_BUFFER(msm8974, div_clk2, div_a_clk2, 12);
-DEFINE_CLK_SMD_RPM_XO_BUFFER_PINCTRL(msm8974, cxo_d0_pin, cxo_d0_a_pin, 1);
-DEFINE_CLK_SMD_RPM_XO_BUFFER_PINCTRL(msm8974, cxo_d1_pin, cxo_d1_a_pin, 2);
-DEFINE_CLK_SMD_RPM_XO_BUFFER_PINCTRL(msm8974, cxo_a0_pin, cxo_a0_a_pin, 4);
-DEFINE_CLK_SMD_RPM_XO_BUFFER_PINCTRL(msm8974, cxo_a1_pin, cxo_a1_a_pin, 5);
-DEFINE_CLK_SMD_RPM_XO_BUFFER_PINCTRL(msm8974, cxo_a2_pin, cxo_a2_a_pin, 6);
+DEFINE_CLK_SMD_RPM_XO_BUFFER(msm8974, cxo_d0, cxo_d0_a, 1, 19200000);
+DEFINE_CLK_SMD_RPM_XO_BUFFER(msm8974, cxo_d1, cxo_d1_a, 2, 19200000);
+DEFINE_CLK_SMD_RPM_XO_BUFFER(msm8974, cxo_a0, cxo_a0_a, 4, 19200000);
+DEFINE_CLK_SMD_RPM_XO_BUFFER(msm8974, cxo_a1, cxo_a1_a, 5, 19200000);
+DEFINE_CLK_SMD_RPM_XO_BUFFER(msm8974, cxo_a2, cxo_a2_a, 6, 19200000);
+DEFINE_CLK_SMD_RPM_XO_BUFFER(msm8974, diff_clk, diff_a_clk, 7, 19200000);
+DEFINE_CLK_SMD_RPM_XO_BUFFER(msm8974, div_clk1, div_a_clk1, 11, 19200000);
+DEFINE_CLK_SMD_RPM_XO_BUFFER(msm8974, div_clk2, div_a_clk2, 12, 19200000);
+DEFINE_CLK_SMD_RPM_XO_BUFFER_PINCTRL(msm8974, cxo_d0_pin, cxo_d0_a_pin, 1, 19200000);
+DEFINE_CLK_SMD_RPM_XO_BUFFER_PINCTRL(msm8974, cxo_d1_pin, cxo_d1_a_pin, 2, 19200000);
+DEFINE_CLK_SMD_RPM_XO_BUFFER_PINCTRL(msm8974, cxo_a0_pin, cxo_a0_a_pin, 4, 19200000);
+DEFINE_CLK_SMD_RPM_XO_BUFFER_PINCTRL(msm8974, cxo_a1_pin, cxo_a1_a_pin, 5, 19200000);
+DEFINE_CLK_SMD_RPM_XO_BUFFER_PINCTRL(msm8974, cxo_a2_pin, cxo_a2_a_pin, 6, 19200000);
 
 static struct clk_smd_rpm *msm8974_clks[] = {
 	[RPM_SMD_PNOC_CLK]		= &msm8916_pcnoc_clk,
@@ -603,8 +613,8 @@ static const struct rpm_smd_clk_desc rpm_clk_msm8976 = {
 	.num_clks = ARRAY_SIZE(msm8976_clks),
 };
 
-DEFINE_CLK_SMD_RPM_XO_BUFFER(msm8992, div_clk3, div_clk3_a, 13);
-DEFINE_CLK_SMD_RPM_XO_BUFFER(msm8992, ln_bb_clk, ln_bb_a_clk, 8);
+DEFINE_CLK_SMD_RPM_XO_BUFFER(msm8992, div_clk3, div_clk3_a, 13, 19200000);
+DEFINE_CLK_SMD_RPM_XO_BUFFER(msm8992, ln_bb_clk, ln_bb_a_clk, 8, 19200000);
 
 DEFINE_CLK_SMD_RPM(msm8992, ce1_clk, ce1_a_clk, QCOM_SMD_RPM_CE_CLK, 0);
 DEFINE_CLK_SMD_RPM(msm8992, ce2_clk, ce2_a_clk, QCOM_SMD_RPM_CE_CLK, 1);
@@ -782,7 +792,7 @@ static const struct rpm_smd_clk_desc rpm_clk_msm8996 = {
 
 DEFINE_CLK_SMD_RPM(qcs404, bimc_gpu_clk, bimc_gpu_a_clk, QCOM_SMD_RPM_MEM_CLK, 2);
 DEFINE_CLK_SMD_RPM(qcs404, qpic_clk, qpic_a_clk, QCOM_SMD_RPM_QPIC_CLK, 0);
-DEFINE_CLK_SMD_RPM_XO_BUFFER_PINCTRL(qcs404, ln_bb_clk_pin, ln_bb_clk_a_pin, 8);
+DEFINE_CLK_SMD_RPM_XO_BUFFER_PINCTRL(qcs404, ln_bb_clk_pin, ln_bb_clk_a_pin, 8, 19200000);
 
 static struct clk_smd_rpm *qcs404_clks[] = {
 	[RPM_SMD_QDSS_CLK] = &msm8916_qdss_clk,
@@ -811,13 +821,13 @@ static const struct rpm_smd_clk_desc rpm_clk_qcs404 = {
 };
 
 DEFINE_CLK_SMD_RPM_XO_BUFFER_PINCTRL(msm8998, ln_bb_clk3_pin, ln_bb_clk3_a_pin,
-				     3);
+				     3, 19200000);
 DEFINE_CLK_SMD_RPM(msm8998, aggre1_noc_clk, aggre1_noc_a_clk,
 		   QCOM_SMD_RPM_AGGR_CLK, 1);
 DEFINE_CLK_SMD_RPM(msm8998, aggre2_noc_clk, aggre2_noc_a_clk,
 		   QCOM_SMD_RPM_AGGR_CLK, 2);
-DEFINE_CLK_SMD_RPM_XO_BUFFER(msm8998, rf_clk3, rf_clk3_a, 6);
-DEFINE_CLK_SMD_RPM_XO_BUFFER_PINCTRL(msm8998, rf_clk3_pin, rf_clk3_a_pin, 6);
+DEFINE_CLK_SMD_RPM_XO_BUFFER(msm8998, rf_clk3, rf_clk3_a, 6, 19200000);
+DEFINE_CLK_SMD_RPM_XO_BUFFER_PINCTRL(msm8998, rf_clk3_pin, rf_clk3_a_pin, 6, 19200000);
 static struct clk_smd_rpm *msm8998_clks[] = {
 	[RPM_SMD_BIMC_CLK] = &msm8916_bimc_clk,
 	[RPM_SMD_BIMC_A_CLK] = &msm8916_bimc_a_clk,
@@ -864,8 +874,8 @@ static const struct rpm_smd_clk_desc rpm_clk_msm8998 = {
 
 DEFINE_CLK_SMD_RPM_BRANCH(sdm660, bi_tcxo, bi_tcxo_a, QCOM_SMD_RPM_MISC_CLK, 0,
 								19200000);
-DEFINE_CLK_SMD_RPM_XO_BUFFER(sdm660, ln_bb_clk3, ln_bb_clk3_a, 3);
-DEFINE_CLK_SMD_RPM_XO_BUFFER_PINCTRL(sdm660, ln_bb_clk3_pin, ln_bb_clk3_pin_a, 3);
+DEFINE_CLK_SMD_RPM_XO_BUFFER(sdm660, ln_bb_clk3, ln_bb_clk3_a, 3, 19200000);
+DEFINE_CLK_SMD_RPM_XO_BUFFER_PINCTRL(sdm660, ln_bb_clk3_pin, ln_bb_clk3_pin_a, 3, 19200000);
 
 static struct clk_smd_rpm *sdm660_clks[] = {
 	[RPM_SMD_XO_CLK_SRC] = &sdm660_bi_tcxo,
-- 
2.17.1