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[83.9.29.190]) by smtp.gmail.com with ESMTPSA id l18-20020a19c212000000b004eff1f7f206sm2224053lfc.9.2023.06.14.11.04.46 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 14 Jun 2023 11:04:47 -0700 (PDT) From: Konrad Dybcio Date: Wed, 14 Jun 2023 20:04:28 +0200 Subject: [PATCH v6 09/22] interconnect: qcom: smd-rpm: Add rpmcc handling skeleton code MIME-Version: 1.0 Message-Id: <20230526-topic-smd_icc-v6-9-263283111e66@linaro.org> References: <20230526-topic-smd_icc-v6-0-263283111e66@linaro.org> In-Reply-To: <20230526-topic-smd_icc-v6-0-263283111e66@linaro.org> To: Andy Gross , Bjorn Andersson , Michael Turquette , Stephen Boyd , Georgi Djakov , Leo Yan , Evan Green , Rob Herring , Krzysztof Kozlowski , Conor Dooley Cc: Marijn Suijten , linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-clk@vger.kernel.org, linux-pm@vger.kernel.org, devicetree@vger.kernel.org, Konrad Dybcio , Stephan Gerhold X-Mailer: b4 0.12.2 X-Developer-Signature: v=1; a=ed25519-sha256; t=1686765872; l=3261; i=konrad.dybcio@linaro.org; s=20230215; h=from:subject:message-id; bh=q5JnbdD4AZQp53PuMKdCoeW41i5whKLsOXgMlTL64nI=; b=tafWmjRtwf+e8Suf9DtjEJQCeY2j9wH0XotnHZCko9vHv9bf1sFuh7Y6XEwih31jHwJBEwxj7 1YIhEZFvBEFBgMODgZ+3PcSoWUMdJFrrlfVNP304vDARdlVQ3THNzVG X-Developer-Key: i=konrad.dybcio@linaro.org; a=ed25519; pk=iclgkYvtl2w05SSXO5EjjSYlhFKsJ+5OSZBjOkQuEms= Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org Introduce qcom_icc_rpm_set_bus_rate() in preparation for handling RPM clock resources within the interconnect framework. This lets us greatly simplify all of the code handling, as setting the rate comes down to: u32 rate_khz = max(clk.sleep_rate, clk.active_rate, clk_a.active_rate) write_to_rpm(clock.description, rate_khz); Reviewed-by: Stephan Gerhold Signed-off-by: Konrad Dybcio --- drivers/interconnect/qcom/icc-rpm.h | 15 +++++++++++++++ drivers/interconnect/qcom/smd-rpm.c | 21 +++++++++++++++++++++ 2 files changed, 36 insertions(+) diff --git a/drivers/interconnect/qcom/icc-rpm.h b/drivers/interconnect/qcom/icc-rpm.h index 4755e422d2d1..5c43a8023ffa 100644 --- a/drivers/interconnect/qcom/icc-rpm.h +++ b/drivers/interconnect/qcom/icc-rpm.h @@ -25,6 +25,18 @@ enum qcom_icc_type { QCOM_ICC_QNOC, }; +/** + * struct rpm_clk_resource - RPM bus clock resource + * @resource_type: RPM resource type of the clock resource + * @clock_id: index of the clock resource of a specific resource type + * @branch: whether the resource represents a branch clock +*/ +struct rpm_clk_resource { + u32 resource_type; + u32 clock_id; + bool branch; +}; + #define NUM_BUS_CLKS 2 /** @@ -50,6 +62,7 @@ struct qcom_icc_provider { unsigned int qos_offset; u64 bus_clk_rate[NUM_BUS_CLKS]; struct clk_bulk_data bus_clks[NUM_BUS_CLKS]; + const struct rpm_clk_resource *bus_clk_desc; struct clk_bulk_data *intf_clks; bool keep_alive; bool is_on; @@ -107,6 +120,7 @@ struct qcom_icc_desc { struct qcom_icc_node * const *nodes; size_t num_nodes; const char * const *bus_clocks; + const struct rpm_clk_resource *bus_clk_desc; const char * const *intf_clocks; size_t num_intf_clocks; bool keep_alive; @@ -128,5 +142,6 @@ int qnoc_remove(struct platform_device *pdev); bool qcom_icc_rpm_smd_available(void); int qcom_icc_rpm_smd_send(int ctx, int rsc_type, int id, u32 val); +int qcom_icc_rpm_set_bus_rate(const struct rpm_clk_resource *clk, int ctx, u32 rate); #endif diff --git a/drivers/interconnect/qcom/smd-rpm.c b/drivers/interconnect/qcom/smd-rpm.c index b0183262ba66..24bc994e1a12 100644 --- a/drivers/interconnect/qcom/smd-rpm.c +++ b/drivers/interconnect/qcom/smd-rpm.c @@ -16,6 +16,7 @@ #include "icc-rpm.h" #define RPM_KEY_BW 0x00007762 +#define QCOM_RPM_SMD_KEY_RATE 0x007a484b static struct qcom_smd_rpm *icc_smd_rpm; @@ -44,6 +45,26 @@ int qcom_icc_rpm_smd_send(int ctx, int rsc_type, int id, u32 val) } EXPORT_SYMBOL_GPL(qcom_icc_rpm_smd_send); +int qcom_icc_rpm_set_bus_rate(const struct rpm_clk_resource *clk, int ctx, u32 rate) +{ + struct clk_smd_rpm_req req = { + .key = cpu_to_le32(QCOM_RPM_SMD_KEY_RATE), + .nbytes = cpu_to_le32(sizeof(u32)), + }; + + /* Branch clocks are only on/off */ + if (clk->branch) + rate = !!rate; + + req.value = cpu_to_le32(rate); + return qcom_rpm_smd_write(icc_smd_rpm, + ctx, + clk->resource_type, + clk->clock_id, + &req, sizeof(req)); +} +EXPORT_SYMBOL_GPL(qcom_icc_rpm_set_bus_rate); + static int qcom_icc_rpm_smd_remove(struct platform_device *pdev) { icc_smd_rpm = NULL;