[PATCH V6 0/7] [PATCH V5 0/7] Add interconnect support to QSPI and QUP drivers

[PATCH V6 0/7] [PATCH V5 0/7] Add interconnect support to QSPI and QUP drivers

[Akash Asthana]

V5 depend on below patches.
 - https://lore.kernel.org/patchwork/patch/1237642/ [Add helpers
   for enabling/disabling a path]
 - https://patchwork.kernel.org/patch/11491027/ [Add devm_of_icc_get()
   as exported API for users ]

dt-binding patch for QUP drivers.
 - https://patchwork.kernel.org/patch/11534149/ [Convert QUP bindings
        to YAML and add ICC, pin swap doc]

High level design:
 - QUP wrapper/common driver.
   Vote for QUP core on behalf of earlycon from probe.
   Remove BW vote during earlycon exit call

 - SERIAL driver.
   Vote only for CPU/CORE path because driver is in FIFO mode only
   Vote/unvote from qcom_geni_serial_pm func.
   Bump up the CPU vote from set_termios call based on real time need

 - I2C driver.
   Vote for CORE/CPU/DDR path
   Vote/unvote from runtime resume/suspend callback
   As bus speed for I2C is fixed from probe itself no need for bump up.

 - SPI QUP driver.
   Vote only for CPU/CORE path because driver is in FIFO mode only
   Vote/unvote from runtime resume/suspend callback
   Bump up CPU vote based on real time need per transfer.

 - QSPI driver.
   Vote only for CPU path
   Vote/unvote from runtime resume/suspend callback
   Bump up CPU vote based on real time need per transfer.

Changes in V2:
 - Add devm_of_icc_get() API interconnect core.
 - Add ICC support to common driver to fix earlyconsole crash.

Changes in V3:
 - Define common ICC APIs in geni-se driver and use it across geni based
   I2C,SPI and UART driver.

Changes in V4:
 - Add a patch to ICC core to scale peak requirement
   as twice of average if it is not mentioned explicilty.

Changes in V5:
 - As per Georgi's suggestion removed patch from ICC core for assuming
   peak_bw as twice of average when it's not mentioned, instead assume it
   equall to avg_bw and keep this assumption in ICC client itself.
 - As per Matthias suggestion use enum for GENI QUP ICC paths.

Changes in V6:
 - No Major change

Akash Asthana (7):
  soc: qcom: geni: Support for ICC voting
  soc: qcom-geni-se: Add interconnect support to fix earlycon crash
  i2c: i2c-qcom-geni: Add interconnect support
  spi: spi-geni-qcom: Add interconnect support
  tty: serial: qcom_geni_serial: Add interconnect support
  spi: spi-qcom-qspi: Add interconnect support
  arm64: dts: sc7180: Add interconnect for QUP and QSPI

 arch/arm64/boot/dts/qcom/sc7180.dtsi  | 127 +++++++++++++++++++++++++++
 drivers/i2c/busses/i2c-qcom-geni.c    |  29 +++++-
 drivers/soc/qcom/qcom-geni-se.c       | 160 ++++++++++++++++++++++++++++++++++
 drivers/spi/spi-geni-qcom.c           |  31 ++++++-
 drivers/spi/spi-qcom-qspi.c           |  59 ++++++++++++-
 drivers/tty/serial/qcom_geni_serial.c |  38 +++++++-
 include/linux/qcom-geni-se.h          |  44 ++++++++++
 7 files changed, 482 insertions(+), 6 deletions(-)

-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,\na Linux Foundation Collaborative Project

[PATCH V6 1/7] soc: qcom: geni: Support for ICC voting

[Akash Asthana]

Add necessary macros and structure variables to support ICC BW
voting from individual SE drivers.

Signed-off-by: Akash Asthana <akashast@codeaurora.org>
Reviewed-by: Matthias Kaehlcke <mka@chromium.org>
---
Changes in V2:
 - As per Bjorn's comment dropped enums for ICC paths, given the three
   paths individual members

Changes in V3:
 - Add geni_icc_get, geni_icc_vote_on and geni_icc_vote_off as helper API.
 - Add geni_icc_path structure in common header

Changes in V4:
 - As per Bjorn's comment print error message in geni_icc_get if return
   value is not -EPROBE_DEFER.
 - As per Bjorn's comment remove NULL on path before calling icc_set_bw
   API.
 - As per Bjorn's comment drop __func__ print.
 - As per Matthias's comment, make ICC path a array instead of individual
   member entry in geni_se struct.

Changes in V5:
 - As per Matthias's comment defined enums for ICC paths.
 - Integrate icc_enable/disable with power on/off call for driver.
 - As per Matthias's comment added icc_path_names array to print icc path name
   in failure case.
 - As per Georgi's suggestion assume peak_bw = avg_bw if not mentioned.

Changes in V6:
 - Addressed nitpicks from Matthias.

Note: I have ignored below check patch suggestion because it was throwing
      compilation error as 'icc_ddr' is not compile time comstant.

WARNING: char * array declaration might be better as static const
 - FILE: drivers/soc/qcom/qcom-geni-se.c:726:
 - const char *icc_names[] = {"qup-core", "qup-config", icc_ddr};

 drivers/soc/qcom/qcom-geni-se.c | 92 +++++++++++++++++++++++++++++++++++++++++
 include/linux/qcom-geni-se.h    | 42 +++++++++++++++++++
 2 files changed, 134 insertions(+)

diff --git a/drivers/soc/qcom/qcom-geni-se.c b/drivers/soc/qcom/qcom-geni-se.c
index 7d622ea..0b2526d 100644
--- a/drivers/soc/qcom/qcom-geni-se.c
+++ b/drivers/soc/qcom/qcom-geni-se.c
@@ -92,6 +92,9 @@ struct geni_wrapper {
 	struct clk_bulk_data ahb_clks[NUM_AHB_CLKS];
 };
 
+static const char * const icc_path_names[] = {"qup-core", "qup-config",
+						"qup-memory"};
+
 #define QUP_HW_VER_REG			0x4
 
 /* Common SE registers */
@@ -720,6 +723,95 @@ void geni_se_rx_dma_unprep(struct geni_se *se, dma_addr_t iova, size_t len)
 }
 EXPORT_SYMBOL(geni_se_rx_dma_unprep);
 
+int geni_icc_get(struct geni_se *se, const char *icc_ddr)
+{
+	int i, err;
+	const char *icc_names[] = {"qup-core", "qup-config", icc_ddr};
+
+	for (i = 0; i < ARRAY_SIZE(se->icc_paths); i++) {
+		if (!icc_names[i])
+			continue;
+
+		se->icc_paths[i].path = devm_of_icc_get(se->dev, icc_names[i]);
+		if (IS_ERR(se->icc_paths[i].path))
+			goto err;
+	}
+
+	return 0;
+
+err:
+	err = PTR_ERR(se->icc_paths[i].path);
+	if (err != -EPROBE_DEFER)
+		dev_err_ratelimited(se->dev, "Failed to get ICC path:%s :%d\n",
+					icc_names[i], err);
+	return err;
+
+}
+EXPORT_SYMBOL(geni_icc_get);
+
+void geni_icc_bw_init(struct geni_icc_path *icc_paths, unsigned int avg_bw,
+			unsigned int peak_bw)
+{
+	if (!peak_bw)
+		peak_bw = avg_bw;
+	icc_paths->avg_bw = avg_bw;
+	icc_paths->peak_bw = peak_bw;
+}
+EXPORT_SYMBOL(geni_icc_bw_init);
+
+int geni_icc_set_bw(struct geni_se *se)
+{
+	int i, ret;
+
+	for (i = 0; i < ARRAY_SIZE(se->icc_paths); i++) {
+		ret = icc_set_bw(se->icc_paths[i].path,
+			se->icc_paths[i].avg_bw, se->icc_paths[i].peak_bw);
+		if (ret) {
+			dev_err_ratelimited(se->dev, "ICC BW voting failed on path:%s :%d\n",
+					icc_path_names[i], ret);
+			return ret;
+		}
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL(geni_icc_set_bw);
+
+/* To do: Replace this by icc_bulk_enable once it's implemented in ICC core */
+int geni_icc_enable(struct geni_se *se)
+{
+	int i, ret;
+
+	for (i = 0; i < ARRAY_SIZE(se->icc_paths); i++) {
+		ret = icc_enable(se->icc_paths[i].path);
+		if (ret) {
+			dev_err_ratelimited(se->dev, "ICC enable failed on path:%s :%d\n",
+					icc_path_names[i], ret);
+			return ret;
+		}
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL(geni_icc_enable);
+
+int geni_icc_disable(struct geni_se *se)
+{
+	int i, ret;
+
+	for (i = 0; i < ARRAY_SIZE(se->icc_paths); i++) {
+		ret = icc_disable(se->icc_paths[i].path);
+		if (ret) {
+			dev_err_ratelimited(se->dev, "ICC disable failed on path:%s :%d\n",
+					icc_path_names[i], ret);
+			return ret;
+		}
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL(geni_icc_disable);
+
 static int geni_se_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
diff --git a/include/linux/qcom-geni-se.h b/include/linux/qcom-geni-se.h
index dd46494..7afa08d 100644
--- a/include/linux/qcom-geni-se.h
+++ b/include/linux/qcom-geni-se.h
@@ -6,6 +6,8 @@
 #ifndef _LINUX_QCOM_GENI_SE
 #define _LINUX_QCOM_GENI_SE
 
+#include <linux/interconnect.h>
+
 /* Transfer mode supported by GENI Serial Engines */
 enum geni_se_xfer_mode {
 	GENI_SE_INVALID,
@@ -25,6 +27,18 @@ enum geni_se_protocol_type {
 struct geni_wrapper;
 struct clk;
 
+enum geni_icc_path_index {
+	GENI_TO_CORE,
+	CPU_TO_GENI,
+	GENI_TO_DDR
+};
+
+struct geni_icc_path {
+	struct icc_path *path;
+	unsigned int avg_bw;
+	unsigned int peak_bw;
+};
+
 /**
  * struct geni_se - GENI Serial Engine
  * @base:		Base Address of the Serial Engine's register block
@@ -33,6 +47,7 @@ struct clk;
  * @clk:		Handle to the core serial engine clock
  * @num_clk_levels:	Number of valid clock levels in clk_perf_tbl
  * @clk_perf_tbl:	Table of clock frequency input to serial engine clock
+ * @icc_paths:		Array of ICC paths for SE
  */
 struct geni_se {
 	void __iomem *base;
@@ -41,6 +56,7 @@ struct geni_se {
 	struct clk *clk;
 	unsigned int num_clk_levels;
 	unsigned long *clk_perf_tbl;
+	struct geni_icc_path icc_paths[3];
 };
 
 /* Common SE registers */
@@ -229,6 +245,21 @@ struct geni_se {
 #define GENI_SE_VERSION_MINOR(ver) ((ver & HW_VER_MINOR_MASK) >> HW_VER_MINOR_SHFT)
 #define GENI_SE_VERSION_STEP(ver) (ver & HW_VER_STEP_MASK)
 
+/*
+ * Define bandwidth thresholds that cause the underlying Core 2X interconnect
+ * clock to run at the named frequency. These baseline values are recommended
+ * by the hardware team, and are not dynamically scaled with GENI bandwidth
+ * beyond basic on/off.
+ */
+#define CORE_2X_19_2_MHZ		960
+#define CORE_2X_50_MHZ			2500
+#define CORE_2X_100_MHZ			5000
+#define CORE_2X_150_MHZ			7500
+#define CORE_2X_200_MHZ			10000
+#define CORE_2X_236_MHZ			16383
+
+#define GENI_DEFAULT_BW			Bps_to_icc(1000)
+
 #if IS_ENABLED(CONFIG_QCOM_GENI_SE)
 
 u32 geni_se_get_qup_hw_version(struct geni_se *se);
@@ -416,5 +447,16 @@ int geni_se_rx_dma_prep(struct geni_se *se, void *buf, size_t len,
 void geni_se_tx_dma_unprep(struct geni_se *se, dma_addr_t iova, size_t len);
 
 void geni_se_rx_dma_unprep(struct geni_se *se, dma_addr_t iova, size_t len);
+
+int geni_icc_get(struct geni_se *se, const char *icc_ddr);
+
+int geni_icc_set_bw(struct geni_se *se);
+
+void geni_icc_bw_init(struct geni_icc_path *icc_paths, unsigned int avg_bw,
+			unsigned int peak_bw);
+
+int geni_icc_enable(struct geni_se *se);
+
+int geni_icc_disable(struct geni_se *se);
 #endif
 #endif
-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,\na Linux Foundation Collaborative Project

[PATCH V6 2/7] soc: qcom-geni-se: Add interconnect support to fix earlycon crash

[Akash Asthana]

QUP core clock is shared among all the SE drivers present on particular
QUP wrapper, the system will reset(unclocked access) if earlycon used after
QUP core clock is put to 0 from other SE drivers before real console comes
up.

As earlycon can't vote for it's QUP core need, to fix this add ICC
support to common/QUP wrapper driver and put vote for QUP core from
probe on behalf of earlycon and remove vote during earlycon exit call.

Signed-off-by: Akash Asthana <akashast@codeaurora.org>
Reported-by: Matthias Kaehlcke <mka@chromium.org>
---
Change in V3:
 - Add geni_remove_earlycon_icc_vote API that will be used by earlycon
   exit function to remove ICC vote for earlyconsole.
 - Remove suspend/resume hook for geni-se driver as we are no longer
   removing earlyconsole ICC vote from system suspend, we are removing
   from earlycon exit.

Change in V4:
 - As per Matthias comment make 'earlycon_wrapper' as static structure.

Changes in V5:
 - Vote for core path only after checking whether "qcom_geni" earlycon is
   actually present or not by traversing over structure "console_drivers".

Changes in V6:
 - As per Matthias's comment removed NULL check for console_drivers global
   struct, added NULL check for earlycon_wrapper in _remove_earlycon_icc_vote
   API
 - Addressed nitpicks from Andy.

 drivers/soc/qcom/qcom-geni-se.c       | 68 +++++++++++++++++++++++++++++++++++
 drivers/tty/serial/qcom_geni_serial.c |  7 ++++
 include/linux/qcom-geni-se.h          |  2 ++
 3 files changed, 77 insertions(+)

diff --git a/drivers/soc/qcom/qcom-geni-se.c b/drivers/soc/qcom/qcom-geni-se.c
index 0b2526d..ac16bb1 100644
--- a/drivers/soc/qcom/qcom-geni-se.c
+++ b/drivers/soc/qcom/qcom-geni-se.c
@@ -3,6 +3,7 @@
 
 #include <linux/acpi.h>
 #include <linux/clk.h>
+#include <linux/console.h>
 #include <linux/slab.h>
 #include <linux/dma-mapping.h>
 #include <linux/io.h>
@@ -90,11 +91,14 @@ struct geni_wrapper {
 	struct device *dev;
 	void __iomem *base;
 	struct clk_bulk_data ahb_clks[NUM_AHB_CLKS];
+	struct geni_icc_path to_core;
 };
 
 static const char * const icc_path_names[] = {"qup-core", "qup-config",
 						"qup-memory"};
 
+static struct geni_wrapper *earlycon_wrapper;
+
 #define QUP_HW_VER_REG			0x4
 
 /* Common SE registers */
@@ -812,11 +816,38 @@ int geni_icc_disable(struct geni_se *se)
 }
 EXPORT_SYMBOL(geni_icc_disable);
 
+void geni_remove_earlycon_icc_vote(void)
+{
+	struct geni_wrapper *wrapper;
+	struct device_node *parent;
+	struct device_node *child;
+
+	if (!earlycon_wrapper)
+		return;
+
+	wrapper = earlycon_wrapper;
+	parent = of_get_next_parent(wrapper->dev->of_node);
+	for_each_child_of_node(parent, child) {
+		if (!of_device_is_compatible(child, "qcom,geni-se-qup"))
+			continue;
+		wrapper = platform_get_drvdata(of_find_device_by_node(child));
+		icc_put(wrapper->to_core.path);
+		wrapper->to_core.path = NULL;
+
+	}
+	of_node_put(parent);
+
+	earlycon_wrapper = NULL;
+}
+EXPORT_SYMBOL(geni_remove_earlycon_icc_vote);
+
 static int geni_se_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
 	struct resource *res;
 	struct geni_wrapper *wrapper;
+	struct console __maybe_unused *bcon;
+	bool __maybe_unused has_earlycon = false;
 	int ret;
 
 	wrapper = devm_kzalloc(dev, sizeof(*wrapper), GFP_KERNEL);
@@ -839,6 +870,43 @@ static int geni_se_probe(struct platform_device *pdev)
 		}
 	}
 
+#ifdef CONFIG_SERIAL_EARLYCON
+	for_each_console(bcon) {
+		if (!strcmp(bcon->name, "qcom_geni")) {
+			has_earlycon = true;
+			break;
+		}
+	}
+	if (!has_earlycon)
+		goto exit;
+
+	wrapper->to_core.path = devm_of_icc_get(dev, "qup-core");
+	if (IS_ERR(wrapper->to_core.path))
+		return PTR_ERR(wrapper->to_core.path);
+	/*
+	 * Put minmal BW request on core clocks on behalf of early console.
+	 * The vote will be removed earlycon exit function.
+	 *
+	 * Note: We are putting vote on each QUP wrapper instead only to which
+	 * earlycon is connected because QUP core clock of different wrapper
+	 * share same voltage domain. If core1 is put to 0, then core2 will
+	 * also run at 0, if not voted. Default ICC vote will be removed ASA
+	 * we touch any of the core clock.
+	 * core1 = core2 = max(core1, core2)
+	 */
+	ret = icc_set_bw(wrapper->to_core.path, GENI_DEFAULT_BW,
+				GENI_DEFAULT_BW);
+	if (ret) {
+		dev_err(&pdev->dev, "%s: ICC BW voting failed for core :%d\n",
+			__func__, ret);
+		return ret;
+	}
+
+	if (of_get_compatible_child(pdev->dev.of_node, "qcom,geni-debug-uart"))
+		earlycon_wrapper = wrapper;
+	of_node_put(pdev->dev.of_node);
+#endif
+exit:
 	dev_set_drvdata(dev, wrapper);
 	dev_dbg(dev, "GENI SE Driver probed\n");
 	return devm_of_platform_populate(dev);
diff --git a/drivers/tty/serial/qcom_geni_serial.c b/drivers/tty/serial/qcom_geni_serial.c
index 6119090..8c5d97c 100644
--- a/drivers/tty/serial/qcom_geni_serial.c
+++ b/drivers/tty/serial/qcom_geni_serial.c
@@ -1090,6 +1090,12 @@ static void qcom_geni_serial_earlycon_write(struct console *con,
 	__qcom_geni_serial_console_write(&dev->port, s, n);
 }
 
+static int qcom_geni_serial_earlycon_exit(struct console *con)
+{
+	geni_remove_earlycon_icc_vote();
+	return 0;
+}
+
 static int __init qcom_geni_serial_earlycon_setup(struct earlycon_device *dev,
 								const char *opt)
 {
@@ -1135,6 +1141,7 @@ static int __init qcom_geni_serial_earlycon_setup(struct earlycon_device *dev,
 	writel(stop_bit_len, uport->membase + SE_UART_TX_STOP_BIT_LEN);
 
 	dev->con->write = qcom_geni_serial_earlycon_write;
+	dev->con->exit = qcom_geni_serial_earlycon_exit;
 	dev->con->setup = NULL;
 	return 0;
 }
diff --git a/include/linux/qcom-geni-se.h b/include/linux/qcom-geni-se.h
index 7afa08d..51e9e9b 100644
--- a/include/linux/qcom-geni-se.h
+++ b/include/linux/qcom-geni-se.h
@@ -458,5 +458,7 @@ void geni_icc_bw_init(struct geni_icc_path *icc_paths, unsigned int avg_bw,
 int geni_icc_enable(struct geni_se *se);
 
 int geni_icc_disable(struct geni_se *se);
+
+void geni_remove_earlycon_icc_vote(void);
 #endif
 #endif
-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,\na Linux Foundation Collaborative Project

[PATCH V6 3/7] i2c: i2c-qcom-geni: Add interconnect support

[Akash Asthana]

Get the interconnect paths for I2C based Serial Engine device
and vote according to the bus speed of the driver.

Signed-off-by: Akash Asthana <akashast@codeaurora.org>
Reviewed-by: Matthias Kaehlcke <mka@chromium.org>
Acked-by: Wolfram Sang <wsa@kernel.org>
---
Changes in V2:
 - As per Bjorn's comment, removed se == NULL check from geni_i2c_icc_get
 - As per Bjorn's comment, removed code to set se->icc_path* to NULL in failure
 - As per Bjorn's comment, introduced and using devm_of_icc_get API for getting
   path handle
 - As per Matthias comment, added error handling for icc_set_bw call

Changes in V3:
 - As per Matthias comment, use common library APIs defined in geni-se
   driver for ICC functionality.

Changes in V4:
 - Move peak_bw guess as twice of avg_bw if nothing mentioned explicitly
   to ICC core.

Changes in V5:
 - Use icc_enable/disable in power on/off call.

Changes in V6:
 - No changes

 drivers/i2c/busses/i2c-qcom-geni.c | 29 ++++++++++++++++++++++++++++-
 1 file changed, 28 insertions(+), 1 deletion(-)

diff --git a/drivers/i2c/busses/i2c-qcom-geni.c b/drivers/i2c/busses/i2c-qcom-geni.c
index 18d1e4f..f2e786d 100644
--- a/drivers/i2c/busses/i2c-qcom-geni.c
+++ b/drivers/i2c/busses/i2c-qcom-geni.c
@@ -557,6 +557,25 @@ static int geni_i2c_probe(struct platform_device *pdev)
 	gi2c->adap.dev.of_node = dev->of_node;
 	strlcpy(gi2c->adap.name, "Geni-I2C", sizeof(gi2c->adap.name));
 
+	ret = geni_icc_get(&gi2c->se, "qup-memory");
+	if (ret)
+		return ret;
+	/*
+	 * Set the bus quota for core and cpu to a reasonable value for
+	 * register access.
+	 * Set quota for DDR based on bus speed.
+	 */
+	geni_icc_bw_init(&gi2c->se.icc_paths[GENI_TO_CORE], GENI_DEFAULT_BW,
+				0);
+	geni_icc_bw_init(&gi2c->se.icc_paths[CPU_TO_GENI], GENI_DEFAULT_BW,
+				0);
+	geni_icc_bw_init(&gi2c->se.icc_paths[GENI_TO_DDR],
+				Bps_to_icc(gi2c->clk_freq_out), 0);
+
+	ret = geni_icc_set_bw(&gi2c->se);
+	if (ret)
+		return ret;
+
 	ret = geni_se_resources_on(&gi2c->se);
 	if (ret) {
 		dev_err(dev, "Error turning on resources %d\n", ret);
@@ -579,6 +598,10 @@ static int geni_i2c_probe(struct platform_device *pdev)
 		return ret;
 	}
 
+	ret = geni_icc_disable(&gi2c->se);
+	if (ret)
+		return ret;
+
 	dev_dbg(dev, "i2c fifo/se-dma mode. fifo depth:%d\n", tx_depth);
 
 	gi2c->suspended = 1;
@@ -623,7 +646,7 @@ static int __maybe_unused geni_i2c_runtime_suspend(struct device *dev)
 		gi2c->suspended = 1;
 	}
 
-	return 0;
+	return geni_icc_disable(&gi2c->se);
 }
 
 static int __maybe_unused geni_i2c_runtime_resume(struct device *dev)
@@ -631,6 +654,10 @@ static int __maybe_unused geni_i2c_runtime_resume(struct device *dev)
 	int ret;
 	struct geni_i2c_dev *gi2c = dev_get_drvdata(dev);
 
+	ret = geni_icc_enable(&gi2c->se);
+	if (ret)
+		return ret;
+
 	ret = geni_se_resources_on(&gi2c->se);
 	if (ret)
 		return ret;
-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,\na Linux Foundation Collaborative Project

[PATCH V6 4/7] spi: spi-geni-qcom: Add interconnect support

[Akash Asthana]

Get the interconnect paths for SPI based Serial Engine device
and vote according to the current bus speed of the driver.

Signed-off-by: Akash Asthana <akashast@codeaurora.org>
Reviewed-by: Matthias Kaehlcke <mka@chromium.org>
Acked-by: Mark Brown <broonie@kernel.org>
---
Changes in V2:
 - As per Bjorn's comment, removed se == NULL check from geni_spi_icc_get
 - As per Bjorn's comment, removed code to set se->icc_path* to NULL in failure
 - As per Bjorn's comment, introduced and using devm_of_icc_get API for getting
   path handle
 - As per Matthias comment, added error handling for icc_set_bw call

Changes in V3:
 - As per Matthias's comment, use helper ICC function from geni-se driver.

Changes in V4:
 - Move peak_bw guess as twice of avg_bw if nothing mentioned explicitly
   to ICC core.

Changes in V5:
 - Use icc_enable/disable in power on/off call.
 - Save some non-zero avg/peak value to ICC core by calling geni_icc_set_bw
   from probe so that when resume/icc_enable is called NOC are running at
   some non-zero value. No need to call icc_disable after BW vote because
   device will resume and suspend before probe return and will leave ICC in
   disabled state.

Changes in V6:
 - No change

 drivers/spi/spi-geni-qcom.c | 31 ++++++++++++++++++++++++++++++-
 1 file changed, 30 insertions(+), 1 deletion(-)

diff --git a/drivers/spi/spi-geni-qcom.c b/drivers/spi/spi-geni-qcom.c
index c397242..cc637d2 100644
--- a/drivers/spi/spi-geni-qcom.c
+++ b/drivers/spi/spi-geni-qcom.c
@@ -234,6 +234,13 @@ static int setup_fifo_params(struct spi_device *spi_slv,
 		return ret;
 	}
 
+	/* Set BW quota for CPU as driver supports FIFO mode only. */
+	geni_icc_bw_init(&se->icc_paths[CPU_TO_GENI],
+				Bps_to_icc(mas->cur_speed_hz), 0);
+	ret = geni_icc_set_bw(se);
+	if (ret)
+		return ret;
+
 	clk_sel = idx & CLK_SEL_MSK;
 	m_clk_cfg = (div << CLK_DIV_SHFT) | SER_CLK_EN;
 	spi_setup_word_len(mas, spi_slv->mode, spi_slv->bits_per_word);
@@ -578,6 +585,18 @@ static int spi_geni_probe(struct platform_device *pdev)
 	spin_lock_init(&mas->lock);
 	pm_runtime_enable(dev);
 
+	ret = geni_icc_get(&mas->se, NULL);
+	if (ret)
+		goto spi_geni_probe_runtime_disable;
+	/* Set the bus quota to a reasonable value for register access */
+	geni_icc_bw_init(&mas->se.icc_paths[GENI_TO_CORE],
+			Bps_to_icc(CORE_2X_50_MHZ), 0);
+	geni_icc_bw_init(&mas->se.icc_paths[CPU_TO_GENI], GENI_DEFAULT_BW, 0);
+
+	ret = geni_icc_set_bw(&mas->se);
+	if (ret)
+		goto spi_geni_probe_runtime_disable;
+
 	ret = spi_geni_init(mas);
 	if (ret)
 		goto spi_geni_probe_runtime_disable;
@@ -616,14 +635,24 @@ static int __maybe_unused spi_geni_runtime_suspend(struct device *dev)
 {
 	struct spi_master *spi = dev_get_drvdata(dev);
 	struct spi_geni_master *mas = spi_master_get_devdata(spi);
+	int ret;
+
+	ret = geni_se_resources_off(&mas->se);
+	if (ret)
+		return ret;
 
-	return geni_se_resources_off(&mas->se);
+	return geni_icc_disable(&mas->se);
 }
 
 static int __maybe_unused spi_geni_runtime_resume(struct device *dev)
 {
 	struct spi_master *spi = dev_get_drvdata(dev);
 	struct spi_geni_master *mas = spi_master_get_devdata(spi);
+	int ret;
+
+	ret = geni_icc_enable(&mas->se);
+	if (ret)
+		return ret;
 
 	return geni_se_resources_on(&mas->se);
 }
-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,\na Linux Foundation Collaborative Project

[PATCH V6 5/7] tty: serial: qcom_geni_serial: Add interconnect support

[Akash Asthana]

Get the interconnect paths for Uart based Serial Engine device
and vote according to the baud rate requirement of the driver.

Signed-off-by: Akash Asthana <akashast@codeaurora.org>
Reviewed-by: Matthias Kaehlcke <mka@chromium.org>
---
Changes in V2:
 - As per Bjorn's comment, removed se == NULL check from geni_serial_icc_get
 - As per Bjorn's comment, removed code to set se->icc_path* to NULL in failure
 - As per Bjorn's comment, introduced and using devm_of_icc_get API for getting
   path handle
 - As per Matthias comment, added error handling for icc_set_bw call

Changes in V3:
 - As per Matthias comment, use common library APIs defined in geni-se
   driver for ICC functionality.

Changes in V4:
 - As per Mark's comment move peak_bw guess as twice of avg_bw if
   nothing mentioned explicitly to ICC core.
 - As per Matthias's comment select core clock BW based on baud rate.
   If it's less than 115200 go for GENI_DEFAULT_BW else CORE_2X_50_MHZ

Changes in V5:
 - Add icc_enable/disable to power on/off call.
 - Save some non-zero avg/peak value to ICC core by calling geni_icc_set_bw
   from probe so that when resume/icc_enable is called NOC are running at
   some non-zero value. No need to call icc_disable after BW vote because
   console devices are expected to be in active state from the probe itself
   and qcom_geni_serial_pm(STATE_OFF) will be called for non-console ones.

Changes in V6:
 - No change

 drivers/tty/serial/qcom_geni_serial.c | 31 ++++++++++++++++++++++++++++---
 1 file changed, 28 insertions(+), 3 deletions(-)

diff --git a/drivers/tty/serial/qcom_geni_serial.c b/drivers/tty/serial/qcom_geni_serial.c
index 8c5d97c..2a1da36 100644
--- a/drivers/tty/serial/qcom_geni_serial.c
+++ b/drivers/tty/serial/qcom_geni_serial.c
@@ -944,6 +944,7 @@ static void qcom_geni_serial_set_termios(struct uart_port *uport,
 	struct qcom_geni_serial_port *port = to_dev_port(uport, uport);
 	unsigned long clk_rate;
 	u32 ver, sampling_rate;
+	unsigned int avg_bw_core;
 
 	qcom_geni_serial_stop_rx(uport);
 	/* baud rate */
@@ -965,6 +966,16 @@ static void qcom_geni_serial_set_termios(struct uart_port *uport,
 	ser_clk_cfg = SER_CLK_EN;
 	ser_clk_cfg |= clk_div << CLK_DIV_SHFT;
 
+	/*
+	 * Bump up BW vote on CPU and CORE path as driver supports FIFO mode
+	 * only.
+	 */
+	avg_bw_core = (baud > 115200) ? Bps_to_icc(CORE_2X_50_MHZ)
+						: GENI_DEFAULT_BW;
+	geni_icc_bw_init(&port->se.icc_paths[GENI_TO_CORE], avg_bw_core, 0);
+	geni_icc_bw_init(&port->se.icc_paths[CPU_TO_GENI], Bps_to_icc(baud), 0);
+	geni_icc_set_bw(&port->se);
+
 	/* parity */
 	tx_trans_cfg = readl(uport->membase + SE_UART_TX_TRANS_CFG);
 	tx_parity_cfg = readl(uport->membase + SE_UART_TX_PARITY_CFG);
@@ -1202,11 +1213,14 @@ static void qcom_geni_serial_pm(struct uart_port *uport,
 	if (old_state == UART_PM_STATE_UNDEFINED)
 		old_state = UART_PM_STATE_OFF;
 
-	if (new_state == UART_PM_STATE_ON && old_state == UART_PM_STATE_OFF)
+	if (new_state == UART_PM_STATE_ON && old_state == UART_PM_STATE_OFF) {
+		geni_icc_enable(&port->se);
 		geni_se_resources_on(&port->se);
-	else if (new_state == UART_PM_STATE_OFF &&
-			old_state == UART_PM_STATE_ON)
+	} else if (new_state == UART_PM_STATE_OFF &&
+			old_state == UART_PM_STATE_ON) {
 		geni_se_resources_off(&port->se);
+		geni_icc_disable(&port->se);
+	}
 }
 
 static const struct uart_ops qcom_geni_console_pops = {
@@ -1304,6 +1318,17 @@ static int qcom_geni_serial_probe(struct platform_device *pdev)
 			return -ENOMEM;
 	}
 
+	ret = geni_icc_get(&port->se, NULL);
+	if (ret)
+		return ret;
+	geni_icc_bw_init(&port->se.icc_paths[GENI_TO_CORE], GENI_DEFAULT_BW, 0);
+	geni_icc_bw_init(&port->se.icc_paths[CPU_TO_GENI], GENI_DEFAULT_BW, 0);
+
+	/* Set BW for register access */
+	ret = geni_icc_set_bw(&port->se);
+	if (ret)
+		return ret;
+
 	port->name = devm_kasprintf(uport->dev, GFP_KERNEL,
 			"qcom_geni_serial_%s%d",
 			uart_console(uport) ? "console" : "uart", uport->line);
-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,\na Linux Foundation Collaborative Project

[PATCH V6 6/7] spi: spi-qcom-qspi: Add interconnect support

[Akash Asthana]

Get the interconnect paths for QSPI device and vote according to the
current bus speed of the driver.

Signed-off-by: Akash Asthana <akashast@codeaurora.org>
Acked-by: Mark Brown <broonie@kernel.org>
---
Changes in V2:
 - As per Bjorn's comment, introduced and using devm_of_icc_get API for getting
   path handle
 - As per Matthias comment, added error handling for icc_set_bw call

Changes in V3:
 - No Change.

Changes in V4:
 - As per Mark's comment move peak_bw guess as twice of avg_bw if
   nothing mentioned explicitly to ICC core.

Changes in V5:
 - Add icc_enable/disable to power on/off call.
 - Save some non-zero avg/peak value to ICC core by calling geni_icc_set_bw
   from probe so that when resume/icc_enable is called NOC are running at
   some non-zero value.

Changes in V6:
 - As per Matthias's comment made print statement consistent across driver

 drivers/spi/spi-qcom-qspi.c | 59 ++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 58 insertions(+), 1 deletion(-)

diff --git a/drivers/spi/spi-qcom-qspi.c b/drivers/spi/spi-qcom-qspi.c
index 3c4f83b..d76001a 100644
--- a/drivers/spi/spi-qcom-qspi.c
+++ b/drivers/spi/spi-qcom-qspi.c
@@ -2,6 +2,7 @@
 // Copyright (c) 2017-2018, The Linux foundation. All rights reserved.
 
 #include <linux/clk.h>
+#include <linux/interconnect.h>
 #include <linux/interrupt.h>
 #include <linux/io.h>
 #include <linux/module.h>
@@ -139,7 +140,10 @@ struct qcom_qspi {
 	struct device *dev;
 	struct clk_bulk_data *clks;
 	struct qspi_xfer xfer;
-	/* Lock to protect xfer and IRQ accessed registers */
+	struct icc_path *icc_path_cpu_to_qspi;
+	unsigned int avg_bw_cpu;
+	unsigned int peak_bw_cpu;
+	/* Lock to protect data accessed by IRQs */
 	spinlock_t lock;
 };
 
@@ -241,6 +245,20 @@ static int qcom_qspi_transfer_one(struct spi_master *master,
 		return ret;
 	}
 
+	/*
+	 * Set BW quota for CPU as driver supports FIFO mode only.
+	 * We don't have explicit peak requirement so keep it equal to avg_bw.
+	 */
+	ctrl->avg_bw_cpu = Bps_to_icc(speed_hz);
+	ctrl->peak_bw_cpu = ctrl->avg_bw_cpu;
+	ret = icc_set_bw(ctrl->icc_path_cpu_to_qspi, ctrl->avg_bw_cpu,
+		ctrl->peak_bw_cpu);
+	if (ret) {
+		dev_err(ctrl->dev, "%s: ICC BW voting failed for cpu :%d\n",
+			__func__, ret);
+		return ret;
+	}
+
 	spin_lock_irqsave(&ctrl->lock, flags);
 
 	/* We are half duplex, so either rx or tx will be set */
@@ -458,6 +476,29 @@ static int qcom_qspi_probe(struct platform_device *pdev)
 	if (ret)
 		goto exit_probe_master_put;
 
+	ctrl->icc_path_cpu_to_qspi = devm_of_icc_get(dev, "qspi-config");
+	if (IS_ERR(ctrl->icc_path_cpu_to_qspi)) {
+		ret = PTR_ERR(ctrl->icc_path_cpu_to_qspi);
+		if (ret != -EPROBE_DEFER)
+			dev_err(dev, "Failed to get cpu path :%d\n", ret);
+		goto exit_probe_master_put;
+	}
+	/* Set BW vote for register access */
+	ret = icc_set_bw(ctrl->icc_path_cpu_to_qspi, Bps_to_icc(1000),
+				Bps_to_icc(1000));
+	if (ret) {
+		dev_err(ctrl->dev, "%s: ICC BW voting failed for cpu :%d\n",
+				__func__, ret);
+		goto exit_probe_master_put;
+	}
+
+	ret = icc_disable(ctrl->icc_path_cpu_to_qspi);
+	if (ret) {
+		dev_err(ctrl->dev, "%s: ICC disable failed for cpu :%d\n",
+				__func__, ret);
+		goto exit_probe_master_put;
+	}
+
 	ret = platform_get_irq(pdev, 0);
 	if (ret < 0)
 		goto exit_probe_master_put;
@@ -511,9 +552,17 @@ static int __maybe_unused qcom_qspi_runtime_suspend(struct device *dev)
 {
 	struct spi_master *master = dev_get_drvdata(dev);
 	struct qcom_qspi *ctrl = spi_master_get_devdata(master);
+	int ret;
 
 	clk_bulk_disable_unprepare(QSPI_NUM_CLKS, ctrl->clks);
 
+	ret = icc_disable(ctrl->icc_path_cpu_to_qspi);
+	if (ret) {
+		dev_err_ratelimited(ctrl->dev, "%s: ICC disable failed for cpu :%d\n",
+			__func__, ret);
+		return ret;
+	}
+
 	return 0;
 }
 
@@ -521,6 +570,14 @@ static int __maybe_unused qcom_qspi_runtime_resume(struct device *dev)
 {
 	struct spi_master *master = dev_get_drvdata(dev);
 	struct qcom_qspi *ctrl = spi_master_get_devdata(master);
+	int ret;
+
+	ret = icc_enable(ctrl->icc_path_cpu_to_qspi);
+	if (ret) {
+		dev_err_ratelimited(ctrl->dev, "%s: ICC enable failed for cpu :%d\n",
+			__func__, ret);
+		return ret;
+	}
 
 	return clk_bulk_prepare_enable(QSPI_NUM_CLKS, ctrl->clks);
 }
-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,\na Linux Foundation Collaborative Project

[PATCH V6 7/7] arm64: dts: sc7180: Add interconnect for QUP and QSPI

[Akash Asthana]

Add interconnect ports for GENI QUPs and QSPI to set bus capabilities.

Signed-off-by: Akash Asthana <akashast@codeaurora.org>
---
Changes in V2:
 - As per Bjorn's comment, ignoring 80 char limit in defining interconnects
   paths.

Changes in V3:
 - No change.

Change in V4:
 - No change.

Changes in V5:
 - No change.

Chnages in V6:
 - No change.

 arch/arm64/boot/dts/qcom/sc7180.dtsi | 127 +++++++++++++++++++++++++++++++++++
 1 file changed, 127 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/sc7180.dtsi b/arch/arm64/boot/dts/qcom/sc7180.dtsi
index 6b12c60..e1fd3d4 100644
--- a/arch/arm64/boot/dts/qcom/sc7180.dtsi
+++ b/arch/arm64/boot/dts/qcom/sc7180.dtsi
@@ -547,6 +547,8 @@
 			#size-cells = <2>;
 			ranges;
 			iommus = <&apps_smmu 0x43 0x0>;
+			interconnects = <&qup_virt MASTER_QUP_CORE_0 &qup_virt SLAVE_QUP_CORE_0>;
+			interconnect-names = "qup-core";
 			status = "disabled";
 
 			i2c0: i2c@880000 {
@@ -559,6 +561,11 @@
 				interrupts = <GIC_SPI 601 IRQ_TYPE_LEVEL_HIGH>;
 				#address-cells = <1>;
 				#size-cells = <0>;
+				interconnects = <&qup_virt MASTER_QUP_CORE_0 &qup_virt SLAVE_QUP_CORE_0>,
+						<&gem_noc MASTER_APPSS_PROC &config_noc SLAVE_QUP_0>,
+						<&aggre1_noc MASTER_QUP_0 &mc_virt SLAVE_EBI1>;
+				interconnect-names = "qup-core", "qup-config",
+							"qup-memory";
 				status = "disabled";
 			};
 
@@ -572,6 +579,9 @@
 				interrupts = <GIC_SPI 601 IRQ_TYPE_LEVEL_HIGH>;
 				#address-cells = <1>;
 				#size-cells = <0>;
+				interconnects = <&qup_virt MASTER_QUP_CORE_0 &qup_virt SLAVE_QUP_CORE_0>,
+						<&gem_noc MASTER_APPSS_PROC &config_noc SLAVE_QUP_0>;
+				interconnect-names = "qup-core", "qup-config";
 				status = "disabled";
 			};
 
@@ -583,6 +593,9 @@
 				pinctrl-names = "default";
 				pinctrl-0 = <&qup_uart0_default>;
 				interrupts = <GIC_SPI 601 IRQ_TYPE_LEVEL_HIGH>;
+				interconnects = <&qup_virt MASTER_QUP_CORE_0 &qup_virt SLAVE_QUP_CORE_0>,
+						<&gem_noc MASTER_APPSS_PROC &config_noc SLAVE_QUP_0>;
+				interconnect-names = "qup-core", "qup-config";
 				status = "disabled";
 			};
 
@@ -596,6 +609,11 @@
 				interrupts = <GIC_SPI 602 IRQ_TYPE_LEVEL_HIGH>;
 				#address-cells = <1>;
 				#size-cells = <0>;
+				interconnects = <&qup_virt MASTER_QUP_CORE_0 &qup_virt SLAVE_QUP_CORE_0>,
+						<&gem_noc MASTER_APPSS_PROC &config_noc SLAVE_QUP_0>,
+						<&aggre1_noc MASTER_QUP_0 &mc_virt SLAVE_EBI1>;
+				interconnect-names = "qup-core", "qup-config",
+							"qup-memory";
 				status = "disabled";
 			};
 
@@ -609,6 +627,9 @@
 				interrupts = <GIC_SPI 602 IRQ_TYPE_LEVEL_HIGH>;
 				#address-cells = <1>;
 				#size-cells = <0>;
+				interconnects = <&qup_virt MASTER_QUP_CORE_0 &qup_virt SLAVE_QUP_CORE_0>,
+						<&gem_noc MASTER_APPSS_PROC &config_noc SLAVE_QUP_0>;
+				interconnect-names = "qup-core", "qup-config";
 				status = "disabled";
 			};
 
@@ -620,6 +641,9 @@
 				pinctrl-names = "default";
 				pinctrl-0 = <&qup_uart1_default>;
 				interrupts = <GIC_SPI 602 IRQ_TYPE_LEVEL_HIGH>;
+				interconnects = <&qup_virt MASTER_QUP_CORE_0 &qup_virt SLAVE_QUP_CORE_0>,
+						<&gem_noc MASTER_APPSS_PROC &config_noc SLAVE_QUP_0>;
+				interconnect-names = "qup-core", "qup-config";
 				status = "disabled";
 			};
 
@@ -633,6 +657,11 @@
 				interrupts = <GIC_SPI 603 IRQ_TYPE_LEVEL_HIGH>;
 				#address-cells = <1>;
 				#size-cells = <0>;
+				interconnects = <&qup_virt MASTER_QUP_CORE_0 &qup_virt SLAVE_QUP_CORE_0>,
+						<&gem_noc MASTER_APPSS_PROC &config_noc SLAVE_QUP_0>,
+						<&aggre1_noc MASTER_QUP_0 &mc_virt SLAVE_EBI1>;
+				interconnect-names = "qup-core", "qup-config",
+							"qup-memory";
 				status = "disabled";
 			};
 
@@ -644,6 +673,9 @@
 				pinctrl-names = "default";
 				pinctrl-0 = <&qup_uart2_default>;
 				interrupts = <GIC_SPI 603 IRQ_TYPE_LEVEL_HIGH>;
+				interconnects = <&qup_virt MASTER_QUP_CORE_0 &qup_virt SLAVE_QUP_CORE_0>,
+						<&gem_noc MASTER_APPSS_PROC &config_noc SLAVE_QUP_0>;
+				interconnect-names = "qup-core", "qup-config";
 				status = "disabled";
 			};
 
@@ -657,6 +689,11 @@
 				interrupts = <GIC_SPI 604 IRQ_TYPE_LEVEL_HIGH>;
 				#address-cells = <1>;
 				#size-cells = <0>;
+				interconnects = <&qup_virt MASTER_QUP_CORE_0 &qup_virt SLAVE_QUP_CORE_0>,
+						<&gem_noc MASTER_APPSS_PROC &config_noc SLAVE_QUP_0>,
+						<&aggre1_noc MASTER_QUP_0 &mc_virt SLAVE_EBI1>;
+				interconnect-names = "qup-core", "qup-config",
+							"qup-memory";
 				status = "disabled";
 			};
 
@@ -670,6 +707,9 @@
 				interrupts = <GIC_SPI 604 IRQ_TYPE_LEVEL_HIGH>;
 				#address-cells = <1>;
 				#size-cells = <0>;
+				interconnects = <&qup_virt MASTER_QUP_CORE_0 &qup_virt SLAVE_QUP_CORE_0>,
+						<&gem_noc MASTER_APPSS_PROC &config_noc SLAVE_QUP_0>;
+				interconnect-names = "qup-core", "qup-config";
 				status = "disabled";
 			};
 
@@ -681,6 +721,9 @@
 				pinctrl-names = "default";
 				pinctrl-0 = <&qup_uart3_default>;
 				interrupts = <GIC_SPI 604 IRQ_TYPE_LEVEL_HIGH>;
+				interconnects = <&qup_virt MASTER_QUP_CORE_0 &qup_virt SLAVE_QUP_CORE_0>,
+						<&gem_noc MASTER_APPSS_PROC &config_noc SLAVE_QUP_0>;
+				interconnect-names = "qup-core", "qup-config";
 				status = "disabled";
 			};
 
@@ -694,6 +737,11 @@
 				interrupts = <GIC_SPI 605 IRQ_TYPE_LEVEL_HIGH>;
 				#address-cells = <1>;
 				#size-cells = <0>;
+				interconnects = <&qup_virt MASTER_QUP_CORE_0 &qup_virt SLAVE_QUP_CORE_0>,
+						<&gem_noc MASTER_APPSS_PROC &config_noc SLAVE_QUP_0>,
+						<&aggre1_noc MASTER_QUP_0 &mc_virt SLAVE_EBI1>;
+				interconnect-names = "qup-core", "qup-config",
+							"qup-memory";
 				status = "disabled";
 			};
 
@@ -705,6 +753,9 @@
 				pinctrl-names = "default";
 				pinctrl-0 = <&qup_uart4_default>;
 				interrupts = <GIC_SPI 605 IRQ_TYPE_LEVEL_HIGH>;
+				interconnects = <&qup_virt MASTER_QUP_CORE_0 &qup_virt SLAVE_QUP_CORE_0>,
+						<&gem_noc MASTER_APPSS_PROC &config_noc SLAVE_QUP_0>;
+				interconnect-names = "qup-core", "qup-config";
 				status = "disabled";
 			};
 
@@ -718,6 +769,11 @@
 				interrupts = <GIC_SPI 606 IRQ_TYPE_LEVEL_HIGH>;
 				#address-cells = <1>;
 				#size-cells = <0>;
+				interconnects = <&qup_virt MASTER_QUP_CORE_0 &qup_virt SLAVE_QUP_CORE_0>,
+						<&gem_noc MASTER_APPSS_PROC &config_noc SLAVE_QUP_0>,
+						<&aggre1_noc MASTER_QUP_0 &mc_virt SLAVE_EBI1>;
+				interconnect-names = "qup-core", "qup-config",
+							"qup-memory";
 				status = "disabled";
 			};
 
@@ -731,6 +787,9 @@
 				interrupts = <GIC_SPI 606 IRQ_TYPE_LEVEL_HIGH>;
 				#address-cells = <1>;
 				#size-cells = <0>;
+				interconnects = <&qup_virt MASTER_QUP_CORE_0 &qup_virt SLAVE_QUP_CORE_0>,
+						<&gem_noc MASTER_APPSS_PROC &config_noc SLAVE_QUP_0>;
+				interconnect-names = "qup-core", "qup-config";
 				status = "disabled";
 			};
 
@@ -742,6 +801,9 @@
 				pinctrl-names = "default";
 				pinctrl-0 = <&qup_uart5_default>;
 				interrupts = <GIC_SPI 606 IRQ_TYPE_LEVEL_HIGH>;
+				interconnects = <&qup_virt MASTER_QUP_CORE_0 &qup_virt SLAVE_QUP_CORE_0>,
+						<&gem_noc MASTER_APPSS_PROC &config_noc SLAVE_QUP_0>;
+				interconnect-names = "qup-core", "qup-config";
 				status = "disabled";
 			};
 		};
@@ -756,6 +818,8 @@
 			#size-cells = <2>;
 			ranges;
 			iommus = <&apps_smmu 0x4c3 0x0>;
+			interconnects = <&qup_virt MASTER_QUP_CORE_1 &qup_virt SLAVE_QUP_CORE_1>;
+			interconnect-names = "qup-core";
 			status = "disabled";
 
 			i2c6: i2c@a80000 {
@@ -768,6 +832,11 @@
 				interrupts = <GIC_SPI 353 IRQ_TYPE_LEVEL_HIGH>;
 				#address-cells = <1>;
 				#size-cells = <0>;
+				interconnects = <&qup_virt MASTER_QUP_CORE_1 &qup_virt SLAVE_QUP_CORE_1>,
+						<&gem_noc MASTER_APPSS_PROC &config_noc SLAVE_QUP_1>,
+						<&aggre2_noc MASTER_QUP_1 &mc_virt SLAVE_EBI1>;
+				interconnect-names = "qup-core", "qup-config",
+							"qup-memory";
 				status = "disabled";
 			};
 
@@ -781,6 +850,9 @@
 				interrupts = <GIC_SPI 353 IRQ_TYPE_LEVEL_HIGH>;
 				#address-cells = <1>;
 				#size-cells = <0>;
+				interconnects = <&qup_virt MASTER_QUP_CORE_1 &qup_virt SLAVE_QUP_CORE_1>,
+						<&gem_noc MASTER_APPSS_PROC &config_noc SLAVE_QUP_1>;
+				interconnect-names = "qup-core", "qup-config";
 				status = "disabled";
 			};
 
@@ -792,6 +864,9 @@
 				pinctrl-names = "default";
 				pinctrl-0 = <&qup_uart6_default>;
 				interrupts = <GIC_SPI 353 IRQ_TYPE_LEVEL_HIGH>;
+				interconnects = <&qup_virt MASTER_QUP_CORE_1 &qup_virt SLAVE_QUP_CORE_1>,
+						<&gem_noc MASTER_APPSS_PROC &config_noc SLAVE_QUP_1>;
+				interconnect-names = "qup-core", "qup-config";
 				status = "disabled";
 			};
 
@@ -805,6 +880,11 @@
 				interrupts = <GIC_SPI 354 IRQ_TYPE_LEVEL_HIGH>;
 				#address-cells = <1>;
 				#size-cells = <0>;
+				interconnects = <&qup_virt MASTER_QUP_CORE_1 &qup_virt SLAVE_QUP_CORE_1>,
+						<&gem_noc MASTER_APPSS_PROC &config_noc SLAVE_QUP_1>,
+						<&aggre2_noc MASTER_QUP_1 &mc_virt SLAVE_EBI1>;
+				interconnect-names = "qup-core", "qup-config",
+							"qup-memory";
 				status = "disabled";
 			};
 
@@ -816,6 +896,9 @@
 				pinctrl-names = "default";
 				pinctrl-0 = <&qup_uart7_default>;
 				interrupts = <GIC_SPI 354 IRQ_TYPE_LEVEL_HIGH>;
+				interconnects = <&qup_virt MASTER_QUP_CORE_1 &qup_virt SLAVE_QUP_CORE_1>,
+						<&gem_noc MASTER_APPSS_PROC &config_noc SLAVE_QUP_1>;
+				interconnect-names = "qup-core", "qup-config";
 				status = "disabled";
 			};
 
@@ -829,6 +912,11 @@
 				interrupts = <GIC_SPI 355 IRQ_TYPE_LEVEL_HIGH>;
 				#address-cells = <1>;
 				#size-cells = <0>;
+				interconnects = <&qup_virt MASTER_QUP_CORE_1 &qup_virt SLAVE_QUP_CORE_1>,
+						<&gem_noc MASTER_APPSS_PROC &config_noc SLAVE_QUP_1>,
+						<&aggre2_noc MASTER_QUP_1 &mc_virt SLAVE_EBI1>;
+				interconnect-names = "qup-core", "qup-config",
+							"qup-memory";
 				status = "disabled";
 			};
 
@@ -842,6 +930,9 @@
 				interrupts = <GIC_SPI 355 IRQ_TYPE_LEVEL_HIGH>;
 				#address-cells = <1>;
 				#size-cells = <0>;
+				interconnects = <&qup_virt MASTER_QUP_CORE_1 &qup_virt SLAVE_QUP_CORE_1>,
+						<&gem_noc MASTER_APPSS_PROC &config_noc SLAVE_QUP_1>;
+				interconnect-names = "qup-core", "qup-config";
 				status = "disabled";
 			};
 
@@ -853,6 +944,9 @@
 				pinctrl-names = "default";
 				pinctrl-0 = <&qup_uart8_default>;
 				interrupts = <GIC_SPI 355 IRQ_TYPE_LEVEL_HIGH>;
+				interconnects = <&qup_virt MASTER_QUP_CORE_1 &qup_virt SLAVE_QUP_CORE_1>,
+						<&gem_noc MASTER_APPSS_PROC &config_noc SLAVE_QUP_1>;
+				interconnect-names = "qup-core", "qup-config";
 				status = "disabled";
 			};
 
@@ -866,6 +960,11 @@
 				interrupts = <GIC_SPI 356 IRQ_TYPE_LEVEL_HIGH>;
 				#address-cells = <1>;
 				#size-cells = <0>;
+				interconnects = <&qup_virt MASTER_QUP_CORE_1 &qup_virt SLAVE_QUP_CORE_1>,
+						<&gem_noc MASTER_APPSS_PROC &config_noc SLAVE_QUP_1>,
+						<&aggre2_noc MASTER_QUP_1 &mc_virt SLAVE_EBI1>;
+				interconnect-names = "qup-core", "qup-config",
+							"qup-memory";
 				status = "disabled";
 			};
 
@@ -877,6 +976,9 @@
 				pinctrl-names = "default";
 				pinctrl-0 = <&qup_uart9_default>;
 				interrupts = <GIC_SPI 356 IRQ_TYPE_LEVEL_HIGH>;
+				interconnects = <&qup_virt MASTER_QUP_CORE_1 &qup_virt SLAVE_QUP_CORE_1>,
+						<&gem_noc MASTER_APPSS_PROC &config_noc SLAVE_QUP_1>;
+				interconnect-names = "qup-core", "qup-config";
 				status = "disabled";
 			};
 
@@ -890,6 +992,11 @@
 				interrupts = <GIC_SPI 357 IRQ_TYPE_LEVEL_HIGH>;
 				#address-cells = <1>;
 				#size-cells = <0>;
+				interconnects = <&qup_virt MASTER_QUP_CORE_1 &qup_virt SLAVE_QUP_CORE_1>,
+						<&gem_noc MASTER_APPSS_PROC &config_noc SLAVE_QUP_1>,
+						<&aggre2_noc MASTER_QUP_1 &mc_virt SLAVE_EBI1>;
+				interconnect-names = "qup-core", "qup-config",
+							"qup-memory";
 				status = "disabled";
 			};
 
@@ -903,6 +1010,9 @@
 				interrupts = <GIC_SPI 357 IRQ_TYPE_LEVEL_HIGH>;
 				#address-cells = <1>;
 				#size-cells = <0>;
+				interconnects = <&qup_virt MASTER_QUP_CORE_1 &qup_virt SLAVE_QUP_CORE_1>,
+						<&gem_noc MASTER_APPSS_PROC &config_noc SLAVE_QUP_1>;
+				interconnect-names = "qup-core", "qup-config";
 				status = "disabled";
 			};
 
@@ -914,6 +1024,9 @@
 				pinctrl-names = "default";
 				pinctrl-0 = <&qup_uart10_default>;
 				interrupts = <GIC_SPI 357 IRQ_TYPE_LEVEL_HIGH>;
+				interconnects = <&qup_virt MASTER_QUP_CORE_1 &qup_virt SLAVE_QUP_CORE_1>,
+						<&gem_noc MASTER_APPSS_PROC &config_noc SLAVE_QUP_1>;
+				interconnect-names = "qup-core", "qup-config";
 				status = "disabled";
 			};
 
@@ -927,6 +1040,11 @@
 				interrupts = <GIC_SPI 358 IRQ_TYPE_LEVEL_HIGH>;
 				#address-cells = <1>;
 				#size-cells = <0>;
+				interconnects = <&qup_virt MASTER_QUP_CORE_1 &qup_virt SLAVE_QUP_CORE_1>,
+						<&gem_noc MASTER_APPSS_PROC &config_noc SLAVE_QUP_1>,
+						<&aggre2_noc MASTER_QUP_1 &mc_virt SLAVE_EBI1>;
+				interconnect-names = "qup-core", "qup-config",
+							"qup-memory";
 				status = "disabled";
 			};
 
@@ -940,6 +1058,9 @@
 				interrupts = <GIC_SPI 358 IRQ_TYPE_LEVEL_HIGH>;
 				#address-cells = <1>;
 				#size-cells = <0>;
+				interconnects = <&qup_virt MASTER_QUP_CORE_1 &qup_virt SLAVE_QUP_CORE_1>,
+						<&gem_noc MASTER_APPSS_PROC &config_noc SLAVE_QUP_1>;
+				interconnect-names = "qup-core", "qup-config";
 				status = "disabled";
 			};
 
@@ -951,6 +1072,9 @@
 				pinctrl-names = "default";
 				pinctrl-0 = <&qup_uart11_default>;
 				interrupts = <GIC_SPI 358 IRQ_TYPE_LEVEL_HIGH>;
+				interconnects = <&qup_virt MASTER_QUP_CORE_1 &qup_virt SLAVE_QUP_CORE_1>,
+						<&gem_noc MASTER_APPSS_PROC &config_noc SLAVE_QUP_1>;
+				interconnect-names = "qup-core", "qup-config";
 				status = "disabled";
 			};
 		};
@@ -2132,6 +2256,9 @@
 			clocks = <&gcc GCC_QSPI_CNOC_PERIPH_AHB_CLK>,
 				 <&gcc GCC_QSPI_CORE_CLK>;
 			clock-names = "iface", "core";
+			interconnects = <&gem_noc MASTER_APPSS_PROC
+					&config_noc SLAVE_QSPI_0>;
+			interconnect-names = "qspi-config";
 			status = "disabled";
 		};
 
-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,\na Linux Foundation Collaborative Project

Re: [PATCH V6 5/7] tty: serial: qcom_geni_serial: Add interconnect support

[Greg KH]

On Thu, May 21, 2020 at 01:59:22PM +0530, Akash Asthana wrote:
> Get the interconnect paths for Uart based Serial Engine device
> and vote according to the baud rate requirement of the driver.
> 
> Signed-off-by: Akash Asthana <akashast@codeaurora.org>
> Reviewed-by: Matthias Kaehlcke <mka@chromium.org>
> ---
> Changes in V2:
>  - As per Bjorn's comment, removed se == NULL check from geni_serial_icc_get
>  - As per Bjorn's comment, removed code to set se->icc_path* to NULL in failure
>  - As per Bjorn's comment, introduced and using devm_of_icc_get API for getting
>    path handle
>  - As per Matthias comment, added error handling for icc_set_bw call
> 
> Changes in V3:
>  - As per Matthias comment, use common library APIs defined in geni-se
>    driver for ICC functionality.
> 
> Changes in V4:
>  - As per Mark's comment move peak_bw guess as twice of avg_bw if
>    nothing mentioned explicitly to ICC core.
>  - As per Matthias's comment select core clock BW based on baud rate.
>    If it's less than 115200 go for GENI_DEFAULT_BW else CORE_2X_50_MHZ
> 
> Changes in V5:
>  - Add icc_enable/disable to power on/off call.
>  - Save some non-zero avg/peak value to ICC core by calling geni_icc_set_bw
>    from probe so that when resume/icc_enable is called NOC are running at
>    some non-zero value. No need to call icc_disable after BW vote because
>    console devices are expected to be in active state from the probe itself
>    and qcom_geni_serial_pm(STATE_OFF) will be called for non-console ones.
> 
> Changes in V6:
>  - No change
> 
>  drivers/tty/serial/qcom_geni_serial.c | 31 ++++++++++++++++++++++++++++---
>  1 file changed, 28 insertions(+), 3 deletions(-)

Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Re: [PATCH V6 1/7] soc: qcom: geni: Support for ICC voting

[Matthias Kaehlcke]

Hi Akash,

On Thu, May 21, 2020 at 01:59:18PM +0530, Akash Asthana wrote:
> Add necessary macros and structure variables to support ICC BW
> voting from individual SE drivers.
> 
> Signed-off-by: Akash Asthana <akashast@codeaurora.org>
> Reviewed-by: Matthias Kaehlcke <mka@chromium.org>
> ---
> Changes in V2:
>  - As per Bjorn's comment dropped enums for ICC paths, given the three
>    paths individual members
> 
> Changes in V3:
>  - Add geni_icc_get, geni_icc_vote_on and geni_icc_vote_off as helper API.
>  - Add geni_icc_path structure in common header
> 
> Changes in V4:
>  - As per Bjorn's comment print error message in geni_icc_get if return
>    value is not -EPROBE_DEFER.
>  - As per Bjorn's comment remove NULL on path before calling icc_set_bw
>    API.
>  - As per Bjorn's comment drop __func__ print.
>  - As per Matthias's comment, make ICC path a array instead of individual
>    member entry in geni_se struct.
> 
> Changes in V5:
>  - As per Matthias's comment defined enums for ICC paths.
>  - Integrate icc_enable/disable with power on/off call for driver.
>  - As per Matthias's comment added icc_path_names array to print icc path name
>    in failure case.
>  - As per Georgi's suggestion assume peak_bw = avg_bw if not mentioned.
> 
> Changes in V6:
>  - Addressed nitpicks from Matthias.
> 
> Note: I have ignored below check patch suggestion because it was throwing
>       compilation error as 'icc_ddr' is not compile time comstant.
> 
> WARNING: char * array declaration might be better as static const
>  - FILE: drivers/soc/qcom/qcom-geni-se.c:726:
>  - const char *icc_names[] = {"qup-core", "qup-config", icc_ddr};
> 
>  drivers/soc/qcom/qcom-geni-se.c | 92 +++++++++++++++++++++++++++++++++++++++++
>  include/linux/qcom-geni-se.h    | 42 +++++++++++++++++++
>  2 files changed, 134 insertions(+)
> 
> diff --git a/drivers/soc/qcom/qcom-geni-se.c b/drivers/soc/qcom/qcom-geni-se.c
> index 7d622ea..0b2526d 100644
> --- a/drivers/soc/qcom/qcom-geni-se.c
> +++ b/drivers/soc/qcom/qcom-geni-se.c
> @@ -92,6 +92,9 @@ struct geni_wrapper {
>  	struct clk_bulk_data ahb_clks[NUM_AHB_CLKS];
>  };
>  
> +static const char * const icc_path_names[] = {"qup-core", "qup-config",
> +						"qup-memory"};
> +
>  #define QUP_HW_VER_REG			0x4
>  
>  /* Common SE registers */
> @@ -720,6 +723,95 @@ void geni_se_rx_dma_unprep(struct geni_se *se, dma_addr_t iova, size_t len)
>  }
>  EXPORT_SYMBOL(geni_se_rx_dma_unprep);
>  
> +int geni_icc_get(struct geni_se *se, const char *icc_ddr)
> +{
> +	int i, err;
> +	const char *icc_names[] = {"qup-core", "qup-config", icc_ddr};
> +
> +	for (i = 0; i < ARRAY_SIZE(se->icc_paths); i++) {
> +		if (!icc_names[i])
> +			continue;
> +
> +		se->icc_paths[i].path = devm_of_icc_get(se->dev, icc_names[i]);
> +		if (IS_ERR(se->icc_paths[i].path))
> +			goto err;
> +	}
> +
> +	return 0;
> +
> +err:
> +	err = PTR_ERR(se->icc_paths[i].path);
> +	if (err != -EPROBE_DEFER)
> +		dev_err_ratelimited(se->dev, "Failed to get ICC path:%s :%d\n",

That's still an odd format, especially the colon before the error code. My
suggestion was "... path 'qup-core': 42" i.e. "... path '%s': %d".

I don't want to stall the series on nits though, if there is no need for
a respin for other reasons this can be also fixed with a patch after this
has landed.

I'm still not overly convinced about having two bandwidth values for what
might happen in the future (or not). Typically unused functions or struct
members that are added just in case tend to be rejected, since they can be
added when the need actually arises. Anyway, as long as maintainers are
happy with it I won't object.

Reviewed-by: Matthias Kaehlcke <mka@chromium.org>

Re: [PATCH V6 2/7] soc: qcom-geni-se: Add interconnect support to fix earlycon crash

[Matthias Kaehlcke]

Hi Akash,

On Thu, May 21, 2020 at 01:59:19PM +0530, Akash Asthana wrote:
> QUP core clock is shared among all the SE drivers present on particular
> QUP wrapper, the system will reset(unclocked access) if earlycon used after
> QUP core clock is put to 0 from other SE drivers before real console comes
> up.
> 
> As earlycon can't vote for it's QUP core need, to fix this add ICC
> support to common/QUP wrapper driver and put vote for QUP core from
> probe on behalf of earlycon and remove vote during earlycon exit call.
> 
> Signed-off-by: Akash Asthana <akashast@codeaurora.org>
> Reported-by: Matthias Kaehlcke <mka@chromium.org>
> ---
> Change in V3:
>  - Add geni_remove_earlycon_icc_vote API that will be used by earlycon
>    exit function to remove ICC vote for earlyconsole.
>  - Remove suspend/resume hook for geni-se driver as we are no longer
>    removing earlyconsole ICC vote from system suspend, we are removing
>    from earlycon exit.
> 
> Change in V4:
>  - As per Matthias comment make 'earlycon_wrapper' as static structure.
> 
> Changes in V5:
>  - Vote for core path only after checking whether "qcom_geni" earlycon is
>    actually present or not by traversing over structure "console_drivers".
> 
> Changes in V6:
>  - As per Matthias's comment removed NULL check for console_drivers global
>    struct, added NULL check for earlycon_wrapper in _remove_earlycon_icc_vote
>    API
>  - Addressed nitpicks from Andy.
> 
>  drivers/soc/qcom/qcom-geni-se.c       | 68 +++++++++++++++++++++++++++++++++++
>  drivers/tty/serial/qcom_geni_serial.c |  7 ++++
>  include/linux/qcom-geni-se.h          |  2 ++
>  3 files changed, 77 insertions(+)
> 
> diff --git a/drivers/soc/qcom/qcom-geni-se.c b/drivers/soc/qcom/qcom-geni-se.c
> index 0b2526d..ac16bb1 100644
> --- a/drivers/soc/qcom/qcom-geni-se.c
> +++ b/drivers/soc/qcom/qcom-geni-se.c
> @@ -3,6 +3,7 @@
>  
>  #include <linux/acpi.h>
>  #include <linux/clk.h>
> +#include <linux/console.h>
>  #include <linux/slab.h>
>  #include <linux/dma-mapping.h>
>  #include <linux/io.h>
> @@ -90,11 +91,14 @@ struct geni_wrapper {
>  	struct device *dev;
>  	void __iomem *base;
>  	struct clk_bulk_data ahb_clks[NUM_AHB_CLKS];
> +	struct geni_icc_path to_core;
>  };
>  
>  static const char * const icc_path_names[] = {"qup-core", "qup-config",
>  						"qup-memory"};
>  
> +static struct geni_wrapper *earlycon_wrapper;
> +
>  #define QUP_HW_VER_REG			0x4
>  
>  /* Common SE registers */
> @@ -812,11 +816,38 @@ int geni_icc_disable(struct geni_se *se)
>  }
>  EXPORT_SYMBOL(geni_icc_disable);
>  
> +void geni_remove_earlycon_icc_vote(void)
> +{
> +	struct geni_wrapper *wrapper;
> +	struct device_node *parent;
> +	struct device_node *child;
> +
> +	if (!earlycon_wrapper)
> +		return;
> +
> +	wrapper = earlycon_wrapper;
> +	parent = of_get_next_parent(wrapper->dev->of_node);
> +	for_each_child_of_node(parent, child) {
> +		if (!of_device_is_compatible(child, "qcom,geni-se-qup"))
> +			continue;
> +		wrapper = platform_get_drvdata(of_find_device_by_node(child));
> +		icc_put(wrapper->to_core.path);
> +		wrapper->to_core.path = NULL;
> +
> +	}
> +	of_node_put(parent);
> +
> +	earlycon_wrapper = NULL;
> +}
> +EXPORT_SYMBOL(geni_remove_earlycon_icc_vote);
> +
>  static int geni_se_probe(struct platform_device *pdev)
>  {
>  	struct device *dev = &pdev->dev;
>  	struct resource *res;
>  	struct geni_wrapper *wrapper;
> +	struct console __maybe_unused *bcon;
> +	bool __maybe_unused has_earlycon = false;
>  	int ret;
>  
>  	wrapper = devm_kzalloc(dev, sizeof(*wrapper), GFP_KERNEL);
> @@ -839,6 +870,43 @@ static int geni_se_probe(struct platform_device *pdev)
>  		}
>  	}
>  
> +#ifdef CONFIG_SERIAL_EARLYCON
> +	for_each_console(bcon) {
> +		if (!strcmp(bcon->name, "qcom_geni")) {
> +			has_earlycon = true;
> +			break;
> +		}
> +	}
> +	if (!has_earlycon)
> +		goto exit;
> +
> +	wrapper->to_core.path = devm_of_icc_get(dev, "qup-core");
> +	if (IS_ERR(wrapper->to_core.path))
> +		return PTR_ERR(wrapper->to_core.path);
> +	/*
> +	 * Put minmal BW request on core clocks on behalf of early console.
> +	 * The vote will be removed earlycon exit function.
> +	 *
> +	 * Note: We are putting vote on each QUP wrapper instead only to which
> +	 * earlycon is connected because QUP core clock of different wrapper
> +	 * share same voltage domain. If core1 is put to 0, then core2 will
> +	 * also run at 0, if not voted. Default ICC vote will be removed ASA
> +	 * we touch any of the core clock.
> +	 * core1 = core2 = max(core1, core2)
> +	 */
> +	ret = icc_set_bw(wrapper->to_core.path, GENI_DEFAULT_BW,
> +				GENI_DEFAULT_BW);
> +	if (ret) {
> +		dev_err(&pdev->dev, "%s: ICC BW voting failed for core :%d\n",

nit: " ... core: %d\n".

Reviewed-by: Matthias Kaehlcke <mka@chromium.org>

Re: [PATCH V6 2/7] soc: qcom-geni-se: Add interconnect support to fix earlycon crash

[Matthias Kaehlcke]

Hi Akash,

On Thu, May 21, 2020 at 01:59:19PM +0530, Akash Asthana wrote:
> QUP core clock is shared among all the SE drivers present on particular
> QUP wrapper, the system will reset(unclocked access) if earlycon used after
> QUP core clock is put to 0 from other SE drivers before real console comes
> up.
> 
> As earlycon can't vote for it's QUP core need, to fix this add ICC
> support to common/QUP wrapper driver and put vote for QUP core from
> probe on behalf of earlycon and remove vote during earlycon exit call.
> 
> Signed-off-by: Akash Asthana <akashast@codeaurora.org>
> Reported-by: Matthias Kaehlcke <mka@chromium.org>
> ---
> Change in V3:
>  - Add geni_remove_earlycon_icc_vote API that will be used by earlycon
>    exit function to remove ICC vote for earlyconsole.
>  - Remove suspend/resume hook for geni-se driver as we are no longer
>    removing earlyconsole ICC vote from system suspend, we are removing
>    from earlycon exit.
> 
> Change in V4:
>  - As per Matthias comment make 'earlycon_wrapper' as static structure.
> 
> Changes in V5:
>  - Vote for core path only after checking whether "qcom_geni" earlycon is
>    actually present or not by traversing over structure "console_drivers".
> 
> Changes in V6:
>  - As per Matthias's comment removed NULL check for console_drivers global
>    struct, added NULL check for earlycon_wrapper in _remove_earlycon_icc_vote
>    API
>  - Addressed nitpicks from Andy.
> 
>  drivers/soc/qcom/qcom-geni-se.c       | 68 +++++++++++++++++++++++++++++++++++
>  drivers/tty/serial/qcom_geni_serial.c |  7 ++++
>  include/linux/qcom-geni-se.h          |  2 ++
>  3 files changed, 77 insertions(+)
> 
> diff --git a/drivers/soc/qcom/qcom-geni-se.c b/drivers/soc/qcom/qcom-geni-se.c
> index 0b2526d..ac16bb1 100644
> --- a/drivers/soc/qcom/qcom-geni-se.c
> +++ b/drivers/soc/qcom/qcom-geni-se.c
> @@ -3,6 +3,7 @@
>  
>  #include <linux/acpi.h>
>  #include <linux/clk.h>
> +#include <linux/console.h>
>  #include <linux/slab.h>
>  #include <linux/dma-mapping.h>
>  #include <linux/io.h>
> @@ -90,11 +91,14 @@ struct geni_wrapper {
>  	struct device *dev;
>  	void __iomem *base;
>  	struct clk_bulk_data ahb_clks[NUM_AHB_CLKS];
> +	struct geni_icc_path to_core;
>  };
>  
>  static const char * const icc_path_names[] = {"qup-core", "qup-config",
>  						"qup-memory"};
>  
> +static struct geni_wrapper *earlycon_wrapper;
> +
>  #define QUP_HW_VER_REG			0x4
>  
>  /* Common SE registers */
> @@ -812,11 +816,38 @@ int geni_icc_disable(struct geni_se *se)
>  }
>  EXPORT_SYMBOL(geni_icc_disable);
>  
> +void geni_remove_earlycon_icc_vote(void)
> +{
> +	struct geni_wrapper *wrapper;
> +	struct device_node *parent;
> +	struct device_node *child;
> +
> +	if (!earlycon_wrapper)
> +		return;
> +
> +	wrapper = earlycon_wrapper;
> +	parent = of_get_next_parent(wrapper->dev->of_node);
> +	for_each_child_of_node(parent, child) {
> +		if (!of_device_is_compatible(child, "qcom,geni-se-qup"))
> +			continue;
> +		wrapper = platform_get_drvdata(of_find_device_by_node(child));
> +		icc_put(wrapper->to_core.path);
> +		wrapper->to_core.path = NULL;
> +
> +	}
> +	of_node_put(parent);
> +
> +	earlycon_wrapper = NULL;
> +}
> +EXPORT_SYMBOL(geni_remove_earlycon_icc_vote);
> +
>  static int geni_se_probe(struct platform_device *pdev)
>  {
>  	struct device *dev = &pdev->dev;
>  	struct resource *res;
>  	struct geni_wrapper *wrapper;
> +	struct console __maybe_unused *bcon;
> +	bool __maybe_unused has_earlycon = false;
>  	int ret;
>  
>  	wrapper = devm_kzalloc(dev, sizeof(*wrapper), GFP_KERNEL);
> @@ -839,6 +870,43 @@ static int geni_se_probe(struct platform_device *pdev)
>  		}
>  	}
>  
> +#ifdef CONFIG_SERIAL_EARLYCON
> +	for_each_console(bcon) {
> +		if (!strcmp(bcon->name, "qcom_geni")) {
> +			has_earlycon = true;
> +			break;
> +		}
> +	}
> +	if (!has_earlycon)
> +		goto exit;
> +
> +	wrapper->to_core.path = devm_of_icc_get(dev, "qup-core");
> +	if (IS_ERR(wrapper->to_core.path))
> +		return PTR_ERR(wrapper->to_core.path);
> +	/*
> +	 * Put minmal BW request on core clocks on behalf of early console.
> +	 * The vote will be removed earlycon exit function.
> +	 *
> +	 * Note: We are putting vote on each QUP wrapper instead only to which
> +	 * earlycon is connected because QUP core clock of different wrapper
> +	 * share same voltage domain. If core1 is put to 0, then core2 will
> +	 * also run at 0, if not voted. Default ICC vote will be removed ASA
> +	 * we touch any of the core clock.
> +	 * core1 = core2 = max(core1, core2)
> +	 */
> +	ret = icc_set_bw(wrapper->to_core.path, GENI_DEFAULT_BW,
> +				GENI_DEFAULT_BW);
> +	if (ret) {
> +		dev_err(&pdev->dev, "%s: ICC BW voting failed for core :%d\n",

should be "... core: %d"

same for the other instances. I don't necessarily want to stall the series on
this, it can also be addressed with a follow up patch. Up to you if you want
to respin or not.

Reviewed-by: Matthias Kaehlcke <mka@chromium.org>

Re: [PATCH V6 2/7] soc: qcom-geni-se: Add interconnect support to fix earlycon crash

[kbuild test robot]

[-- Attachment #1: Type: text/plain, Size: 4422 bytes --]

Hi Akash,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on tty/tty-testing]
[also build test ERROR on spi/for-next wsa/i2c/for-next usb/usb-testing driver-core/driver-core-testing linus/master v5.7-rc6]
[cannot apply to next-20200522]
[if your patch is applied to the wrong git tree, please drop us a note to help
improve the system. BTW, we also suggest to use '--base' option to specify the
base tree in git format-patch, please see https://stackoverflow.com/a/37406982]

url:    https://github.com/0day-ci/linux/commits/Akash-Asthana/Add-interconnect-support-to-QSPI-and-QUP-drivers/20200521-163523
base:   https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty.git tty-testing
config: x86_64-randconfig-r023-20200521 (attached as .config)
compiler: clang version 11.0.0 (https://github.com/llvm/llvm-project 3393cc4cebf9969db94dc424b7a2b6195589c33b)
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # install x86_64 cross compiling tool for clang build
        # apt-get install binutils-x86-64-linux-gnu
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kbuild test robot <lkp@intel.com>

All error/warnings (new ones prefixed by >>, old ones prefixed by <<):

drivers/soc/qcom/qcom-geni-se.c:739:27: error: implicit declaration of function 'devm_of_icc_get' [-Werror,-Wimplicit-function-declaration]
se->icc_paths[i].path = devm_of_icc_get(se->dev, icc_names[i]);
^
drivers/soc/qcom/qcom-geni-se.c:739:27: note: did you mean 'of_icc_get'?
include/linux/interconnect.h:30:18: note: 'of_icc_get' declared here
struct icc_path *of_icc_get(struct device *dev, const char *name);
^
drivers/soc/qcom/qcom-geni-se.c:739:25: warning: incompatible integer to pointer conversion assigning to 'struct icc_path *' from 'int' [-Wint-conversion]
se->icc_paths[i].path = devm_of_icc_get(se->dev, icc_names[i]);
^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/soc/qcom/qcom-geni-se.c:790:9: error: implicit declaration of function 'icc_enable' [-Werror,-Wimplicit-function-declaration]
ret = icc_enable(se->icc_paths[i].path);
^
drivers/soc/qcom/qcom-geni-se.c:807:9: error: implicit declaration of function 'icc_disable' [-Werror,-Wimplicit-function-declaration]
ret = icc_disable(se->icc_paths[i].path);
^
>> drivers/soc/qcom/qcom-geni-se.c:829:11: error: implicit declaration of function 'of_get_next_parent' [-Werror,-Wimplicit-function-declaration]
parent = of_get_next_parent(wrapper->dev->of_node);
^
>> drivers/soc/qcom/qcom-geni-se.c:829:9: warning: incompatible integer to pointer conversion assigning to 'struct device_node *' from 'int' [-Wint-conversion]
parent = of_get_next_parent(wrapper->dev->of_node);
^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/soc/qcom/qcom-geni-se.c:883:26: error: implicit declaration of function 'devm_of_icc_get' [-Werror,-Wimplicit-function-declaration]
wrapper->to_core.path = devm_of_icc_get(dev, "qup-core");
^
drivers/soc/qcom/qcom-geni-se.c:883:24: warning: incompatible integer to pointer conversion assigning to 'struct icc_path *' from 'int' [-Wint-conversion]
wrapper->to_core.path = devm_of_icc_get(dev, "qup-core");
^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
3 warnings and 5 errors generated.

vim +/of_get_next_parent +829 drivers/soc/qcom/qcom-geni-se.c

   818	
   819	void geni_remove_earlycon_icc_vote(void)
   820	{
   821		struct geni_wrapper *wrapper;
   822		struct device_node *parent;
   823		struct device_node *child;
   824	
   825		if (!earlycon_wrapper)
   826			return;
   827	
   828		wrapper = earlycon_wrapper;
 > 829		parent = of_get_next_parent(wrapper->dev->of_node);
   830		for_each_child_of_node(parent, child) {
   831			if (!of_device_is_compatible(child, "qcom,geni-se-qup"))
   832				continue;
   833			wrapper = platform_get_drvdata(of_find_device_by_node(child));
   834			icc_put(wrapper->to_core.path);
   835			wrapper->to_core.path = NULL;
   836	
   837		}
   838		of_node_put(parent);
   839	
   840		earlycon_wrapper = NULL;
   841	}
   842	EXPORT_SYMBOL(geni_remove_earlycon_icc_vote);
   843	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

[-- Attachment #2: .config.gz --]
[-- Type: application/gzip, Size: 35395 bytes --]

Re: [PATCH V6 6/7] spi: spi-qcom-qspi: Add interconnect support

[kbuild test robot]

[-- Attachment #1: Type: text/plain, Size: 7646 bytes --]

Hi Akash,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on tty/tty-testing]
[also build test ERROR on spi/for-next wsa/i2c/for-next usb/usb-testing driver-core/driver-core-testing linus/master v5.7-rc6]
[cannot apply to next-20200522]
[if your patch is applied to the wrong git tree, please drop us a note to help
improve the system. BTW, we also suggest to use '--base' option to specify the
base tree in git format-patch, please see https://stackoverflow.com/a/37406982]

url:    https://github.com/0day-ci/linux/commits/Akash-Asthana/Add-interconnect-support-to-QSPI-and-QUP-drivers/20200521-163523
base:   https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty.git tty-testing
config: arm64-randconfig-r026-20200521 (attached as .config)
compiler: clang version 11.0.0 (https://github.com/llvm/llvm-project 3393cc4cebf9969db94dc424b7a2b6195589c33b)
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # install arm64 cross compiling tool for clang build
        # apt-get install binutils-aarch64-linux-gnu
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=arm64 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kbuild test robot <lkp@intel.com>

All error/warnings (new ones prefixed by >>, old ones prefixed by <<):

>> drivers/spi/spi-qcom-qspi.c:479:31: error: implicit declaration of function 'devm_of_icc_get' [-Werror,-Wimplicit-function-declaration]
ctrl->icc_path_cpu_to_qspi = devm_of_icc_get(dev, "qspi-config");
^
>> drivers/spi/spi-qcom-qspi.c:479:29: warning: incompatible integer to pointer conversion assigning to 'struct icc_path *' from 'int' [-Wint-conversion]
ctrl->icc_path_cpu_to_qspi = devm_of_icc_get(dev, "qspi-config");
^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> drivers/spi/spi-qcom-qspi.c:495:8: error: implicit declaration of function 'icc_disable' [-Werror,-Wimplicit-function-declaration]
ret = icc_disable(ctrl->icc_path_cpu_to_qspi);
^
drivers/spi/spi-qcom-qspi.c:495:8: note: did you mean 'clk_disable'?
include/linux/clk.h:519:6: note: 'clk_disable' declared here
void clk_disable(struct clk *clk);
^
drivers/spi/spi-qcom-qspi.c:559:8: error: implicit declaration of function 'icc_disable' [-Werror,-Wimplicit-function-declaration]
ret = icc_disable(ctrl->icc_path_cpu_to_qspi);
^
>> drivers/spi/spi-qcom-qspi.c:575:8: error: implicit declaration of function 'icc_enable' [-Werror,-Wimplicit-function-declaration]
ret = icc_enable(ctrl->icc_path_cpu_to_qspi);
^
drivers/spi/spi-qcom-qspi.c:575:8: note: did you mean 'clk_enable'?
include/linux/clk.h:491:5: note: 'clk_enable' declared here
int clk_enable(struct clk *clk);
^
1 warning and 4 errors generated.

vim +/devm_of_icc_get +479 drivers/spi/spi-qcom-qspi.c

   440	
   441	static int qcom_qspi_probe(struct platform_device *pdev)
   442	{
   443		int ret;
   444		struct device *dev;
   445		struct spi_master *master;
   446		struct qcom_qspi *ctrl;
   447	
   448		dev = &pdev->dev;
   449	
   450		master = spi_alloc_master(dev, sizeof(*ctrl));
   451		if (!master)
   452			return -ENOMEM;
   453	
   454		platform_set_drvdata(pdev, master);
   455	
   456		ctrl = spi_master_get_devdata(master);
   457	
   458		spin_lock_init(&ctrl->lock);
   459		ctrl->dev = dev;
   460		ctrl->base = devm_platform_ioremap_resource(pdev, 0);
   461		if (IS_ERR(ctrl->base)) {
   462			ret = PTR_ERR(ctrl->base);
   463			goto exit_probe_master_put;
   464		}
   465	
   466		ctrl->clks = devm_kcalloc(dev, QSPI_NUM_CLKS,
   467					  sizeof(*ctrl->clks), GFP_KERNEL);
   468		if (!ctrl->clks) {
   469			ret = -ENOMEM;
   470			goto exit_probe_master_put;
   471		}
   472	
   473		ctrl->clks[QSPI_CLK_CORE].id = "core";
   474		ctrl->clks[QSPI_CLK_IFACE].id = "iface";
   475		ret = devm_clk_bulk_get(dev, QSPI_NUM_CLKS, ctrl->clks);
   476		if (ret)
   477			goto exit_probe_master_put;
   478	
 > 479		ctrl->icc_path_cpu_to_qspi = devm_of_icc_get(dev, "qspi-config");
   480		if (IS_ERR(ctrl->icc_path_cpu_to_qspi)) {
   481			ret = PTR_ERR(ctrl->icc_path_cpu_to_qspi);
   482			if (ret != -EPROBE_DEFER)
   483				dev_err(dev, "Failed to get cpu path :%d\n", ret);
   484			goto exit_probe_master_put;
   485		}
   486		/* Set BW vote for register access */
   487		ret = icc_set_bw(ctrl->icc_path_cpu_to_qspi, Bps_to_icc(1000),
   488					Bps_to_icc(1000));
   489		if (ret) {
   490			dev_err(ctrl->dev, "%s: ICC BW voting failed for cpu :%d\n",
   491					__func__, ret);
   492			goto exit_probe_master_put;
   493		}
   494	
 > 495		ret = icc_disable(ctrl->icc_path_cpu_to_qspi);
   496		if (ret) {
   497			dev_err(ctrl->dev, "%s: ICC disable failed for cpu :%d\n",
   498					__func__, ret);
   499			goto exit_probe_master_put;
   500		}
   501	
   502		ret = platform_get_irq(pdev, 0);
   503		if (ret < 0)
   504			goto exit_probe_master_put;
   505		ret = devm_request_irq(dev, ret, qcom_qspi_irq,
   506				IRQF_TRIGGER_HIGH, dev_name(dev), ctrl);
   507		if (ret) {
   508			dev_err(dev, "Failed to request irq %d\n", ret);
   509			goto exit_probe_master_put;
   510		}
   511	
   512		master->max_speed_hz = 300000000;
   513		master->num_chipselect = QSPI_NUM_CS;
   514		master->bus_num = -1;
   515		master->dev.of_node = pdev->dev.of_node;
   516		master->mode_bits = SPI_MODE_0 |
   517				    SPI_TX_DUAL | SPI_RX_DUAL |
   518				    SPI_TX_QUAD | SPI_RX_QUAD;
   519		master->flags = SPI_MASTER_HALF_DUPLEX;
   520		master->prepare_message = qcom_qspi_prepare_message;
   521		master->transfer_one = qcom_qspi_transfer_one;
   522		master->handle_err = qcom_qspi_handle_err;
   523		master->auto_runtime_pm = true;
   524	
   525		pm_runtime_enable(dev);
   526	
   527		ret = spi_register_master(master);
   528		if (!ret)
   529			return 0;
   530	
   531		pm_runtime_disable(dev);
   532	
   533	exit_probe_master_put:
   534		spi_master_put(master);
   535	
   536		return ret;
   537	}
   538	
   539	static int qcom_qspi_remove(struct platform_device *pdev)
   540	{
   541		struct spi_master *master = platform_get_drvdata(pdev);
   542	
   543		/* Unregister _before_ disabling pm_runtime() so we stop transfers */
   544		spi_unregister_master(master);
   545	
   546		pm_runtime_disable(&pdev->dev);
   547	
   548		return 0;
   549	}
   550	
   551	static int __maybe_unused qcom_qspi_runtime_suspend(struct device *dev)
   552	{
   553		struct spi_master *master = dev_get_drvdata(dev);
   554		struct qcom_qspi *ctrl = spi_master_get_devdata(master);
   555		int ret;
   556	
   557		clk_bulk_disable_unprepare(QSPI_NUM_CLKS, ctrl->clks);
   558	
   559		ret = icc_disable(ctrl->icc_path_cpu_to_qspi);
   560		if (ret) {
   561			dev_err_ratelimited(ctrl->dev, "%s: ICC disable failed for cpu :%d\n",
   562				__func__, ret);
   563			return ret;
   564		}
   565	
   566		return 0;
   567	}
   568	
   569	static int __maybe_unused qcom_qspi_runtime_resume(struct device *dev)
   570	{
   571		struct spi_master *master = dev_get_drvdata(dev);
   572		struct qcom_qspi *ctrl = spi_master_get_devdata(master);
   573		int ret;
   574	
 > 575		ret = icc_enable(ctrl->icc_path_cpu_to_qspi);
   576		if (ret) {
   577			dev_err_ratelimited(ctrl->dev, "%s: ICC enable failed for cpu :%d\n",
   578				__func__, ret);
   579			return ret;
   580		}
   581	
   582		return clk_bulk_prepare_enable(QSPI_NUM_CLKS, ctrl->clks);
   583	}
   584	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

[-- Attachment #2: .config.gz --]
[-- Type: application/gzip, Size: 42362 bytes --]

Re: [PATCH V6 7/7] arm64: dts: sc7180: Add interconnect for QUP and QSPI

[kbuild test robot]

[-- Attachment #1: Type: text/plain, Size: 1711 bytes --]

Hi Akash,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on tty/tty-testing]
[also build test ERROR on spi/for-next wsa/i2c/for-next usb/usb-testing driver-core/driver-core-testing linus/master v5.7-rc6]
[cannot apply to next-20200522]
[if your patch is applied to the wrong git tree, please drop us a note to help
improve the system. BTW, we also suggest to use '--base' option to specify the
base tree in git format-patch, please see https://stackoverflow.com/a/37406982]

url:    https://github.com/0day-ci/linux/commits/Akash-Asthana/Add-interconnect-support-to-QSPI-and-QUP-drivers/20200521-163523
base:   https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty.git tty-testing
config: arm64-randconfig-r026-20200521 (attached as .config)
compiler: clang version 11.0.0 (https://github.com/llvm/llvm-project 3393cc4cebf9969db94dc424b7a2b6195589c33b)
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # install arm64 cross compiling tool for clang build
        # apt-get install binutils-aarch64-linux-gnu
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=arm64 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kbuild test robot <lkp@intel.com>

All errors (new ones prefixed by >>, old ones prefixed by <<):

>> Error: arch/arm64/boot/dts/qcom/sc7180.dtsi:430.31-32 syntax error
>> FATAL ERROR: Unable to parse input tree

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

[-- Attachment #2: .config.gz --]
[-- Type: application/gzip, Size: 42362 bytes --]

Re: [PATCH V6 1/7] soc: qcom: geni: Support for ICC voting

[Akash Asthana]

Hi Matthias,

On 5/21/2020 9:20 PM, Matthias Kaehlcke wrote:
> Hi Akash,
>
> On Thu, May 21, 2020 at 01:59:18PM +0530, Akash Asthana wrote:
>> Add necessary macros and structure variables to support ICC BW
>> voting from individual SE drivers.
>>
>> Signed-off-by: Akash Asthana <akashast@codeaurora.org>
>> Reviewed-by: Matthias Kaehlcke <mka@chromium.org>
>> ---
>> Changes in V2:
>>   - As per Bjorn's comment dropped enums for ICC paths, given the three
>>     paths individual members
>>
>> Changes in V3:
>>   - Add geni_icc_get, geni_icc_vote_on and geni_icc_vote_off as helper API.
>>   - Add geni_icc_path structure in common header
>>
>> Changes in V4:
>>   - As per Bjorn's comment print error message in geni_icc_get if return
>>     value is not -EPROBE_DEFER.
>>   - As per Bjorn's comment remove NULL on path before calling icc_set_bw
>>     API.
>>   - As per Bjorn's comment drop __func__ print.
>>   - As per Matthias's comment, make ICC path a array instead of individual
>>     member entry in geni_se struct.
>>
>> Changes in V5:
>>   - As per Matthias's comment defined enums for ICC paths.
>>   - Integrate icc_enable/disable with power on/off call for driver.
>>   - As per Matthias's comment added icc_path_names array to print icc path name
>>     in failure case.
>>   - As per Georgi's suggestion assume peak_bw = avg_bw if not mentioned.
>>
>> Changes in V6:
>>   - Addressed nitpicks from Matthias.
>>
>> Note: I have ignored below check patch suggestion because it was throwing
>>        compilation error as 'icc_ddr' is not compile time comstant.
>>
>> WARNING: char * array declaration might be better as static const
>>   - FILE: drivers/soc/qcom/qcom-geni-se.c:726:
>>   - const char *icc_names[] = {"qup-core", "qup-config", icc_ddr};
>>
>>   drivers/soc/qcom/qcom-geni-se.c | 92 +++++++++++++++++++++++++++++++++++++++++
>>   include/linux/qcom-geni-se.h    | 42 +++++++++++++++++++
>>   2 files changed, 134 insertions(+)
>>
>> diff --git a/drivers/soc/qcom/qcom-geni-se.c b/drivers/soc/qcom/qcom-geni-se.c
>> index 7d622ea..0b2526d 100644
>> --- a/drivers/soc/qcom/qcom-geni-se.c
>> +++ b/drivers/soc/qcom/qcom-geni-se.c
>> @@ -92,6 +92,9 @@ struct geni_wrapper {
>>   	struct clk_bulk_data ahb_clks[NUM_AHB_CLKS];
>>   };
>>   
>> +static const char * const icc_path_names[] = {"qup-core", "qup-config",
>> +						"qup-memory"};
>> +
>>   #define QUP_HW_VER_REG			0x4
>>   
>>   /* Common SE registers */
>> @@ -720,6 +723,95 @@ void geni_se_rx_dma_unprep(struct geni_se *se, dma_addr_t iova, size_t len)
>>   }
>>   EXPORT_SYMBOL(geni_se_rx_dma_unprep);
>>   
>> +int geni_icc_get(struct geni_se *se, const char *icc_ddr)
>> +{
>> +	int i, err;
>> +	const char *icc_names[] = {"qup-core", "qup-config", icc_ddr};
>> +
>> +	for (i = 0; i < ARRAY_SIZE(se->icc_paths); i++) {
>> +		if (!icc_names[i])
>> +			continue;
>> +
>> +		se->icc_paths[i].path = devm_of_icc_get(se->dev, icc_names[i]);
>> +		if (IS_ERR(se->icc_paths[i].path))
>> +			goto err;
>> +	}
>> +
>> +	return 0;
>> +
>> +err:
>> +	err = PTR_ERR(se->icc_paths[i].path);
>> +	if (err != -EPROBE_DEFER)
>> +		dev_err_ratelimited(se->dev, "Failed to get ICC path:%s :%d\n",
> That's still an odd format, especially the colon before the error code. My
> suggestion was "... path 'qup-core': 42" i.e. "... path '%s': %d".
Sorry about it, I will correct this everywhere.
> I don't want to stall the series on nits though, if there is no need for
> a respin for other reasons this can be also fixed with a patch after this
> has landed.
>
> I'm still not overly convinced about having two bandwidth values for what
> might happen in the future (or not). Typically unused functions or struct
> members that are added just in case tend to be rejected, since they can be
> added when the need actually arises. Anyway, as long as maintainers are
> happy with it I won't object.

Okay, I am removing peak_bw variable and tracking BW request just with 
avg_bw, if need I will add this back in future.

Thanks for reviewing

regards,

Akash


>
> Reviewed-by: Matthias Kaehlcke <mka@chromium.org>
>
>
>
>
-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,\na Linux Foundation Collaborative Project