Add trace event definitions for the Qualcomm GENI (Generic Interface) I2C driver. These trace events enable runtime debugging and performance analysis of I2C operations.
The trace events capture I2C clock configuration, interrupt status and error code and message. Signed-off-by: Praveen Talari <[email protected]> --- drivers/i2c/busses/i2c-qcom-geni.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/drivers/i2c/busses/i2c-qcom-geni.c b/drivers/i2c/busses/i2c-qcom-geni.c index 96dbf04138be..3227fab6d76e 100644 --- a/drivers/i2c/busses/i2c-qcom-geni.c +++ b/drivers/i2c/busses/i2c-qcom-geni.c @@ -1,6 +1,9 @@ // SPDX-License-Identifier: GPL-2.0 // Copyright (c) 2017-2018, The Linux Foundation. All rights reserved. +#define CREATE_TRACE_POINTS +#include <trace/events/qcom_geni_i2c.h> + #include <linux/acpi.h> #include <linux/clk.h> #include <linux/dmaengine.h> @@ -219,6 +222,9 @@ static int qcom_geni_i2c_conf(struct geni_se *se, unsigned long freq) val |= itr->t_low_cnt << LOW_COUNTER_SHFT; val |= itr->t_cycle_cnt; writel_relaxed(val, gi2c->se.base + SE_I2C_SCL_COUNTERS); + trace_geni_i2c_bus_setup(gi2c->se.dev, gi2c->clk_freq_out, + itr->clk_div, itr->t_high_cnt, + itr->t_low_cnt, itr->t_cycle_cnt); return 0; } @@ -252,6 +258,8 @@ static void geni_i2c_err(struct geni_i2c_dev *gi2c, int err) dev_dbg(gi2c->se.dev, "len:%d, slv-addr:0x%x, RD/WR:%d\n", gi2c->cur->len, gi2c->cur->addr, gi2c->cur->flags); + trace_geni_i2c_err(gi2c->se.dev, gi2c_log[err].err, gi2c_log[err].msg); + switch (err) { case GENI_ABORT_DONE: gi2c->abort_done = true; @@ -288,6 +296,8 @@ static irqreturn_t geni_i2c_irq(int irq, void *dev) dma = readl_relaxed(base + SE_GENI_DMA_MODE_EN); cur = gi2c->cur; + trace_geni_i2c_irq(gi2c->se.dev, m_stat, rx_st, dm_tx_st, dm_rx_st); + if (!cur || m_stat & (M_CMD_FAILURE_EN | M_CMD_ABORT_EN) || dm_rx_st & (DM_I2C_CB_ERR)) { @@ -788,6 +798,10 @@ static int geni_i2c_gpi_xfer(struct geni_i2c_dev *gi2c, struct i2c_msg msgs[], i peripheral.set_config = 1; peripheral.multi_msg = false; + trace_geni_i2c_bus_setup(gi2c->se.dev, gi2c->clk_freq_out, + itr->clk_div, itr->t_high_cnt, + itr->t_low_cnt, itr->t_cycle_cnt); + gi2c->num_msgs = num; gi2c->is_tx_multi_desc_xfer = false; @@ -895,6 +909,7 @@ static int geni_i2c_fifo_xfer(struct geni_i2c_dev *gi2c, m_param |= ((msgs[i].addr << SLV_ADDR_SHFT) & SLV_ADDR_MSK); gi2c->cur = &msgs[i]; + if (msgs[i].flags & I2C_M_RD) ret = geni_i2c_rx_one_msg(gi2c, &msgs[i], m_param); else -- 2.34.1
