| Message ID | 1586946198-13912-6-git-send-email-akashast@codeaurora.org |
|---|---|
| State | Superseded |
| Headers | show |
| Series | Add interconnect support to QSPI and QUP drivers | expand |
Hi Akash, On Wed, Apr 15, 2020 at 03:53:14PM +0530, Akash Asthana wrote: > 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> > --- > 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. > > drivers/i2c/busses/i2c-qcom-geni.c | 26 +++++++++++++++++++++++++- > 1 file changed, 25 insertions(+), 1 deletion(-) > > diff --git a/drivers/i2c/busses/i2c-qcom-geni.c b/drivers/i2c/busses/i2c-qcom-geni.c > index 18d1e4f..7bf830a 100644 > --- a/drivers/i2c/busses/i2c-qcom-geni.c > +++ b/drivers/i2c/busses/i2c-qcom-geni.c > @@ -557,6 +557,22 @@ 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. > + */ > + gi2c->se.icc_paths[0].avg_bw = GENI_DEFAULT_BW; > + gi2c->se.icc_paths[1].avg_bw = GENI_DEFAULT_BW; > + gi2c->se.icc_paths[2].avg_bw = Bps_to_icc(gi2c->clk_freq_out); As commented on patch "soc: qcom: geni: Support for ICC voting" the use of literals to index the paths isn't very clear, please use enums.
diff --git a/drivers/i2c/busses/i2c-qcom-geni.c b/drivers/i2c/busses/i2c-qcom-geni.c index 18d1e4f..7bf830a 100644 --- a/drivers/i2c/busses/i2c-qcom-geni.c +++ b/drivers/i2c/busses/i2c-qcom-geni.c @@ -557,6 +557,22 @@ 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. + */ + gi2c->se.icc_paths[0].avg_bw = GENI_DEFAULT_BW; + gi2c->se.icc_paths[1].avg_bw = GENI_DEFAULT_BW; + gi2c->se.icc_paths[2].avg_bw = Bps_to_icc(gi2c->clk_freq_out); + + ret = geni_icc_vote_on(&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 +595,10 @@ static int geni_i2c_probe(struct platform_device *pdev) return ret; } + ret = geni_icc_vote_off(&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 +643,7 @@ static int __maybe_unused geni_i2c_runtime_suspend(struct device *dev) gi2c->suspended = 1; } - return 0; + return geni_icc_vote_off(&gi2c->se); } static int __maybe_unused geni_i2c_runtime_resume(struct device *dev) @@ -631,6 +651,10 @@ 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_vote_on(&gi2c->se); + if (ret) + return ret; + ret = geni_se_resources_on(&gi2c->se); if (ret) return ret;
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> --- 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. drivers/i2c/busses/i2c-qcom-geni.c | 26 +++++++++++++++++++++++++- 1 file changed, 25 insertions(+), 1 deletion(-)