From bf225ed357c65e788a2996955ef0c78dc015d844 Mon Sep 17 00:00:00 2001 From: Akash Asthana Date: Tue, 23 Jun 2020 16:08:52 +0530 Subject: i2c: i2c-qcom-geni: Add interconnect support 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 Reviewed-by: Matthias Kaehlcke Acked-by: Wolfram Sang Link: https://lore.kernel.org/r/1592908737-7068-4-git-send-email-akashast@codeaurora.org Signed-off-by: Bjorn Andersson --- drivers/i2c/busses/i2c-qcom-geni.c | 26 +++++++++++++++++++++++++- 1 file changed, 25 insertions(+), 1 deletion(-) (limited to 'drivers/i2c') diff --git a/drivers/i2c/busses/i2c-qcom-geni.c b/drivers/i2c/busses/i2c-qcom-geni.c index 18d1e4fd4cf3..32b2a9921b14 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[GENI_TO_CORE].avg_bw = GENI_DEFAULT_BW; + gi2c->se.icc_paths[CPU_TO_GENI].avg_bw = GENI_DEFAULT_BW; + gi2c->se.icc_paths[GENI_TO_DDR].avg_bw = Bps_to_icc(gi2c->clk_freq_out); + + 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 +595,10 @@ 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 +643,7 @@ 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 +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_enable(&gi2c->se); + if (ret) + return ret; + ret = geni_se_resources_on(&gi2c->se); if (ret) return ret; -- cgit v1.2.3