@@ -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 +585,19 @@ 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);
+
+ /* Set BW for register access */
+ 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 +636,24 @@ 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);
}
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> --- 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. drivers/spi/spi-geni-qcom.c | 32 +++++++++++++++++++++++++++++++- 1 file changed, 31 insertions(+), 1 deletion(-)