From: Akash Asthana <akashast@codeaurora.org>
To: gregkh@linuxfoundation.org, agross@kernel.org,
bjorn.andersson@linaro.org, wsa@the-dreams.de,
broonie@kernel.org, mark.rutland@arm.com, robh+dt@kernel.org,
georgi.djakov@linaro.org
Cc: linux-i2c@vger.kernel.org, linux-spi@vger.kernel.org,
devicetree@vger.kernel.org, swboyd@chromium.org,
mgautam@codeaurora.org, linux-arm-msm@vger.kernel.org,
linux-serial@vger.kernel.org, mka@chromium.org,
dianders@chromium.org, evgreen@chromium.org,
Akash Asthana <akashast@codeaurora.org>
Subject: [PATCH V4 6/9] spi: spi-geni-qcom: Add interconnect support
Date: Wed, 15 Apr 2020 15:53:15 +0530 [thread overview]
Message-ID: <1586946198-13912-7-git-send-email-akashast@codeaurora.org> (raw)
In-Reply-To: <1586946198-13912-1-git-send-email-akashast@codeaurora.org>
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>
---
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.
drivers/spi/spi-geni-qcom.c | 25 ++++++++++++++++++++++++-
1 file changed, 24 insertions(+), 1 deletion(-)
diff --git a/drivers/spi/spi-geni-qcom.c b/drivers/spi/spi-geni-qcom.c
index c397242..782d495 100644
--- a/drivers/spi/spi-geni-qcom.c
+++ b/drivers/spi/spi-geni-qcom.c
@@ -234,6 +234,12 @@ static int setup_fifo_params(struct spi_device *spi_slv,
return ret;
}
+ /* Set BW quota for CPU as driver supports FIFO mode only. */
+ se->icc_paths[1].avg_bw = Bps_to_icc(mas->cur_speed_hz);
+ ret = geni_icc_vote_on(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 +584,13 @@ 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 */
+ mas->se.icc_paths[0].avg_bw = Bps_to_icc(CORE_2X_50_MHZ);
+ mas->se.icc_paths[1].avg_bw = GENI_DEFAULT_BW;
+
ret = spi_geni_init(mas);
if (ret)
goto spi_geni_probe_runtime_disable;
@@ -616,14 +629,24 @@ 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;
- return geni_se_resources_off(&mas->se);
+ ret = geni_se_resources_off(&mas->se);
+ if (ret)
+ return ret;
+
+ return geni_icc_vote_off(&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_vote_on(&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
next prev parent reply other threads:[~2020-04-15 10:38 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-15 10:23 [PATCH V4 0/9] Add interconnect support to QSPI and QUP drivers Akash Asthana
2020-04-15 10:23 ` [PATCH V4 1/9] interconnect: Add devm_of_icc_get() as exported API for users Akash Asthana
2020-04-28 16:04 ` Georgi Djakov
2020-04-15 10:23 ` [PATCH V4 2/9] interconnect: Set peak requirement as twice of average Akash Asthana
2020-04-23 9:31 ` Georgi Djakov
2020-04-28 9:46 ` Akash Asthana
2020-04-28 10:53 ` Georgi Djakov
2020-04-15 10:23 ` [PATCH V4 3/9] soc: qcom: geni: Support for ICC voting Akash Asthana
2020-04-15 23:36 ` Matthias Kaehlcke
2020-04-28 9:48 ` Akash Asthana
2020-04-15 10:23 ` [PATCH V4 4/9] soc: qcom-geni-se: Add interconnect support to fix earlycon crash Akash Asthana
2020-04-16 0:31 ` Matthias Kaehlcke
2020-04-28 10:21 ` Akash Asthana
2020-04-28 15:48 ` Matthias Kaehlcke
2020-04-15 10:23 ` [PATCH V4 5/9] i2c: i2c-qcom-geni: Add interconnect support Akash Asthana
2020-04-16 17:09 ` Matthias Kaehlcke
2020-04-15 10:23 ` Akash Asthana [this message]
2020-04-15 11:39 ` [PATCH V4 6/9] spi: spi-geni-qcom: " Mark Brown
2020-04-15 10:23 ` [PATCH V4 7/9] tty: serial: qcom_geni_serial: " Akash Asthana
2020-04-16 17:17 ` Matthias Kaehlcke
2020-04-15 10:23 ` [PATCH V4 8/9] spi: spi-qcom-qspi: " Akash Asthana
2020-04-15 10:23 ` [PATCH V4 9/9] arm64: dts: sc7180: Add interconnect for QUP and QSPI Akash Asthana
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