From mboxrd@z Thu Jan 1 00:00:00 1970 From: Akash Asthana Subject: [PATCH V3 5/8] spi: spi-geni-qcom: Add interconnect support Date: Tue, 31 Mar 2020 16:39:33 +0530 Message-ID: <1585652976-17481-6-git-send-email-akashast@codeaurora.org> References: <1585652976-17481-1-git-send-email-akashast@codeaurora.org> Return-path: Received: from mail27.static.mailgun.info ([104.130.122.27]:40823 "EHLO mail27.static.mailgun.info" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730683AbgCaLM1 (ORCPT ); Tue, 31 Mar 2020 07:12:27 -0400 In-Reply-To: <1585652976-17481-1-git-send-email-akashast@codeaurora.org> Sender: linux-i2c-owner@vger.kernel.org List-Id: linux-i2c@vger.kernel.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 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 --- 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. drivers/spi/spi-geni-qcom.c | 31 ++++++++++++++++++++++++++++++- 1 file changed, 30 insertions(+), 1 deletion(-) diff --git a/drivers/spi/spi-geni-qcom.c b/drivers/spi/spi-geni-qcom.c index c397242..f1dae2d 100644 --- a/drivers/spi/spi-geni-qcom.c +++ b/drivers/spi/spi-geni-qcom.c @@ -234,6 +234,16 @@ static int setup_fifo_params(struct spi_device *spi_slv, return ret; } + /* + * Set BW quota for CPU as driver supports FIFO mode only. + * Assume peak bw as twice of avg bw. + */ + se->from_cpu.avg_bw = Bps_to_icc(mas->cur_speed_hz); + se->from_cpu.peak_bw = Bps_to_icc(2 * 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 +588,15 @@ static int spi_geni_probe(struct platform_device *pdev) spin_lock_init(&mas->lock); pm_runtime_enable(dev); + ret = geni_icc_get(&mas->se, "qup-core", "qup-config", NULL); + if (ret) + goto spi_geni_probe_runtime_disable; + /* Set the bus quota to a reasonable value for register access */ + mas->se.to_core.avg_bw = Bps_to_icc(CORE_2X_50_MHZ); + mas->se.to_core.peak_bw = Bps_to_icc(CORE_2X_100_MHZ); + mas->se.from_cpu.avg_bw = GENI_DEFAULT_BW; + mas->se.from_cpu.peak_bw = GENI_DEFAULT_BW; + ret = spi_geni_init(mas); if (ret) goto spi_geni_probe_runtime_disable; @@ -616,14 +635,24 @@ 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_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