| Message ID | 1588080785-6812-3-git-send-email-rnayak@codeaurora.org (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
| Series | DVFS for IO devices on sdm845 and sc7180 | expand |
On Tue, Apr 28, 2020 at 07:02:50PM +0530, Rajendra Nayak wrote: > geni spi needs to express a perforamnce state requirement on CX > depending on the frequency of the clock rates. Use OPP table from > DT to register with OPP framework and use dev_pm_opp_set_rate() to > set the clk/perf state. > > Signed-off-by: Rajendra Nayak <rnayak@codeaurora.org> > Cc: Mark Brown <broonie@kernel.org> > Cc: Alok Chauhan <alokc@codeaurora.org> > Cc: Akash Asthana <akashast@codeaurora.org> > Cc: linux-spi@vger.kernel.org > --- > This patch has a dependency on the 'PATCH 01/17' in this series, > due to the changes in include/linux/qcom-geni-se.h > Its ideal if this and the previous patch gets merged via the > msm tree (once reviewed and ack'ed) > Greg has already responded he is fine with it for serial. > > drivers/spi/spi-geni-qcom.c | 26 +++++++++++++++++++++++--- > 1 file changed, 23 insertions(+), 3 deletions(-) > > diff --git a/drivers/spi/spi-geni-qcom.c b/drivers/spi/spi-geni-qcom.c > index c397242..51186c3 100644 > --- a/drivers/spi/spi-geni-qcom.c > +++ b/drivers/spi/spi-geni-qcom.c > @@ -7,6 +7,7 @@ > #include <linux/log2.h> > #include <linux/module.h> > #include <linux/platform_device.h> > +#include <linux/pm_opp.h> > #include <linux/pm_runtime.h> > #include <linux/qcom-geni-se.h> > #include <linux/spi/spi.h> > @@ -95,7 +96,6 @@ static int get_spi_clk_cfg(unsigned int speed_hz, > { > unsigned long sclk_freq; > unsigned int actual_hz; > - struct geni_se *se = &mas->se; > int ret; > > ret = geni_se_clk_freq_match(&mas->se, > @@ -112,9 +112,9 @@ static int get_spi_clk_cfg(unsigned int speed_hz, > > dev_dbg(mas->dev, "req %u=>%u sclk %lu, idx %d, div %d\n", speed_hz, > actual_hz, sclk_freq, *clk_idx, *clk_div); > - ret = clk_set_rate(se->clk, sclk_freq); > + ret = dev_pm_opp_set_rate(mas->dev, sclk_freq); > if (ret) > - dev_err(mas->dev, "clk_set_rate failed %d\n", ret); > + dev_err(mas->dev, "dev_pm_opp_set_rate failed %d\n", ret); > return ret; > } > > @@ -561,6 +561,17 @@ static int spi_geni_probe(struct platform_device *pdev) > mas->se.wrapper = dev_get_drvdata(dev->parent); > mas->se.base = base; > mas->se.clk = clk; > + mas->se.opp_table = dev_pm_opp_set_clkname(&pdev->dev, "se"); > + if (IS_ERR(mas->se.opp_table)) > + return PTR_ERR(mas->se.opp_table); > + /* OPP table is optional */ > + ret = dev_pm_opp_of_add_table(&pdev->dev); > + if (!ret) { > + mas->se.has_opp_table = true; > + } else if (ret != -ENODEV) { > + dev_err(&pdev->dev, "Invalid OPP table in Device tree\n"); > + return ret; > + } > > spi->bus_num = -1; > spi->dev.of_node = dev->of_node; > @@ -596,6 +607,9 @@ static int spi_geni_probe(struct platform_device *pdev) > spi_geni_probe_runtime_disable: > pm_runtime_disable(dev); > spi_master_put(spi); > + if (mas->se.has_opp_table) > + dev_pm_opp_of_remove_table(&pdev->dev); > + dev_pm_opp_put_clkname(mas->se.opp_table); > return ret; > } > > @@ -604,6 +618,9 @@ static int spi_geni_remove(struct platform_device *pdev) > struct spi_master *spi = platform_get_drvdata(pdev); > struct spi_geni_master *mas = spi_master_get_devdata(spi); > > + if (mas->se.has_opp_table) > + dev_pm_opp_of_remove_table(&pdev->dev); > + dev_pm_opp_put_clkname(mas->se.opp_table); > /* Unregister _before_ disabling pm_runtime() so we stop transfers */ > spi_unregister_master(spi); > > @@ -617,6 +634,9 @@ 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); > > + /* Drop the performance state vote */ > + dev_pm_opp_set_rate(dev, 0); > + > return geni_se_resources_off(&mas->se); > } Reviewed-by: Matthias Kaehlcke <mka@chromium.org>
diff --git a/drivers/spi/spi-geni-qcom.c b/drivers/spi/spi-geni-qcom.c index c397242..51186c3 100644 --- a/drivers/spi/spi-geni-qcom.c +++ b/drivers/spi/spi-geni-qcom.c @@ -7,6 +7,7 @@ #include <linux/log2.h> #include <linux/module.h> #include <linux/platform_device.h> +#include <linux/pm_opp.h> #include <linux/pm_runtime.h> #include <linux/qcom-geni-se.h> #include <linux/spi/spi.h> @@ -95,7 +96,6 @@ static int get_spi_clk_cfg(unsigned int speed_hz, { unsigned long sclk_freq; unsigned int actual_hz; - struct geni_se *se = &mas->se; int ret; ret = geni_se_clk_freq_match(&mas->se, @@ -112,9 +112,9 @@ static int get_spi_clk_cfg(unsigned int speed_hz, dev_dbg(mas->dev, "req %u=>%u sclk %lu, idx %d, div %d\n", speed_hz, actual_hz, sclk_freq, *clk_idx, *clk_div); - ret = clk_set_rate(se->clk, sclk_freq); + ret = dev_pm_opp_set_rate(mas->dev, sclk_freq); if (ret) - dev_err(mas->dev, "clk_set_rate failed %d\n", ret); + dev_err(mas->dev, "dev_pm_opp_set_rate failed %d\n", ret); return ret; } @@ -561,6 +561,17 @@ static int spi_geni_probe(struct platform_device *pdev) mas->se.wrapper = dev_get_drvdata(dev->parent); mas->se.base = base; mas->se.clk = clk; + mas->se.opp_table = dev_pm_opp_set_clkname(&pdev->dev, "se"); + if (IS_ERR(mas->se.opp_table)) + return PTR_ERR(mas->se.opp_table); + /* OPP table is optional */ + ret = dev_pm_opp_of_add_table(&pdev->dev); + if (!ret) { + mas->se.has_opp_table = true; + } else if (ret != -ENODEV) { + dev_err(&pdev->dev, "Invalid OPP table in Device tree\n"); + return ret; + } spi->bus_num = -1; spi->dev.of_node = dev->of_node; @@ -596,6 +607,9 @@ static int spi_geni_probe(struct platform_device *pdev) spi_geni_probe_runtime_disable: pm_runtime_disable(dev); spi_master_put(spi); + if (mas->se.has_opp_table) + dev_pm_opp_of_remove_table(&pdev->dev); + dev_pm_opp_put_clkname(mas->se.opp_table); return ret; } @@ -604,6 +618,9 @@ static int spi_geni_remove(struct platform_device *pdev) struct spi_master *spi = platform_get_drvdata(pdev); struct spi_geni_master *mas = spi_master_get_devdata(spi); + if (mas->se.has_opp_table) + dev_pm_opp_of_remove_table(&pdev->dev); + dev_pm_opp_put_clkname(mas->se.opp_table); /* Unregister _before_ disabling pm_runtime() so we stop transfers */ spi_unregister_master(spi); @@ -617,6 +634,9 @@ 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); + /* Drop the performance state vote */ + dev_pm_opp_set_rate(dev, 0); + return geni_se_resources_off(&mas->se); }
geni spi needs to express a perforamnce state requirement on CX depending on the frequency of the clock rates. Use OPP table from DT to register with OPP framework and use dev_pm_opp_set_rate() to set the clk/perf state. Signed-off-by: Rajendra Nayak <rnayak@codeaurora.org> Cc: Mark Brown <broonie@kernel.org> Cc: Alok Chauhan <alokc@codeaurora.org> Cc: Akash Asthana <akashast@codeaurora.org> Cc: linux-spi@vger.kernel.org --- This patch has a dependency on the 'PATCH 01/17' in this series, due to the changes in include/linux/qcom-geni-se.h Its ideal if this and the previous patch gets merged via the msm tree (once reviewed and ack'ed) Greg has already responded he is fine with it for serial. drivers/spi/spi-geni-qcom.c | 26 +++++++++++++++++++++++--- 1 file changed, 23 insertions(+), 3 deletions(-)