| Message ID | 1710925851-5643-1-git-send-email-shengjiu.wang@nxp.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [v2] clk: imx: imx8mp: Add pm_runtime support for power saving | expand |
On 20.03.2024 17:10:51, Shengjiu Wang wrote: > Add pm_runtime support for power saving. In pm runtime suspend > state the registers will be reseted, so add registers save > in pm runtime suspend and restore them in pm runtime resume. > > Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com> > Reviewed-by: Peng Fan <peng.fan@nxp.com> > --- > changes in v2: > - move pm_runtime_enable before the clk register > > drivers/clk/imx/clk-imx8mp-audiomix.c | 150 +++++++++++++++++++++++--- > 1 file changed, 137 insertions(+), 13 deletions(-) > > diff --git a/drivers/clk/imx/clk-imx8mp-audiomix.c b/drivers/clk/imx/clk-imx8mp-audiomix.c > index 55ed211a5e0b..6042280d6404 100644 > --- a/drivers/clk/imx/clk-imx8mp-audiomix.c > +++ b/drivers/clk/imx/clk-imx8mp-audiomix.c > @@ -7,10 +7,12 @@ > > #include <linux/clk-provider.h> > #include <linux/device.h> > +#include <linux/io.h> > #include <linux/mod_devicetable.h> > #include <linux/module.h> > #include <linux/of.h> > #include <linux/platform_device.h> > +#include <linux/pm_runtime.h> > > #include <dt-bindings/clock/imx8mp-clock.h> > > @@ -18,6 +20,7 @@ > > #define CLKEN0 0x000 > #define CLKEN1 0x004 > +#define EARC 0x200 > #define SAI1_MCLK_SEL 0x300 > #define SAI2_MCLK_SEL 0x304 > #define SAI3_MCLK_SEL 0x308 > @@ -26,6 +29,12 @@ > #define SAI7_MCLK_SEL 0x314 > #define PDM_SEL 0x318 > #define SAI_PLL_GNRL_CTL 0x400 > +#define SAI_PLL_FDIVL_CTL0 0x404 > +#define SAI_PLL_FDIVL_CTL1 0x408 > +#define SAI_PLL_SSCG_CTL 0x40C > +#define SAI_PLL_MNIT_CTL 0x410 > +#define IPG_LP_CTRL 0x504 > +#define REGS_NUM 16 not needed > > #define SAIn_MCLK1_PARENT(n) \ > static const struct clk_parent_data \ > @@ -182,13 +191,65 @@ static struct clk_imx8mp_audiomix_sel sels[] = { > CLK_SAIn(7) > }; > > +struct clk_imx8mp_audiomix_regs { > + u32 regs_num; > + u32 regs_off[]; nitpick: if the offsets fit into an u16 you can save some space. > +}; > + > +static const struct clk_imx8mp_audiomix_regs audiomix_regs = { > + .regs_num = REGS_NUM, > + .regs_off = { > + CLKEN0, > + CLKEN1, > + EARC, > + SAI1_MCLK_SEL, > + SAI2_MCLK_SEL, > + SAI3_MCLK_SEL, > + SAI5_MCLK_SEL, > + SAI6_MCLK_SEL, > + SAI7_MCLK_SEL, > + PDM_SEL, > + SAI_PLL_GNRL_CTL, > + SAI_PLL_FDIVL_CTL0, > + SAI_PLL_FDIVL_CTL1, > + SAI_PLL_SSCG_CTL, > + SAI_PLL_MNIT_CTL, > + IPG_LP_CTRL > + }, > +}; You only need an array with the offsets, use ARRAY_SIZE() to get the number of entries in the array. > + > +struct clk_imx8mp_audiomix_drvdata { > + void __iomem *base; > + u32 regs_save[REGS_NUM]; make use of ARRAY_SIZE() here > +}; > + > +static void clk_imx8mp_audiomix_save_restore(struct device *dev, bool save) > +{ > + struct clk_imx8mp_audiomix_drvdata *drvdata = dev_get_drvdata(dev); > + void __iomem *base = drvdata->base; > + int i; > + > + if (save) { > + for (i = 0; i < audiomix_regs.regs_num; i++) > + drvdata->regs_save[i] = readl(base + audiomix_regs.regs_off[i]); > + } else { > + for (i = 0; i < audiomix_regs.regs_num; i++) > + writel(drvdata->regs_save[i], base + audiomix_regs.regs_off[i]); > + } > +} > + > static int clk_imx8mp_audiomix_probe(struct platform_device *pdev) > { > + struct clk_imx8mp_audiomix_drvdata *drvdata; > struct clk_hw_onecell_data *priv; > struct device *dev = &pdev->dev; > void __iomem *base; > struct clk_hw *hw; > - int i; > + int i, ret; > + > + drvdata = devm_kzalloc(dev, sizeof(*drvdata), GFP_KERNEL); You already allocate memory with devm_kzalloc() below. Why not increase the size? Rename clk_imx8mp_audiomix_drvdata to clk_imx8mp_audiomix_priv and add struct clk_hw_onecell_data to it. > + if (!drvdata) > + return -ENOMEM; > > priv = devm_kzalloc(dev, > struct_size(priv, hws, IMX8MP_CLK_AUDIOMIX_END), > @@ -202,6 +263,18 @@ static int clk_imx8mp_audiomix_probe(struct platform_device *pdev) > if (IS_ERR(base)) > return PTR_ERR(base); > > + drvdata->base = base; > + dev_set_drvdata(dev, drvdata); > + > + /* > + * pm_runtime_enable needs to be called before clk register. > + * That is to make core->rpm_enabled to be true for clock > + * usage. > + */ > + pm_runtime_get_noresume(dev); > + pm_runtime_set_active(dev); > + pm_runtime_enable(dev); > + > for (i = 0; i < ARRAY_SIZE(sels); i++) { > if (sels[i].num_parents == 1) { > hw = devm_clk_hw_register_gate_parent_data(dev, > @@ -216,8 +289,10 @@ static int clk_imx8mp_audiomix_probe(struct platform_device *pdev) > 0, NULL, NULL); > } > > - if (IS_ERR(hw)) > - return PTR_ERR(hw); > + if (IS_ERR(hw)) { > + ret = PTR_ERR(hw); > + goto err_clk_register; > + } > > priv->hws[sels[i].clkid] = hw; > } > @@ -232,8 +307,10 @@ static int clk_imx8mp_audiomix_probe(struct platform_device *pdev) > > hw = imx_dev_clk_hw_pll14xx(dev, "sai_pll", "sai_pll_ref_sel", > base + 0x400, &imx_1443x_pll); > - if (IS_ERR(hw)) > - return PTR_ERR(hw); > + if (IS_ERR(hw)) { > + ret = PTR_ERR(hw); > + goto err_clk_register; > + } > priv->hws[IMX8MP_CLK_AUDIOMIX_SAI_PLL] = hw; > > hw = devm_clk_hw_register_mux_parent_data_table(dev, > @@ -241,26 +318,71 @@ static int clk_imx8mp_audiomix_probe(struct platform_device *pdev) > ARRAY_SIZE(clk_imx8mp_audiomix_pll_bypass_sels), > CLK_SET_RATE_NO_REPARENT | CLK_SET_RATE_PARENT, > base + SAI_PLL_GNRL_CTL, 16, 1, 0, NULL, NULL); > - if (IS_ERR(hw)) > - return PTR_ERR(hw); > + if (IS_ERR(hw)) { > + ret = PTR_ERR(hw); > + goto err_clk_register; > + } > + > priv->hws[IMX8MP_CLK_AUDIOMIX_SAI_PLL_BYPASS] = hw; > > hw = devm_clk_hw_register_gate(dev, "sai_pll_out", "sai_pll_bypass", > 0, base + SAI_PLL_GNRL_CTL, 13, > 0, NULL); > - if (IS_ERR(hw)) > - return PTR_ERR(hw); > + if (IS_ERR(hw)) { > + ret = PTR_ERR(hw); > + goto err_clk_register; > + } > priv->hws[IMX8MP_CLK_AUDIOMIX_SAI_PLL_OUT] = hw; > > hw = devm_clk_hw_register_fixed_factor(dev, "sai_pll_out_div2", > "sai_pll_out", 0, 1, 2); > - if (IS_ERR(hw)) > - return PTR_ERR(hw); > + if (IS_ERR(hw)) { > + ret = PTR_ERR(hw); > + goto err_clk_register; > + } > + > + ret = devm_of_clk_add_hw_provider(&pdev->dev, of_clk_hw_onecell_get, > + priv); > + if (ret) > + goto err_clk_register; > + > + pm_runtime_put_sync(dev); > + return 0; > + > +err_clk_register: > + pm_runtime_put_sync(dev); > + pm_runtime_disable(dev); > + return ret; > +} > + > +static int clk_imx8mp_audiomix_remove(struct platform_device *pdev) > +{ > + pm_runtime_disable(&pdev->dev); > > - return devm_of_clk_add_hw_provider(&pdev->dev, of_clk_hw_onecell_get, > - priv); > + return 0; > } > > +static int clk_imx8mp_audiomix_runtime_suspend(struct device *dev) > +{ > + clk_imx8mp_audiomix_save_restore(dev, true); > + > + return 0; > +} > + > +static int clk_imx8mp_audiomix_runtime_resume(struct device *dev) > +{ > + clk_imx8mp_audiomix_save_restore(dev, false); > + > + return 0; > +} > + > +static const struct dev_pm_ops clk_imx8mp_audiomix_pm_ops = { > + SET_RUNTIME_PM_OPS(clk_imx8mp_audiomix_runtime_suspend, > + clk_imx8mp_audiomix_runtime_resume, NULL) > + SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, > + pm_runtime_force_resume) > +}; > + > static const struct of_device_id clk_imx8mp_audiomix_of_match[] = { > { .compatible = "fsl,imx8mp-audio-blk-ctrl" }, > { /* sentinel */ } > @@ -269,9 +391,11 @@ MODULE_DEVICE_TABLE(of, clk_imx8mp_audiomix_of_match); > > static struct platform_driver clk_imx8mp_audiomix_driver = { > .probe = clk_imx8mp_audiomix_probe, > + .remove = clk_imx8mp_audiomix_remove, > .driver = { > .name = "imx8mp-audio-blk-ctrl", > .of_match_table = clk_imx8mp_audiomix_of_match, > + .pm = &clk_imx8mp_audiomix_pm_ops, > }, > }; > > -- > 2.34.1 > > > regards, Marc
On Wed, Mar 20, 2024 at 5:50 PM Marc Kleine-Budde <mkl@pengutronix.de> wrote: > > On 20.03.2024 17:10:51, Shengjiu Wang wrote: > > Add pm_runtime support for power saving. In pm runtime suspend > > state the registers will be reseted, so add registers save > > in pm runtime suspend and restore them in pm runtime resume. > > > > Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com> > > Reviewed-by: Peng Fan <peng.fan@nxp.com> > > --- > > changes in v2: > > - move pm_runtime_enable before the clk register > > > > drivers/clk/imx/clk-imx8mp-audiomix.c | 150 +++++++++++++++++++++++--- > > 1 file changed, 137 insertions(+), 13 deletions(-) > > > > diff --git a/drivers/clk/imx/clk-imx8mp-audiomix.c b/drivers/clk/imx/clk-imx8mp-audiomix.c > > index 55ed211a5e0b..6042280d6404 100644 > > --- a/drivers/clk/imx/clk-imx8mp-audiomix.c > > +++ b/drivers/clk/imx/clk-imx8mp-audiomix.c > > @@ -7,10 +7,12 @@ > > > > #include <linux/clk-provider.h> > > #include <linux/device.h> > > +#include <linux/io.h> > > #include <linux/mod_devicetable.h> > > #include <linux/module.h> > > #include <linux/of.h> > > #include <linux/platform_device.h> > > +#include <linux/pm_runtime.h> > > > > #include <dt-bindings/clock/imx8mp-clock.h> > > > > @@ -18,6 +20,7 @@ > > > > #define CLKEN0 0x000 > > #define CLKEN1 0x004 > > +#define EARC 0x200 > > #define SAI1_MCLK_SEL 0x300 > > #define SAI2_MCLK_SEL 0x304 > > #define SAI3_MCLK_SEL 0x308 > > @@ -26,6 +29,12 @@ > > #define SAI7_MCLK_SEL 0x314 > > #define PDM_SEL 0x318 > > #define SAI_PLL_GNRL_CTL 0x400 > > +#define SAI_PLL_FDIVL_CTL0 0x404 > > +#define SAI_PLL_FDIVL_CTL1 0x408 > > +#define SAI_PLL_SSCG_CTL 0x40C > > +#define SAI_PLL_MNIT_CTL 0x410 > > +#define IPG_LP_CTRL 0x504 > > +#define REGS_NUM 16 > > not needed > > > > > #define SAIn_MCLK1_PARENT(n) \ > > static const struct clk_parent_data \ > > @@ -182,13 +191,65 @@ static struct clk_imx8mp_audiomix_sel sels[] = { > > CLK_SAIn(7) > > }; > > > > +struct clk_imx8mp_audiomix_regs { > > + u32 regs_num; > > + u32 regs_off[]; > > nitpick: if the offsets fit into an u16 you can save some space. > > > +}; > > + > > +static const struct clk_imx8mp_audiomix_regs audiomix_regs = { > > + .regs_num = REGS_NUM, > > + .regs_off = { > > + CLKEN0, > > + CLKEN1, > > + EARC, > > + SAI1_MCLK_SEL, > > + SAI2_MCLK_SEL, > > + SAI3_MCLK_SEL, > > + SAI5_MCLK_SEL, > > + SAI6_MCLK_SEL, > > + SAI7_MCLK_SEL, > > + PDM_SEL, > > + SAI_PLL_GNRL_CTL, > > + SAI_PLL_FDIVL_CTL0, > > + SAI_PLL_FDIVL_CTL1, > > + SAI_PLL_SSCG_CTL, > > + SAI_PLL_MNIT_CTL, > > + IPG_LP_CTRL > > + }, > > +}; > > You only need an array with the offsets, use ARRAY_SIZE() to get the > number of entries in the array. > > > + > > +struct clk_imx8mp_audiomix_drvdata { > > + void __iomem *base; > > + u32 regs_save[REGS_NUM]; > > make use of ARRAY_SIZE() here > > > +}; > > + > > +static void clk_imx8mp_audiomix_save_restore(struct device *dev, bool save) > > +{ > > + struct clk_imx8mp_audiomix_drvdata *drvdata = dev_get_drvdata(dev); > > + void __iomem *base = drvdata->base; > > + int i; > > + > > + if (save) { > > + for (i = 0; i < audiomix_regs.regs_num; i++) > > + drvdata->regs_save[i] = readl(base + audiomix_regs.regs_off[i]); > > + } else { > > + for (i = 0; i < audiomix_regs.regs_num; i++) > > + writel(drvdata->regs_save[i], base + audiomix_regs.regs_off[i]); > > + } > > +} > > + > > static int clk_imx8mp_audiomix_probe(struct platform_device *pdev) > > { > > + struct clk_imx8mp_audiomix_drvdata *drvdata; > > struct clk_hw_onecell_data *priv; > > struct device *dev = &pdev->dev; > > void __iomem *base; > > struct clk_hw *hw; > > - int i; > > + int i, ret; > > + > > + drvdata = devm_kzalloc(dev, sizeof(*drvdata), GFP_KERNEL); > > You already allocate memory with devm_kzalloc() below. Why not increase > the size? > > Rename clk_imx8mp_audiomix_drvdata to clk_imx8mp_audiomix_priv > and add struct clk_hw_onecell_data to it. Ok, I will update according to all the comments in the next version. best regards wang shengjiu > > > + if (!drvdata) > > + return -ENOMEM; > > > > priv = devm_kzalloc(dev, > > struct_size(priv, hws, IMX8MP_CLK_AUDIOMIX_END), > > @@ -202,6 +263,18 @@ static int clk_imx8mp_audiomix_probe(struct platform_device *pdev) > > if (IS_ERR(base)) > > return PTR_ERR(base); > > > > + drvdata->base = base; > > + dev_set_drvdata(dev, drvdata); > > + > > + /* > > + * pm_runtime_enable needs to be called before clk register. > > + * That is to make core->rpm_enabled to be true for clock > > + * usage. > > + */ > > + pm_runtime_get_noresume(dev); > > + pm_runtime_set_active(dev); > > + pm_runtime_enable(dev); > > + > > for (i = 0; i < ARRAY_SIZE(sels); i++) { > > if (sels[i].num_parents == 1) { > > hw = devm_clk_hw_register_gate_parent_data(dev, > > @@ -216,8 +289,10 @@ static int clk_imx8mp_audiomix_probe(struct platform_device *pdev) > > 0, NULL, NULL); > > } > > > > - if (IS_ERR(hw)) > > - return PTR_ERR(hw); > > + if (IS_ERR(hw)) { > > + ret = PTR_ERR(hw); > > + goto err_clk_register; > > + } > > > > priv->hws[sels[i].clkid] = hw; > > } > > @@ -232,8 +307,10 @@ static int clk_imx8mp_audiomix_probe(struct platform_device *pdev) > > > > hw = imx_dev_clk_hw_pll14xx(dev, "sai_pll", "sai_pll_ref_sel", > > base + 0x400, &imx_1443x_pll); > > - if (IS_ERR(hw)) > > - return PTR_ERR(hw); > > + if (IS_ERR(hw)) { > > + ret = PTR_ERR(hw); > > + goto err_clk_register; > > + } > > priv->hws[IMX8MP_CLK_AUDIOMIX_SAI_PLL] = hw; > > > > hw = devm_clk_hw_register_mux_parent_data_table(dev, > > @@ -241,26 +318,71 @@ static int clk_imx8mp_audiomix_probe(struct platform_device *pdev) > > ARRAY_SIZE(clk_imx8mp_audiomix_pll_bypass_sels), > > CLK_SET_RATE_NO_REPARENT | CLK_SET_RATE_PARENT, > > base + SAI_PLL_GNRL_CTL, 16, 1, 0, NULL, NULL); > > - if (IS_ERR(hw)) > > - return PTR_ERR(hw); > > + if (IS_ERR(hw)) { > > + ret = PTR_ERR(hw); > > + goto err_clk_register; > > + } > > + > > priv->hws[IMX8MP_CLK_AUDIOMIX_SAI_PLL_BYPASS] = hw; > > > > hw = devm_clk_hw_register_gate(dev, "sai_pll_out", "sai_pll_bypass", > > 0, base + SAI_PLL_GNRL_CTL, 13, > > 0, NULL); > > - if (IS_ERR(hw)) > > - return PTR_ERR(hw); > > + if (IS_ERR(hw)) { > > + ret = PTR_ERR(hw); > > + goto err_clk_register; > > + } > > priv->hws[IMX8MP_CLK_AUDIOMIX_SAI_PLL_OUT] = hw; > > > > hw = devm_clk_hw_register_fixed_factor(dev, "sai_pll_out_div2", > > "sai_pll_out", 0, 1, 2); > > - if (IS_ERR(hw)) > > - return PTR_ERR(hw); > > + if (IS_ERR(hw)) { > > + ret = PTR_ERR(hw); > > + goto err_clk_register; > > + } > > + > > + ret = devm_of_clk_add_hw_provider(&pdev->dev, of_clk_hw_onecell_get, > > + priv); > > + if (ret) > > + goto err_clk_register; > > + > > + pm_runtime_put_sync(dev); > > + return 0; > > + > > +err_clk_register: > > + pm_runtime_put_sync(dev); > > + pm_runtime_disable(dev); > > + return ret; > > +} > > + > > +static int clk_imx8mp_audiomix_remove(struct platform_device *pdev) > > +{ > > + pm_runtime_disable(&pdev->dev); > > > > - return devm_of_clk_add_hw_provider(&pdev->dev, of_clk_hw_onecell_get, > > - priv); > > + return 0; > > } > > > > +static int clk_imx8mp_audiomix_runtime_suspend(struct device *dev) > > +{ > > + clk_imx8mp_audiomix_save_restore(dev, true); > > + > > + return 0; > > +} > > + > > +static int clk_imx8mp_audiomix_runtime_resume(struct device *dev) > > +{ > > + clk_imx8mp_audiomix_save_restore(dev, false); > > + > > + return 0; > > +} > > + > > +static const struct dev_pm_ops clk_imx8mp_audiomix_pm_ops = { > > + SET_RUNTIME_PM_OPS(clk_imx8mp_audiomix_runtime_suspend, > > + clk_imx8mp_audiomix_runtime_resume, NULL) > > + SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, > > + pm_runtime_force_resume) > > +}; > > + > > static const struct of_device_id clk_imx8mp_audiomix_of_match[] = { > > { .compatible = "fsl,imx8mp-audio-blk-ctrl" }, > > { /* sentinel */ } > > @@ -269,9 +391,11 @@ MODULE_DEVICE_TABLE(of, clk_imx8mp_audiomix_of_match); > > > > static struct platform_driver clk_imx8mp_audiomix_driver = { > > .probe = clk_imx8mp_audiomix_probe, > > + .remove = clk_imx8mp_audiomix_remove, > > .driver = { > > .name = "imx8mp-audio-blk-ctrl", > > .of_match_table = clk_imx8mp_audiomix_of_match, > > + .pm = &clk_imx8mp_audiomix_pm_ops, > > }, > > }; > > > > -- > > 2.34.1 > > > > > > > > regards, > Marc > > -- > Pengutronix e.K. | Marc Kleine-Budde | > Embedded Linux | https://www.pengutronix.de | > Vertretung Nürnberg | Phone: +49-5121-206917-129 | > Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-9 |
diff --git a/drivers/clk/imx/clk-imx8mp-audiomix.c b/drivers/clk/imx/clk-imx8mp-audiomix.c index 55ed211a5e0b..6042280d6404 100644 --- a/drivers/clk/imx/clk-imx8mp-audiomix.c +++ b/drivers/clk/imx/clk-imx8mp-audiomix.c @@ -7,10 +7,12 @@ #include <linux/clk-provider.h> #include <linux/device.h> +#include <linux/io.h> #include <linux/mod_devicetable.h> #include <linux/module.h> #include <linux/of.h> #include <linux/platform_device.h> +#include <linux/pm_runtime.h> #include <dt-bindings/clock/imx8mp-clock.h> @@ -18,6 +20,7 @@ #define CLKEN0 0x000 #define CLKEN1 0x004 +#define EARC 0x200 #define SAI1_MCLK_SEL 0x300 #define SAI2_MCLK_SEL 0x304 #define SAI3_MCLK_SEL 0x308 @@ -26,6 +29,12 @@ #define SAI7_MCLK_SEL 0x314 #define PDM_SEL 0x318 #define SAI_PLL_GNRL_CTL 0x400 +#define SAI_PLL_FDIVL_CTL0 0x404 +#define SAI_PLL_FDIVL_CTL1 0x408 +#define SAI_PLL_SSCG_CTL 0x40C +#define SAI_PLL_MNIT_CTL 0x410 +#define IPG_LP_CTRL 0x504 +#define REGS_NUM 16 #define SAIn_MCLK1_PARENT(n) \ static const struct clk_parent_data \ @@ -182,13 +191,65 @@ static struct clk_imx8mp_audiomix_sel sels[] = { CLK_SAIn(7) }; +struct clk_imx8mp_audiomix_regs { + u32 regs_num; + u32 regs_off[]; +}; + +static const struct clk_imx8mp_audiomix_regs audiomix_regs = { + .regs_num = REGS_NUM, + .regs_off = { + CLKEN0, + CLKEN1, + EARC, + SAI1_MCLK_SEL, + SAI2_MCLK_SEL, + SAI3_MCLK_SEL, + SAI5_MCLK_SEL, + SAI6_MCLK_SEL, + SAI7_MCLK_SEL, + PDM_SEL, + SAI_PLL_GNRL_CTL, + SAI_PLL_FDIVL_CTL0, + SAI_PLL_FDIVL_CTL1, + SAI_PLL_SSCG_CTL, + SAI_PLL_MNIT_CTL, + IPG_LP_CTRL + }, +}; + +struct clk_imx8mp_audiomix_drvdata { + void __iomem *base; + u32 regs_save[REGS_NUM]; +}; + +static void clk_imx8mp_audiomix_save_restore(struct device *dev, bool save) +{ + struct clk_imx8mp_audiomix_drvdata *drvdata = dev_get_drvdata(dev); + void __iomem *base = drvdata->base; + int i; + + if (save) { + for (i = 0; i < audiomix_regs.regs_num; i++) + drvdata->regs_save[i] = readl(base + audiomix_regs.regs_off[i]); + } else { + for (i = 0; i < audiomix_regs.regs_num; i++) + writel(drvdata->regs_save[i], base + audiomix_regs.regs_off[i]); + } +} + static int clk_imx8mp_audiomix_probe(struct platform_device *pdev) { + struct clk_imx8mp_audiomix_drvdata *drvdata; struct clk_hw_onecell_data *priv; struct device *dev = &pdev->dev; void __iomem *base; struct clk_hw *hw; - int i; + int i, ret; + + drvdata = devm_kzalloc(dev, sizeof(*drvdata), GFP_KERNEL); + if (!drvdata) + return -ENOMEM; priv = devm_kzalloc(dev, struct_size(priv, hws, IMX8MP_CLK_AUDIOMIX_END), @@ -202,6 +263,18 @@ static int clk_imx8mp_audiomix_probe(struct platform_device *pdev) if (IS_ERR(base)) return PTR_ERR(base); + drvdata->base = base; + dev_set_drvdata(dev, drvdata); + + /* + * pm_runtime_enable needs to be called before clk register. + * That is to make core->rpm_enabled to be true for clock + * usage. + */ + pm_runtime_get_noresume(dev); + pm_runtime_set_active(dev); + pm_runtime_enable(dev); + for (i = 0; i < ARRAY_SIZE(sels); i++) { if (sels[i].num_parents == 1) { hw = devm_clk_hw_register_gate_parent_data(dev, @@ -216,8 +289,10 @@ static int clk_imx8mp_audiomix_probe(struct platform_device *pdev) 0, NULL, NULL); } - if (IS_ERR(hw)) - return PTR_ERR(hw); + if (IS_ERR(hw)) { + ret = PTR_ERR(hw); + goto err_clk_register; + } priv->hws[sels[i].clkid] = hw; } @@ -232,8 +307,10 @@ static int clk_imx8mp_audiomix_probe(struct platform_device *pdev) hw = imx_dev_clk_hw_pll14xx(dev, "sai_pll", "sai_pll_ref_sel", base + 0x400, &imx_1443x_pll); - if (IS_ERR(hw)) - return PTR_ERR(hw); + if (IS_ERR(hw)) { + ret = PTR_ERR(hw); + goto err_clk_register; + } priv->hws[IMX8MP_CLK_AUDIOMIX_SAI_PLL] = hw; hw = devm_clk_hw_register_mux_parent_data_table(dev, @@ -241,26 +318,71 @@ static int clk_imx8mp_audiomix_probe(struct platform_device *pdev) ARRAY_SIZE(clk_imx8mp_audiomix_pll_bypass_sels), CLK_SET_RATE_NO_REPARENT | CLK_SET_RATE_PARENT, base + SAI_PLL_GNRL_CTL, 16, 1, 0, NULL, NULL); - if (IS_ERR(hw)) - return PTR_ERR(hw); + if (IS_ERR(hw)) { + ret = PTR_ERR(hw); + goto err_clk_register; + } + priv->hws[IMX8MP_CLK_AUDIOMIX_SAI_PLL_BYPASS] = hw; hw = devm_clk_hw_register_gate(dev, "sai_pll_out", "sai_pll_bypass", 0, base + SAI_PLL_GNRL_CTL, 13, 0, NULL); - if (IS_ERR(hw)) - return PTR_ERR(hw); + if (IS_ERR(hw)) { + ret = PTR_ERR(hw); + goto err_clk_register; + } priv->hws[IMX8MP_CLK_AUDIOMIX_SAI_PLL_OUT] = hw; hw = devm_clk_hw_register_fixed_factor(dev, "sai_pll_out_div2", "sai_pll_out", 0, 1, 2); - if (IS_ERR(hw)) - return PTR_ERR(hw); + if (IS_ERR(hw)) { + ret = PTR_ERR(hw); + goto err_clk_register; + } + + ret = devm_of_clk_add_hw_provider(&pdev->dev, of_clk_hw_onecell_get, + priv); + if (ret) + goto err_clk_register; + + pm_runtime_put_sync(dev); + return 0; + +err_clk_register: + pm_runtime_put_sync(dev); + pm_runtime_disable(dev); + return ret; +} + +static int clk_imx8mp_audiomix_remove(struct platform_device *pdev) +{ + pm_runtime_disable(&pdev->dev); - return devm_of_clk_add_hw_provider(&pdev->dev, of_clk_hw_onecell_get, - priv); + return 0; } +static int clk_imx8mp_audiomix_runtime_suspend(struct device *dev) +{ + clk_imx8mp_audiomix_save_restore(dev, true); + + return 0; +} + +static int clk_imx8mp_audiomix_runtime_resume(struct device *dev) +{ + clk_imx8mp_audiomix_save_restore(dev, false); + + return 0; +} + +static const struct dev_pm_ops clk_imx8mp_audiomix_pm_ops = { + SET_RUNTIME_PM_OPS(clk_imx8mp_audiomix_runtime_suspend, + clk_imx8mp_audiomix_runtime_resume, NULL) + SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, + pm_runtime_force_resume) +}; + static const struct of_device_id clk_imx8mp_audiomix_of_match[] = { { .compatible = "fsl,imx8mp-audio-blk-ctrl" }, { /* sentinel */ } @@ -269,9 +391,11 @@ MODULE_DEVICE_TABLE(of, clk_imx8mp_audiomix_of_match); static struct platform_driver clk_imx8mp_audiomix_driver = { .probe = clk_imx8mp_audiomix_probe, + .remove = clk_imx8mp_audiomix_remove, .driver = { .name = "imx8mp-audio-blk-ctrl", .of_match_table = clk_imx8mp_audiomix_of_match, + .pm = &clk_imx8mp_audiomix_pm_ops, }, };