| Message ID | 1490182543-28550-4-git-send-email-m.szyprowski@samsung.com (mailing list archive) |
|---|---|
| State | Superseded, archived |
| Delegated to: | Stephen Boyd |
| Headers | show |
On 22 March 2017 at 12:35, Marek Szyprowski <m.szyprowski@samsung.com> wrote: > Add runtime pm support for all clock controller units (CMU), which belongs > to power domains and require special handling during on/off operations. > Typically special values has to be written to MUX registers to change > internal clocks parents to OSC clock before turning power off. During such > operation all clocks, which enters CMU has to be enabled to let MUX to > stabilize. Also for each CMU there is one special parent clock, which has > to be enabled all the time when any access to CMU registers is done. > > This patch solves most of the mysterious external abort and freeze issues > caused by a lack of proper parent CMU clock enabled or incorrect turn off > procedure. > > Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org> Kind regards Uffe > --- > .../devicetree/bindings/clock/exynos5433-clock.txt | 16 + > drivers/clk/samsung/clk-exynos5433.c | 413 ++++++++++++++++----- > drivers/clk/samsung/clk.h | 6 + > 3 files changed, 350 insertions(+), 85 deletions(-) > > diff --git a/Documentation/devicetree/bindings/clock/exynos5433-clock.txt b/Documentation/devicetree/bindings/clock/exynos5433-clock.txt > index 1dc80f8811fe..5c7dd12e667a 100644 > --- a/Documentation/devicetree/bindings/clock/exynos5433-clock.txt > +++ b/Documentation/devicetree/bindings/clock/exynos5433-clock.txt > @@ -168,6 +168,11 @@ Required Properties: > - aclk_cam1_400 > - aclk_cam1_552 > > +Optional properties: > + - power-domains: a phandle to respective power domain node as described by > + generic PM domain bindings (see power/power_domain.txt for more > + information). > + > Each clock is assigned an identifier and client nodes can use this identifier > to specify the clock which they consume. > > @@ -270,6 +275,7 @@ Example 2: Examples of clock controller nodes are listed below. > clocks = <&xxti>, > <&cmu_top CLK_ACLK_G2D_266>, > <&cmu_top CLK_ACLK_G2D_400>; > + power-domains = <&pd_g2d>; > }; > > cmu_disp: clock-controller@13b90000 { > @@ -295,6 +301,7 @@ Example 2: Examples of clock controller nodes are listed below. > <&cmu_mif CLK_SCLK_DECON_ECLK_DISP>, > <&cmu_mif CLK_SCLK_DECON_TV_VCLK_DISP>, > <&cmu_mif CLK_ACLK_DISP_333>; > + power-domains = <&pd_disp>; > }; > > cmu_aud: clock-controller@114c0000 { > @@ -304,6 +311,7 @@ Example 2: Examples of clock controller nodes are listed below. > > clock-names = "oscclk", "fout_aud_pll"; > clocks = <&xxti>, <&cmu_top CLK_FOUT_AUD_PLL>; > + power-domains = <&pd_aud>; > }; > > cmu_bus0: clock-controller@13600000 { > @@ -340,6 +348,7 @@ Example 2: Examples of clock controller nodes are listed below. > > clock-names = "oscclk", "aclk_g3d_400"; > clocks = <&xxti>, <&cmu_top CLK_ACLK_G3D_400>; > + power-domains = <&pd_g3d>; > }; > > cmu_gscl: clock-controller@13cf0000 { > @@ -353,6 +362,7 @@ Example 2: Examples of clock controller nodes are listed below. > clocks = <&xxti>, > <&cmu_top CLK_ACLK_GSCL_111>, > <&cmu_top CLK_ACLK_GSCL_333>; > + power-domains = <&pd_gscl>; > }; > > cmu_apollo: clock-controller@11900000 { > @@ -384,6 +394,7 @@ Example 2: Examples of clock controller nodes are listed below. > clocks = <&xxti>, > <&cmu_top CLK_SCLK_JPEG_MSCL>, > <&cmu_top CLK_ACLK_MSCL_400>; > + power-domains = <&pd_mscl>; > }; > > cmu_mfc: clock-controller@15280000 { > @@ -393,6 +404,7 @@ Example 2: Examples of clock controller nodes are listed below. > > clock-names = "oscclk", "aclk_mfc_400"; > clocks = <&xxti>, <&cmu_top CLK_ACLK_MFC_400>; > + power-domains = <&pd_mfc>; > }; > > cmu_hevc: clock-controller@14f80000 { > @@ -402,6 +414,7 @@ Example 2: Examples of clock controller nodes are listed below. > > clock-names = "oscclk", "aclk_hevc_400"; > clocks = <&xxti>, <&cmu_top CLK_ACLK_HEVC_400>; > + power-domains = <&pd_hevc>; > }; > > cmu_isp: clock-controller@146d0000 { > @@ -415,6 +428,7 @@ Example 2: Examples of clock controller nodes are listed below. > clocks = <&xxti>, > <&cmu_top CLK_ACLK_ISP_DIS_400>, > <&cmu_top CLK_ACLK_ISP_400>; > + power-domains = <&pd_isp>; > }; > > cmu_cam0: clock-controller@120d0000 { > @@ -430,6 +444,7 @@ Example 2: Examples of clock controller nodes are listed below. > <&cmu_top CLK_ACLK_CAM0_333>, > <&cmu_top CLK_ACLK_CAM0_400>, > <&cmu_top CLK_ACLK_CAM0_552>; > + power-domains = <&pd_cam0>; > }; > > cmu_cam1: clock-controller@145d0000 { > @@ -451,6 +466,7 @@ Example 2: Examples of clock controller nodes are listed below. > <&cmu_top CLK_ACLK_CAM1_333>, > <&cmu_top CLK_ACLK_CAM1_400>, > <&cmu_top CLK_ACLK_CAM1_552>; > + power-domains = <&pd_cam1>; > }; > > Example 3: UART controller node that consumes the clock generated by the clock > diff --git a/drivers/clk/samsung/clk-exynos5433.c b/drivers/clk/samsung/clk-exynos5433.c > index 11343a597093..a0d88ce948d7 100644 > --- a/drivers/clk/samsung/clk-exynos5433.c > +++ b/drivers/clk/samsung/clk-exynos5433.c > @@ -9,9 +9,14 @@ > * Common Clock Framework support for Exynos5433 SoC. > */ > > +#include <linux/clk.h> > #include <linux/clk-provider.h> > #include <linux/of.h> > #include <linux/of_address.h> > +#include <linux/of_device.h> > +#include <linux/platform_device.h> > +#include <linux/pm_runtime.h> > +#include <linux/slab.h> > > #include <dt-bindings/clock/exynos5433.h> > > @@ -1991,6 +1996,14 @@ static void __init exynos5433_cmu_peris_init(struct device_node *np) > ENABLE_IP_FSYS1, > }; > > +static const struct samsung_clk_reg_dump fsys_suspend_regs[] = { > + { MUX_SEL_FSYS0, 0 }, > + { MUX_SEL_FSYS1, 0 }, > + { MUX_SEL_FSYS2, 0 }, > + { MUX_SEL_FSYS3, 0 }, > + { MUX_SEL_FSYS4, 0 }, > +}; > + > static const struct samsung_fixed_rate_clock fsys_fixed_clks[] __initconst = { > /* PHY clocks from USBDRD30_PHY */ > FRATE(CLK_PHYCLK_USBDRD30_UDRD30_PHYCLOCK_PHY, > @@ -2296,16 +2309,11 @@ static void __init exynos5433_cmu_peris_init(struct device_node *np) > .nr_clk_ids = FSYS_NR_CLK, > .clk_regs = fsys_clk_regs, > .nr_clk_regs = ARRAY_SIZE(fsys_clk_regs), > + .suspend_regs = fsys_suspend_regs, > + .nr_suspend_regs = ARRAY_SIZE(fsys_suspend_regs), > + .clk_name = "aclk_fsys_200", > }; > > -static void __init exynos5433_cmu_fsys_init(struct device_node *np) > -{ > - samsung_cmu_register_one(np, &fsys_cmu_info); > -} > - > -CLK_OF_DECLARE(exynos5433_cmu_fsys, "samsung,exynos5433-cmu-fsys", > - exynos5433_cmu_fsys_init); > - > /* > * Register offset definitions for CMU_G2D > */ > @@ -2335,6 +2343,10 @@ static void __init exynos5433_cmu_fsys_init(struct device_node *np) > DIV_ENABLE_IP_G2D_SECURE_SMMU_G2D, > }; > > +static const struct samsung_clk_reg_dump g2d_suspend_regs[] = { > + { MUX_SEL_G2D0, 0 }, > +}; > + > /* list of all parent clock list */ > PNAME(mout_aclk_g2d_266_user_p) = { "oscclk", "aclk_g2d_266", }; > PNAME(mout_aclk_g2d_400_user_p) = { "oscclk", "aclk_g2d_400", }; > @@ -2420,16 +2432,11 @@ static void __init exynos5433_cmu_fsys_init(struct device_node *np) > .nr_clk_ids = G2D_NR_CLK, > .clk_regs = g2d_clk_regs, > .nr_clk_regs = ARRAY_SIZE(g2d_clk_regs), > + .suspend_regs = g2d_suspend_regs, > + .nr_suspend_regs = ARRAY_SIZE(g2d_suspend_regs), > + .clk_name = "aclk_g2d_400", > }; > > -static void __init exynos5433_cmu_g2d_init(struct device_node *np) > -{ > - samsung_cmu_register_one(np, &g2d_cmu_info); > -} > - > -CLK_OF_DECLARE(exynos5433_cmu_g2d, "samsung,exynos5433-cmu-g2d", > - exynos5433_cmu_g2d_init); > - > /* > * Register offset definitions for CMU_DISP > */ > @@ -2494,6 +2501,18 @@ static void __init exynos5433_cmu_g2d_init(struct device_node *np) > CLKOUT_CMU_DISP_DIV_STAT, > }; > > +static const struct samsung_clk_reg_dump disp_suspend_regs[] = { > + /* PLL has to be enabled for suspend */ > + { DISP_PLL_CON0, 0x85f40502 }, > + /* ignore status of external PHY muxes during suspend to avoid hangs */ > + { MUX_IGNORE_DISP2, 0x00111111 }, > + { MUX_SEL_DISP0, 0 }, > + { MUX_SEL_DISP1, 0 }, > + { MUX_SEL_DISP2, 0 }, > + { MUX_SEL_DISP3, 0 }, > + { MUX_SEL_DISP4, 0 }, > +}; > + > /* list of all parent clock list */ > PNAME(mout_disp_pll_p) = { "oscclk", "fout_disp_pll", }; > PNAME(mout_sclk_dsim1_user_p) = { "oscclk", "sclk_dsim1_disp", }; > @@ -2841,16 +2860,11 @@ static void __init exynos5433_cmu_g2d_init(struct device_node *np) > .nr_clk_ids = DISP_NR_CLK, > .clk_regs = disp_clk_regs, > .nr_clk_regs = ARRAY_SIZE(disp_clk_regs), > + .suspend_regs = disp_suspend_regs, > + .nr_suspend_regs = ARRAY_SIZE(disp_suspend_regs), > + .clk_name = "aclk_disp_333", > }; > > -static void __init exynos5433_cmu_disp_init(struct device_node *np) > -{ > - samsung_cmu_register_one(np, &disp_cmu_info); > -} > - > -CLK_OF_DECLARE(exynos5433_cmu_disp, "samsung,exynos5433-cmu-disp", > - exynos5433_cmu_disp_init); > - > /* > * Register offset definitions for CMU_AUD > */ > @@ -2885,6 +2899,11 @@ static void __init exynos5433_cmu_disp_init(struct device_node *np) > ENABLE_IP_AUD1, > }; > > +static const struct samsung_clk_reg_dump aud_suspend_regs[] = { > + { MUX_SEL_AUD0, 0 }, > + { MUX_SEL_AUD1, 0 }, > +}; > + > /* list of all parent clock list */ > PNAME(mout_aud_pll_user_aud_p) = { "oscclk", "fout_aud_pll", }; > PNAME(mout_sclk_aud_pcm_p) = { "mout_aud_pll_user", "ioclk_audiocdclk0",}; > @@ -3011,16 +3030,11 @@ static void __init exynos5433_cmu_disp_init(struct device_node *np) > .nr_clk_ids = AUD_NR_CLK, > .clk_regs = aud_clk_regs, > .nr_clk_regs = ARRAY_SIZE(aud_clk_regs), > + .suspend_regs = aud_suspend_regs, > + .nr_suspend_regs = ARRAY_SIZE(aud_suspend_regs), > + .clk_name = "fout_aud_pll", > }; > > -static void __init exynos5433_cmu_aud_init(struct device_node *np) > -{ > - samsung_cmu_register_one(np, &aud_cmu_info); > -} > -CLK_OF_DECLARE(exynos5433_cmu_aud, "samsung,exynos5433-cmu-aud", > - exynos5433_cmu_aud_init); > - > - > /* > * Register offset definitions for CMU_BUS{0|1|2} > */ > @@ -3222,6 +3236,10 @@ static void __init exynos5433_cmu_aud_init(struct device_node *np) > CLK_STOPCTRL, > }; > > +static const struct samsung_clk_reg_dump g3d_suspend_regs[] = { > + { MUX_SEL_G3D, 0 }, > +}; > + > /* list of all parent clock list */ > PNAME(mout_aclk_g3d_400_p) = { "mout_g3d_pll", "aclk_g3d_400", }; > PNAME(mout_g3d_pll_p) = { "oscclk", "fout_g3d_pll", }; > @@ -3295,15 +3313,11 @@ static void __init exynos5433_cmu_aud_init(struct device_node *np) > .nr_clk_ids = G3D_NR_CLK, > .clk_regs = g3d_clk_regs, > .nr_clk_regs = ARRAY_SIZE(g3d_clk_regs), > + .suspend_regs = g3d_suspend_regs, > + .nr_suspend_regs = ARRAY_SIZE(g3d_suspend_regs), > + .clk_name = "aclk_g3d_400", > }; > > -static void __init exynos5433_cmu_g3d_init(struct device_node *np) > -{ > - samsung_cmu_register_one(np, &g3d_cmu_info); > -} > -CLK_OF_DECLARE(exynos5433_cmu_g3d, "samsung,exynos5433-cmu-g3d", > - exynos5433_cmu_g3d_init); > - > /* > * Register offset definitions for CMU_GSCL > */ > @@ -3342,6 +3356,12 @@ static void __init exynos5433_cmu_g3d_init(struct device_node *np) > ENABLE_IP_GSCL_SECURE_SMMU_GSCL2, > }; > > +static const struct samsung_clk_reg_dump gscl_suspend_regs[] = { > + { MUX_SEL_GSCL, 0 }, > + { ENABLE_ACLK_GSCL, 0xfff }, > + { ENABLE_PCLK_GSCL, 0xff }, > +}; > + > /* list of all parent clock list */ > PNAME(aclk_gscl_111_user_p) = { "oscclk", "aclk_gscl_111", }; > PNAME(aclk_gscl_333_user_p) = { "oscclk", "aclk_gscl_333", }; > @@ -3436,15 +3456,11 @@ static void __init exynos5433_cmu_g3d_init(struct device_node *np) > .nr_clk_ids = GSCL_NR_CLK, > .clk_regs = gscl_clk_regs, > .nr_clk_regs = ARRAY_SIZE(gscl_clk_regs), > + .suspend_regs = gscl_suspend_regs, > + .nr_suspend_regs = ARRAY_SIZE(gscl_suspend_regs), > + .clk_name = "aclk_gscl_111", > }; > > -static void __init exynos5433_cmu_gscl_init(struct device_node *np) > -{ > - samsung_cmu_register_one(np, &gscl_cmu_info); > -} > -CLK_OF_DECLARE(exynos5433_cmu_gscl, "samsung,exynos5433-cmu-gscl", > - exynos5433_cmu_gscl_init); > - > /* > * Register offset definitions for CMU_APOLLO > */ > @@ -3970,6 +3986,11 @@ static void __init exynos5433_cmu_atlas_init(struct device_node *np) > ENABLE_IP_MSCL_SECURE_SMMU_JPEG, > }; > > +static const struct samsung_clk_reg_dump mscl_suspend_regs[] = { > + { MUX_SEL_MSCL0, 0 }, > + { MUX_SEL_MSCL1, 0 }, > +}; > + > /* list of all parent clock list */ > PNAME(mout_sclk_jpeg_user_p) = { "oscclk", "sclk_jpeg_mscl", }; > PNAME(mout_aclk_mscl_400_user_p) = { "oscclk", "aclk_mscl_400", }; > @@ -4082,15 +4103,11 @@ static void __init exynos5433_cmu_atlas_init(struct device_node *np) > .nr_clk_ids = MSCL_NR_CLK, > .clk_regs = mscl_clk_regs, > .nr_clk_regs = ARRAY_SIZE(mscl_clk_regs), > + .suspend_regs = mscl_suspend_regs, > + .nr_suspend_regs = ARRAY_SIZE(mscl_suspend_regs), > + .clk_name = "aclk_mscl_400", > }; > > -static void __init exynos5433_cmu_mscl_init(struct device_node *np) > -{ > - samsung_cmu_register_one(np, &mscl_cmu_info); > -} > -CLK_OF_DECLARE(exynos5433_cmu_mscl, "samsung,exynos5433-cmu-mscl", > - exynos5433_cmu_mscl_init); > - > /* > * Register offset definitions for CMU_MFC > */ > @@ -4120,6 +4137,10 @@ static void __init exynos5433_cmu_mscl_init(struct device_node *np) > ENABLE_IP_MFC_SECURE_SMMU_MFC, > }; > > +static const struct samsung_clk_reg_dump mfc_suspend_regs[] = { > + { MUX_SEL_MFC, 0 }, > +}; > + > PNAME(mout_aclk_mfc_400_user_p) = { "oscclk", "aclk_mfc_400", }; > > static const struct samsung_mux_clock mfc_mux_clks[] __initconst = { > @@ -4190,15 +4211,11 @@ static void __init exynos5433_cmu_mscl_init(struct device_node *np) > .nr_clk_ids = MFC_NR_CLK, > .clk_regs = mfc_clk_regs, > .nr_clk_regs = ARRAY_SIZE(mfc_clk_regs), > + .suspend_regs = mfc_suspend_regs, > + .nr_suspend_regs = ARRAY_SIZE(mfc_suspend_regs), > + .clk_name = "aclk_mfc_400", > }; > > -static void __init exynos5433_cmu_mfc_init(struct device_node *np) > -{ > - samsung_cmu_register_one(np, &mfc_cmu_info); > -} > -CLK_OF_DECLARE(exynos5433_cmu_mfc, "samsung,exynos5433-cmu-mfc", > - exynos5433_cmu_mfc_init); > - > /* > * Register offset definitions for CMU_HEVC > */ > @@ -4228,6 +4245,10 @@ static void __init exynos5433_cmu_mfc_init(struct device_node *np) > ENABLE_IP_HEVC_SECURE_SMMU_HEVC, > }; > > +static const struct samsung_clk_reg_dump hevc_suspend_regs[] = { > + { MUX_SEL_HEVC, 0 }, > +}; > + > PNAME(mout_aclk_hevc_400_user_p) = { "oscclk", "aclk_hevc_400", }; > > static const struct samsung_mux_clock hevc_mux_clks[] __initconst = { > @@ -4300,15 +4321,11 @@ static void __init exynos5433_cmu_mfc_init(struct device_node *np) > .nr_clk_ids = HEVC_NR_CLK, > .clk_regs = hevc_clk_regs, > .nr_clk_regs = ARRAY_SIZE(hevc_clk_regs), > + .suspend_regs = hevc_suspend_regs, > + .nr_suspend_regs = ARRAY_SIZE(hevc_suspend_regs), > + .clk_name = "aclk_hevc_400", > }; > > -static void __init exynos5433_cmu_hevc_init(struct device_node *np) > -{ > - samsung_cmu_register_one(np, &hevc_cmu_info); > -} > -CLK_OF_DECLARE(exynos5433_cmu_hevc, "samsung,exynos5433-cmu-hevc", > - exynos5433_cmu_hevc_init); > - > /* > * Register offset definitions for CMU_ISP > */ > @@ -4342,6 +4359,10 @@ static void __init exynos5433_cmu_hevc_init(struct device_node *np) > ENABLE_IP_ISP3, > }; > > +static const struct samsung_clk_reg_dump isp_suspend_regs[] = { > + { MUX_SEL_ISP, 0 }, > +}; > + > PNAME(mout_aclk_isp_dis_400_user_p) = { "oscclk", "aclk_isp_dis_400", }; > PNAME(mout_aclk_isp_400_user_p) = { "oscclk", "aclk_isp_400", }; > > @@ -4553,15 +4574,11 @@ static void __init exynos5433_cmu_hevc_init(struct device_node *np) > .nr_clk_ids = ISP_NR_CLK, > .clk_regs = isp_clk_regs, > .nr_clk_regs = ARRAY_SIZE(isp_clk_regs), > + .suspend_regs = isp_suspend_regs, > + .nr_suspend_regs = ARRAY_SIZE(isp_suspend_regs), > + .clk_name = "aclk_isp_400", > }; > > -static void __init exynos5433_cmu_isp_init(struct device_node *np) > -{ > - samsung_cmu_register_one(np, &isp_cmu_info); > -} > -CLK_OF_DECLARE(exynos5433_cmu_isp, "samsung,exynos5433-cmu-isp", > - exynos5433_cmu_isp_init); > - > /* > * Register offset definitions for CMU_CAM0 > */ > @@ -4625,6 +4642,15 @@ static void __init exynos5433_cmu_isp_init(struct device_node *np) > ENABLE_IP_CAM02, > ENABLE_IP_CAM03, > }; > + > +static const struct samsung_clk_reg_dump cam0_suspend_regs[] = { > + { MUX_SEL_CAM00, 0 }, > + { MUX_SEL_CAM01, 0 }, > + { MUX_SEL_CAM02, 0 }, > + { MUX_SEL_CAM03, 0 }, > + { MUX_SEL_CAM04, 0 }, > +}; > + > PNAME(mout_aclk_cam0_333_user_p) = { "oscclk", "aclk_cam0_333", }; > PNAME(mout_aclk_cam0_400_user_p) = { "oscclk", "aclk_cam0_400", }; > PNAME(mout_aclk_cam0_552_user_p) = { "oscclk", "aclk_cam0_552", }; > @@ -5030,15 +5056,11 @@ static void __init exynos5433_cmu_isp_init(struct device_node *np) > .nr_clk_ids = CAM0_NR_CLK, > .clk_regs = cam0_clk_regs, > .nr_clk_regs = ARRAY_SIZE(cam0_clk_regs), > + .suspend_regs = cam0_suspend_regs, > + .nr_suspend_regs = ARRAY_SIZE(cam0_suspend_regs), > + .clk_name = "aclk_cam0_400", > }; > > -static void __init exynos5433_cmu_cam0_init(struct device_node *np) > -{ > - samsung_cmu_register_one(np, &cam0_cmu_info); > -} > -CLK_OF_DECLARE(exynos5433_cmu_cam0, "samsung,exynos5433-cmu-cam0", > - exynos5433_cmu_cam0_init); > - > /* > * Register offset definitions for CMU_CAM1 > */ > @@ -5085,6 +5107,12 @@ static void __init exynos5433_cmu_cam0_init(struct device_node *np) > ENABLE_IP_CAM12, > }; > > +static const struct samsung_clk_reg_dump cam1_suspend_regs[] = { > + { MUX_SEL_CAM10, 0 }, > + { MUX_SEL_CAM11, 0 }, > + { MUX_SEL_CAM12, 0 }, > +}; > + > PNAME(mout_sclk_isp_uart_user_p) = { "oscclk", "sclk_isp_uart_cam1", }; > PNAME(mout_sclk_isp_spi1_user_p) = { "oscclk", "sclk_isp_spi1_cam1", }; > PNAME(mout_sclk_isp_spi0_user_p) = { "oscclk", "sclk_isp_spi0_cam1", }; > @@ -5403,11 +5431,226 @@ static void __init exynos5433_cmu_cam0_init(struct device_node *np) > .nr_clk_ids = CAM1_NR_CLK, > .clk_regs = cam1_clk_regs, > .nr_clk_regs = ARRAY_SIZE(cam1_clk_regs), > + .suspend_regs = cam1_suspend_regs, > + .nr_suspend_regs = ARRAY_SIZE(cam1_suspend_regs), > + .clk_name = "aclk_cam1_400", > +}; > + > + > +struct exynos5433_cmu_data { > + struct samsung_clk_provider ctx; > + > + struct samsung_clk_reg_dump *clk_save; > + unsigned int nr_clk_save; > + const struct samsung_clk_reg_dump *clk_suspend; > + unsigned int nr_clk_suspend; > + > + struct clk *clk; > + struct clk **pclks; > + int nr_pclks; > +}; > + > +static int exynos5433_cmu_suspend(struct device *dev) > +{ > + struct exynos5433_cmu_data *data = dev_get_drvdata(dev); > + int i; > + > + samsung_clk_save(data->ctx.reg_base, data->clk_save, > + data->nr_clk_save); > + > + for (i = 0; i < data->nr_pclks; i++) > + clk_prepare_enable(data->pclks[i]); > + > + samsung_clk_restore(data->ctx.reg_base, data->clk_suspend, > + data->nr_clk_suspend); > + > + for (i = 0; i < data->nr_pclks; i++) > + clk_disable_unprepare(data->pclks[i]); > + > + clk_disable_unprepare(data->clk); > + > + return 0; > +} > + > +static int exynos5433_cmu_resume(struct device *dev) > +{ > + struct exynos5433_cmu_data *data = dev_get_drvdata(dev); > + int i; > + > + clk_prepare_enable(data->clk); > + > + for (i = 0; i < data->nr_pclks; i++) > + clk_prepare_enable(data->pclks[i]); > + > + samsung_clk_restore(data->ctx.reg_base, data->clk_save, > + data->nr_clk_save); > + > + for (i = 0; i < data->nr_pclks; i++) > + clk_disable_unprepare(data->pclks[i]); > + > + return 0; > +} > + > +static int __init exynos5433_cmu_probe(struct platform_device *pdev) > +{ > + const struct samsung_cmu_info *info; > + struct exynos5433_cmu_data *data; > + struct samsung_clk_provider *ctx; > + struct device *dev = &pdev->dev; > + struct resource *res; > + void __iomem *reg_base; > + struct clk **clk_table; > + int i; > + > + info = of_device_get_match_data(dev); > + > + data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL); > + if (!data) > + return -ENOMEM; > + ctx = &data->ctx; > + > + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); > + reg_base = devm_ioremap_resource(dev, res); > + if (IS_ERR(reg_base)) { > + dev_err(dev, "failed to map registers\n"); > + return PTR_ERR(reg_base); > + } > + > + clk_table = devm_kcalloc(dev, info->nr_clk_ids, sizeof(struct clk *), > + GFP_KERNEL); > + if (!clk_table) > + return -ENOMEM; > + > + for (i = 0; i < info->nr_clk_ids; ++i) > + clk_table[i] = ERR_PTR(-ENOENT); > + > + ctx->clk_data.clks = clk_table; > + ctx->clk_data.clk_num = info->nr_clk_ids; > + ctx->reg_base = reg_base; > + ctx->dev = dev; > + spin_lock_init(&ctx->lock); > + > + data->clk_save = samsung_clk_alloc_reg_dump(info->clk_regs, > + info->nr_clk_regs); > + data->nr_clk_save = info->nr_clk_regs; > + data->clk_suspend = info->suspend_regs; > + data->nr_clk_suspend = info->nr_suspend_regs; > + data->nr_pclks = of_count_phandle_with_args(dev->of_node, "clocks", > + "#clock-cells"); > + if (data->nr_pclks > 0) { > + data->pclks = devm_kcalloc(dev, sizeof(struct clk *), > + data->nr_pclks, GFP_KERNEL); > + > + for (i = 0; i < data->nr_pclks; i++) { > + struct clk *clk = of_clk_get(dev->of_node, i); > + > + if (IS_ERR(clk)) > + return PTR_ERR(clk); > + data->pclks[i] = clk; > + } > + } > + > + if (info->clk_name) > + data->clk = clk_get(dev, info->clk_name); > + clk_prepare_enable(data->clk); > + > + platform_set_drvdata(pdev, data); > + > + /* > + * Enable runtime pm here, so clock core with use runtime pm for all > + * registered clocks. Additionally we increase the runtime PM usage > + * count during the clock registration, to avoid the clock core from > + * runtime suspending the device. > + */ > + pm_runtime_get_noresume(dev); > + pm_runtime_set_active(dev); > + pm_runtime_enable(dev); > + > + if (info->pll_clks) > + samsung_clk_register_pll(ctx, info->pll_clks, info->nr_pll_clks, > + reg_base); > + if (info->mux_clks) > + samsung_clk_register_mux(ctx, info->mux_clks, > + info->nr_mux_clks); > + if (info->div_clks) > + samsung_clk_register_div(ctx, info->div_clks, > + info->nr_div_clks); > + if (info->gate_clks) > + samsung_clk_register_gate(ctx, info->gate_clks, > + info->nr_gate_clks); > + if (info->fixed_clks) > + samsung_clk_register_fixed_rate(ctx, info->fixed_clks, > + info->nr_fixed_clks); > + if (info->fixed_factor_clks) > + samsung_clk_register_fixed_factor(ctx, info->fixed_factor_clks, > + info->nr_fixed_factor_clks); > + > + samsung_clk_of_add_provider(dev->of_node, ctx); > + pm_runtime_put_sync(dev); > + > + return 0; > +} > + > +static const struct of_device_id exynos5433_cmu_of_match[] = { > + { > + .compatible = "samsung,exynos5433-cmu-aud", > + .data = &aud_cmu_info, > + }, { > + .compatible = "samsung,exynos5433-cmu-cam0", > + .data = &cam0_cmu_info, > + }, { > + .compatible = "samsung,exynos5433-cmu-cam1", > + .data = &cam1_cmu_info, > + }, { > + .compatible = "samsung,exynos5433-cmu-disp", > + .data = &disp_cmu_info, > + }, { > + .compatible = "samsung,exynos5433-cmu-g2d", > + .data = &g2d_cmu_info, > + }, { > + .compatible = "samsung,exynos5433-cmu-g3d", > + .data = &g3d_cmu_info, > + }, { > + .compatible = "samsung,exynos5433-cmu-fsys", > + .data = &fsys_cmu_info, > + }, { > + .compatible = "samsung,exynos5433-cmu-gscl", > + .data = &gscl_cmu_info, > + }, { > + .compatible = "samsung,exynos5433-cmu-mfc", > + .data = &mfc_cmu_info, > + }, { > + .compatible = "samsung,exynos5433-cmu-hevc", > + .data = &hevc_cmu_info, > + }, { > + .compatible = "samsung,exynos5433-cmu-isp", > + .data = &isp_cmu_info, > + }, { > + .compatible = "samsung,exynos5433-cmu-mscl", > + .data = &mscl_cmu_info, > + }, { > + }, > +}; > + > +static const struct dev_pm_ops exynos5433_cmu_pm_ops = { > + SET_RUNTIME_PM_OPS(exynos5433_cmu_suspend, exynos5433_cmu_resume, > + NULL) > + SET_LATE_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, > + pm_runtime_force_resume) > +}; > + > +static struct platform_driver exynos5433_cmu_driver __refdata = { > + .driver = { > + .name = "exynos5433-cmu", > + .of_match_table = exynos5433_cmu_of_match, > + .suppress_bind_attrs = true, > + .pm = &exynos5433_cmu_pm_ops, > + }, > + .probe = exynos5433_cmu_probe, > }; > > -static void __init exynos5433_cmu_cam1_init(struct device_node *np) > +static int __init exynos5433_cmu_init(void) > { > - samsung_cmu_register_one(np, &cam1_cmu_info); > + return platform_driver_register(&exynos5433_cmu_driver); > } > -CLK_OF_DECLARE(exynos5433_cmu_cam1, "samsung,exynos5433-cmu-cam1", > - exynos5433_cmu_cam1_init); > +core_initcall(exynos5433_cmu_init); > diff --git a/drivers/clk/samsung/clk.h b/drivers/clk/samsung/clk.h > index 9263d8a27c6b..664020cb4794 100644 > --- a/drivers/clk/samsung/clk.h > +++ b/drivers/clk/samsung/clk.h > @@ -354,6 +354,12 @@ struct samsung_cmu_info { > /* list and number of clocks registers */ > const unsigned long *clk_regs; > unsigned int nr_clk_regs; > + > + /* list and number of clocks registers to set before suspend */ > + const struct samsung_clk_reg_dump *suspend_regs; > + unsigned int nr_suspend_regs; > + /* name of the parent clock needed for CMU register access */ > + const char *clk_name; > }; > > extern struct samsung_clk_provider *__init samsung_clk_init( > -- > 1.9.1 > -- To unsubscribe from this list: send the line "unsubscribe linux-clk" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On 03/22/2017 12:35 PM, Marek Szyprowski wrote: > +static int __init exynos5433_cmu_probe(struct platform_device *pdev) > +{ > + /* > + * Enable runtime pm here, so clock core with use runtime pm for all > + * registered clocks. Additionally we increase the runtime PM usage > + * count during the clock registration, to avoid the clock core from > + * runtime suspending the device. > + */ While applying I rephrased the above comment to: /* * Enable runtime PM here to allow the clock core using runtime PM * for the registered clocks. Additionally, we increase the runtime * PM usage count before registering the clocks, to prevent the * clock core from runtime suspending the device. */ > + pm_runtime_get_noresume(dev); > + pm_runtime_set_active(dev); > + pm_runtime_enable(dev);
diff --git a/Documentation/devicetree/bindings/clock/exynos5433-clock.txt b/Documentation/devicetree/bindings/clock/exynos5433-clock.txt index 1dc80f8811fe..5c7dd12e667a 100644 --- a/Documentation/devicetree/bindings/clock/exynos5433-clock.txt +++ b/Documentation/devicetree/bindings/clock/exynos5433-clock.txt @@ -168,6 +168,11 @@ Required Properties: - aclk_cam1_400 - aclk_cam1_552 +Optional properties: + - power-domains: a phandle to respective power domain node as described by + generic PM domain bindings (see power/power_domain.txt for more + information). + Each clock is assigned an identifier and client nodes can use this identifier to specify the clock which they consume. @@ -270,6 +275,7 @@ Example 2: Examples of clock controller nodes are listed below. clocks = <&xxti>, <&cmu_top CLK_ACLK_G2D_266>, <&cmu_top CLK_ACLK_G2D_400>; + power-domains = <&pd_g2d>; }; cmu_disp: clock-controller@13b90000 { @@ -295,6 +301,7 @@ Example 2: Examples of clock controller nodes are listed below. <&cmu_mif CLK_SCLK_DECON_ECLK_DISP>, <&cmu_mif CLK_SCLK_DECON_TV_VCLK_DISP>, <&cmu_mif CLK_ACLK_DISP_333>; + power-domains = <&pd_disp>; }; cmu_aud: clock-controller@114c0000 { @@ -304,6 +311,7 @@ Example 2: Examples of clock controller nodes are listed below. clock-names = "oscclk", "fout_aud_pll"; clocks = <&xxti>, <&cmu_top CLK_FOUT_AUD_PLL>; + power-domains = <&pd_aud>; }; cmu_bus0: clock-controller@13600000 { @@ -340,6 +348,7 @@ Example 2: Examples of clock controller nodes are listed below. clock-names = "oscclk", "aclk_g3d_400"; clocks = <&xxti>, <&cmu_top CLK_ACLK_G3D_400>; + power-domains = <&pd_g3d>; }; cmu_gscl: clock-controller@13cf0000 { @@ -353,6 +362,7 @@ Example 2: Examples of clock controller nodes are listed below. clocks = <&xxti>, <&cmu_top CLK_ACLK_GSCL_111>, <&cmu_top CLK_ACLK_GSCL_333>; + power-domains = <&pd_gscl>; }; cmu_apollo: clock-controller@11900000 { @@ -384,6 +394,7 @@ Example 2: Examples of clock controller nodes are listed below. clocks = <&xxti>, <&cmu_top CLK_SCLK_JPEG_MSCL>, <&cmu_top CLK_ACLK_MSCL_400>; + power-domains = <&pd_mscl>; }; cmu_mfc: clock-controller@15280000 { @@ -393,6 +404,7 @@ Example 2: Examples of clock controller nodes are listed below. clock-names = "oscclk", "aclk_mfc_400"; clocks = <&xxti>, <&cmu_top CLK_ACLK_MFC_400>; + power-domains = <&pd_mfc>; }; cmu_hevc: clock-controller@14f80000 { @@ -402,6 +414,7 @@ Example 2: Examples of clock controller nodes are listed below. clock-names = "oscclk", "aclk_hevc_400"; clocks = <&xxti>, <&cmu_top CLK_ACLK_HEVC_400>; + power-domains = <&pd_hevc>; }; cmu_isp: clock-controller@146d0000 { @@ -415,6 +428,7 @@ Example 2: Examples of clock controller nodes are listed below. clocks = <&xxti>, <&cmu_top CLK_ACLK_ISP_DIS_400>, <&cmu_top CLK_ACLK_ISP_400>; + power-domains = <&pd_isp>; }; cmu_cam0: clock-controller@120d0000 { @@ -430,6 +444,7 @@ Example 2: Examples of clock controller nodes are listed below. <&cmu_top CLK_ACLK_CAM0_333>, <&cmu_top CLK_ACLK_CAM0_400>, <&cmu_top CLK_ACLK_CAM0_552>; + power-domains = <&pd_cam0>; }; cmu_cam1: clock-controller@145d0000 { @@ -451,6 +466,7 @@ Example 2: Examples of clock controller nodes are listed below. <&cmu_top CLK_ACLK_CAM1_333>, <&cmu_top CLK_ACLK_CAM1_400>, <&cmu_top CLK_ACLK_CAM1_552>; + power-domains = <&pd_cam1>; }; Example 3: UART controller node that consumes the clock generated by the clock diff --git a/drivers/clk/samsung/clk-exynos5433.c b/drivers/clk/samsung/clk-exynos5433.c index 11343a597093..a0d88ce948d7 100644 --- a/drivers/clk/samsung/clk-exynos5433.c +++ b/drivers/clk/samsung/clk-exynos5433.c @@ -9,9 +9,14 @@ * Common Clock Framework support for Exynos5433 SoC. */ +#include <linux/clk.h> #include <linux/clk-provider.h> #include <linux/of.h> #include <linux/of_address.h> +#include <linux/of_device.h> +#include <linux/platform_device.h> +#include <linux/pm_runtime.h> +#include <linux/slab.h> #include <dt-bindings/clock/exynos5433.h> @@ -1991,6 +1996,14 @@ static void __init exynos5433_cmu_peris_init(struct device_node *np) ENABLE_IP_FSYS1, }; +static const struct samsung_clk_reg_dump fsys_suspend_regs[] = { + { MUX_SEL_FSYS0, 0 }, + { MUX_SEL_FSYS1, 0 }, + { MUX_SEL_FSYS2, 0 }, + { MUX_SEL_FSYS3, 0 }, + { MUX_SEL_FSYS4, 0 }, +}; + static const struct samsung_fixed_rate_clock fsys_fixed_clks[] __initconst = { /* PHY clocks from USBDRD30_PHY */ FRATE(CLK_PHYCLK_USBDRD30_UDRD30_PHYCLOCK_PHY, @@ -2296,16 +2309,11 @@ static void __init exynos5433_cmu_peris_init(struct device_node *np) .nr_clk_ids = FSYS_NR_CLK, .clk_regs = fsys_clk_regs, .nr_clk_regs = ARRAY_SIZE(fsys_clk_regs), + .suspend_regs = fsys_suspend_regs, + .nr_suspend_regs = ARRAY_SIZE(fsys_suspend_regs), + .clk_name = "aclk_fsys_200", }; -static void __init exynos5433_cmu_fsys_init(struct device_node *np) -{ - samsung_cmu_register_one(np, &fsys_cmu_info); -} - -CLK_OF_DECLARE(exynos5433_cmu_fsys, "samsung,exynos5433-cmu-fsys", - exynos5433_cmu_fsys_init); - /* * Register offset definitions for CMU_G2D */ @@ -2335,6 +2343,10 @@ static void __init exynos5433_cmu_fsys_init(struct device_node *np) DIV_ENABLE_IP_G2D_SECURE_SMMU_G2D, }; +static const struct samsung_clk_reg_dump g2d_suspend_regs[] = { + { MUX_SEL_G2D0, 0 }, +}; + /* list of all parent clock list */ PNAME(mout_aclk_g2d_266_user_p) = { "oscclk", "aclk_g2d_266", }; PNAME(mout_aclk_g2d_400_user_p) = { "oscclk", "aclk_g2d_400", }; @@ -2420,16 +2432,11 @@ static void __init exynos5433_cmu_fsys_init(struct device_node *np) .nr_clk_ids = G2D_NR_CLK, .clk_regs = g2d_clk_regs, .nr_clk_regs = ARRAY_SIZE(g2d_clk_regs), + .suspend_regs = g2d_suspend_regs, + .nr_suspend_regs = ARRAY_SIZE(g2d_suspend_regs), + .clk_name = "aclk_g2d_400", }; -static void __init exynos5433_cmu_g2d_init(struct device_node *np) -{ - samsung_cmu_register_one(np, &g2d_cmu_info); -} - -CLK_OF_DECLARE(exynos5433_cmu_g2d, "samsung,exynos5433-cmu-g2d", - exynos5433_cmu_g2d_init); - /* * Register offset definitions for CMU_DISP */ @@ -2494,6 +2501,18 @@ static void __init exynos5433_cmu_g2d_init(struct device_node *np) CLKOUT_CMU_DISP_DIV_STAT, }; +static const struct samsung_clk_reg_dump disp_suspend_regs[] = { + /* PLL has to be enabled for suspend */ + { DISP_PLL_CON0, 0x85f40502 }, + /* ignore status of external PHY muxes during suspend to avoid hangs */ + { MUX_IGNORE_DISP2, 0x00111111 }, + { MUX_SEL_DISP0, 0 }, + { MUX_SEL_DISP1, 0 }, + { MUX_SEL_DISP2, 0 }, + { MUX_SEL_DISP3, 0 }, + { MUX_SEL_DISP4, 0 }, +}; + /* list of all parent clock list */ PNAME(mout_disp_pll_p) = { "oscclk", "fout_disp_pll", }; PNAME(mout_sclk_dsim1_user_p) = { "oscclk", "sclk_dsim1_disp", }; @@ -2841,16 +2860,11 @@ static void __init exynos5433_cmu_g2d_init(struct device_node *np) .nr_clk_ids = DISP_NR_CLK, .clk_regs = disp_clk_regs, .nr_clk_regs = ARRAY_SIZE(disp_clk_regs), + .suspend_regs = disp_suspend_regs, + .nr_suspend_regs = ARRAY_SIZE(disp_suspend_regs), + .clk_name = "aclk_disp_333", }; -static void __init exynos5433_cmu_disp_init(struct device_node *np) -{ - samsung_cmu_register_one(np, &disp_cmu_info); -} - -CLK_OF_DECLARE(exynos5433_cmu_disp, "samsung,exynos5433-cmu-disp", - exynos5433_cmu_disp_init); - /* * Register offset definitions for CMU_AUD */ @@ -2885,6 +2899,11 @@ static void __init exynos5433_cmu_disp_init(struct device_node *np) ENABLE_IP_AUD1, }; +static const struct samsung_clk_reg_dump aud_suspend_regs[] = { + { MUX_SEL_AUD0, 0 }, + { MUX_SEL_AUD1, 0 }, +}; + /* list of all parent clock list */ PNAME(mout_aud_pll_user_aud_p) = { "oscclk", "fout_aud_pll", }; PNAME(mout_sclk_aud_pcm_p) = { "mout_aud_pll_user", "ioclk_audiocdclk0",}; @@ -3011,16 +3030,11 @@ static void __init exynos5433_cmu_disp_init(struct device_node *np) .nr_clk_ids = AUD_NR_CLK, .clk_regs = aud_clk_regs, .nr_clk_regs = ARRAY_SIZE(aud_clk_regs), + .suspend_regs = aud_suspend_regs, + .nr_suspend_regs = ARRAY_SIZE(aud_suspend_regs), + .clk_name = "fout_aud_pll", }; -static void __init exynos5433_cmu_aud_init(struct device_node *np) -{ - samsung_cmu_register_one(np, &aud_cmu_info); -} -CLK_OF_DECLARE(exynos5433_cmu_aud, "samsung,exynos5433-cmu-aud", - exynos5433_cmu_aud_init); - - /* * Register offset definitions for CMU_BUS{0|1|2} */ @@ -3222,6 +3236,10 @@ static void __init exynos5433_cmu_aud_init(struct device_node *np) CLK_STOPCTRL, }; +static const struct samsung_clk_reg_dump g3d_suspend_regs[] = { + { MUX_SEL_G3D, 0 }, +}; + /* list of all parent clock list */ PNAME(mout_aclk_g3d_400_p) = { "mout_g3d_pll", "aclk_g3d_400", }; PNAME(mout_g3d_pll_p) = { "oscclk", "fout_g3d_pll", }; @@ -3295,15 +3313,11 @@ static void __init exynos5433_cmu_aud_init(struct device_node *np) .nr_clk_ids = G3D_NR_CLK, .clk_regs = g3d_clk_regs, .nr_clk_regs = ARRAY_SIZE(g3d_clk_regs), + .suspend_regs = g3d_suspend_regs, + .nr_suspend_regs = ARRAY_SIZE(g3d_suspend_regs), + .clk_name = "aclk_g3d_400", }; -static void __init exynos5433_cmu_g3d_init(struct device_node *np) -{ - samsung_cmu_register_one(np, &g3d_cmu_info); -} -CLK_OF_DECLARE(exynos5433_cmu_g3d, "samsung,exynos5433-cmu-g3d", - exynos5433_cmu_g3d_init); - /* * Register offset definitions for CMU_GSCL */ @@ -3342,6 +3356,12 @@ static void __init exynos5433_cmu_g3d_init(struct device_node *np) ENABLE_IP_GSCL_SECURE_SMMU_GSCL2, }; +static const struct samsung_clk_reg_dump gscl_suspend_regs[] = { + { MUX_SEL_GSCL, 0 }, + { ENABLE_ACLK_GSCL, 0xfff }, + { ENABLE_PCLK_GSCL, 0xff }, +}; + /* list of all parent clock list */ PNAME(aclk_gscl_111_user_p) = { "oscclk", "aclk_gscl_111", }; PNAME(aclk_gscl_333_user_p) = { "oscclk", "aclk_gscl_333", }; @@ -3436,15 +3456,11 @@ static void __init exynos5433_cmu_g3d_init(struct device_node *np) .nr_clk_ids = GSCL_NR_CLK, .clk_regs = gscl_clk_regs, .nr_clk_regs = ARRAY_SIZE(gscl_clk_regs), + .suspend_regs = gscl_suspend_regs, + .nr_suspend_regs = ARRAY_SIZE(gscl_suspend_regs), + .clk_name = "aclk_gscl_111", }; -static void __init exynos5433_cmu_gscl_init(struct device_node *np) -{ - samsung_cmu_register_one(np, &gscl_cmu_info); -} -CLK_OF_DECLARE(exynos5433_cmu_gscl, "samsung,exynos5433-cmu-gscl", - exynos5433_cmu_gscl_init); - /* * Register offset definitions for CMU_APOLLO */ @@ -3970,6 +3986,11 @@ static void __init exynos5433_cmu_atlas_init(struct device_node *np) ENABLE_IP_MSCL_SECURE_SMMU_JPEG, }; +static const struct samsung_clk_reg_dump mscl_suspend_regs[] = { + { MUX_SEL_MSCL0, 0 }, + { MUX_SEL_MSCL1, 0 }, +}; + /* list of all parent clock list */ PNAME(mout_sclk_jpeg_user_p) = { "oscclk", "sclk_jpeg_mscl", }; PNAME(mout_aclk_mscl_400_user_p) = { "oscclk", "aclk_mscl_400", }; @@ -4082,15 +4103,11 @@ static void __init exynos5433_cmu_atlas_init(struct device_node *np) .nr_clk_ids = MSCL_NR_CLK, .clk_regs = mscl_clk_regs, .nr_clk_regs = ARRAY_SIZE(mscl_clk_regs), + .suspend_regs = mscl_suspend_regs, + .nr_suspend_regs = ARRAY_SIZE(mscl_suspend_regs), + .clk_name = "aclk_mscl_400", }; -static void __init exynos5433_cmu_mscl_init(struct device_node *np) -{ - samsung_cmu_register_one(np, &mscl_cmu_info); -} -CLK_OF_DECLARE(exynos5433_cmu_mscl, "samsung,exynos5433-cmu-mscl", - exynos5433_cmu_mscl_init); - /* * Register offset definitions for CMU_MFC */ @@ -4120,6 +4137,10 @@ static void __init exynos5433_cmu_mscl_init(struct device_node *np) ENABLE_IP_MFC_SECURE_SMMU_MFC, }; +static const struct samsung_clk_reg_dump mfc_suspend_regs[] = { + { MUX_SEL_MFC, 0 }, +}; + PNAME(mout_aclk_mfc_400_user_p) = { "oscclk", "aclk_mfc_400", }; static const struct samsung_mux_clock mfc_mux_clks[] __initconst = { @@ -4190,15 +4211,11 @@ static void __init exynos5433_cmu_mscl_init(struct device_node *np) .nr_clk_ids = MFC_NR_CLK, .clk_regs = mfc_clk_regs, .nr_clk_regs = ARRAY_SIZE(mfc_clk_regs), + .suspend_regs = mfc_suspend_regs, + .nr_suspend_regs = ARRAY_SIZE(mfc_suspend_regs), + .clk_name = "aclk_mfc_400", }; -static void __init exynos5433_cmu_mfc_init(struct device_node *np) -{ - samsung_cmu_register_one(np, &mfc_cmu_info); -} -CLK_OF_DECLARE(exynos5433_cmu_mfc, "samsung,exynos5433-cmu-mfc", - exynos5433_cmu_mfc_init); - /* * Register offset definitions for CMU_HEVC */ @@ -4228,6 +4245,10 @@ static void __init exynos5433_cmu_mfc_init(struct device_node *np) ENABLE_IP_HEVC_SECURE_SMMU_HEVC, }; +static const struct samsung_clk_reg_dump hevc_suspend_regs[] = { + { MUX_SEL_HEVC, 0 }, +}; + PNAME(mout_aclk_hevc_400_user_p) = { "oscclk", "aclk_hevc_400", }; static const struct samsung_mux_clock hevc_mux_clks[] __initconst = { @@ -4300,15 +4321,11 @@ static void __init exynos5433_cmu_mfc_init(struct device_node *np) .nr_clk_ids = HEVC_NR_CLK, .clk_regs = hevc_clk_regs, .nr_clk_regs = ARRAY_SIZE(hevc_clk_regs), + .suspend_regs = hevc_suspend_regs, + .nr_suspend_regs = ARRAY_SIZE(hevc_suspend_regs), + .clk_name = "aclk_hevc_400", }; -static void __init exynos5433_cmu_hevc_init(struct device_node *np) -{ - samsung_cmu_register_one(np, &hevc_cmu_info); -} -CLK_OF_DECLARE(exynos5433_cmu_hevc, "samsung,exynos5433-cmu-hevc", - exynos5433_cmu_hevc_init); - /* * Register offset definitions for CMU_ISP */ @@ -4342,6 +4359,10 @@ static void __init exynos5433_cmu_hevc_init(struct device_node *np) ENABLE_IP_ISP3, }; +static const struct samsung_clk_reg_dump isp_suspend_regs[] = { + { MUX_SEL_ISP, 0 }, +}; + PNAME(mout_aclk_isp_dis_400_user_p) = { "oscclk", "aclk_isp_dis_400", }; PNAME(mout_aclk_isp_400_user_p) = { "oscclk", "aclk_isp_400", }; @@ -4553,15 +4574,11 @@ static void __init exynos5433_cmu_hevc_init(struct device_node *np) .nr_clk_ids = ISP_NR_CLK, .clk_regs = isp_clk_regs, .nr_clk_regs = ARRAY_SIZE(isp_clk_regs), + .suspend_regs = isp_suspend_regs, + .nr_suspend_regs = ARRAY_SIZE(isp_suspend_regs), + .clk_name = "aclk_isp_400", }; -static void __init exynos5433_cmu_isp_init(struct device_node *np) -{ - samsung_cmu_register_one(np, &isp_cmu_info); -} -CLK_OF_DECLARE(exynos5433_cmu_isp, "samsung,exynos5433-cmu-isp", - exynos5433_cmu_isp_init); - /* * Register offset definitions for CMU_CAM0 */ @@ -4625,6 +4642,15 @@ static void __init exynos5433_cmu_isp_init(struct device_node *np) ENABLE_IP_CAM02, ENABLE_IP_CAM03, }; + +static const struct samsung_clk_reg_dump cam0_suspend_regs[] = { + { MUX_SEL_CAM00, 0 }, + { MUX_SEL_CAM01, 0 }, + { MUX_SEL_CAM02, 0 }, + { MUX_SEL_CAM03, 0 }, + { MUX_SEL_CAM04, 0 }, +}; + PNAME(mout_aclk_cam0_333_user_p) = { "oscclk", "aclk_cam0_333", }; PNAME(mout_aclk_cam0_400_user_p) = { "oscclk", "aclk_cam0_400", }; PNAME(mout_aclk_cam0_552_user_p) = { "oscclk", "aclk_cam0_552", }; @@ -5030,15 +5056,11 @@ static void __init exynos5433_cmu_isp_init(struct device_node *np) .nr_clk_ids = CAM0_NR_CLK, .clk_regs = cam0_clk_regs, .nr_clk_regs = ARRAY_SIZE(cam0_clk_regs), + .suspend_regs = cam0_suspend_regs, + .nr_suspend_regs = ARRAY_SIZE(cam0_suspend_regs), + .clk_name = "aclk_cam0_400", }; -static void __init exynos5433_cmu_cam0_init(struct device_node *np) -{ - samsung_cmu_register_one(np, &cam0_cmu_info); -} -CLK_OF_DECLARE(exynos5433_cmu_cam0, "samsung,exynos5433-cmu-cam0", - exynos5433_cmu_cam0_init); - /* * Register offset definitions for CMU_CAM1 */ @@ -5085,6 +5107,12 @@ static void __init exynos5433_cmu_cam0_init(struct device_node *np) ENABLE_IP_CAM12, }; +static const struct samsung_clk_reg_dump cam1_suspend_regs[] = { + { MUX_SEL_CAM10, 0 }, + { MUX_SEL_CAM11, 0 }, + { MUX_SEL_CAM12, 0 }, +}; + PNAME(mout_sclk_isp_uart_user_p) = { "oscclk", "sclk_isp_uart_cam1", }; PNAME(mout_sclk_isp_spi1_user_p) = { "oscclk", "sclk_isp_spi1_cam1", }; PNAME(mout_sclk_isp_spi0_user_p) = { "oscclk", "sclk_isp_spi0_cam1", }; @@ -5403,11 +5431,226 @@ static void __init exynos5433_cmu_cam0_init(struct device_node *np) .nr_clk_ids = CAM1_NR_CLK, .clk_regs = cam1_clk_regs, .nr_clk_regs = ARRAY_SIZE(cam1_clk_regs), + .suspend_regs = cam1_suspend_regs, + .nr_suspend_regs = ARRAY_SIZE(cam1_suspend_regs), + .clk_name = "aclk_cam1_400", +}; + + +struct exynos5433_cmu_data { + struct samsung_clk_provider ctx; + + struct samsung_clk_reg_dump *clk_save; + unsigned int nr_clk_save; + const struct samsung_clk_reg_dump *clk_suspend; + unsigned int nr_clk_suspend; + + struct clk *clk; + struct clk **pclks; + int nr_pclks; +}; + +static int exynos5433_cmu_suspend(struct device *dev) +{ + struct exynos5433_cmu_data *data = dev_get_drvdata(dev); + int i; + + samsung_clk_save(data->ctx.reg_base, data->clk_save, + data->nr_clk_save); + + for (i = 0; i < data->nr_pclks; i++) + clk_prepare_enable(data->pclks[i]); + + samsung_clk_restore(data->ctx.reg_base, data->clk_suspend, + data->nr_clk_suspend); + + for (i = 0; i < data->nr_pclks; i++) + clk_disable_unprepare(data->pclks[i]); + + clk_disable_unprepare(data->clk); + + return 0; +} + +static int exynos5433_cmu_resume(struct device *dev) +{ + struct exynos5433_cmu_data *data = dev_get_drvdata(dev); + int i; + + clk_prepare_enable(data->clk); + + for (i = 0; i < data->nr_pclks; i++) + clk_prepare_enable(data->pclks[i]); + + samsung_clk_restore(data->ctx.reg_base, data->clk_save, + data->nr_clk_save); + + for (i = 0; i < data->nr_pclks; i++) + clk_disable_unprepare(data->pclks[i]); + + return 0; +} + +static int __init exynos5433_cmu_probe(struct platform_device *pdev) +{ + const struct samsung_cmu_info *info; + struct exynos5433_cmu_data *data; + struct samsung_clk_provider *ctx; + struct device *dev = &pdev->dev; + struct resource *res; + void __iomem *reg_base; + struct clk **clk_table; + int i; + + info = of_device_get_match_data(dev); + + data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL); + if (!data) + return -ENOMEM; + ctx = &data->ctx; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + reg_base = devm_ioremap_resource(dev, res); + if (IS_ERR(reg_base)) { + dev_err(dev, "failed to map registers\n"); + return PTR_ERR(reg_base); + } + + clk_table = devm_kcalloc(dev, info->nr_clk_ids, sizeof(struct clk *), + GFP_KERNEL); + if (!clk_table) + return -ENOMEM; + + for (i = 0; i < info->nr_clk_ids; ++i) + clk_table[i] = ERR_PTR(-ENOENT); + + ctx->clk_data.clks = clk_table; + ctx->clk_data.clk_num = info->nr_clk_ids; + ctx->reg_base = reg_base; + ctx->dev = dev; + spin_lock_init(&ctx->lock); + + data->clk_save = samsung_clk_alloc_reg_dump(info->clk_regs, + info->nr_clk_regs); + data->nr_clk_save = info->nr_clk_regs; + data->clk_suspend = info->suspend_regs; + data->nr_clk_suspend = info->nr_suspend_regs; + data->nr_pclks = of_count_phandle_with_args(dev->of_node, "clocks", + "#clock-cells"); + if (data->nr_pclks > 0) { + data->pclks = devm_kcalloc(dev, sizeof(struct clk *), + data->nr_pclks, GFP_KERNEL); + + for (i = 0; i < data->nr_pclks; i++) { + struct clk *clk = of_clk_get(dev->of_node, i); + + if (IS_ERR(clk)) + return PTR_ERR(clk); + data->pclks[i] = clk; + } + } + + if (info->clk_name) + data->clk = clk_get(dev, info->clk_name); + clk_prepare_enable(data->clk); + + platform_set_drvdata(pdev, data); + + /* + * Enable runtime pm here, so clock core with use runtime pm for all + * registered clocks. Additionally we increase the runtime PM usage + * count during the clock registration, to avoid the clock core from + * runtime suspending the device. + */ + pm_runtime_get_noresume(dev); + pm_runtime_set_active(dev); + pm_runtime_enable(dev); + + if (info->pll_clks) + samsung_clk_register_pll(ctx, info->pll_clks, info->nr_pll_clks, + reg_base); + if (info->mux_clks) + samsung_clk_register_mux(ctx, info->mux_clks, + info->nr_mux_clks); + if (info->div_clks) + samsung_clk_register_div(ctx, info->div_clks, + info->nr_div_clks); + if (info->gate_clks) + samsung_clk_register_gate(ctx, info->gate_clks, + info->nr_gate_clks); + if (info->fixed_clks) + samsung_clk_register_fixed_rate(ctx, info->fixed_clks, + info->nr_fixed_clks); + if (info->fixed_factor_clks) + samsung_clk_register_fixed_factor(ctx, info->fixed_factor_clks, + info->nr_fixed_factor_clks); + + samsung_clk_of_add_provider(dev->of_node, ctx); + pm_runtime_put_sync(dev); + + return 0; +} + +static const struct of_device_id exynos5433_cmu_of_match[] = { + { + .compatible = "samsung,exynos5433-cmu-aud", + .data = &aud_cmu_info, + }, { + .compatible = "samsung,exynos5433-cmu-cam0", + .data = &cam0_cmu_info, + }, { + .compatible = "samsung,exynos5433-cmu-cam1", + .data = &cam1_cmu_info, + }, { + .compatible = "samsung,exynos5433-cmu-disp", + .data = &disp_cmu_info, + }, { + .compatible = "samsung,exynos5433-cmu-g2d", + .data = &g2d_cmu_info, + }, { + .compatible = "samsung,exynos5433-cmu-g3d", + .data = &g3d_cmu_info, + }, { + .compatible = "samsung,exynos5433-cmu-fsys", + .data = &fsys_cmu_info, + }, { + .compatible = "samsung,exynos5433-cmu-gscl", + .data = &gscl_cmu_info, + }, { + .compatible = "samsung,exynos5433-cmu-mfc", + .data = &mfc_cmu_info, + }, { + .compatible = "samsung,exynos5433-cmu-hevc", + .data = &hevc_cmu_info, + }, { + .compatible = "samsung,exynos5433-cmu-isp", + .data = &isp_cmu_info, + }, { + .compatible = "samsung,exynos5433-cmu-mscl", + .data = &mscl_cmu_info, + }, { + }, +}; + +static const struct dev_pm_ops exynos5433_cmu_pm_ops = { + SET_RUNTIME_PM_OPS(exynos5433_cmu_suspend, exynos5433_cmu_resume, + NULL) + SET_LATE_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, + pm_runtime_force_resume) +}; + +static struct platform_driver exynos5433_cmu_driver __refdata = { + .driver = { + .name = "exynos5433-cmu", + .of_match_table = exynos5433_cmu_of_match, + .suppress_bind_attrs = true, + .pm = &exynos5433_cmu_pm_ops, + }, + .probe = exynos5433_cmu_probe, }; -static void __init exynos5433_cmu_cam1_init(struct device_node *np) +static int __init exynos5433_cmu_init(void) { - samsung_cmu_register_one(np, &cam1_cmu_info); + return platform_driver_register(&exynos5433_cmu_driver); } -CLK_OF_DECLARE(exynos5433_cmu_cam1, "samsung,exynos5433-cmu-cam1", - exynos5433_cmu_cam1_init); +core_initcall(exynos5433_cmu_init); diff --git a/drivers/clk/samsung/clk.h b/drivers/clk/samsung/clk.h index 9263d8a27c6b..664020cb4794 100644 --- a/drivers/clk/samsung/clk.h +++ b/drivers/clk/samsung/clk.h @@ -354,6 +354,12 @@ struct samsung_cmu_info { /* list and number of clocks registers */ const unsigned long *clk_regs; unsigned int nr_clk_regs; + + /* list and number of clocks registers to set before suspend */ + const struct samsung_clk_reg_dump *suspend_regs; + unsigned int nr_suspend_regs; + /* name of the parent clock needed for CMU register access */ + const char *clk_name; }; extern struct samsung_clk_provider *__init samsung_clk_init(
Add runtime pm support for all clock controller units (CMU), which belongs to power domains and require special handling during on/off operations. Typically special values has to be written to MUX registers to change internal clocks parents to OSC clock before turning power off. During such operation all clocks, which enters CMU has to be enabled to let MUX to stabilize. Also for each CMU there is one special parent clock, which has to be enabled all the time when any access to CMU registers is done. This patch solves most of the mysterious external abort and freeze issues caused by a lack of proper parent CMU clock enabled or incorrect turn off procedure. Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> --- .../devicetree/bindings/clock/exynos5433-clock.txt | 16 + drivers/clk/samsung/clk-exynos5433.c | 413 ++++++++++++++++----- drivers/clk/samsung/clk.h | 6 + 3 files changed, 350 insertions(+), 85 deletions(-)