From af321d2e32b3167129b35856316d4c55126556cf Mon Sep 17 00:00:00 2001 From: Stefan Agner Date: Wed, 21 Jan 2015 00:12:45 +0100 Subject: [PATCH 01/11] ARM: vf610: use SMP_ON_UP for Vybrid SoC The Vybrid SoC has only one Cortex-A5 core and hence should select the SMP_ON_UP configuration on a SMP kernel. Signed-off-by: Stefan Agner Signed-off-by: Shawn Guo --- arch/arm/mach-imx/Kconfig | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/arm/mach-imx/Kconfig b/arch/arm/mach-imx/Kconfig index e8627e04e1e6..b8d3ccdfe127 100644 --- a/arch/arm/mach-imx/Kconfig +++ b/arch/arm/mach-imx/Kconfig @@ -634,6 +634,7 @@ config SOC_VF610 select ARM_GIC select PINCTRL_VF610 select PL310_ERRATA_769419 if CACHE_L2X0 + select SMP_ON_UP if SMP help This enable support for Freescale Vybrid VF610 processor. From 5f80e19081e233698c8ea77ed2dd84a66f49fc54 Mon Sep 17 00:00:00 2001 From: Liu Ying Date: Thu, 12 Feb 2015 14:01:25 +0800 Subject: [PATCH 02/11] ARM: imx6q: Add GPR3 MIPI muxing control register field shift bits definition This patch adds a macro to define the GPR3 MIPI muxing control register field shift bits. Signed-off-by: Liu Ying Signed-off-by: Shawn Guo --- include/linux/mfd/syscon/imx6q-iomuxc-gpr.h | 1 + 1 file changed, 1 insertion(+) diff --git a/include/linux/mfd/syscon/imx6q-iomuxc-gpr.h b/include/linux/mfd/syscon/imx6q-iomuxc-gpr.h index c877cad61a13..d16f4c82c568 100644 --- a/include/linux/mfd/syscon/imx6q-iomuxc-gpr.h +++ b/include/linux/mfd/syscon/imx6q-iomuxc-gpr.h @@ -207,6 +207,7 @@ #define IMX6Q_GPR3_LVDS0_MUX_CTL_IPU1_DI1 (0x1 << 6) #define IMX6Q_GPR3_LVDS0_MUX_CTL_IPU2_DI0 (0x2 << 6) #define IMX6Q_GPR3_LVDS0_MUX_CTL_IPU2_DI1 (0x3 << 6) +#define IMX6Q_GPR3_MIPI_MUX_CTL_SHIFT 4 #define IMX6Q_GPR3_MIPI_MUX_CTL_MASK (0x3 << 4) #define IMX6Q_GPR3_MIPI_MUX_CTL_IPU1_DI0 (0x0 << 4) #define IMX6Q_GPR3_MIPI_MUX_CTL_IPU1_DI1 (0x1 << 4) From 8f21d8d42802a68daef5a34daca8b61df96ff8c6 Mon Sep 17 00:00:00 2001 From: Liu Ying Date: Thu, 12 Feb 2015 14:01:26 +0800 Subject: [PATCH 03/11] ARM: imx6q: clk: Add the video_27m clock This patch supports the video_27m clock which is a fixed factor clock of the pll3_pfd1_540m clock. Signed-off-by: Liu Ying Signed-off-by: Shawn Guo --- arch/arm/mach-imx/clk-imx6q.c | 1 + include/dt-bindings/clock/imx6qdl-clock.h | 3 ++- 2 files changed, 3 insertions(+), 1 deletion(-) diff --git a/arch/arm/mach-imx/clk-imx6q.c b/arch/arm/mach-imx/clk-imx6q.c index d04a430607b8..8335bfc14a58 100644 --- a/arch/arm/mach-imx/clk-imx6q.c +++ b/arch/arm/mach-imx/clk-imx6q.c @@ -246,6 +246,7 @@ static void __init imx6q_clocks_init(struct device_node *ccm_node) clk[IMX6QDL_CLK_PLL3_60M] = imx_clk_fixed_factor("pll3_60m", "pll3_usb_otg", 1, 8); clk[IMX6QDL_CLK_TWD] = imx_clk_fixed_factor("twd", "arm", 1, 2); clk[IMX6QDL_CLK_GPT_3M] = imx_clk_fixed_factor("gpt_3m", "osc", 1, 8); + clk[IMX6QDL_CLK_VIDEO_27M] = imx_clk_fixed_factor("video_27m", "pll3_pfd1_540m", 1, 20); if (cpu_is_imx6dl()) { clk[IMX6QDL_CLK_GPU2D_AXI] = imx_clk_fixed_factor("gpu2d_axi", "mmdc_ch0_axi_podf", 1, 1); clk[IMX6QDL_CLK_GPU3D_AXI] = imx_clk_fixed_factor("gpu3d_axi", "mmdc_ch0_axi_podf", 1, 1); diff --git a/include/dt-bindings/clock/imx6qdl-clock.h b/include/dt-bindings/clock/imx6qdl-clock.h index b690cdba163b..25625bf3927b 100644 --- a/include/dt-bindings/clock/imx6qdl-clock.h +++ b/include/dt-bindings/clock/imx6qdl-clock.h @@ -248,6 +248,7 @@ #define IMX6QDL_PLL6_BYPASS 235 #define IMX6QDL_PLL7_BYPASS 236 #define IMX6QDL_CLK_GPT_3M 237 -#define IMX6QDL_CLK_END 238 +#define IMX6QDL_CLK_VIDEO_27M 238 +#define IMX6QDL_CLK_END 239 #endif /* __DT_BINDINGS_CLOCK_IMX6QDL_H */ From 974a7115986ee5d0b2db9cc8cd551e6f88e01378 Mon Sep 17 00:00:00 2001 From: Liu Ying Date: Thu, 12 Feb 2015 14:01:27 +0800 Subject: [PATCH 04/11] ARM: imx6q: clk: Change hdmi_isfr clock's parent to be video_27m clock According to the table 33-1 in the i.MX6Q reference manual, the hdmi_isfr clock's parent should be the video_27m clock. The i.MX6DL reference manual has the same statement. This patch changes the hdmi_isfr clock's parent from the pll3_pfd1_540m clock to the video_27m clock. Suggested-by: Philipp Zabel Signed-off-by: Liu Ying Signed-off-by: Shawn Guo --- arch/arm/mach-imx/clk-imx6q.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/arm/mach-imx/clk-imx6q.c b/arch/arm/mach-imx/clk-imx6q.c index 8335bfc14a58..ab6acd95c0a8 100644 --- a/arch/arm/mach-imx/clk-imx6q.c +++ b/arch/arm/mach-imx/clk-imx6q.c @@ -401,7 +401,7 @@ static void __init imx6q_clocks_init(struct device_node *ccm_node) clk[IMX6QDL_CLK_GPU2D_CORE] = imx_clk_gate2("gpu2d_core", "gpu2d_core_podf", base + 0x6c, 24); clk[IMX6QDL_CLK_GPU3D_CORE] = imx_clk_gate2("gpu3d_core", "gpu3d_core_podf", base + 0x6c, 26); clk[IMX6QDL_CLK_HDMI_IAHB] = imx_clk_gate2("hdmi_iahb", "ahb", base + 0x70, 0); - clk[IMX6QDL_CLK_HDMI_ISFR] = imx_clk_gate2("hdmi_isfr", "pll3_pfd1_540m", base + 0x70, 4); + clk[IMX6QDL_CLK_HDMI_ISFR] = imx_clk_gate2("hdmi_isfr", "video_27m", base + 0x70, 4); clk[IMX6QDL_CLK_I2C1] = imx_clk_gate2("i2c1", "ipg_per", base + 0x70, 6); clk[IMX6QDL_CLK_I2C2] = imx_clk_gate2("i2c2", "ipg_per", base + 0x70, 8); clk[IMX6QDL_CLK_I2C3] = imx_clk_gate2("i2c3", "ipg_per", base + 0x70, 10); From 721fee59d26e46700476f4c70572e9e0f1cc8fd3 Mon Sep 17 00:00:00 2001 From: Liu Ying Date: Thu, 12 Feb 2015 14:01:28 +0800 Subject: [PATCH 05/11] ARM: imx6q: clk: Change hsi_tx clock to be a shared clock gate The CG8 field of the CCM CCGR3 register is named as 'mipi_core_cfg' clock, according to the i.MX6q/sdl reference manuals. This clock is actually the gate for several clocks, including the hsi_tx_sel clock's output and the video_27m clock's output. So, this patch changes the hsi_tx clock to be a shared clock gate. Suggested-by: Philipp Zabel Signed-off-by: Liu Ying Signed-off-by: Shawn Guo --- arch/arm/mach-imx/clk-imx6q.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/arch/arm/mach-imx/clk-imx6q.c b/arch/arm/mach-imx/clk-imx6q.c index ab6acd95c0a8..6843ea9707c1 100644 --- a/arch/arm/mach-imx/clk-imx6q.c +++ b/arch/arm/mach-imx/clk-imx6q.c @@ -119,6 +119,7 @@ static unsigned int share_count_asrc; static unsigned int share_count_ssi1; static unsigned int share_count_ssi2; static unsigned int share_count_ssi3; +static unsigned int share_count_mipi_core_cfg; static void __init imx6q_clocks_init(struct device_node *ccm_node) { @@ -416,7 +417,7 @@ static void __init imx6q_clocks_init(struct device_node *ccm_node) clk[IMX6QDL_CLK_LDB_DI0] = imx_clk_gate2("ldb_di0", "ldb_di0_podf", base + 0x74, 12); clk[IMX6QDL_CLK_LDB_DI1] = imx_clk_gate2("ldb_di1", "ldb_di1_podf", base + 0x74, 14); clk[IMX6QDL_CLK_IPU2_DI1] = imx_clk_gate2("ipu2_di1", "ipu2_di1_sel", base + 0x74, 10); - clk[IMX6QDL_CLK_HSI_TX] = imx_clk_gate2("hsi_tx", "hsi_tx_podf", base + 0x74, 16); + clk[IMX6QDL_CLK_HSI_TX] = imx_clk_gate2_shared("hsi_tx", "hsi_tx_podf", base + 0x74, 16, &share_count_mipi_core_cfg); if (cpu_is_imx6dl()) /* * The multiplexer and divider of the imx6q clock gpu2d get From 5ccc248cc53708337a2bfe4ea380c20948e8bbed Mon Sep 17 00:00:00 2001 From: Liu Ying Date: Thu, 12 Feb 2015 14:01:29 +0800 Subject: [PATCH 06/11] ARM: imx6q: clk: Add support for mipi_core_cfg clock as a shared clock gate The CG8 field of the CCM CCGR3 register is named as 'mipi_core_cfg' clock, according to the i.MX6q/sdl reference manuals. This clock is actually the gate for several clocks, including the hsi_tx_sel clock's output and the video_27m clock's output. The MIPI DSI host controller embedded in the i.MX6q/sdl SoCs uses the video_27m clock to generate PLL reference clock and MIPI core configuration clock. In order to gate/ungate the two MIPI DSI host controller relevant clocks, this patch adds the mipi_core_cfg clock as a shared clock gate. Suggested-by: Philipp Zabel Signed-off-by: Liu Ying Signed-off-by: Shawn Guo --- arch/arm/mach-imx/clk-imx6q.c | 1 + include/dt-bindings/clock/imx6qdl-clock.h | 3 ++- 2 files changed, 3 insertions(+), 1 deletion(-) diff --git a/arch/arm/mach-imx/clk-imx6q.c b/arch/arm/mach-imx/clk-imx6q.c index 6843ea9707c1..e59e2c6943fd 100644 --- a/arch/arm/mach-imx/clk-imx6q.c +++ b/arch/arm/mach-imx/clk-imx6q.c @@ -418,6 +418,7 @@ static void __init imx6q_clocks_init(struct device_node *ccm_node) clk[IMX6QDL_CLK_LDB_DI1] = imx_clk_gate2("ldb_di1", "ldb_di1_podf", base + 0x74, 14); clk[IMX6QDL_CLK_IPU2_DI1] = imx_clk_gate2("ipu2_di1", "ipu2_di1_sel", base + 0x74, 10); clk[IMX6QDL_CLK_HSI_TX] = imx_clk_gate2_shared("hsi_tx", "hsi_tx_podf", base + 0x74, 16, &share_count_mipi_core_cfg); + clk[IMX6QDL_CLK_MIPI_CORE_CFG] = imx_clk_gate2_shared("mipi_core_cfg", "video_27m", base + 0x74, 16, &share_count_mipi_core_cfg); if (cpu_is_imx6dl()) /* * The multiplexer and divider of the imx6q clock gpu2d get diff --git a/include/dt-bindings/clock/imx6qdl-clock.h b/include/dt-bindings/clock/imx6qdl-clock.h index 25625bf3927b..dbc828c23a17 100644 --- a/include/dt-bindings/clock/imx6qdl-clock.h +++ b/include/dt-bindings/clock/imx6qdl-clock.h @@ -249,6 +249,7 @@ #define IMX6QDL_PLL7_BYPASS 236 #define IMX6QDL_CLK_GPT_3M 237 #define IMX6QDL_CLK_VIDEO_27M 238 -#define IMX6QDL_CLK_END 239 +#define IMX6QDL_CLK_MIPI_CORE_CFG 239 +#define IMX6QDL_CLK_END 240 #endif /* __DT_BINDINGS_CLOCK_IMX6QDL_H */ From e654df7a1a4843429b5d1d6ee40cac9ecef75304 Mon Sep 17 00:00:00 2001 From: Liu Ying Date: Thu, 12 Feb 2015 14:01:30 +0800 Subject: [PATCH 07/11] ARM: imx6q: clk: Add support for mipi_ipg clock as a shared clock gate The CG8 field of the CCM CCGR3 register is the 'mipi_core_cfg' gate clock, according to the i.MX6q/sdl reference manuals. This clock is actually the gate for several clocks, including the ipg clock's output. The MIPI DSI host controller embedded in the i.MX6q/sdl SoCs takes the ipg clock as the pclk - the APB clock signal . In order to gate/ungate the ipg clock, this patch adds a new shared clock gate named as "mipi_ipg". Signed-off-by: Liu Ying Signed-off-by: Shawn Guo --- arch/arm/mach-imx/clk-imx6q.c | 1 + include/dt-bindings/clock/imx6qdl-clock.h | 3 ++- 2 files changed, 3 insertions(+), 1 deletion(-) diff --git a/arch/arm/mach-imx/clk-imx6q.c b/arch/arm/mach-imx/clk-imx6q.c index e59e2c6943fd..469a150bf98f 100644 --- a/arch/arm/mach-imx/clk-imx6q.c +++ b/arch/arm/mach-imx/clk-imx6q.c @@ -419,6 +419,7 @@ static void __init imx6q_clocks_init(struct device_node *ccm_node) clk[IMX6QDL_CLK_IPU2_DI1] = imx_clk_gate2("ipu2_di1", "ipu2_di1_sel", base + 0x74, 10); clk[IMX6QDL_CLK_HSI_TX] = imx_clk_gate2_shared("hsi_tx", "hsi_tx_podf", base + 0x74, 16, &share_count_mipi_core_cfg); clk[IMX6QDL_CLK_MIPI_CORE_CFG] = imx_clk_gate2_shared("mipi_core_cfg", "video_27m", base + 0x74, 16, &share_count_mipi_core_cfg); + clk[IMX6QDL_CLK_MIPI_IPG] = imx_clk_gate2_shared("mipi_ipg", "ipg", base + 0x74, 16, &share_count_mipi_core_cfg); if (cpu_is_imx6dl()) /* * The multiplexer and divider of the imx6q clock gpu2d get diff --git a/include/dt-bindings/clock/imx6qdl-clock.h b/include/dt-bindings/clock/imx6qdl-clock.h index dbc828c23a17..8780868458a0 100644 --- a/include/dt-bindings/clock/imx6qdl-clock.h +++ b/include/dt-bindings/clock/imx6qdl-clock.h @@ -250,6 +250,7 @@ #define IMX6QDL_CLK_GPT_3M 237 #define IMX6QDL_CLK_VIDEO_27M 238 #define IMX6QDL_CLK_MIPI_CORE_CFG 239 -#define IMX6QDL_CLK_END 240 +#define IMX6QDL_CLK_MIPI_IPG 240 +#define IMX6QDL_CLK_END 241 #endif /* __DT_BINDINGS_CLOCK_IMX6QDL_H */ From 52c47b63412b0946fcf3c04b5e152df41fc7eca5 Mon Sep 17 00:00:00 2001 From: Alison Chaiken Date: Wed, 18 Feb 2015 23:24:10 -0800 Subject: [PATCH 08/11] bus: imx-weim: improve error handling upon child probe-failure Probe all children of the WEIM node, reporting any failures. Report failure from parsing of WEIM node itself if probes of all children fail. Signed-off-by: Alison Chaiken Acked-by: Sascha Hauer Signed-off-by: Shawn Guo --- drivers/bus/imx-weim.c | 13 +++++++------ 1 file changed, 7 insertions(+), 6 deletions(-) diff --git a/drivers/bus/imx-weim.c b/drivers/bus/imx-weim.c index 0958b6981773..e98d15eaa799 100644 --- a/drivers/bus/imx-weim.c +++ b/drivers/bus/imx-weim.c @@ -142,7 +142,7 @@ static int __init weim_parse_dt(struct platform_device *pdev, &pdev->dev); const struct imx_weim_devtype *devtype = of_id->data; struct device_node *child; - int ret; + int ret, have_child = 0; if (devtype == &imx50_weim_devtype) { ret = imx_weim_gpr_setup(pdev); @@ -155,14 +155,15 @@ static int __init weim_parse_dt(struct platform_device *pdev, continue; ret = weim_timing_setup(child, base, devtype); - if (ret) { - dev_err(&pdev->dev, "%s set timing failed.\n", + if (ret) + dev_warn(&pdev->dev, "%s set timing failed.\n", child->full_name); - return ret; - } + else + have_child = 1; } - ret = of_platform_populate(pdev->dev.of_node, + if (have_child) + ret = of_platform_populate(pdev->dev.of_node, of_default_bus_match_table, NULL, &pdev->dev); if (ret) From 58e4a668be82362c32577ef08e06c8a292e3a457 Mon Sep 17 00:00:00 2001 From: Philipp Zabel Date: Mon, 23 Feb 2015 18:40:11 +0100 Subject: [PATCH 09/11] Documentation: Add device tree bindings for Freescale i.MX GPC The i.MX6 contains a power controller that controls power gating and sequencing for the SoC's power domains. Signed-off-by: Philipp Zabel Signed-off-by: Shawn Guo --- .../devicetree/bindings/power/fsl,imx-gpc.txt | 59 +++++++++++++++++++ 1 file changed, 59 insertions(+) create mode 100644 Documentation/devicetree/bindings/power/fsl,imx-gpc.txt diff --git a/Documentation/devicetree/bindings/power/fsl,imx-gpc.txt b/Documentation/devicetree/bindings/power/fsl,imx-gpc.txt new file mode 100644 index 000000000000..65cc0345747d --- /dev/null +++ b/Documentation/devicetree/bindings/power/fsl,imx-gpc.txt @@ -0,0 +1,59 @@ +Freescale i.MX General Power Controller +======================================= + +The i.MX6Q General Power Control (GPC) block contains DVFS load tracking +counters and Power Gating Control (PGC) for the CPU and PU (GPU/VPU) power +domains. + +Required properties: +- compatible: Should be "fsl,imx6q-gpc" or "fsl,imx6sl-gpc" +- reg: should be register base and length as documented in the + datasheet +- interrupts: Should contain GPC interrupt request 1 +- pu-supply: Link to the LDO regulator powering the PU power domain +- clocks: Clock phandles to devices in the PU power domain that need + to be enabled during domain power-up for reset propagation. +- #power-domain-cells: Should be 1, see below: + +The gpc node is a power-controller as documented by the generic power domain +bindings in Documentation/devicetree/bindings/power/power_domain.txt. + +Example: + + gpc: gpc@020dc000 { + compatible = "fsl,imx6q-gpc"; + reg = <0x020dc000 0x4000>; + interrupts = <0 89 IRQ_TYPE_LEVEL_HIGH>, + <0 90 IRQ_TYPE_LEVEL_HIGH>; + pu-supply = <®_pu>; + clocks = <&clks IMX6QDL_CLK_GPU3D_CORE>, + <&clks IMX6QDL_CLK_GPU3D_SHADER>, + <&clks IMX6QDL_CLK_GPU2D_CORE>, + <&clks IMX6QDL_CLK_GPU2D_AXI>, + <&clks IMX6QDL_CLK_OPENVG_AXI>, + <&clks IMX6QDL_CLK_VPU_AXI>; + #power-domain-cells = <1>; + }; + + +Specifying power domain for IP modules +====================================== + +IP cores belonging to a power domain should contain a 'power-domains' property +that is a phandle pointing to the gpc device node and a DOMAIN_INDEX specifying +the power domain the device belongs to. + +Example of a device that is part of the PU power domain: + + vpu: vpu@02040000 { + reg = <0x02040000 0x3c000>; + /* ... */ + power-domains = <&gpc 1>; + /* ... */ + }; + +The following DOMAIN_INDEX values are valid for i.MX6Q: +ARM_DOMAIN 0 +PU_DOMAIN 1 +The following additional DOMAIN_INDEX value is valid for i.MX6SL: +DISPLAY_DOMAIN 2 From 00eb60a8b4f7a4aa00fd8abd68c2dc7aec55df19 Mon Sep 17 00:00:00 2001 From: Philipp Zabel Date: Mon, 23 Feb 2015 18:40:12 +0100 Subject: [PATCH 10/11] ARM: imx6: gpc: Add PU power domain for GPU/VPU When generic pm domain support is enabled, the PGC can be used to completely gate power to the PU power domain containing GPU3D, GPU2D, and VPU cores. This code triggers the PGC powerdown sequence to disable the GPU/VPU isolation cells and gate power and then disables the PU regulator. To reenable, the reverse powerup sequence is triggered after the PU regulator is enabled again. The GPU and VPU devices in the PU power domain temporarily need to be clocked during powerup, so that the reset machinery can work. [Avoid explicit regulator enabling in probe, unless !PM] Signed-off-by: Markus Pargmann Signed-off-by: Philipp Zabel Signed-off-by: Shawn Guo --- arch/arm/mach-imx/Kconfig | 1 + arch/arm/mach-imx/gpc.c | 213 ++++++++++++++++++++++++++++++++++++++ 2 files changed, 214 insertions(+) diff --git a/arch/arm/mach-imx/Kconfig b/arch/arm/mach-imx/Kconfig index b8d3ccdfe127..178f0d001011 100644 --- a/arch/arm/mach-imx/Kconfig +++ b/arch/arm/mach-imx/Kconfig @@ -50,6 +50,7 @@ config HAVE_IMX_ANATOP config HAVE_IMX_GPC bool + select PM_GENERIC_DOMAINS if PM config HAVE_IMX_MMDC bool diff --git a/arch/arm/mach-imx/gpc.c b/arch/arm/mach-imx/gpc.c index 745caa18ab2c..029f59ce2712 100644 --- a/arch/arm/mach-imx/gpc.c +++ b/arch/arm/mach-imx/gpc.c @@ -10,15 +10,25 @@ * http://www.gnu.org/copyleft/gpl.html */ +#include +#include #include #include #include #include #include +#include +#include +#include #include #include "common.h" +#include "hardware.h" +#define GPC_CNTR 0x000 #define GPC_IMR1 0x008 +#define GPC_PGC_GPU_PDN 0x260 +#define GPC_PGC_GPU_PUPSCR 0x264 +#define GPC_PGC_GPU_PDNSCR 0x268 #define GPC_PGC_CPU_PDN 0x2a0 #define GPC_PGC_CPU_PUPSCR 0x2a4 #define GPC_PGC_CPU_PDNSCR 0x2a8 @@ -27,6 +37,18 @@ #define IMR_NUM 4 +#define GPU_VPU_PUP_REQ BIT(1) +#define GPU_VPU_PDN_REQ BIT(0) + +#define GPC_CLK_MAX 6 + +struct pu_domain { + struct generic_pm_domain base; + struct regulator *reg; + struct clk *clk[GPC_CLK_MAX]; + int num_clks; +}; + static void __iomem *gpc_base; static u32 gpc_wake_irqs[IMR_NUM]; static u32 gpc_saved_imrs[IMR_NUM]; @@ -170,3 +192,194 @@ void __init imx_gpc_init(void) gic_arch_extn.irq_unmask = imx_gpc_irq_unmask; gic_arch_extn.irq_set_wake = imx_gpc_irq_set_wake; } + +#ifdef CONFIG_PM_GENERIC_DOMAINS + +static void _imx6q_pm_pu_power_off(struct generic_pm_domain *genpd) +{ + int iso, iso2sw; + u32 val; + + /* Read ISO and ISO2SW power down delays */ + val = readl_relaxed(gpc_base + GPC_PGC_GPU_PDNSCR); + iso = val & 0x3f; + iso2sw = (val >> 8) & 0x3f; + + /* Gate off PU domain when GPU/VPU when powered down */ + writel_relaxed(0x1, gpc_base + GPC_PGC_GPU_PDN); + + /* Request GPC to power down GPU/VPU */ + val = readl_relaxed(gpc_base + GPC_CNTR); + val |= GPU_VPU_PDN_REQ; + writel_relaxed(val, gpc_base + GPC_CNTR); + + /* Wait ISO + ISO2SW IPG clock cycles */ + ndelay((iso + iso2sw) * 1000 / 66); +} + +static int imx6q_pm_pu_power_off(struct generic_pm_domain *genpd) +{ + struct pu_domain *pu = container_of(genpd, struct pu_domain, base); + + _imx6q_pm_pu_power_off(genpd); + + if (pu->reg) + regulator_disable(pu->reg); + + return 0; +} + +static int imx6q_pm_pu_power_on(struct generic_pm_domain *genpd) +{ + struct pu_domain *pu = container_of(genpd, struct pu_domain, base); + int i, ret, sw, sw2iso; + u32 val; + + if (pu->reg) + ret = regulator_enable(pu->reg); + if (pu->reg && ret) { + pr_err("%s: failed to enable regulator: %d\n", __func__, ret); + return ret; + } + + /* Enable reset clocks for all devices in the PU domain */ + for (i = 0; i < pu->num_clks; i++) + clk_prepare_enable(pu->clk[i]); + + /* Gate off PU domain when GPU/VPU when powered down */ + writel_relaxed(0x1, gpc_base + GPC_PGC_GPU_PDN); + + /* Read ISO and ISO2SW power down delays */ + val = readl_relaxed(gpc_base + GPC_PGC_GPU_PUPSCR); + sw = val & 0x3f; + sw2iso = (val >> 8) & 0x3f; + + /* Request GPC to power up GPU/VPU */ + val = readl_relaxed(gpc_base + GPC_CNTR); + val |= GPU_VPU_PUP_REQ; + writel_relaxed(val, gpc_base + GPC_CNTR); + + /* Wait ISO + ISO2SW IPG clock cycles */ + ndelay((sw + sw2iso) * 1000 / 66); + + /* Disable reset clocks for all devices in the PU domain */ + for (i = 0; i < pu->num_clks; i++) + clk_disable_unprepare(pu->clk[i]); + + return 0; +} + +static struct generic_pm_domain imx6q_arm_domain = { + .name = "ARM", +}; + +static struct pu_domain imx6q_pu_domain = { + .base = { + .name = "PU", + .power_off = imx6q_pm_pu_power_off, + .power_on = imx6q_pm_pu_power_on, + .power_off_latency_ns = 25000, + .power_on_latency_ns = 2000000, + }, +}; + +static struct generic_pm_domain imx6sl_display_domain = { + .name = "DISPLAY", +}; + +static struct generic_pm_domain *imx_gpc_domains[] = { + &imx6q_arm_domain, + &imx6q_pu_domain.base, + &imx6sl_display_domain, +}; + +static struct genpd_onecell_data imx_gpc_onecell_data = { + .domains = imx_gpc_domains, + .num_domains = ARRAY_SIZE(imx_gpc_domains), +}; + +static int imx_gpc_genpd_init(struct device *dev, struct regulator *pu_reg) +{ + struct clk *clk; + bool is_off; + int i; + + imx6q_pu_domain.reg = pu_reg; + + for (i = 0; ; i++) { + clk = of_clk_get(dev->of_node, i); + if (IS_ERR(clk)) + break; + if (i >= GPC_CLK_MAX) { + dev_err(dev, "more than %d clocks\n", GPC_CLK_MAX); + goto clk_err; + } + imx6q_pu_domain.clk[i] = clk; + } + imx6q_pu_domain.num_clks = i; + + is_off = IS_ENABLED(CONFIG_PM); + if (is_off) { + _imx6q_pm_pu_power_off(&imx6q_pu_domain.base); + } else { + /* + * Enable power if compiled without CONFIG_PM in case the + * bootloader disabled it. + */ + imx6q_pm_pu_power_on(&imx6q_pu_domain.base); + } + + pm_genpd_init(&imx6q_pu_domain.base, NULL, is_off); + return of_genpd_add_provider_onecell(dev->of_node, + &imx_gpc_onecell_data); + +clk_err: + while (i--) + clk_put(imx6q_pu_domain.clk[i]); + return -EINVAL; +} + +#else +static inline int imx_gpc_genpd_init(struct device *dev, struct regulator *reg) +{ + return 0; +} +#endif /* CONFIG_PM_GENERIC_DOMAINS */ + +static int imx_gpc_probe(struct platform_device *pdev) +{ + struct regulator *pu_reg; + int ret; + + pu_reg = devm_regulator_get_optional(&pdev->dev, "pu"); + if (PTR_ERR(pu_reg) == -ENODEV) + pu_reg = NULL; + if (IS_ERR(pu_reg)) { + ret = PTR_ERR(pu_reg); + dev_err(&pdev->dev, "failed to get pu regulator: %d\n", ret); + return ret; + } + + return imx_gpc_genpd_init(&pdev->dev, pu_reg); +} + +static const struct of_device_id imx_gpc_dt_ids[] = { + { .compatible = "fsl,imx6q-gpc" }, + { .compatible = "fsl,imx6sl-gpc" }, + { } +}; + +static struct platform_driver imx_gpc_driver = { + .driver = { + .name = "imx-gpc", + .owner = THIS_MODULE, + .of_match_table = imx_gpc_dt_ids, + }, + .probe = imx_gpc_probe, +}; + +static int __init imx_pgc_init(void) +{ + return platform_driver_register(&imx_gpc_driver); +} +subsys_initcall(imx_pgc_init); From ae4aee959f7959427e99edb3927c9512986cbdc5 Mon Sep 17 00:00:00 2001 From: Stefan Agner Date: Fri, 13 Mar 2015 00:36:15 +0100 Subject: [PATCH 11/11] ARM: imx: depend MXC debug board on 3DS machines Depend the MXC debug board on machines which actually support it. Signed-off-by: Stefan Agner Signed-off-by: Shawn Guo --- arch/arm/mach-imx/Kconfig | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/arm/mach-imx/Kconfig b/arch/arm/mach-imx/Kconfig index 178f0d001011..bf42a6a86bed 100644 --- a/arch/arm/mach-imx/Kconfig +++ b/arch/arm/mach-imx/Kconfig @@ -21,6 +21,7 @@ config MXC_AVIC config MXC_DEBUG_BOARD bool "Enable MXC debug board(for 3-stack)" + depends on MACH_MX27_3DS || MACH_MX31_3DS || MACH_MX35_3DS help The debug board is an integral part of the MXC 3-stack(PDK) platforms, it can be attached or removed from the peripheral