#include #include #include #include #include #include #include #include #include #include "amba-clcd-nomadik.h" static struct gpio_desc *grestb; static struct gpio_desc *scen; static struct gpio_desc *scl; static struct gpio_desc *sda; static u8 tpg110_readwrite_reg(bool write, u8 address, u8 outval) { int i; u8 inval = 0; /* Assert SCEN */ gpiod_set_value_cansleep(scen, 1); ndelay(150); /* Hammer out the address */ for (i = 5; i >= 0; i--) { if (address & BIT(i)) gpiod_set_value_cansleep(sda, 1); else gpiod_set_value_cansleep(sda, 0); ndelay(150); /* Send an SCL pulse */ gpiod_set_value_cansleep(scl, 1); ndelay(160); gpiod_set_value_cansleep(scl, 0); ndelay(160); } if (write) { /* WRITE */ gpiod_set_value_cansleep(sda, 0); } else { /* READ */ gpiod_set_value_cansleep(sda, 1); } ndelay(150); /* Send an SCL pulse */ gpiod_set_value_cansleep(scl, 1); ndelay(160); gpiod_set_value_cansleep(scl, 0); ndelay(160); if (!write) /* HiZ turn-around cycle */ gpiod_direction_input(sda); ndelay(150); /* Send an SCL pulse */ gpiod_set_value_cansleep(scl, 1); ndelay(160); gpiod_set_value_cansleep(scl, 0); ndelay(160); /* Hammer in/out the data */ for (i = 7; i >= 0; i--) { int value; if (write) { value = !!(outval & BIT(i)); gpiod_set_value_cansleep(sda, value); } else { value = gpiod_get_value(sda); if (value) inval |= BIT(i); } ndelay(150); /* Send an SCL pulse */ gpiod_set_value_cansleep(scl, 1); ndelay(160); gpiod_set_value_cansleep(scl, 0); ndelay(160); } gpiod_direction_output(sda, 0); /* Deassert SCEN */ gpiod_set_value_cansleep(scen, 0); /* Satisfies SCEN pulse width */ udelay(1); return inval; } static u8 tpg110_read_reg(u8 address) { return tpg110_readwrite_reg(false, address, 0); } static void tpg110_write_reg(u8 address, u8 outval) { tpg110_readwrite_reg(true, address, outval); } static void tpg110_startup(struct device *dev) { u8 val; dev_info(dev, "TPG110 display enable\n"); /* De-assert the reset signal */ gpiod_set_value_cansleep(grestb, 0); mdelay(1); dev_info(dev, "de-asserted GRESTB\n"); /* Test display communication */ tpg110_write_reg(0x00, 0x55); val = tpg110_read_reg(0x00); if (val == 0x55) dev_info(dev, "passed communication test\n"); val = tpg110_read_reg(0x01); dev_info(dev, "TPG110 chip ID: %d version: %d\n", val>>4, val&0x0f); /* Show display resolution */ val = tpg110_read_reg(0x02); val &= 7; switch (val) { case 0x0: dev_info(dev, "IN 400x240 RGB -> OUT 800x480 RGB (dual scan)"); break; case 0x1: dev_info(dev, "IN 480x272 RGB -> OUT 800x480 RGB (dual scan)"); break; case 0x4: dev_info(dev, "480x640 RGB"); break; case 0x5: dev_info(dev, "480x272 RGB"); break; case 0x6: dev_info(dev, "640x480 RGB"); break; case 0x7: dev_info(dev, "800x480 RGB"); break; default: dev_info(dev, "ILLEGAL RESOLUTION"); break; } val = tpg110_read_reg(0x03); dev_info(dev, "resolution is controlled by %s\n", (val & BIT(7)) ? "software" : "hardware"); } static void tpg110_enable(struct clcd_fb *fb) { struct device *dev = &fb->dev->dev; static bool startup; u8 val; if (!startup) { tpg110_startup(dev); startup = true; } /* Take chip out of standby */ val = tpg110_read_reg(0x03); val |= BIT(0); tpg110_write_reg(0x03, val); } static void tpg110_disable(struct clcd_fb *fb) { u8 val; dev_info(&fb->dev->dev, "TPG110 display disable\n"); val = tpg110_read_reg(0x03); /* Put into standby */ val &= ~BIT(0); tpg110_write_reg(0x03, val); } static void tpg110_init(struct device *dev, struct device_node *np, struct clcd_board *board) { dev_info(dev, "TPG110 display init\n"); grestb = devm_get_gpiod_from_child(dev, "grestb", &np->fwnode); if (IS_ERR(grestb)) { dev_err(dev, "no GRESTB GPIO\n"); return; } /* This asserts the GRESTB signal, putting the display into reset */ gpiod_direction_output(grestb, 1); scen = devm_get_gpiod_from_child(dev, "scen", &np->fwnode); if (IS_ERR(scen)) { dev_err(dev, "no SCEN GPIO\n"); return; } gpiod_direction_output(scen, 0); scl = devm_get_gpiod_from_child(dev, "scl", &np->fwnode); if (IS_ERR(scl)) { dev_err(dev, "no SCL GPIO\n"); return; } gpiod_direction_output(scl, 0); sda = devm_get_gpiod_from_child(dev, "sda", &np->fwnode); if (IS_ERR(sda)) { dev_err(dev, "no SDA GPIO\n"); return; } gpiod_direction_output(sda, 0); board->enable = tpg110_enable; board->disable = tpg110_disable; } int nomadik_clcd_init_panel(struct clcd_fb *fb, struct device_node *endpoint) { struct device_node *panel; panel = of_graph_get_remote_port_parent(endpoint); if (!panel) return -ENODEV; if (of_device_is_compatible(panel, "tpo,tpg110")) tpg110_init(&fb->dev->dev, panel, fb->board); else dev_info(&fb->dev->dev, "unknown panel\n"); /* Unknown panel, fall through */ return 0; } EXPORT_SYMBOL_GPL(nomadik_clcd_init_panel); #define PMU_CTRL_OFFSET 0x0000 #define PMU_CTRL_LCDNDIF BIT(26) int nomadik_clcd_init_board(struct amba_device *adev, struct clcd_board *board) { struct regmap *pmu_regmap; dev_info(&adev->dev, "Nomadik CLCD board init\n"); pmu_regmap = syscon_regmap_lookup_by_compatible("stericsson,nomadik-pmu"); if (IS_ERR(pmu_regmap)) { dev_err(&adev->dev, "could not find PMU syscon regmap\n"); return PTR_ERR(pmu_regmap); } regmap_update_bits(pmu_regmap, PMU_CTRL_OFFSET, PMU_CTRL_LCDNDIF, 0); dev_info(&adev->dev, "set PMU mux to CLCD mode\n"); return 0; } EXPORT_SYMBOL_GPL(nomadik_clcd_init_board); e9b98994ce3d5aeca52445d1f5627c4ba'>0b3589be9b98994ce3d5aeca52445d1f5627c4ba (diff)
perf/x86/intel/rapl: Make package handling more robust
The package management code in RAPL relies on package mapping being available before a CPU is started. This changed with: 9d85eb9119f4 ("x86/smpboot: Make logical package management more robust") because the ACPI/BIOS information turned out to be unreliable, but that left RAPL in broken state. This was not noticed because on a regular boot all CPUs are online before RAPL is initialized. A possible fix would be to reintroduce the mess which allocates a package data structure in CPU prepare and when it turns out to already exist in starting throw it away later in the CPU online callback. But that's a horrible hack and not required at all because RAPL becomes functional for perf only in the CPU online callback. That's correct because user space is not yet informed about the CPU being onlined, so nothing caan rely on RAPL being available on that particular CPU. Move the allocation to the CPU online callback and simplify the hotplug handling. At this point the package mapping is established and correct. This also adds a missing check for available package data in the event_init() function. Reported-by: Yasuaki Ishimatsu <yasu.isimatu@gmail.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Sebastian Siewior <bigeasy@linutronix.de> Cc: Stephane Eranian <eranian@google.com> Cc: Vince Weaver <vincent.weaver@maine.edu> Fixes: 9d85eb9119f4 ("x86/smpboot: Make logical package management more robust") Link: http://lkml.kernel.org/r/20170131230141.212593966@linutronix.de Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'drivers/usb/host/xhci-trace.c')