From 80e1dd82be59d247e899d8ce29389f84ed828994 Mon Sep 17 00:00:00 2001 From: Linus Walleij Date: Mon, 3 Nov 2014 16:48:47 -0800 Subject: mfd: stmpe: add pull up/down register offsets for STMPE This adds the register offsets for pull up/down for the STMPE 1601, 1801 and 24xx expanders. This is used to bias GPIO lines and keypad lines. Signed-off-by: Linus Walleij Acked-by: Lee Jones Signed-off-by: Dmitry Torokhov --- include/linux/mfd/stmpe.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'include/linux') diff --git a/include/linux/mfd/stmpe.h b/include/linux/mfd/stmpe.h index 575a86c7fcbd..cc0deb72e46b 100644 --- a/include/linux/mfd/stmpe.h +++ b/include/linux/mfd/stmpe.h @@ -50,6 +50,8 @@ enum { STMPE_IDX_GPEDR_MSB, STMPE_IDX_GPRER_LSB, STMPE_IDX_GPFER_LSB, + STMPE_IDX_GPPUR_LSB, + STMPE_IDX_GPPDR_LSB, STMPE_IDX_GPAFR_U_MSB, STMPE_IDX_IEGPIOR_LSB, STMPE_IDX_ISGPIOR_LSB, -- cgit v1.2.3 From a4164863e150c4991d2ac965e3fc52f9d8df3d7e Mon Sep 17 00:00:00 2001 From: Linus Walleij Date: Mon, 3 Nov 2014 16:51:26 -0800 Subject: Input: stmpe - enforce device tree only mode The STMPE keypad controller is only used with device tree configured systems, so force the configuration to come from device tree only, and now actually get the rows and cols from the device tree too. Signed-off-by: Linus Walleij Acked-by: Lee Jones Signed-off-by: Dmitry Torokhov --- .../devicetree/bindings/input/stmpe-keypad.txt | 2 + drivers/input/keyboard/Kconfig | 1 + drivers/input/keyboard/stmpe-keypad.c | 104 +++++++++------------ include/linux/mfd/stmpe.h | 20 ---- 4 files changed, 48 insertions(+), 79 deletions(-) (limited to 'include/linux') diff --git a/Documentation/devicetree/bindings/input/stmpe-keypad.txt b/Documentation/devicetree/bindings/input/stmpe-keypad.txt index 1b97222e8a0b..12bb771d66d4 100644 --- a/Documentation/devicetree/bindings/input/stmpe-keypad.txt +++ b/Documentation/devicetree/bindings/input/stmpe-keypad.txt @@ -8,6 +8,8 @@ Optional properties: - debounce-interval : Debouncing interval time in milliseconds - st,scan-count : Scanning cycles elapsed before key data is updated - st,no-autorepeat : If specified device will not autorepeat + - keypad,num-rows : See ./matrix-keymap.txt + - keypad,num-columns : See ./matrix-keymap.txt Example: diff --git a/drivers/input/keyboard/Kconfig b/drivers/input/keyboard/Kconfig index 96ee26c555e0..a5d9b3f3c871 100644 --- a/drivers/input/keyboard/Kconfig +++ b/drivers/input/keyboard/Kconfig @@ -559,6 +559,7 @@ config KEYBOARD_SH_KEYSC config KEYBOARD_STMPE tristate "STMPE keypad support" depends on MFD_STMPE + depends on OF select INPUT_MATRIXKMAP help Say Y here if you want to use the keypad controller on STMPE I/O diff --git a/drivers/input/keyboard/stmpe-keypad.c b/drivers/input/keyboard/stmpe-keypad.c index c6727dda68f2..8d1e7af3c5b1 100644 --- a/drivers/input/keyboard/stmpe-keypad.c +++ b/drivers/input/keyboard/stmpe-keypad.c @@ -45,7 +45,7 @@ #define STMPE_KEYPAD_MAX_ROWS 8 #define STMPE_KEYPAD_MAX_COLS 8 #define STMPE_KEYPAD_ROW_SHIFT 3 -#define STMPE_KEYPAD_KEYMAP_SIZE \ +#define STMPE_KEYPAD_KEYMAP_MAX_SIZE \ (STMPE_KEYPAD_MAX_ROWS * STMPE_KEYPAD_MAX_COLS) /** @@ -99,16 +99,30 @@ static const struct stmpe_keypad_variant stmpe_keypad_variants[] = { }, }; +/** + * struct stmpe_keypad - STMPE keypad state container + * @stmpe: pointer to parent STMPE device + * @input: spawned input device + * @variant: STMPE variant + * @debounce_ms: debounce interval, in ms. Maximum is + * %STMPE_KEYPAD_MAX_DEBOUNCE. + * @scan_count: number of key scanning cycles to confirm key data. + * Maximum is %STMPE_KEYPAD_MAX_SCAN_COUNT. + * @no_autorepeat: disable key autorepeat + * @rows: bitmask for the rows + * @cols: bitmask for the columns + * @keymap: the keymap + */ struct stmpe_keypad { struct stmpe *stmpe; struct input_dev *input; const struct stmpe_keypad_variant *variant; - const struct stmpe_keypad_platform_data *plat; - + unsigned int debounce_ms; + unsigned int scan_count; + bool no_autorepeat; unsigned int rows; unsigned int cols; - - unsigned short keymap[STMPE_KEYPAD_KEYMAP_SIZE]; + unsigned short keymap[STMPE_KEYPAD_KEYMAP_MAX_SIZE]; }; static int stmpe_keypad_read_data(struct stmpe_keypad *keypad, u8 *data) @@ -208,15 +222,14 @@ static int stmpe_keypad_altfunc_init(struct stmpe_keypad *keypad) static int stmpe_keypad_chip_init(struct stmpe_keypad *keypad) { - const struct stmpe_keypad_platform_data *plat = keypad->plat; const struct stmpe_keypad_variant *variant = keypad->variant; struct stmpe *stmpe = keypad->stmpe; int ret; - if (plat->debounce_ms > STMPE_KEYPAD_MAX_DEBOUNCE) + if (keypad->debounce_ms > STMPE_KEYPAD_MAX_DEBOUNCE) return -EINVAL; - if (plat->scan_count > STMPE_KEYPAD_MAX_SCAN_COUNT) + if (keypad->scan_count > STMPE_KEYPAD_MAX_SCAN_COUNT) return -EINVAL; ret = stmpe_enable(stmpe, STMPE_BLOCK_KEYPAD); @@ -245,7 +258,7 @@ static int stmpe_keypad_chip_init(struct stmpe_keypad *keypad) ret = stmpe_set_bits(stmpe, STMPE_KPC_CTRL_MSB, STMPE_KPC_CTRL_MSB_SCAN_COUNT, - plat->scan_count << 4); + keypad->scan_count << 4); if (ret < 0) return ret; @@ -253,17 +266,18 @@ static int stmpe_keypad_chip_init(struct stmpe_keypad *keypad) STMPE_KPC_CTRL_LSB_SCAN | STMPE_KPC_CTRL_LSB_DEBOUNCE, STMPE_KPC_CTRL_LSB_SCAN | - (plat->debounce_ms << 1)); + (keypad->debounce_ms << 1)); } -static void stmpe_keypad_fill_used_pins(struct stmpe_keypad *keypad) +static void stmpe_keypad_fill_used_pins(struct stmpe_keypad *keypad, + u32 used_rows, u32 used_cols) { int row, col; - for (row = 0; row < STMPE_KEYPAD_MAX_ROWS; row++) { - for (col = 0; col < STMPE_KEYPAD_MAX_COLS; col++) { + for (row = 0; row < used_rows; row++) { + for (col = 0; col < used_cols; col++) { int code = MATRIX_SCAN_CODE(row, col, - STMPE_KEYPAD_ROW_SHIFT); + STMPE_KEYPAD_ROW_SHIFT); if (keypad->keymap[code] != KEY_RESERVED) { keypad->rows |= 1 << row; keypad->cols |= 1 << col; @@ -272,51 +286,17 @@ static void stmpe_keypad_fill_used_pins(struct stmpe_keypad *keypad) } } -#ifdef CONFIG_OF -static const struct stmpe_keypad_platform_data * -stmpe_keypad_of_probe(struct device *dev) -{ - struct device_node *np = dev->of_node; - struct stmpe_keypad_platform_data *plat; - - if (!np) - return ERR_PTR(-ENODEV); - - plat = devm_kzalloc(dev, sizeof(*plat), GFP_KERNEL); - if (!plat) - return ERR_PTR(-ENOMEM); - - of_property_read_u32(np, "debounce-interval", &plat->debounce_ms); - of_property_read_u32(np, "st,scan-count", &plat->scan_count); - - plat->no_autorepeat = of_property_read_bool(np, "st,no-autorepeat"); - - return plat; -} -#else -static inline const struct stmpe_keypad_platform_data * -stmpe_keypad_of_probe(struct device *dev) -{ - return ERR_PTR(-EINVAL); -} -#endif - static int stmpe_keypad_probe(struct platform_device *pdev) { struct stmpe *stmpe = dev_get_drvdata(pdev->dev.parent); - const struct stmpe_keypad_platform_data *plat; + struct device_node *np = pdev->dev.of_node; struct stmpe_keypad *keypad; struct input_dev *input; + u32 rows; + u32 cols; int error; int irq; - plat = stmpe->pdata->keypad; - if (!plat) { - plat = stmpe_keypad_of_probe(&pdev->dev); - if (IS_ERR(plat)) - return PTR_ERR(plat); - } - irq = platform_get_irq(pdev, 0); if (irq < 0) return irq; @@ -326,6 +306,13 @@ static int stmpe_keypad_probe(struct platform_device *pdev) if (!keypad) return -ENOMEM; + keypad->stmpe = stmpe; + keypad->variant = &stmpe_keypad_variants[stmpe->partnum]; + + of_property_read_u32(np, "debounce-interval", &keypad->debounce_ms); + of_property_read_u32(np, "st,scan-count", &keypad->scan_count); + keypad->no_autorepeat = of_property_read_bool(np, "st,no-autorepeat"); + input = devm_input_allocate_device(&pdev->dev); if (!input) return -ENOMEM; @@ -334,23 +321,22 @@ static int stmpe_keypad_probe(struct platform_device *pdev) input->id.bustype = BUS_I2C; input->dev.parent = &pdev->dev; - error = matrix_keypad_build_keymap(plat->keymap_data, NULL, - STMPE_KEYPAD_MAX_ROWS, - STMPE_KEYPAD_MAX_COLS, + error = matrix_keypad_parse_of_params(&pdev->dev, &rows, &cols); + if (error) + return error; + + error = matrix_keypad_build_keymap(NULL, NULL, rows, cols, keypad->keymap, input); if (error) return error; input_set_capability(input, EV_MSC, MSC_SCAN); - if (!plat->no_autorepeat) + if (!keypad->no_autorepeat) __set_bit(EV_REP, input->evbit); - stmpe_keypad_fill_used_pins(keypad); + stmpe_keypad_fill_used_pins(keypad, rows, cols); - keypad->stmpe = stmpe; - keypad->plat = plat; keypad->input = input; - keypad->variant = &stmpe_keypad_variants[stmpe->partnum]; error = stmpe_keypad_chip_init(keypad); if (error < 0) diff --git a/include/linux/mfd/stmpe.h b/include/linux/mfd/stmpe.h index cc0deb72e46b..f742b6717d52 100644 --- a/include/linux/mfd/stmpe.h +++ b/include/linux/mfd/stmpe.h @@ -115,24 +115,6 @@ extern int stmpe_set_altfunc(struct stmpe *stmpe, u32 pins, extern int stmpe_enable(struct stmpe *stmpe, unsigned int blocks); extern int stmpe_disable(struct stmpe *stmpe, unsigned int blocks); -struct matrix_keymap_data; - -/** - * struct stmpe_keypad_platform_data - STMPE keypad platform data - * @keymap_data: key map table and size - * @debounce_ms: debounce interval, in ms. Maximum is - * %STMPE_KEYPAD_MAX_DEBOUNCE. - * @scan_count: number of key scanning cycles to confirm key data. - * Maximum is %STMPE_KEYPAD_MAX_SCAN_COUNT. - * @no_autorepeat: disable key autorepeat - */ -struct stmpe_keypad_platform_data { - const struct matrix_keymap_data *keymap_data; - unsigned int debounce_ms; - unsigned int scan_count; - bool no_autorepeat; -}; - #define STMPE_GPIO_NOREQ_811_TOUCH (0xf0) /** @@ -201,7 +183,6 @@ struct stmpe_ts_platform_data { * @irq_gpio: gpio number over which irq will be requested (significant only if * irq_over_gpio is true) * @gpio: GPIO-specific platform data - * @keypad: keypad-specific platform data * @ts: touchscreen-specific platform data */ struct stmpe_platform_data { @@ -214,7 +195,6 @@ struct stmpe_platform_data { int autosleep_timeout; struct stmpe_gpio_platform_data *gpio; - struct stmpe_keypad_platform_data *keypad; struct stmpe_ts_platform_data *ts; }; -- cgit v1.2.3 From fee7e49d45149fba60156f5b59014f764d3e3728 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Tue, 6 Jan 2015 13:00:05 -0800 Subject: mm: propagate error from stack expansion even for guard page Jay Foad reports that the address sanitizer test (asan) sometimes gets confused by a stack pointer that ends up being outside the stack vma that is reported by /proc/maps. This happens due to an interaction between RLIMIT_STACK and the guard page: when we do the guard page check, we ignore the potential error from the stack expansion, which effectively results in a missing guard page, since the expected stack expansion won't have been done. And since /proc/maps explicitly ignores the guard page (commit d7824370e263: "mm: fix up some user-visible effects of the stack guard page"), the stack pointer ends up being outside the reported stack area. This is the minimal patch: it just propagates the error. It also effectively makes the guard page part of the stack limit, which in turn measn that the actual real stack is one page less than the stack limit. Let's see if anybody notices. We could teach acct_stack_growth() to allow an extra page for a grow-up/grow-down stack in the rlimit test, but I don't want to add more complexity if it isn't needed. Reported-and-tested-by: Jay Foad Cc: stable@vger.kernel.org Signed-off-by: Linus Torvalds --- include/linux/mm.h | 2 +- mm/memory.c | 4 ++-- 2 files changed, 3 insertions(+), 3 deletions(-) (limited to 'include/linux') diff --git a/include/linux/mm.h b/include/linux/mm.h index f80d0194c9bc..80fc92a49649 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -1952,7 +1952,7 @@ extern int expand_downwards(struct vm_area_struct *vma, #if VM_GROWSUP extern int expand_upwards(struct vm_area_struct *vma, unsigned long address); #else - #define expand_upwards(vma, address) do { } while (0) + #define expand_upwards(vma, address) (0) #endif /* Look up the first VMA which satisfies addr < vm_end, NULL if none. */ diff --git a/mm/memory.c b/mm/memory.c index ca920d1fd314..d7e497e98f46 100644 --- a/mm/memory.c +++ b/mm/memory.c @@ -2593,7 +2593,7 @@ static inline int check_stack_guard_page(struct vm_area_struct *vma, unsigned lo if (prev && prev->vm_end == address) return prev->vm_flags & VM_GROWSDOWN ? 0 : -ENOMEM; - expand_downwards(vma, address - PAGE_SIZE); + return expand_downwards(vma, address - PAGE_SIZE); } if ((vma->vm_flags & VM_GROWSUP) && address + PAGE_SIZE == vma->vm_end) { struct vm_area_struct *next = vma->vm_next; @@ -2602,7 +2602,7 @@ static inline int check_stack_guard_page(struct vm_area_struct *vma, unsigned lo if (next && next->vm_start == address + PAGE_SIZE) return next->vm_flags & VM_GROWSUP ? 0 : -ENOMEM; - expand_upwards(vma, address + PAGE_SIZE); + return expand_upwards(vma, address + PAGE_SIZE); } return 0; } -- cgit v1.2.3