* [U-Boot] [PATCH 0/2] Replace nios2-generic's gpio.c with dedicated driver.
@ 2011-10-17 15:36 Joachim Foerster
2011-10-17 15:36 ` [U-Boot] [PATCH 1/2] gpio: Add driver for Altera's PIO core Joachim Foerster
2011-10-17 15:36 ` [U-Boot] [PATCH 2/2] board/nios2-generic: Use altera_pio driver and remove board specific driver Joachim Foerster
0 siblings, 2 replies; 10+ messages in thread
From: Joachim Foerster @ 2011-10-17 15:36 UTC (permalink / raw)
To: u-boot
Let's have a dedicated driver for Altera's PIO ip core, which does not
have to be duplicated for each board using PIO.
Joachim Foerster (2):
gpio: Add driver for Altera's PIO core
board/nios2-generic: Use altera_pio driver and remove board specific
driver
arch/nios2/include/asm/gpio.h | 13 +-
board/altera/nios2-generic/Makefile | 1 -
board/altera/nios2-generic/custom_fpga.h | 1 +
board/altera/nios2-generic/gpio.c | 71 -------
board/altera/nios2-generic/nios2-generic.c | 8 +
drivers/gpio/Makefile | 1 +
drivers/gpio/altera_pio.c | 299 ++++++++++++++++++++++++++++
include/configs/nios2-generic.h | 4 +
8 files changed, 324 insertions(+), 74 deletions(-)
delete mode 100644 board/altera/nios2-generic/gpio.c
create mode 100644 drivers/gpio/altera_pio.c
--
1.7.6
^ permalink raw reply [flat|nested] 10+ messages in thread* [U-Boot] [PATCH 1/2] gpio: Add driver for Altera's PIO core 2011-10-17 15:36 [U-Boot] [PATCH 0/2] Replace nios2-generic's gpio.c with dedicated driver Joachim Foerster @ 2011-10-17 15:36 ` Joachim Foerster 2011-10-21 7:21 ` Thomas Chou 2011-10-17 15:36 ` [U-Boot] [PATCH 2/2] board/nios2-generic: Use altera_pio driver and remove board specific driver Joachim Foerster 1 sibling, 1 reply; 10+ messages in thread From: Joachim Foerster @ 2011-10-17 15:36 UTC (permalink / raw) To: u-boot This driver may handle multiple PIO cores and thus needs to be setup by calling the altera_pio_init() function within the early board setup routine. The driver comes with some extras, see below the copyleft header. Signed-off-by: Joachim Foerster <joachim.foerster@missinglinkelectronics.com> --- arch/nios2/include/asm/gpio.h | 13 +- board/altera/nios2-generic/custom_fpga.h | 1 + board/altera/nios2-generic/nios2-generic.c | 8 + drivers/gpio/Makefile | 1 + drivers/gpio/altera_pio.c | 299 ++++++++++++++++++++++++++++ 5 files changed, 320 insertions(+), 2 deletions(-) create mode 100644 drivers/gpio/altera_pio.c diff --git a/arch/nios2/include/asm/gpio.h b/arch/nios2/include/asm/gpio.h index 4b21c8f..908381f 100644 --- a/arch/nios2/include/asm/gpio.h +++ b/arch/nios2/include/asm/gpio.h @@ -5,8 +5,8 @@ * bit[0] data * bit[1] output enable * - * when CONFIG_SYS_GPIO_BASE is not defined, board may provide - * its own driver. + * When CONFIG_SYS_GPIO_BASE is not defined, the board may either + * provide its own driver or the altera_pio driver may be used. * * Copyright (C) 2010 Thomas Chou <thomas@wytron.com.tw> * @@ -58,6 +58,15 @@ static inline int gpio_is_valid(int number) return ((unsigned)number) < CONFIG_SYS_GPIO_WIDTH; } #else +#ifdef CONFIG_ALTERA_PIO +extern int altera_pio_init(u32 base, u8 width, char iot, + u32 rstval, u32 negmask, + const char *label); + +extern void altera_pio_info(void); +#define gpio_status() altera_pio_info() +#endif + extern int gpio_request(unsigned gpio, const char *label); extern int gpio_free(unsigned gpio); extern int gpio_direction_input(unsigned gpio); diff --git a/board/altera/nios2-generic/custom_fpga.h b/board/altera/nios2-generic/custom_fpga.h index f7f3853..fd3ec9a 100644 --- a/board/altera/nios2-generic/custom_fpga.h +++ b/board/altera/nios2-generic/custom_fpga.h @@ -51,6 +51,7 @@ /* led_pio.s1 is a altera_avalon_pio */ #define LED_PIO_BASE 0x82120870 #define LED_PIO_WIDTH 8 +#define LED_PIO_RSTVAL 0x0 /* high_res_timer.s1 is a altera_avalon_timer */ #define CONFIG_SYS_TIMER_BASE 0x82120820 diff --git a/board/altera/nios2-generic/nios2-generic.c b/board/altera/nios2-generic/nios2-generic.c index 49ef80d..0f88275 100644 --- a/board/altera/nios2-generic/nios2-generic.c +++ b/board/altera/nios2-generic/nios2-generic.c @@ -26,6 +26,7 @@ #include <netdev.h> #include <mtd/cfi_flash.h> #include <asm/io.h> +#include <asm/gpio.h> void text_base_hook(void); /* nop hook for text_base.S */ @@ -43,6 +44,13 @@ void early_flash_cmd_reset(void) int board_early_init_f(void) { text_base_hook(); +#ifdef CONFIG_ALTERA_PIO +#ifdef LED_PIO_BASE + altera_pio_init(LED_PIO_BASE, LED_PIO_WIDTH, 'o', + LED_PIO_RSTVAL, (1 << LED_PIO_WIDTH) - 1, + "led"); +#endif +#endif #if defined(CONFIG_ENV_IS_IN_FLASH) && defined(CONFIG_ENV_ADDR) early_flash_cmd_reset(); #endif diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile index beca1da..c874b1a 100644 --- a/drivers/gpio/Makefile +++ b/drivers/gpio/Makefile @@ -34,6 +34,7 @@ COBJS-$(CONFIG_PCA953X) += pca953x.o COBJS-$(CONFIG_S5P) += s5p_gpio.o COBJS-$(CONFIG_TEGRA2_GPIO) += tegra2_gpio.o COBJS-$(CONFIG_DA8XX_GPIO) += da8xx_gpio.o +COBJS-$(CONFIG_ALTERA_PIO) += altera_pio.o COBJS := $(COBJS-y) SRCS := $(COBJS:.o=.c) diff --git a/drivers/gpio/altera_pio.c b/drivers/gpio/altera_pio.c new file mode 100644 index 0000000..1b8c19c --- /dev/null +++ b/drivers/gpio/altera_pio.c @@ -0,0 +1,299 @@ +/* + * Driver for Altera's PIO ip core + * + * Copyright (C) 2011 Missing Link Electronics + * Joachim Foerster <joachim@missinglinkelectronics.com> + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + * + * To use this driver, in your board's config. header: + * #define CONFIG_ALTERA_PIO + * #define CONFIG_SYS_ALTERA_PIO_NUM <number-of-pio-cores> + * #define CONFIG_SYS_ALTERA_PIO_GPIO_NUM <total-number-of-gpios> + * And in your board's early setup routine: + * altera_pio_init(<baseaddr>, <width>, 'i'|'o'|'t', + * <reset-value>, <neg-mask>, "label"); + * - 'i'|'o'|'t': PIO is input-only/output-only/tri-state + * - <reset-value>: for correct initial status display, output-only + * - <neg-mask> is meant to be used to in cases of active-low + * GPIOs, such as LEDs and buttons (on/pressed == 0). Each bit + * which is 1 in <neg-mask> inverts the corresponding GPIO's value + * before set/after get. So: gpio_set_value(gpio, 1) => LED on . + * + * Do NOT define CONFIG_SYS_GPIO_BASE ! + * + * Optionally, in your board's config. header: + * - To force a GPIO numbering scheme like in Linux ... + * #define CONFIG_GPIO_DOWNTO_NUMBERING + * ... starting with 255 (default) + * #define CONFIG_GPIO_DOWNTO_MAX 255 + */ +#include <common.h> +#include <asm/io.h> +#include <asm/gpio.h> + +#ifdef CONFIG_GPIO_DOWNTO_NUMBERING +#ifndef CONFIG_GPIO_DOWNTO_MAX +#define CONFIG_GPIO_DOWNTO_MAX 255 +#endif +#endif + +#define ALTERA_PIO_DATA 0x0 +#define ALTERA_PIO_DIR 0x4 + +#define GPIO_LABEL_SIZE 9 + + +static struct altera_pio { + u32 base; + u8 width; + char iot; + u32 negmask; + u32 sh_data; + u32 sh_dir; + int gidx; + char label[GPIO_LABEL_SIZE]; +} pios[CONFIG_SYS_ALTERA_PIO_NUM]; + +static int pio_num = 0; + +static struct altera_pio_gpio { + unsigned num; + struct altera_pio *pio; + char reqlabel[GPIO_LABEL_SIZE]; +} gpios[CONFIG_SYS_ALTERA_PIO_GPIO_NUM]; + +static int pio_gpio_num = 0; + + +static int altera_pio_gidx(unsigned gpio) +{ + int i; + + for (i = 0; i < pio_gpio_num; ++i) { + if (gpio == gpios[i].num) + break; + } + if (i >= pio_gpio_num) + return -1; + return i; +} + +static struct altera_pio *altera_pio_get_and_mask(unsigned gpio, u32 *mask) +{ + int gidx = altera_pio_gidx(gpio); + if (gidx < 0) + return NULL; + if (mask) + *mask = 1 << (gidx - gpios[gidx].pio->gidx); + return gpios[gidx].pio; +} + +#define altera_pio_use_gidx(_gidx, _reqlabel) \ + { strncpy(gpios[_gidx].reqlabel, _reqlabel, GPIO_LABEL_SIZE); } +#define altera_pio_unuse_gidx(_gidx) { gpios[_gidx].reqlabel[0] = '\0'; } +#define altera_pio_is_gidx_used(_gidx) (gpios[_gidx].reqlabel[0] != '\0') + +static int altera_pio_gpio_init(struct altera_pio *pio, u8 width) +{ + u8 gidx = pio_gpio_num; + int i; + + if (!width) + return -1; + if ((pio_gpio_num + width) > CONFIG_SYS_ALTERA_PIO_GPIO_NUM) + return -1; + + for (i = 0; i < width; ++i) { +#ifdef CONFIG_GPIO_DOWNTO_NUMBERING + gpios[pio_gpio_num + i].num = \ + CONFIG_GPIO_DOWNTO_MAX + 1 - gidx - width + i; +#else + gpios[pio_gpio_num + i].num = pio_gpio_num + i; +#endif + gpios[pio_gpio_num + i].pio = pio; + altera_pio_unuse_gidx(pio_gpio_num + i); + } + pio_gpio_num += width; + return gidx; +} + +int altera_pio_init(u32 base, u8 width, char iot, u32 rstval, u32 negmask, + const char *label) +{ + if (pio_num >= CONFIG_SYS_ALTERA_PIO_NUM) + return -1; + + pios[pio_num].base = base; + pios[pio_num].width = width; + pios[pio_num].iot = iot; + switch (iot) { + case 'i': + /* input only */ + pios[pio_num].sh_dir = 0; + pios[pio_num].sh_data = readl(base + ALTERA_PIO_DATA); + break; + case 'o': + /* output only */ + pios[pio_num].sh_dir = 0xffffffff & ((1 << width) - 1); + pios[pio_num].sh_data = rstval; + break; + case 't': + /* bidir, tri-state */ + pios[pio_num].sh_dir = readl(base + ALTERA_PIO_DIR); + pios[pio_num].sh_data = readl(base + ALTERA_PIO_DATA); + break; + default: + return -1; + } + pios[pio_num].negmask = negmask & ((1 << width) - 1); + pios[pio_num].gidx = altera_pio_gpio_init(&pios[pio_num], width); + if (pios[pio_num].gidx < 0) + return -1; + strncpy(pios[pio_num].label, label, GPIO_LABEL_SIZE); + return pio_num++; +} + +void altera_pio_info(void) +{ + int i; + int j; + int gidx; + u32 mask; + + for (i = 0; i < pio_num; ++i) { + printf("Altera PIO % 2d, @0x%08x, " + "width: %u, label: %s\n", + i, pios[i].base, pios[i].width, pios[i].label); + gidx = pios[i].gidx; + for (j = gidx; j < (gidx + pios[i].width); ++j) { + mask = 1 << (j - gidx); + printf("\tGPIO % 4u: %s %s [%c] %s\n", + gpios[j].num, + gpios[j].pio->sh_dir & mask ? "out" : " in", + gpio_get_value(gpios[j].num) ? "set" : "clr", + altera_pio_is_gidx_used(j) ? 'x' : ' ', + gpios[j].reqlabel); + } + } +} + + +int gpio_request(unsigned gpio, const char *label) +{ + int gidx = altera_pio_gidx(gpio); + if (gidx < 0) + return gidx; + if (altera_pio_is_gidx_used(gidx)) + return -1; + + altera_pio_use_gidx(gidx, label); + return 0; +} + +int gpio_free(unsigned gpio) +{ + int gidx = altera_pio_gidx(gpio); + if (gidx < 0) + return gidx; + if (!altera_pio_is_gidx_used(gidx)) + return -1; + + altera_pio_unuse_gidx(gidx); + return 0; +} + +int gpio_direction_input(unsigned gpio) +{ + u32 mask; + struct altera_pio *pio; + + pio = altera_pio_get_and_mask(gpio, &mask); + if (!pio) + return -1; + if (pio->iot == 'o') + return -1; + + writel(pio->sh_dir &= ~mask, pio->base + ALTERA_PIO_DIR); + return 0; +} + +int gpio_direction_output(unsigned gpio, int value) +{ + u32 mask; + struct altera_pio *pio; + + pio = altera_pio_get_and_mask(gpio, &mask); + if (!pio) + return -1; + if (pio->iot == 'i') + return -1; + + value = (pio->negmask & mask) ? !value : value; + if (value) + pio->sh_data |= mask; + else + pio->sh_data &= ~mask; + writel(pio->sh_data, pio->base + ALTERA_PIO_DATA); + writel(pio->sh_dir |= mask, pio->base + ALTERA_PIO_DIR); + return 0; +} + +int gpio_get_value(unsigned gpio) +{ + u32 mask; + struct altera_pio *pio; + u32 val; + + pio = altera_pio_get_and_mask(gpio, &mask); + if (!pio) + return -1; + + if ((pio->sh_dir & mask) || (pio->iot == 'o')) + val = pio->sh_data & mask; + else + val = readl(pio->base + ALTERA_PIO_DATA) & mask; + return (pio->negmask & mask) ? !val : val; +} + +void gpio_set_value(unsigned gpio, int value) +{ + u32 mask; + struct altera_pio *pio; + + pio = altera_pio_get_and_mask(gpio, &mask); + if (!pio) + return; + if (pio->iot == 'i') + return; + + value = (pio->negmask & mask) ? !value : value; + if (value) + pio->sh_data |= mask; + else + pio->sh_data &= ~mask; + writel(pio->sh_data, pio->base + ALTERA_PIO_DATA); + return; +} + +int gpio_is_valid(int number) +{ + int gidx = altera_pio_gidx(number); + + if (gidx < 0) + return 1; + return 0; +} -- 1.7.6 ^ permalink raw reply related [flat|nested] 10+ messages in thread
* [U-Boot] [PATCH 1/2] gpio: Add driver for Altera's PIO core 2011-10-17 15:36 ` [U-Boot] [PATCH 1/2] gpio: Add driver for Altera's PIO core Joachim Foerster @ 2011-10-21 7:21 ` Thomas Chou 2011-10-21 13:48 ` [U-Boot] [PATCH 0/2] Replace nios2-generic's gpio.c with dedicated driver Joachim Foerster 2011-10-21 13:49 ` [U-Boot] [PATCH 1/2] gpio: Add driver for Altera's PIO core Joachim Foerster 0 siblings, 2 replies; 10+ messages in thread From: Thomas Chou @ 2011-10-21 7:21 UTC (permalink / raw) To: u-boot On 10/17/2011 11:36 PM, Joachim Foerster wrote: > This driver may handle multiple PIO cores and thus needs to be > setup by calling the altera_pio_init() function within the early > board setup routine. > > The driver comes with some extras, see below the copyleft header. > > Signed-off-by: Joachim Foerster<joachim.foerster@missinglinkelectronics.com> > --- > arch/nios2/include/asm/gpio.h | 13 +- > board/altera/nios2-generic/custom_fpga.h | 1 + > board/altera/nios2-generic/nios2-generic.c | 8 + > drivers/gpio/Makefile | 1 + > drivers/gpio/altera_pio.c | 299 ++++++++++++++++++++++++++++ > 5 files changed, 320 insertions(+), 2 deletions(-) > create mode 100644 drivers/gpio/altera_pio.c Hi Joachim, Please fix these warning. Thanks. $ ./MAKEALL nios2-generic Configuring for nios2-generic board... altera_pio.c: In function `altera_pio_info': altera_pio.c:189: warning: ` ' flag used with `%u' printf format checkpatch.pl ERROR: do not initialise statics to 0 or NULL #209: FILE: drivers/gpio/altera_pio.c:71: +static int pio_num = 0; ERROR: do not initialise statics to 0 or NULL #217: FILE: drivers/gpio/altera_pio.c:79: +static int pio_gpio_num = 0; Otherwise, Tested-by: Thomas Chou <thomas@wytron.com.tw> Best regards, Thomas ^ permalink raw reply [flat|nested] 10+ messages in thread
* [U-Boot] [PATCH 0/2] Replace nios2-generic's gpio.c with dedicated driver. 2011-10-21 7:21 ` Thomas Chou @ 2011-10-21 13:48 ` Joachim Foerster 2011-10-21 13:48 ` [U-Boot] [PATCH 1/2 v2] gpio: Add driver for Altera's PIO core Joachim Foerster 2011-10-21 13:48 ` [U-Boot] [PATCH 2/2 v2] board/nios2-generic: Use altera_pio driver and remove board specific driver Joachim Foerster 2011-10-21 13:49 ` [U-Boot] [PATCH 1/2] gpio: Add driver for Altera's PIO core Joachim Foerster 1 sibling, 2 replies; 10+ messages in thread From: Joachim Foerster @ 2011-10-21 13:48 UTC (permalink / raw) To: u-boot Let's have a dedicated driver for Altera's PIO ip core, which does not have to be duplicated for each board using PIO. Joachim Foerster (2): gpio: Add driver for Altera's PIO core board/nios2-generic: Use altera_pio driver and remove board specific driver Changes for v2: PATCH 1/2: - get rid of checkpatch warnings about init.ing static - use %d instead of %u together the usage of the space-flag PATCH 2/2: nothing arch/nios2/include/asm/gpio.h | 13 +- board/altera/nios2-generic/Makefile | 1 - board/altera/nios2-generic/custom_fpga.h | 1 + board/altera/nios2-generic/gpio.c | 71 ------- board/altera/nios2-generic/nios2-generic.c | 8 + drivers/gpio/Makefile | 1 + drivers/gpio/altera_pio.c | 299 ++++++++++++++++++++++++++++ include/configs/nios2-generic.h | 4 + 8 files changed, 324 insertions(+), 74 deletions(-) delete mode 100644 board/altera/nios2-generic/gpio.c create mode 100644 drivers/gpio/altera_pio.c -- 1.7.6 ^ permalink raw reply [flat|nested] 10+ messages in thread
* [U-Boot] [PATCH 1/2 v2] gpio: Add driver for Altera's PIO core 2011-10-21 13:48 ` [U-Boot] [PATCH 0/2] Replace nios2-generic's gpio.c with dedicated driver Joachim Foerster @ 2011-10-21 13:48 ` Joachim Foerster 2011-10-28 7:29 ` Thomas Chou 2011-10-21 13:48 ` [U-Boot] [PATCH 2/2 v2] board/nios2-generic: Use altera_pio driver and remove board specific driver Joachim Foerster 1 sibling, 1 reply; 10+ messages in thread From: Joachim Foerster @ 2011-10-21 13:48 UTC (permalink / raw) To: u-boot This driver may handle multiple PIO cores and thus needs to be setup by calling the altera_pio_init() function within the early board setup routine. The driver comes with some extras, see below the copyleft header. Signed-off-by: Joachim Foerster <joachim.foerster@missinglinkelectronics.com> Tested-by: Thomas Chou <thomas@wytron.com.tw> --- arch/nios2/include/asm/gpio.h | 13 +- board/altera/nios2-generic/custom_fpga.h | 1 + board/altera/nios2-generic/nios2-generic.c | 8 + drivers/gpio/Makefile | 1 + drivers/gpio/altera_pio.c | 299 ++++++++++++++++++++++++++++ 5 files changed, 320 insertions(+), 2 deletions(-) create mode 100644 drivers/gpio/altera_pio.c diff --git a/arch/nios2/include/asm/gpio.h b/arch/nios2/include/asm/gpio.h index 4b21c8f..908381f 100644 --- a/arch/nios2/include/asm/gpio.h +++ b/arch/nios2/include/asm/gpio.h @@ -5,8 +5,8 @@ * bit[0] data * bit[1] output enable * - * when CONFIG_SYS_GPIO_BASE is not defined, board may provide - * its own driver. + * When CONFIG_SYS_GPIO_BASE is not defined, the board may either + * provide its own driver or the altera_pio driver may be used. * * Copyright (C) 2010 Thomas Chou <thomas@wytron.com.tw> * @@ -58,6 +58,15 @@ static inline int gpio_is_valid(int number) return ((unsigned)number) < CONFIG_SYS_GPIO_WIDTH; } #else +#ifdef CONFIG_ALTERA_PIO +extern int altera_pio_init(u32 base, u8 width, char iot, + u32 rstval, u32 negmask, + const char *label); + +extern void altera_pio_info(void); +#define gpio_status() altera_pio_info() +#endif + extern int gpio_request(unsigned gpio, const char *label); extern int gpio_free(unsigned gpio); extern int gpio_direction_input(unsigned gpio); diff --git a/board/altera/nios2-generic/custom_fpga.h b/board/altera/nios2-generic/custom_fpga.h index f7f3853..fd3ec9a 100644 --- a/board/altera/nios2-generic/custom_fpga.h +++ b/board/altera/nios2-generic/custom_fpga.h @@ -51,6 +51,7 @@ /* led_pio.s1 is a altera_avalon_pio */ #define LED_PIO_BASE 0x82120870 #define LED_PIO_WIDTH 8 +#define LED_PIO_RSTVAL 0x0 /* high_res_timer.s1 is a altera_avalon_timer */ #define CONFIG_SYS_TIMER_BASE 0x82120820 diff --git a/board/altera/nios2-generic/nios2-generic.c b/board/altera/nios2-generic/nios2-generic.c index 49ef80d..0f88275 100644 --- a/board/altera/nios2-generic/nios2-generic.c +++ b/board/altera/nios2-generic/nios2-generic.c @@ -26,6 +26,7 @@ #include <netdev.h> #include <mtd/cfi_flash.h> #include <asm/io.h> +#include <asm/gpio.h> void text_base_hook(void); /* nop hook for text_base.S */ @@ -43,6 +44,13 @@ void early_flash_cmd_reset(void) int board_early_init_f(void) { text_base_hook(); +#ifdef CONFIG_ALTERA_PIO +#ifdef LED_PIO_BASE + altera_pio_init(LED_PIO_BASE, LED_PIO_WIDTH, 'o', + LED_PIO_RSTVAL, (1 << LED_PIO_WIDTH) - 1, + "led"); +#endif +#endif #if defined(CONFIG_ENV_IS_IN_FLASH) && defined(CONFIG_ENV_ADDR) early_flash_cmd_reset(); #endif diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile index beca1da..c874b1a 100644 --- a/drivers/gpio/Makefile +++ b/drivers/gpio/Makefile @@ -34,6 +34,7 @@ COBJS-$(CONFIG_PCA953X) += pca953x.o COBJS-$(CONFIG_S5P) += s5p_gpio.o COBJS-$(CONFIG_TEGRA2_GPIO) += tegra2_gpio.o COBJS-$(CONFIG_DA8XX_GPIO) += da8xx_gpio.o +COBJS-$(CONFIG_ALTERA_PIO) += altera_pio.o COBJS := $(COBJS-y) SRCS := $(COBJS:.o=.c) diff --git a/drivers/gpio/altera_pio.c b/drivers/gpio/altera_pio.c new file mode 100644 index 0000000..fb03760 --- /dev/null +++ b/drivers/gpio/altera_pio.c @@ -0,0 +1,299 @@ +/* + * Driver for Altera's PIO ip core + * + * Copyright (C) 2011 Missing Link Electronics + * Joachim Foerster <joachim@missinglinkelectronics.com> + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + * + * To use this driver, in your board's config. header: + * #define CONFIG_ALTERA_PIO + * #define CONFIG_SYS_ALTERA_PIO_NUM <number-of-pio-cores> + * #define CONFIG_SYS_ALTERA_PIO_GPIO_NUM <total-number-of-gpios> + * And in your board's early setup routine: + * altera_pio_init(<baseaddr>, <width>, 'i'|'o'|'t', + * <reset-value>, <neg-mask>, "label"); + * - 'i'|'o'|'t': PIO is input-only/output-only/tri-state + * - <reset-value>: for correct initial status display, output-only + * - <neg-mask> is meant to be used to in cases of active-low + * GPIOs, such as LEDs and buttons (on/pressed == 0). Each bit + * which is 1 in <neg-mask> inverts the corresponding GPIO's value + * before set/after get. So: gpio_set_value(gpio, 1) => LED on . + * + * Do NOT define CONFIG_SYS_GPIO_BASE ! + * + * Optionally, in your board's config. header: + * - To force a GPIO numbering scheme like in Linux ... + * #define CONFIG_GPIO_DOWNTO_NUMBERING + * ... starting with 255 (default) + * #define CONFIG_GPIO_DOWNTO_MAX 255 + */ +#include <common.h> +#include <asm/io.h> +#include <asm/gpio.h> + +#ifdef CONFIG_GPIO_DOWNTO_NUMBERING +#ifndef CONFIG_GPIO_DOWNTO_MAX +#define CONFIG_GPIO_DOWNTO_MAX 255 +#endif +#endif + +#define ALTERA_PIO_DATA 0x0 +#define ALTERA_PIO_DIR 0x4 + +#define GPIO_LABEL_SIZE 9 + + +static struct altera_pio { + u32 base; + u8 width; + char iot; + u32 negmask; + u32 sh_data; + u32 sh_dir; + int gidx; + char label[GPIO_LABEL_SIZE]; +} pios[CONFIG_SYS_ALTERA_PIO_NUM]; + +static int pio_num; + +static struct altera_pio_gpio { + unsigned num; + struct altera_pio *pio; + char reqlabel[GPIO_LABEL_SIZE]; +} gpios[CONFIG_SYS_ALTERA_PIO_GPIO_NUM]; + +static int pio_gpio_num; + + +static int altera_pio_gidx(unsigned gpio) +{ + int i; + + for (i = 0; i < pio_gpio_num; ++i) { + if (gpio == gpios[i].num) + break; + } + if (i >= pio_gpio_num) + return -1; + return i; +} + +static struct altera_pio *altera_pio_get_and_mask(unsigned gpio, u32 *mask) +{ + int gidx = altera_pio_gidx(gpio); + if (gidx < 0) + return NULL; + if (mask) + *mask = 1 << (gidx - gpios[gidx].pio->gidx); + return gpios[gidx].pio; +} + +#define altera_pio_use_gidx(_gidx, _reqlabel) \ + { strncpy(gpios[_gidx].reqlabel, _reqlabel, GPIO_LABEL_SIZE); } +#define altera_pio_unuse_gidx(_gidx) { gpios[_gidx].reqlabel[0] = '\0'; } +#define altera_pio_is_gidx_used(_gidx) (gpios[_gidx].reqlabel[0] != '\0') + +static int altera_pio_gpio_init(struct altera_pio *pio, u8 width) +{ + u8 gidx = pio_gpio_num; + int i; + + if (!width) + return -1; + if ((pio_gpio_num + width) > CONFIG_SYS_ALTERA_PIO_GPIO_NUM) + return -1; + + for (i = 0; i < width; ++i) { +#ifdef CONFIG_GPIO_DOWNTO_NUMBERING + gpios[pio_gpio_num + i].num = \ + CONFIG_GPIO_DOWNTO_MAX + 1 - gidx - width + i; +#else + gpios[pio_gpio_num + i].num = pio_gpio_num + i; +#endif + gpios[pio_gpio_num + i].pio = pio; + altera_pio_unuse_gidx(pio_gpio_num + i); + } + pio_gpio_num += width; + return gidx; +} + +int altera_pio_init(u32 base, u8 width, char iot, u32 rstval, u32 negmask, + const char *label) +{ + if (pio_num >= CONFIG_SYS_ALTERA_PIO_NUM) + return -1; + + pios[pio_num].base = base; + pios[pio_num].width = width; + pios[pio_num].iot = iot; + switch (iot) { + case 'i': + /* input only */ + pios[pio_num].sh_dir = 0; + pios[pio_num].sh_data = readl(base + ALTERA_PIO_DATA); + break; + case 'o': + /* output only */ + pios[pio_num].sh_dir = 0xffffffff & ((1 << width) - 1); + pios[pio_num].sh_data = rstval; + break; + case 't': + /* bidir, tri-state */ + pios[pio_num].sh_dir = readl(base + ALTERA_PIO_DIR); + pios[pio_num].sh_data = readl(base + ALTERA_PIO_DATA); + break; + default: + return -1; + } + pios[pio_num].negmask = negmask & ((1 << width) - 1); + pios[pio_num].gidx = altera_pio_gpio_init(&pios[pio_num], width); + if (pios[pio_num].gidx < 0) + return -1; + strncpy(pios[pio_num].label, label, GPIO_LABEL_SIZE); + return pio_num++; +} + +void altera_pio_info(void) +{ + int i; + int j; + int gidx; + u32 mask; + + for (i = 0; i < pio_num; ++i) { + printf("Altera PIO % 2d, @0x%08x, " + "width: %u, label: %s\n", + i, pios[i].base, pios[i].width, pios[i].label); + gidx = pios[i].gidx; + for (j = gidx; j < (gidx + pios[i].width); ++j) { + mask = 1 << (j - gidx); + printf("\tGPIO % 4d: %s %s [%c] %s\n", + gpios[j].num, + gpios[j].pio->sh_dir & mask ? "out" : " in", + gpio_get_value(gpios[j].num) ? "set" : "clr", + altera_pio_is_gidx_used(j) ? 'x' : ' ', + gpios[j].reqlabel); + } + } +} + + +int gpio_request(unsigned gpio, const char *label) +{ + int gidx = altera_pio_gidx(gpio); + if (gidx < 0) + return gidx; + if (altera_pio_is_gidx_used(gidx)) + return -1; + + altera_pio_use_gidx(gidx, label); + return 0; +} + +int gpio_free(unsigned gpio) +{ + int gidx = altera_pio_gidx(gpio); + if (gidx < 0) + return gidx; + if (!altera_pio_is_gidx_used(gidx)) + return -1; + + altera_pio_unuse_gidx(gidx); + return 0; +} + +int gpio_direction_input(unsigned gpio) +{ + u32 mask; + struct altera_pio *pio; + + pio = altera_pio_get_and_mask(gpio, &mask); + if (!pio) + return -1; + if (pio->iot == 'o') + return -1; + + writel(pio->sh_dir &= ~mask, pio->base + ALTERA_PIO_DIR); + return 0; +} + +int gpio_direction_output(unsigned gpio, int value) +{ + u32 mask; + struct altera_pio *pio; + + pio = altera_pio_get_and_mask(gpio, &mask); + if (!pio) + return -1; + if (pio->iot == 'i') + return -1; + + value = (pio->negmask & mask) ? !value : value; + if (value) + pio->sh_data |= mask; + else + pio->sh_data &= ~mask; + writel(pio->sh_data, pio->base + ALTERA_PIO_DATA); + writel(pio->sh_dir |= mask, pio->base + ALTERA_PIO_DIR); + return 0; +} + +int gpio_get_value(unsigned gpio) +{ + u32 mask; + struct altera_pio *pio; + u32 val; + + pio = altera_pio_get_and_mask(gpio, &mask); + if (!pio) + return -1; + + if ((pio->sh_dir & mask) || (pio->iot == 'o')) + val = pio->sh_data & mask; + else + val = readl(pio->base + ALTERA_PIO_DATA) & mask; + return (pio->negmask & mask) ? !val : val; +} + +void gpio_set_value(unsigned gpio, int value) +{ + u32 mask; + struct altera_pio *pio; + + pio = altera_pio_get_and_mask(gpio, &mask); + if (!pio) + return; + if (pio->iot == 'i') + return; + + value = (pio->negmask & mask) ? !value : value; + if (value) + pio->sh_data |= mask; + else + pio->sh_data &= ~mask; + writel(pio->sh_data, pio->base + ALTERA_PIO_DATA); + return; +} + +int gpio_is_valid(int number) +{ + int gidx = altera_pio_gidx(number); + + if (gidx < 0) + return 1; + return 0; +} -- 1.7.6 ^ permalink raw reply related [flat|nested] 10+ messages in thread
* [U-Boot] [PATCH 1/2 v2] gpio: Add driver for Altera's PIO core 2011-10-21 13:48 ` [U-Boot] [PATCH 1/2 v2] gpio: Add driver for Altera's PIO core Joachim Foerster @ 2011-10-28 7:29 ` Thomas Chou 0 siblings, 0 replies; 10+ messages in thread From: Thomas Chou @ 2011-10-28 7:29 UTC (permalink / raw) To: u-boot On 10/21/2011 09:48 PM, Joachim Foerster wrote: > This driver may handle multiple PIO cores and thus needs to be > setup by calling the altera_pio_init() function within the early > board setup routine. > > The driver comes with some extras, see below the copyleft header. > > Signed-off-by: Joachim Foerster<joachim.foerster@missinglinkelectronics.com> > Tested-by: Thomas Chou<thomas@wytron.com.tw> > --- > arch/nios2/include/asm/gpio.h | 13 +- > board/altera/nios2-generic/custom_fpga.h | 1 + > board/altera/nios2-generic/nios2-generic.c | 8 + > drivers/gpio/Makefile | 1 + > drivers/gpio/altera_pio.c | 299 ++++++++++++++++++++++++++++ > 5 files changed, 320 insertions(+), 2 deletions(-) > create mode 100644 drivers/gpio/altera_pio.c Hi Joachim, Applied. Thanks. Best regards, Thomas ^ permalink raw reply [flat|nested] 10+ messages in thread
* [U-Boot] [PATCH 2/2 v2] board/nios2-generic: Use altera_pio driver and remove board specific driver 2011-10-21 13:48 ` [U-Boot] [PATCH 0/2] Replace nios2-generic's gpio.c with dedicated driver Joachim Foerster 2011-10-21 13:48 ` [U-Boot] [PATCH 1/2 v2] gpio: Add driver for Altera's PIO core Joachim Foerster @ 2011-10-21 13:48 ` Joachim Foerster 2011-10-28 7:29 ` Thomas Chou 1 sibling, 1 reply; 10+ messages in thread From: Joachim Foerster @ 2011-10-21 13:48 UTC (permalink / raw) To: u-boot Signed-off-by: Joachim Foerster <joachim.foerster@missinglinkelectronics.com> --- board/altera/nios2-generic/Makefile | 1 - board/altera/nios2-generic/gpio.c | 71 ----------------------------------- include/configs/nios2-generic.h | 4 ++ 3 files changed, 4 insertions(+), 72 deletions(-) delete mode 100644 board/altera/nios2-generic/gpio.c diff --git a/board/altera/nios2-generic/Makefile b/board/altera/nios2-generic/Makefile index 359f590..59fd465 100644 --- a/board/altera/nios2-generic/Makefile +++ b/board/altera/nios2-generic/Makefile @@ -32,7 +32,6 @@ LIB = $(obj)lib$(BOARD).o COBJS-y := $(BOARD).o COBJS-$(CONFIG_CMD_IDE) += ../common/cfide.o COBJS-$(CONFIG_EPLED) += ../common/epled.o -COBJS-$(CONFIG_GPIO) += gpio.o COBJS-$(CONFIG_SEVENSEG) += ../common/sevenseg.o SOBJS-y := text_base.o diff --git a/board/altera/nios2-generic/gpio.c b/board/altera/nios2-generic/gpio.c deleted file mode 100644 index 4a30564..0000000 --- a/board/altera/nios2-generic/gpio.c +++ /dev/null @@ -1,71 +0,0 @@ -/* - * board gpio driver - * - * Copyright (C) 2010 Thomas Chou <thomas@wytron.com.tw> - * Licensed under the GPL-2 or later. - */ -#include <common.h> -#include <asm/io.h> - -#ifndef CONFIG_SYS_GPIO_BASE - -#define ALTERA_PIO_BASE LED_PIO_BASE -#define ALTERA_PIO_WIDTH LED_PIO_WIDTH -#define ALTERA_PIO_DATA (ALTERA_PIO_BASE + 0) -#define ALTERA_PIO_DIR (ALTERA_PIO_BASE + 4) -static u32 pio_data_reg; -static u32 pio_dir_reg; - -int gpio_request(unsigned gpio, const char *label) -{ - return 0; -} - -int gpio_free(unsigned gpio) -{ - return 0; -} - -int gpio_direction_input(unsigned gpio) -{ - u32 mask = 1 << gpio; - writel(pio_dir_reg &= ~mask, ALTERA_PIO_DIR); - return 0; -} - -int gpio_direction_output(unsigned gpio, int value) -{ - u32 mask = 1 << gpio; - if (value) - pio_data_reg |= mask; - else - pio_data_reg &= ~mask; - writel(pio_data_reg, ALTERA_PIO_DATA); - writel(pio_dir_reg |= mask, ALTERA_PIO_DIR); - return 0; -} - -int gpio_get_value(unsigned gpio) -{ - u32 mask = 1 << gpio; - if (pio_dir_reg & mask) - return (pio_data_reg & mask) ? 1 : 0; - else - return (readl(ALTERA_PIO_DATA) & mask) ? 1 : 0; -} - -void gpio_set_value(unsigned gpio, int value) -{ - u32 mask = 1 << gpio; - if (value) - pio_data_reg |= mask; - else - pio_data_reg &= ~mask; - writel(pio_data_reg, ALTERA_PIO_DATA); -} - -int gpio_is_valid(int number) -{ - return ((unsigned)number) < ALTERA_PIO_WIDTH; -} -#endif diff --git a/include/configs/nios2-generic.h b/include/configs/nios2-generic.h index 1395939..9ba35e8 100644 --- a/include/configs/nios2-generic.h +++ b/include/configs/nios2-generic.h @@ -63,6 +63,10 @@ /* * STATUS LED */ +#define CONFIG_ALTERA_PIO +#define CONFIG_SYS_ALTERA_PIO_NUM 1 +#define CONFIG_SYS_ALTERA_PIO_GPIO_NUM LED_PIO_WIDTH + #define CONFIG_STATUS_LED /* Enable status driver */ #define CONFIG_GPIO_LED /* Enable GPIO LED driver */ #define CONFIG_GPIO /* Enable GPIO driver */ -- 1.7.6 ^ permalink raw reply related [flat|nested] 10+ messages in thread
* [U-Boot] [PATCH 2/2 v2] board/nios2-generic: Use altera_pio driver and remove board specific driver 2011-10-21 13:48 ` [U-Boot] [PATCH 2/2 v2] board/nios2-generic: Use altera_pio driver and remove board specific driver Joachim Foerster @ 2011-10-28 7:29 ` Thomas Chou 0 siblings, 0 replies; 10+ messages in thread From: Thomas Chou @ 2011-10-28 7:29 UTC (permalink / raw) To: u-boot On 10/21/2011 09:48 PM, Joachim Foerster wrote: > Signed-off-by: Joachim Foerster<joachim.foerster@missinglinkelectronics.com> > --- > board/altera/nios2-generic/Makefile | 1 - > board/altera/nios2-generic/gpio.c | 71 ----------------------------------- > include/configs/nios2-generic.h | 4 ++ > 3 files changed, 4 insertions(+), 72 deletions(-) > delete mode 100644 board/altera/nios2-generic/gpio.c Hi Joachim, Applied. Thanks. Best regards, Thomas ^ permalink raw reply [flat|nested] 10+ messages in thread
* [U-Boot] [PATCH 1/2] gpio: Add driver for Altera's PIO core 2011-10-21 7:21 ` Thomas Chou 2011-10-21 13:48 ` [U-Boot] [PATCH 0/2] Replace nios2-generic's gpio.c with dedicated driver Joachim Foerster @ 2011-10-21 13:49 ` Joachim Foerster 1 sibling, 0 replies; 10+ messages in thread From: Joachim Foerster @ 2011-10-21 13:49 UTC (permalink / raw) To: u-boot On 10/21/2011 09:21 AM, Thomas Chou wrote: > On 10/17/2011 11:36 PM, Joachim Foerster wrote: >> This driver may handle multiple PIO cores and thus needs to be >> setup by calling the altera_pio_init() function within the early >> board setup routine. >> >> The driver comes with some extras, see below the copyleft header. >> >> Signed-off-by: Joachim >> Foerster<joachim.foerster@missinglinkelectronics.com> >> --- >> arch/nios2/include/asm/gpio.h | 13 +- >> board/altera/nios2-generic/custom_fpga.h | 1 + >> board/altera/nios2-generic/nios2-generic.c | 8 + >> drivers/gpio/Makefile | 1 + >> drivers/gpio/altera_pio.c | 299 ++++++++++++++++++++++++++++ >> 5 files changed, 320 insertions(+), 2 deletions(-) >> create mode 100644 drivers/gpio/altera_pio.c > > Hi Joachim, > > Please fix these warning. Thanks. > > $ ./MAKEALL nios2-generic > Configuring for nios2-generic board... > altera_pio.c: In function `altera_pio_info': > altera_pio.c:189: warning: ` ' flag used with `%u' printf format Ok, I'll use %d - in this case it is the same. Does anybody know why %u warns about space-flag usage? Is space-flag + %u indeed evil ? > Otherwise, > Tested-by: Thomas Chou <thomas@wytron.com.tw> > > Best regards, > Thomas Thanks for reviewing. -- Joachim Foerster Missing Link Electronics http://www.missinglinkelectronics.com Office EU: +49 (731) 141-149-0 Office US: +1 (408) 457-0700 email: joachim.foerster at missinglinkelectronics.com ^ permalink raw reply [flat|nested] 10+ messages in thread
* [U-Boot] [PATCH 2/2] board/nios2-generic: Use altera_pio driver and remove board specific driver 2011-10-17 15:36 [U-Boot] [PATCH 0/2] Replace nios2-generic's gpio.c with dedicated driver Joachim Foerster 2011-10-17 15:36 ` [U-Boot] [PATCH 1/2] gpio: Add driver for Altera's PIO core Joachim Foerster @ 2011-10-17 15:36 ` Joachim Foerster 1 sibling, 0 replies; 10+ messages in thread From: Joachim Foerster @ 2011-10-17 15:36 UTC (permalink / raw) To: u-boot Signed-off-by: Joachim Foerster <joachim.foerster@missinglinkelectronics.com> --- board/altera/nios2-generic/Makefile | 1 - board/altera/nios2-generic/gpio.c | 71 ----------------------------------- include/configs/nios2-generic.h | 4 ++ 3 files changed, 4 insertions(+), 72 deletions(-) delete mode 100644 board/altera/nios2-generic/gpio.c diff --git a/board/altera/nios2-generic/Makefile b/board/altera/nios2-generic/Makefile index 359f590..59fd465 100644 --- a/board/altera/nios2-generic/Makefile +++ b/board/altera/nios2-generic/Makefile @@ -32,7 +32,6 @@ LIB = $(obj)lib$(BOARD).o COBJS-y := $(BOARD).o COBJS-$(CONFIG_CMD_IDE) += ../common/cfide.o COBJS-$(CONFIG_EPLED) += ../common/epled.o -COBJS-$(CONFIG_GPIO) += gpio.o COBJS-$(CONFIG_SEVENSEG) += ../common/sevenseg.o SOBJS-y := text_base.o diff --git a/board/altera/nios2-generic/gpio.c b/board/altera/nios2-generic/gpio.c deleted file mode 100644 index 4a30564..0000000 --- a/board/altera/nios2-generic/gpio.c +++ /dev/null @@ -1,71 +0,0 @@ -/* - * board gpio driver - * - * Copyright (C) 2010 Thomas Chou <thomas@wytron.com.tw> - * Licensed under the GPL-2 or later. - */ -#include <common.h> -#include <asm/io.h> - -#ifndef CONFIG_SYS_GPIO_BASE - -#define ALTERA_PIO_BASE LED_PIO_BASE -#define ALTERA_PIO_WIDTH LED_PIO_WIDTH -#define ALTERA_PIO_DATA (ALTERA_PIO_BASE + 0) -#define ALTERA_PIO_DIR (ALTERA_PIO_BASE + 4) -static u32 pio_data_reg; -static u32 pio_dir_reg; - -int gpio_request(unsigned gpio, const char *label) -{ - return 0; -} - -int gpio_free(unsigned gpio) -{ - return 0; -} - -int gpio_direction_input(unsigned gpio) -{ - u32 mask = 1 << gpio; - writel(pio_dir_reg &= ~mask, ALTERA_PIO_DIR); - return 0; -} - -int gpio_direction_output(unsigned gpio, int value) -{ - u32 mask = 1 << gpio; - if (value) - pio_data_reg |= mask; - else - pio_data_reg &= ~mask; - writel(pio_data_reg, ALTERA_PIO_DATA); - writel(pio_dir_reg |= mask, ALTERA_PIO_DIR); - return 0; -} - -int gpio_get_value(unsigned gpio) -{ - u32 mask = 1 << gpio; - if (pio_dir_reg & mask) - return (pio_data_reg & mask) ? 1 : 0; - else - return (readl(ALTERA_PIO_DATA) & mask) ? 1 : 0; -} - -void gpio_set_value(unsigned gpio, int value) -{ - u32 mask = 1 << gpio; - if (value) - pio_data_reg |= mask; - else - pio_data_reg &= ~mask; - writel(pio_data_reg, ALTERA_PIO_DATA); -} - -int gpio_is_valid(int number) -{ - return ((unsigned)number) < ALTERA_PIO_WIDTH; -} -#endif diff --git a/include/configs/nios2-generic.h b/include/configs/nios2-generic.h index 1395939..9ba35e8 100644 --- a/include/configs/nios2-generic.h +++ b/include/configs/nios2-generic.h @@ -63,6 +63,10 @@ /* * STATUS LED */ +#define CONFIG_ALTERA_PIO +#define CONFIG_SYS_ALTERA_PIO_NUM 1 +#define CONFIG_SYS_ALTERA_PIO_GPIO_NUM LED_PIO_WIDTH + #define CONFIG_STATUS_LED /* Enable status driver */ #define CONFIG_GPIO_LED /* Enable GPIO LED driver */ #define CONFIG_GPIO /* Enable GPIO driver */ -- 1.7.6 ^ permalink raw reply related [flat|nested] 10+ messages in thread
end of thread, other threads:[~2011-10-28 7:29 UTC | newest] Thread overview: 10+ messages (download: mbox.gz follow: Atom feed -- links below jump to the message on this page -- 2011-10-17 15:36 [U-Boot] [PATCH 0/2] Replace nios2-generic's gpio.c with dedicated driver Joachim Foerster 2011-10-17 15:36 ` [U-Boot] [PATCH 1/2] gpio: Add driver for Altera's PIO core Joachim Foerster 2011-10-21 7:21 ` Thomas Chou 2011-10-21 13:48 ` [U-Boot] [PATCH 0/2] Replace nios2-generic's gpio.c with dedicated driver Joachim Foerster 2011-10-21 13:48 ` [U-Boot] [PATCH 1/2 v2] gpio: Add driver for Altera's PIO core Joachim Foerster 2011-10-28 7:29 ` Thomas Chou 2011-10-21 13:48 ` [U-Boot] [PATCH 2/2 v2] board/nios2-generic: Use altera_pio driver and remove board specific driver Joachim Foerster 2011-10-28 7:29 ` Thomas Chou 2011-10-21 13:49 ` [U-Boot] [PATCH 1/2] gpio: Add driver for Altera's PIO core Joachim Foerster 2011-10-17 15:36 ` [U-Boot] [PATCH 2/2] board/nios2-generic: Use altera_pio driver and remove board specific driver Joachim Foerster
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