diff options
Diffstat (limited to 'include/fdtdec.h')
| -rw-r--r-- | include/fdtdec.h | 123 |
1 files changed, 46 insertions, 77 deletions
diff --git a/include/fdtdec.h b/include/fdtdec.h index 8c2bd21..231eed7 100644 --- a/include/fdtdec.h +++ b/include/fdtdec.h @@ -115,9 +115,6 @@ enum fdt_compat_id { COMPAT_NVIDIA_TEGRA20_USB, /* Tegra20 USB port */ COMPAT_NVIDIA_TEGRA30_USB, /* Tegra30 USB port */ COMPAT_NVIDIA_TEGRA114_USB, /* Tegra114 USB port */ - COMPAT_NVIDIA_TEGRA114_I2C, /* Tegra114 I2C w/single clock source */ - COMPAT_NVIDIA_TEGRA20_I2C, /* Tegra20 i2c */ - COMPAT_NVIDIA_TEGRA20_DVC, /* Tegra20 dvc (really just i2c) */ COMPAT_NVIDIA_TEGRA20_EMC, /* Tegra20 memory controller */ COMPAT_NVIDIA_TEGRA20_EMC_TABLE, /* Tegra20 memory timing table */ COMPAT_NVIDIA_TEGRA20_KBC, /* Tegra20 Keyboard */ @@ -127,9 +124,6 @@ enum fdt_compat_id { COMPAT_NVIDIA_TEGRA124_SDMMC, /* Tegra124 SDMMC controller */ COMPAT_NVIDIA_TEGRA30_SDMMC, /* Tegra30 SDMMC controller */ COMPAT_NVIDIA_TEGRA20_SDMMC, /* Tegra20 SDMMC controller */ - COMPAT_NVIDIA_TEGRA20_SFLASH, /* Tegra 2 SPI flash controller */ - COMPAT_NVIDIA_TEGRA20_SLINK, /* Tegra 2 SPI SLINK controller */ - COMPAT_NVIDIA_TEGRA114_SPI, /* Tegra 114 SPI controller */ COMPAT_NVIDIA_TEGRA124_PCIE, /* Tegra 124 PCIe controller */ COMPAT_NVIDIA_TEGRA30_PCIE, /* Tegra 30 PCIe controller */ COMPAT_NVIDIA_TEGRA20_PCIE, /* Tegra 20 PCIe controller */ @@ -140,7 +134,6 @@ enum fdt_compat_id { COMPAT_SAMSUNG_S3C2440_I2C, /* Exynos I2C Controller */ COMPAT_SAMSUNG_EXYNOS5_SOUND, /* Exynos Sound */ COMPAT_WOLFSON_WM8994_CODEC, /* Wolfson WM8994 Sound Codec */ - COMPAT_SAMSUNG_EXYNOS_SPI, /* Exynos SPI */ COMPAT_GOOGLE_CROS_EC, /* Google CROS_EC Protocol */ COMPAT_GOOGLE_CROS_EC_KEYB, /* Google CROS_EC Keyboard */ COMPAT_SAMSUNG_EXYNOS_EHCI, /* Exynos EHCI controller */ @@ -178,38 +171,58 @@ enum fdt_compat_id { COMPAT_COUNT, }; -/* GPIOs are numbered from 0 */ -enum { - FDT_GPIO_NONE = -1U, /* an invalid GPIO used to end our list */ - - FDT_GPIO_ACTIVE_LOW = 1 << 0, /* input is active low (else high) */ -}; - -/* This is the state of a GPIO pin as defined by the fdt */ -struct fdt_gpio_state { - const char *name; /* name of the fdt property defining this */ - uint gpio; /* GPIO number, or FDT_GPIO_NONE if none */ - u8 flags; /* FDT_GPIO_... flags */ +#define MAX_PHANDLE_ARGS 16 +struct fdtdec_phandle_args { + int node; + int args_count; + uint32_t args[MAX_PHANDLE_ARGS]; }; -/* This tells us whether a fdt_gpio_state record is valid or not */ -#define fdt_gpio_isvalid(x) ((x)->gpio != FDT_GPIO_NONE) - /** - * Read the GPIO taking into account the polarity of the pin. + * fdtdec_parse_phandle_with_args() - Find a node pointed by phandle in a list * - * @param gpio pointer to the decoded gpio - * @return value of the gpio if successful, < 0 if unsuccessful - */ -int fdtdec_get_gpio(struct fdt_gpio_state *gpio); - -/** - * Write the GPIO taking into account the polarity of the pin. + * This function is useful to parse lists of phandles and their arguments. + * + * Example: + * + * phandle1: node1 { + * #list-cells = <2>; + * } + * + * phandle2: node2 { + * #list-cells = <1>; + * } + * + * node3 { + * list = <&phandle1 1 2 &phandle2 3>; + * } + * + * To get a device_node of the `node2' node you may call this: + * fdtdec_parse_phandle_with_args(blob, node3, "list", "#list-cells", 0, 1, + * &args); + * + * (This function is a modified version of __of_parse_phandle_with_args() from + * Linux 3.18) + * + * @blob: Pointer to device tree + * @src_node: Offset of device tree node containing a list + * @list_name: property name that contains a list + * @cells_name: property name that specifies the phandles' arguments count, + * or NULL to use @cells_count + * @cells_count: Cell count to use if @cells_name is NULL + * @index: index of a phandle to parse out + * @out_args: optional pointer to output arguments structure (will be filled) + * @return 0 on success (with @out_args filled out if not NULL), -ENOENT if + * @list_name does not exist, a phandle was not found, @cells_name + * could not be found, the arguments were truncated or there were too + * many arguments. * - * @param gpio pointer to the decoded gpio - * @return 0 if successful */ -int fdtdec_set_gpio(struct fdt_gpio_state *gpio, int val); +int fdtdec_parse_phandle_with_args(const void *blob, int src_node, + const char *list_name, + const char *cells_name, + int cell_count, int index, + struct fdtdec_phandle_args *out_args); /** * Find the next numbered alias for a peripheral. This is used to enumerate @@ -592,50 +605,6 @@ const u32 *fdtdec_locate_array(const void *blob, int node, int fdtdec_get_bool(const void *blob, int node, const char *prop_name); /** - * Decode a single GPIOs from an FDT. - * - * If the property is not found, then the GPIO structure will still be - * initialised, with gpio set to FDT_GPIO_NONE. This makes it easy to - * provide optional GPIOs. - * - * @param blob FDT blob to use - * @param node Node to look at - * @param prop_name Node property name - * @param gpio gpio elements to fill from FDT - * @return 0 if ok, -FDT_ERR_NOTFOUND if the property is missing. - */ -int fdtdec_decode_gpio(const void *blob, int node, const char *prop_name, - struct fdt_gpio_state *gpio); - -/** - * Decode a list of GPIOs from an FDT. This creates a list of GPIOs with no - * terminating item. - * - * @param blob FDT blob to use - * @param node Node to look at - * @param prop_name Node property name - * @param gpio Array of gpio elements to fill from FDT. This will be - * untouched if either 0 or an error is returned - * @param max_count Maximum number of elements allowed - * @return number of GPIOs read if ok, -FDT_ERR_BADLAYOUT if max_count would - * be exceeded, or -FDT_ERR_NOTFOUND if the property is missing. - */ -int fdtdec_decode_gpios(const void *blob, int node, const char *prop_name, - struct fdt_gpio_state *gpio, int max_count); - -/** - * Set up a GPIO pin according to the provided gpio information. At present this - * just requests the GPIO. - * - * If the gpio is FDT_GPIO_NONE, no action is taken. This makes it easy to - * deal with optional GPIOs. - * - * @param gpio GPIO info to use for set up - * @return 0 if all ok or gpio was FDT_GPIO_NONE; -1 on error - */ -int fdtdec_setup_gpio(struct fdt_gpio_state *gpio); - -/** * Look in the FDT for a config item with the given name and return its value * as a 32-bit integer. The property must have at least 4 bytes of data. The * value of the first cell is returned. |