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authorLinus Torvalds <torvalds@linux-foundation.org>2022-01-12 21:56:08 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2022-01-12 21:56:08 +0300
commite3084ed48fd6b661fe434da0cb36d7d6706cf27f (patch)
tree4616b80d5f5056fb8c8a70136cd04138b421536d /lib
parent2ab9c9675fe892e7fe9fa8c0a6125e2b40d2889d (diff)
parent7442936633bd1906a2571116ae334b68c56c8a72 (diff)
downloadlinux-e3084ed48fd6b661fe434da0cb36d7d6706cf27f.tar.xz
Merge tag 'pinctrl-v5.17-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl
Pull pin control bulk updates from Linus Walleij: "Core changes: - New standard enumerator and corresponding device tree bindings for output impedance pin configuration. (Implemented and used in the Renesas rzg2l driver.) - Cleanup of Kconfig and Makefile to be somewhat orderly and alphabetic. New drivers: - Samsung Exynos 7885 pin controller. - Ocelot LAN966x pin controller. - Qualcomm SDX65 pin controller. - Qualcomm SM8450 pin controller. - Qualcomm PM8019, PM8226 and PM2250 pin controllers. - NXP/Freescale i.MXRT1050 pin controller. - Intel Thunder Bay pin controller. Enhancements: - Introduction of the string library helper function "kasprintf_strarray()" and subsequent use in Rockchip, ST and Armada pin control drivers, as well as the GPIO mockup driver. - The Ocelot pin controller has been extensively rewritten to use regmap and other modern kernel infrastructure. - The Microchip SGPIO driver has been converted to use regmap. - The SPEAr driver had been converted to use regmap. - Substantial cleanups and janitorial on the Apple pin control driver that was merged for v5.16. - Janitorial to remove of_node assignments in the GPIO portions that anyway get this handled in the GPIO core. - Minor cleanups and improvements in several pin controllers" * tag 'pinctrl-v5.17-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl: (98 commits) pinctrl: imx: fix assigning groups names dt-bindings: pinctrl: mt8195: add wrapping node of pin configurations pinctrl: bcm: ns: use generic groups & functions helpers pinctrl: imx: fix allocation result check pinctrl: samsung: Use platform_get_irq_optional() to get the interrupt pinctrl: Propagate firmware node from a parent device dt-bindings: pinctrl: qcom: Add SDX65 pinctrl bindings pinctrl: add one more "const" for generic function groups pinctrl: keembay: rework loops looking for groups names pinctrl: keembay: comment process of building functions a bit pinctrl: imx: prepare for making "group_names" in "function_desc" const ARM: dts: gpio-ranges property is now required pinctrl: aspeed: fix unmet dependencies on MFD_SYSCON for PINCTRL_ASPEED pinctrl: Get rid of duplicate of_node assignment in the drivers pinctrl-sunxi: don't call pinctrl_gpio_direction() pinctrl-bcm2835: don't call pinctrl_gpio_direction() pinctrl: bcm2835: Silence uninit warning pinctrl: Sort Kconfig and Makefile entries alphabetically pinctrl: Add Intel Thunder Bay pinctrl driver dt-bindings: pinctrl: Add bindings for Intel Thunderbay pinctrl driver ...
Diffstat (limited to 'lib')
-rw-r--r--lib/string_helpers.c64
1 files changed, 64 insertions, 0 deletions
diff --git a/lib/string_helpers.c b/lib/string_helpers.c
index d5d008f5b1d9..90f9f1b7afec 100644
--- a/lib/string_helpers.c
+++ b/lib/string_helpers.c
@@ -10,6 +10,7 @@
#include <linux/math64.h>
#include <linux/export.h>
#include <linux/ctype.h>
+#include <linux/device.h>
#include <linux/errno.h>
#include <linux/fs.h>
#include <linux/limits.h>
@@ -675,6 +676,39 @@ char *kstrdup_quotable_file(struct file *file, gfp_t gfp)
EXPORT_SYMBOL_GPL(kstrdup_quotable_file);
/**
+ * kasprintf_strarray - allocate and fill array of sequential strings
+ * @gfp: flags for the slab allocator
+ * @prefix: prefix to be used
+ * @n: amount of lines to be allocated and filled
+ *
+ * Allocates and fills @n strings using pattern "%s-%zu", where prefix
+ * is provided by caller. The caller is responsible to free them with
+ * kfree_strarray() after use.
+ *
+ * Returns array of strings or NULL when memory can't be allocated.
+ */
+char **kasprintf_strarray(gfp_t gfp, const char *prefix, size_t n)
+{
+ char **names;
+ size_t i;
+
+ names = kcalloc(n + 1, sizeof(char *), gfp);
+ if (!names)
+ return NULL;
+
+ for (i = 0; i < n; i++) {
+ names[i] = kasprintf(gfp, "%s-%zu", prefix, i);
+ if (!names[i]) {
+ kfree_strarray(names, i);
+ return NULL;
+ }
+ }
+
+ return names;
+}
+EXPORT_SYMBOL_GPL(kasprintf_strarray);
+
+/**
* kfree_strarray - free a number of dynamically allocated strings contained
* in an array and the array itself
*
@@ -697,6 +731,36 @@ void kfree_strarray(char **array, size_t n)
}
EXPORT_SYMBOL_GPL(kfree_strarray);
+struct strarray {
+ char **array;
+ size_t n;
+};
+
+static void devm_kfree_strarray(struct device *dev, void *res)
+{
+ struct strarray *array = res;
+
+ kfree_strarray(array->array, array->n);
+}
+
+char **devm_kasprintf_strarray(struct device *dev, const char *prefix, size_t n)
+{
+ struct strarray *ptr;
+
+ ptr = devres_alloc(devm_kfree_strarray, sizeof(*ptr), GFP_KERNEL);
+ if (!ptr)
+ return ERR_PTR(-ENOMEM);
+
+ ptr->array = kasprintf_strarray(GFP_KERNEL, prefix, n);
+ if (!ptr->array) {
+ devres_free(ptr);
+ return ERR_PTR(-ENOMEM);
+ }
+
+ return ptr->array;
+}
+EXPORT_SYMBOL_GPL(devm_kasprintf_strarray);
+
/**
* strscpy_pad() - Copy a C-string into a sized buffer
* @dest: Where to copy the string to