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authorlonkaars <loek@pipeframe.xyz>2024-05-14 20:56:43 +0200
committerlonkaars <loek@pipeframe.xyz>2024-05-14 20:56:43 +0200
commita8bab1509e795f367db2e374fe600ecacf66e26b (patch)
tree97ccd68f1142da7cd372830ba5cab08c25495b6a /driver/platform.c
parent44a5c2b2d47dde5215171966eeef0acdadcaded3 (diff)
add attribute (9.4)
Diffstat (limited to 'driver/platform.c')
-rw-r--r--driver/platform.c44
1 files changed, 29 insertions, 15 deletions
diff --git a/driver/platform.c b/driver/platform.c
index da84064..c41d47b 100644
--- a/driver/platform.c
+++ b/driver/platform.c
@@ -2,6 +2,11 @@
#include <linux/types.h>
#include <linux/of.h>
+#include <linux/of_address.h>
+
+// TODO: shouldn't these be used??
+// #include <linux/pinctrl/pinctrl.h>
+// #include <linux/gpio/driver.h>
#include <dt-bindings/gpio/gpio.h>
@@ -19,23 +24,23 @@ int lork_probe(struct platform_device* dev) {
printk("lork: configure pin %u w/ mode 0x%02x\n", pin, gpio_mode);
// find the multiplexer that controls pin
- size_t len = of_property_count_u32_elems(gpio1, "gpio-ranges");
- struct device_node* am33xx_pinmux = NULL;
- for (size_t i = 0; i < len; i += 4) {
- uint32_t phandle, pin_start, pin_offset, pin_size;
- of_property_read_u32_index(gpio1, "gpio-ranges", i+0, &phandle);
- of_property_read_u32_index(gpio1, "gpio-ranges", i+1, &pin_start);
- of_property_read_u32_index(gpio1, "gpio-ranges", i+2, &pin_offset);
- of_property_read_u32_index(gpio1, "gpio-ranges", i+3, &pin_size);
+ // size_t len = of_property_count_u32_elems(gpio1, "gpio-ranges");
+ // struct device_node* am33xx_pinmux = NULL;
+ // for (size_t i = 0; i < len; i += 4) {
+ // uint32_t phandle, pin_start, pin_offset, pin_size;
+ // of_property_read_u32_index(gpio1, "gpio-ranges", i+0, &phandle);
+ // of_property_read_u32_index(gpio1, "gpio-ranges", i+1, &pin_start);
+ // of_property_read_u32_index(gpio1, "gpio-ranges", i+2, &pin_offset);
+ // of_property_read_u32_index(gpio1, "gpio-ranges", i+3, &pin_size);
- // get phandle for multiplexer corresponding to configured pin number
- if (pin_start > pin || pin >= pin_start + pin_size) continue;
+ // // get phandle for multiplexer corresponding to configured pin number
+ // if (pin_start > pin || pin >= pin_start + pin_size) continue;
- am33xx_pinmux = of_find_node_by_phandle(phandle);
- printk("0x%02x, %u -> %u + %u\n", phandle, pin_start, pin_offset, pin_size);
- break;
- }
- if (am33xx_pinmux == NULL) return EINVAL;
+ // am33xx_pinmux = of_find_node_by_phandle(phandle);
+ // printk("0x%02x, %u -> %u + %u\n", phandle, pin_start, pin_offset, pin_size);
+ // break;
+ // }
+ // if (am33xx_pinmux == NULL) return EINVAL;
// TODO: ???
@@ -67,3 +72,12 @@ int lork_remove(struct platform_device* dev) {
return 0;
}
+unsigned int val = 0;
+ssize_t attr_show(struct device_driver* drv, char* buf) {
+ return sprintf(buf, "%u\n", val);
+}
+ssize_t attr_store(struct device_driver* drv, const char* buf, size_t count) {
+ sscanf(buf, "%u", &val);
+ return count;
+}
+