android/android_kernel_samsung_sm8650-modules
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disp: msm: add helper to retrieve gpio address mappings

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Add helper in util to retrieve IO address mappings for
a given global gpio pin. This will be used by the Trusted
UI framework to secure gpio pins.

Change-Id: If8ad069d724394f0772c9cf7371484a7cdc5bc78
Signed-off-by: Jeykumar Sankaran <jsanka@codeaurora.org>
This commit is contained in:
Jeykumar Sankaran 2021-04-27 16:26:14 -07:00
parent 1b9345b3af
commit ba57fd387c
2 changed files with 36 additions and 0 deletions
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1
include/linux/sde_io_util.h
View File

@ -107,6 +107,7 @@ int msm_dss_get_io_mem(struct platform_device *pdev,
void msm_dss_clean_io_mem(struct list_head *mem_list);
int msm_dss_get_pmic_io_mem(struct platform_device *pdev,
struct list_head *mem_list);
int msm_dss_get_gpio_io_mem(const int gpio_pin, struct list_head *mem_list);
int msm_dss_get_io_irq(struct platform_device *pdev,
struct list_head *irq_list, u32 label);
void msm_dss_clean_io_irq(struct list_head *irq_list);

35
msm/sde_io_util.c
View File

@ -8,6 +8,7 @@
#include <linux/io.h>
#include <linux/regulator/consumer.h>
#include <linux/soc/qcom/spmi-pmic-arb.h>
#include <linux/pinctrl/qcom-pinctrl.h>
#include <linux/delay.h>
#include <linux/sde_io_util.h>
#include <linux/sde_vm_event.h>
@ -133,6 +134,40 @@ void msm_dss_iounmap(struct dss_io_data *io_data)
} /* msm_dss_iounmap */
EXPORT_SYMBOL(msm_dss_iounmap);
int msm_dss_get_gpio_io_mem(const int gpio_pin, struct list_head *mem_list)
{
struct msm_io_mem_entry *io_mem;
struct resource res;
bool gpio_pin_status = false;
int rc = 0;
if (!gpio_is_valid(gpio_pin))
return -EINVAL;
io_mem = kzalloc(sizeof(struct msm_io_mem_entry), GFP_KERNEL);
if (!io_mem)
return -ENOMEM;
gpio_pin_status = msm_gpio_get_pin_address(gpio_pin, &res);
if (!gpio_pin_status) {
rc = -ENODEV;
goto parse_fail;
}
io_mem->base = res.start;
io_mem->size = resource_size(&res);
list_add(&io_mem->list, mem_list);
return 0;
parse_fail:
kfree(io_mem);
return rc;
}
EXPORT_SYMBOL(msm_dss_get_gpio_io_mem);
int msm_dss_get_pmic_io_mem(struct platform_device *pdev,
struct list_head *mem_list)
{