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leds: simatic-ipc-leds: Don't directly deref ioremap_resource() returned ptr

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Sparse (rightly) currently gives the following warning:

drivers/leds/simple/simatic-ipc-leds.c:155:40:
 sparse: sparse: incorrect type in assignment (different address spaces)
 expected void *static [toplevel] simatic_ipc_led_memory
 got void [noderef] __iomem *

Fix this by changing the type of simatic_ipc_led_memory to void __iomem *
and use readl()/writel() to access it.

Cc: Henning Schild <henning.schild@siemens.com>
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Tested-by: Gerd Haeussler <gerd.haeussler.ext@siemens.com>
Signed-off-by: Pavel Machek <pavel@ucw.cz>
This commit is contained in:
Hans de Goede 2022-01-17 12:21:09 +01:00 committed by Pavel Machek
parent a8f59497a4
commit 8b43ef06ff
1 changed files with 18 additions and 14 deletions
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32
drivers/leds/simple/simatic-ipc-leds.c
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@ -41,7 +41,7 @@ static struct simatic_ipc_led simatic_ipc_leds_io[] = {
/* the actual start will be discovered with PCI, 0 is a placeholder */
static struct resource simatic_ipc_led_mem_res = DEFINE_RES_MEM_NAMED(0, SZ_4K, KBUILD_MODNAME);
static void *simatic_ipc_led_memory;
static void __iomem *simatic_ipc_led_memory;
static struct simatic_ipc_led simatic_ipc_leds_mem[] = {
{0x500 + 0x1A0, "red:" LED_FUNCTION_STATUS "-1"},
@ -92,21 +92,22 @@ static void simatic_ipc_led_set_mem(struct led_classdev *led_cd,
enum led_brightness brightness)
{
struct simatic_ipc_led *led = cdev_to_led(led_cd);
void __iomem *reg = simatic_ipc_led_memory + led->value;
u32 val;
u32 *p;
p = simatic_ipc_led_memory + led->value;
*p = (*p & ~1) | (brightness == LED_OFF);
val = readl(reg);
val = (val & ~1) | (brightness == LED_OFF);
writel(val, reg);
}
static enum led_brightness simatic_ipc_led_get_mem(struct led_classdev *led_cd)
{
struct simatic_ipc_led *led = cdev_to_led(led_cd);
void __iomem *reg = simatic_ipc_led_memory + led->value;
u32 val;
u32 *p;
p = simatic_ipc_led_memory + led->value;
return (*p & 1) ? LED_OFF : led_cd->max_brightness;
val = readl(reg);
return (val & 1) ? LED_OFF : led_cd->max_brightness;
}
static int simatic_ipc_leds_probe(struct platform_device *pdev)
@ -116,8 +117,9 @@ static int simatic_ipc_leds_probe(struct platform_device *pdev)
struct simatic_ipc_led *ipcled;
struct led_classdev *cdev;
struct resource *res;
void __iomem *reg;
int err, type;
u32 *p;
u32 val;
switch (plat->devmode) {
case SIMATIC_IPC_DEVICE_227D:
@ -157,11 +159,13 @@ static int simatic_ipc_leds_probe(struct platform_device *pdev)
return PTR_ERR(simatic_ipc_led_memory);
/* initialize power/watchdog LED */
p = simatic_ipc_led_memory + 0x500 + 0x1D8; /* PM_WDT_OUT */
*p = (*p & ~1);
p = simatic_ipc_led_memory + 0x500 + 0x1C0; /* PM_BIOS_BOOT_N */
*p = (*p | 1);
reg = simatic_ipc_led_memory + 0x500 + 0x1D8; /* PM_WDT_OUT */
val = readl(reg);
writel(val & ~1, reg);
reg = simatic_ipc_led_memory + 0x500 + 0x1C0; /* PM_BIOS_BOOT_N */
val = readl(reg);
writel(val | 1, reg);
break;
default:
return -ENODEV;