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Subject[PATCH 22/44] staging: mfd: hi6421-spmi-pmic: cleanup the code
Date
There are several small cleanups that can be done in order to
make the code more prepared to be upstreamed.

Suggested-by: Jonathan Cameron <Jonathan.Cameron@Huawei.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
---
drivers/staging/hikey9xx/hi6421-spmi-pmic.c | 146 +++++++++-----------
include/linux/mfd/hi6421-spmi-pmic.h | 13 +-
2 files changed, 71 insertions(+), 88 deletions(-)

diff --git a/drivers/staging/hikey9xx/hi6421-spmi-pmic.c b/drivers/staging/hikey9xx/hi6421-spmi-pmic.c
index d8b84d64041e..76766e7b8bf9 100644
--- a/drivers/staging/hikey9xx/hi6421-spmi-pmic.c
+++ b/drivers/staging/hikey9xx/hi6421-spmi-pmic.c
@@ -17,26 +17,23 @@
*
*/

-#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/device.h>
-#include <linux/module.h>
#include <linux/err.h>
#include <linux/interrupt.h>
#include <linux/io.h>
+#include <linux/irq.h>
#include <linux/mfd/core.h>
-#include <linux/platform_device.h>
-#include <linux/of.h>
+#include <linux/mfd/hi6421-spmi-pmic.h>
+#include <linux/module.h>
#include <linux/of_address.h>
#include <linux/of_device.h>
#include <linux/of_gpio.h>
+#include <linux/of.h>
#include <linux/of_irq.h>
-#include <linux/mfd/hi6421-spmi-pmic.h>
-#include <linux/irq.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
#include <linux/spmi.h>
-#ifndef NO_IRQ
-#define NO_IRQ 0
-#endif

/* 8-bit register offset in PMIC */
#define HISI_MASK_STATE 0xff
@@ -46,12 +43,11 @@
#define HISI_IRQ_KEY_DOWN 7
#define HISI_IRQ_KEY_UP 6

-/*#define HISI_NR_IRQ 25*/
-#define HISI_MASK_FIELD 0xFF
+#define HISI_MASK_FIELD 0xFF
#define HISI_BITS 8

/*define the first group interrupt register number*/
-#define HISI_PMIC_FIRST_GROUP_INT_NUM 2
+#define HISI_PMIC_FIRST_GROUP_INT_NUM 2

static const struct mfd_cell hi6421v600_devs[] = {
{ .name = "hi6421v600-regulator", },
@@ -62,58 +58,60 @@ static const struct mfd_cell hi6421v600_devs[] = {
* Hisilicon SoC use hardware to map PMIC register into SoC mapping.
* At here, we are accessing SoC register with 32-bit.
*/
-u32 hi6421_spmi_pmic_read(struct hi6421_spmi_pmic *pmic, int reg)
+int hi6421_spmi_pmic_read(struct hi6421_spmi_pmic *pmic, int reg)
{
- u32 ret;
+ struct spmi_device *pdev;
u8 read_value = 0;
- struct spmi_device *pdev;
+ u32 ret;

pdev = to_spmi_device(pmic->dev);
if (!pdev) {
pr_err("%s: pdev get failed!\n", __func__);
- return 0;
+ return -ENODEV;
}

- ret = spmi_ext_register_readl(pdev, reg,
- (unsigned char *)&read_value, 1);
+ ret = spmi_ext_register_readl(pdev, reg, &read_value, 1);
if (ret) {
pr_err("%s: spmi_ext_register_readl failed!\n", __func__);
- return 0;
+ return ret;
}
- return (u32)read_value;
+ return read_value;
}
EXPORT_SYMBOL(hi6421_spmi_pmic_read);

-void hi6421_spmi_pmic_write(struct hi6421_spmi_pmic *pmic, int reg, u32 val)
+int hi6421_spmi_pmic_write(struct hi6421_spmi_pmic *pmic, int reg, u32 val)
{
- u32 ret;
struct spmi_device *pdev;
+ u32 ret;

pdev = to_spmi_device(pmic->dev);
if (!pdev) {
pr_err("%s: pdev get failed!\n", __func__);
- return;
+ return -ENODEV;
}

ret = spmi_ext_register_writel(pdev, reg, (unsigned char *)&val, 1);
- if (ret) {
+ if (ret)
pr_err("%s: spmi_ext_register_writel failed!\n", __func__);
- return;
- }
+
+ return ret;
}
EXPORT_SYMBOL(hi6421_spmi_pmic_write);

-void hi6421_spmi_pmic_rmw(struct hi6421_spmi_pmic *pmic, int reg,
+int hi6421_spmi_pmic_rmw(struct hi6421_spmi_pmic *pmic, int reg,
u32 mask, u32 bits)
{
+ unsigned long flags;
u32 data;
- unsigned long flags;
+ int ret;

spin_lock_irqsave(&pmic->lock, flags);
data = hi6421_spmi_pmic_read(pmic, reg) & ~mask;
data |= mask & bits;
- hi6421_spmi_pmic_write(pmic, reg, data);
+ ret = hi6421_spmi_pmic_write(pmic, reg, data);
spin_unlock_irqrestore(&pmic->lock, flags);
+
+ return ret;
}
EXPORT_SYMBOL(hi6421_spmi_pmic_rmw);

@@ -124,13 +122,12 @@ static irqreturn_t hi6421_spmi_irq_handler(int irq, void *data)
int i, offset;

for (i = 0; i < pmic->irqarray; i++) {
- pending = hi6421_spmi_pmic_read(pmic, (i + pmic->irq_addr.start_addr));
+ pending = hi6421_spmi_pmic_read(pmic, (i + pmic->irq_addr));
pending &= HISI_MASK_FIELD;
if (pending != 0)
pr_debug("pending[%d]=0x%lx\n\r", i, pending);

- hi6421_spmi_pmic_write(pmic, (i + pmic->irq_addr.start_addr),
- pending);
+ hi6421_spmi_pmic_write(pmic, (i + pmic->irq_addr), pending);

/* solve powerkey order */
if ((i == HISI_IRQ_KEY_NUM) && ((pending & HISI_IRQ_KEY_VALUE) == HISI_IRQ_KEY_VALUE)) {
@@ -155,7 +152,7 @@ static void hi6421_spmi_irq_mask(struct irq_data *d)
unsigned long flags;

offset = (irqd_to_hwirq(d) >> 3);
- offset += pmic->irq_mask_addr.start_addr;
+ offset += pmic->irq_mask_addr;

spin_lock_irqsave(&pmic->lock, flags);
data = hi6421_spmi_pmic_read(pmic, offset);
@@ -171,7 +168,7 @@ static void hi6421_spmi_irq_unmask(struct irq_data *d)
unsigned long flags;

offset = (irqd_to_hwirq(d) >> 3);
- offset += pmic->irq_mask_addr.start_addr;
+ offset += pmic->irq_mask_addr;

spin_lock_irqsave(&pmic->lock, flags);
data = hi6421_spmi_pmic_read(pmic, offset);
@@ -211,36 +208,32 @@ static int get_pmic_device_tree_data(struct device_node *np,
{
int ret = 0;

- /*get pmic irq num*/
- ret = of_property_read_u32_array(np, "irq-num",
- &pmic->irqnum, 1);
+ /* IRQ number */
+ ret = of_property_read_u32(np, "irq-num", &pmic->irqnum);
if (ret) {
pr_err("no irq-num property set\n");
ret = -ENODEV;
return ret;
}

- /*get pmic irq array number*/
- ret = of_property_read_u32_array(np, "irq-array",
- &pmic->irqarray, 1);
+ /* Size of IRQ array */
+ ret = of_property_read_u32(np, "irq-array", &pmic->irqarray);
if (ret) {
pr_err("no irq-array property set\n");
ret = -ENODEV;
return ret;
}

- /*SOC_PMIC_IRQ_MASK_0_ADDR*/
- ret = of_property_read_u32_array(np, "irq-mask-addr",
- (int *)&pmic->irq_mask_addr, 2);
+ /* SOC_PMIC_IRQ_MASK_0_ADDR */
+ ret = of_property_read_u32(np, "irq-mask-addr", &pmic->irq_mask_addr);
if (ret) {
pr_err("no irq-mask-addr property set\n");
ret = -ENODEV;
return ret;
}

- /*SOC_PMIC_IRQ0_ADDR*/
- ret = of_property_read_u32_array(np, "irq-addr",
- (int *)&pmic->irq_addr, 2);
+ /* SOC_PMIC_IRQ0_ADDR */
+ ret = of_property_read_u32(np, "irq-addr", &pmic->irq_addr);
if (ret) {
pr_err("no irq-addr property set\n");
ret = -ENODEV;
@@ -252,18 +245,18 @@ static int get_pmic_device_tree_data(struct device_node *np,

static void hi6421_spmi_pmic_irq_prc(struct hi6421_spmi_pmic *pmic)
{
- int i;
+ int i, pending;

- for (i = 0 ; i < pmic->irq_mask_addr.array; i++)
- hi6421_spmi_pmic_write(pmic, pmic->irq_mask_addr.start_addr + i,
+ for (i = 0 ; i < pmic->irqarray; i++)
+ hi6421_spmi_pmic_write(pmic, pmic->irq_mask_addr + i,
HISI_MASK_STATE);

- for (i = 0 ; i < pmic->irq_addr.array; i++) {
- unsigned int pending = hi6421_spmi_pmic_read(pmic, pmic->irq_addr.start_addr + i);
+ for (i = 0 ; i < pmic->irqarray; i++) {
+ pending = hi6421_spmi_pmic_read(pmic, pmic->irq_addr + i);

pr_debug("PMU IRQ address value:irq[0x%x] = 0x%x\n",
- pmic->irq_addr.start_addr + i, pending);
- hi6421_spmi_pmic_write(pmic, pmic->irq_addr.start_addr + i,
+ pmic->irq_addr + i, pending);
+ hi6421_spmi_pmic_write(pmic, pmic->irq_addr + i,
HISI_MASK_STATE);
}
}
@@ -272,36 +265,32 @@ static int hi6421_spmi_pmic_probe(struct spmi_device *pdev)
{
struct device *dev = &pdev->dev;
struct device_node *np = dev->of_node;
- struct hi6421_spmi_pmic *pmic = NULL;
- enum of_gpio_flags flags;
- int ret = 0;
- int i;
+ struct hi6421_spmi_pmic *pmic;
unsigned int virq;
+ int ret, i;

pmic = devm_kzalloc(dev, sizeof(*pmic), GFP_KERNEL);
if (!pmic)
return -ENOMEM;

- /*TODO: get pmic dts info*/
ret = get_pmic_device_tree_data(np, pmic);
if (ret) {
- dev_err(&pdev->dev, "Error reading hisi pmic dts\n");
+ dev_err(dev, "Error reading hisi pmic dts\n");
return ret;
}

- /* TODO: get and enable clk request */
spin_lock_init(&pmic->lock);

pmic->dev = dev;

- pmic->gpio = of_get_gpio_flags(np, 0, &flags);
+ pmic->gpio = of_get_gpio(np, 0);
if (pmic->gpio < 0)
return pmic->gpio;

if (!gpio_is_valid(pmic->gpio))
return -EINVAL;

- ret = gpio_request_one(pmic->gpio, GPIOF_IN, "pmic");
+ ret = devm_gpio_request_one(dev, pmic->gpio, GPIOF_IN, "pmic");
if (ret < 0) {
dev_err(dev, "failed to request gpio%d\n", pmic->gpio);
return ret;
@@ -309,7 +298,6 @@ static int hi6421_spmi_pmic_probe(struct spmi_device *pdev)

pmic->irq = gpio_to_irq(pmic->gpio);

- /* mask && clear IRQ status */
hi6421_spmi_pmic_irq_prc(pmic);

pmic->irqs = devm_kzalloc(dev, pmic->irqnum * sizeof(int), GFP_KERNEL);
@@ -321,27 +309,27 @@ static int hi6421_spmi_pmic_probe(struct spmi_device *pdev)
if (!pmic->domain) {
dev_err(dev, "failed irq domain add simple!\n");
ret = -ENODEV;
- goto irq_domain;
+ goto irq_malloc;
}

for (i = 0; i < pmic->irqnum; i++) {
virq = irq_create_mapping(pmic->domain, i);
- if (virq == NO_IRQ) {
- pr_debug("Failed mapping hwirq\n");
+ if (!virq) {
+ dev_err(dev, "Failed mapping hwirq\n");
ret = -ENOSPC;
- goto irq_create_mapping;
+ goto irq_malloc;
}
pmic->irqs[i] = virq;
- pr_info("[%s]. pmic->irqs[%d] = %d\n", __func__, i, pmic->irqs[i]);
+ dev_dbg(dev, "%s: pmic->irqs[%d] = %d\n",
+ __func__, i, pmic->irqs[i]);
}

ret = request_threaded_irq(pmic->irq, hi6421_spmi_irq_handler, NULL,
IRQF_TRIGGER_LOW | IRQF_SHARED | IRQF_NO_SUSPEND,
"pmic", pmic);
if (ret < 0) {
- dev_err(dev, "could not claim pmic %d\n", ret);
- ret = -ENODEV;
- goto request_theaded_irq;
+ dev_err(dev, "could not claim pmic IRQ: error %d\n", ret);
+ goto irq_malloc;
}

dev_set_drvdata(&pdev->dev, pmic);
@@ -355,18 +343,14 @@ static int hi6421_spmi_pmic_probe(struct spmi_device *pdev)
ret = devm_mfd_add_devices(&pdev->dev, PLATFORM_DEVID_NONE,
hi6421v600_devs, ARRAY_SIZE(hi6421v600_devs),
NULL, 0, NULL);
- if (ret) {
- dev_err(&pdev->dev, "Failed to add child devices: %d\n", ret);
- return ret;
- }
+ if (!ret)
+ return 0;

- return 0;
+ dev_err(dev, "Failed to add child devices: %d\n", ret);

-request_theaded_irq:
-irq_create_mapping:
-irq_domain:
irq_malloc:
- gpio_free(pmic->gpio);
+ free_irq(pmic->irq, pmic);
+
return ret;
}

@@ -375,8 +359,6 @@ static void hi6421_spmi_pmic_remove(struct spmi_device *pdev)
struct hi6421_spmi_pmic *pmic = dev_get_drvdata(&pdev->dev);

free_irq(pmic->irq, pmic);
- gpio_free(pmic->gpio);
- devm_kfree(&pdev->dev, pmic);
}

static const struct of_device_id pmic_spmi_id_table[] = {
diff --git a/include/linux/mfd/hi6421-spmi-pmic.h b/include/linux/mfd/hi6421-spmi-pmic.h
index aeff96c4a37e..ff3adfa7b3ec 100644
--- a/include/linux/mfd/hi6421-spmi-pmic.h
+++ b/include/linux/mfd/hi6421-spmi-pmic.h
@@ -36,16 +36,17 @@ struct hi6421_spmi_pmic {
int irq;
int gpio;
unsigned int *irqs;
+
int irqnum;
int irqarray;
-
- struct hi6421_spmi_irq_mask_info irq_mask_addr;
- struct hi6421_spmi_irq_info irq_addr;
+ int irq_mask_addr;
+ int irq_addr;
};

-u32 hi6421_spmi_pmic_read(struct hi6421_spmi_pmic *pmic, int reg);
-void hi6421_spmi_pmic_write(struct hi6421_spmi_pmic *pmic, int reg, u32 val);
-void hi6421_spmi_pmic_rmw(struct hi6421_spmi_pmic *pmic, int reg, u32 mask, u32 bits);
+int hi6421_spmi_pmic_read(struct hi6421_spmi_pmic *pmic, int reg);
+int hi6421_spmi_pmic_write(struct hi6421_spmi_pmic *pmic, int reg, u32 val);
+int hi6421_spmi_pmic_rmw(struct hi6421_spmi_pmic *pmic, int reg,
+ u32 mask, u32 bits);

enum hi6421_spmi_pmic_irq_list {
OTMP = 0,
--
2.26.2
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