[PATCH v2 5/7] mfd: pm8921: Use ssbi regmap

Stephen Boyd
2013-12-23T20:47:10Z

Use a regmap so that the pm8xxx read/write APIs can be removed
once all consumer drivers are converted.

Cc: Mark Brown <broonie@kernel.org>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
---
drivers/mfd/Kconfig | 1 +
drivers/mfd/pm8921-core.c | 72 +++++++++++++++++++++++++++--------------------
2 files changed, 42 insertions(+), 31 deletions(-)

diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index 35007ed..e4a3ae2 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -455,6 +455,7 @@ config MFD_PM8921_CORE
depends on (ARCH_MSM || HEXAGON)
select MFD_CORE
select MFD_PM8XXX
+ select REGMAP
help
If you say yes to this option, support will be included for the
built-in PM8921 PMIC chip.
diff --git a/drivers/mfd/pm8921-core.c b/drivers/mfd/pm8921-core.c
index 5d1d509..d13cb6e 100644
--- a/drivers/mfd/pm8921-core.c
+++ b/drivers/mfd/pm8921-core.c
@@ -23,6 +23,7 @@
#include <linux/slab.h>
#include <linux/err.h>
#include <linux/ssbi.h>
+#include <linux/regmap.h>
#include <linux/of_platform.h>
#include <linux/mfd/core.h>
#include <linux/mfd/pm8xxx/core.h>
@@ -55,6 +56,7 @@

struct pm_irq_chip {
struct device *dev;
+ struct regmap *regmap;
spinlock_t pm_irq_lock;
struct irq_domain *domain;
unsigned int num_irqs;
@@ -68,29 +70,19 @@ struct pm8921 {
struct pm_irq_chip *irq_chip;
};

-static int pm8xxx_read_root_irq(const struct pm_irq_chip *chip, u8 *rp)
-{
- return pm8xxx_readb(chip->dev, SSBI_REG_ADDR_IRQ_ROOT, rp);
-}
-
-static int pm8xxx_read_master_irq(const struct pm_irq_chip *chip, u8 m, u8 *bp)
-{
- return pm8xxx_readb(chip->dev,
- SSBI_REG_ADDR_IRQ_M_STATUS1 + m, bp);
-}
-
-static int pm8xxx_read_block_irq(struct pm_irq_chip *chip, u8 bp, u8 *ip)
+static int pm8xxx_read_block_irq(struct pm_irq_chip *chip, unsigned int bp,
+ unsigned int *ip)
{
int rc;

spin_lock(&chip->pm_irq_lock);
- rc = pm8xxx_writeb(chip->dev, SSBI_REG_ADDR_IRQ_BLK_SEL, bp);
+ rc = regmap_write(chip->regmap, SSBI_REG_ADDR_IRQ_BLK_SEL, bp);
if (rc) {
pr_err("Failed Selecting Block %d rc=%d\n", bp, rc);
goto bail;
}

- rc = pm8xxx_readb(chip->dev, SSBI_REG_ADDR_IRQ_IT_STATUS, ip);
+ rc = regmap_read(chip->regmap, SSBI_REG_ADDR_IRQ_IT_STATUS, ip);
if (rc)
pr_err("Failed Reading Status rc=%d\n", rc);
bail:
@@ -98,19 +90,20 @@ bail:
return rc;
}

-static int pm8xxx_config_irq(struct pm_irq_chip *chip, u8 bp, u8 cp)
+static int
+pm8xxx_config_irq(struct pm_irq_chip *chip, unsigned int bp, unsigned int cp)
{
int rc;

spin_lock(&chip->pm_irq_lock);
- rc = pm8xxx_writeb(chip->dev, SSBI_REG_ADDR_IRQ_BLK_SEL, bp);
+ rc = regmap_write(chip->regmap, SSBI_REG_ADDR_IRQ_BLK_SEL, bp);
if (rc) {
pr_err("Failed Selecting Block %d rc=%d\n", bp, rc);
goto bail;
}

cp |= PM_IRQF_WRITE;
- rc = pm8xxx_writeb(chip->dev, SSBI_REG_ADDR_IRQ_CONFIG, cp);
+ rc = regmap_write(chip->regmap, SSBI_REG_ADDR_IRQ_CONFIG, cp);
if (rc)
pr_err("Failed Configuring IRQ rc=%d\n", rc);
bail:
@@ -121,7 +114,7 @@ bail:
static int pm8xxx_irq_block_handler(struct pm_irq_chip *chip, int block)
{
int pmirq, irq, i, ret = 0;
- u8 bits;
+ unsigned int bits;

ret = pm8xxx_read_block_irq(chip, block, &bits);
if (ret) {
@@ -146,10 +139,11 @@ static int pm8xxx_irq_block_handler(struct pm_irq_chip *chip, int block)

static int pm8xxx_irq_master_handler(struct pm_irq_chip *chip, int master)
{
- u8 blockbits;
+ unsigned int blockbits;
int block_number, i, ret = 0;

- ret = pm8xxx_read_master_irq(chip, master, &blockbits);
+ ret = regmap_read(chip->regmap, SSBI_REG_ADDR_IRQ_M_STATUS1 + master,
+ &blockbits);
if (ret) {
pr_err("Failed to read master %d ret=%d\n", master, ret);
return ret;
@@ -171,12 +165,12 @@ static void pm8xxx_irq_handler(unsigned int irq, struct irq_desc *desc)
{
struct pm_irq_chip *chip = irq_desc_get_handler_data(desc);
struct irq_chip *irq_chip = irq_desc_get_chip(desc);
- u8 root;
+ unsigned int root;
int i, ret, masters = 0;

chained_irq_enter(irq_chip, desc);

- ret = pm8xxx_read_root_irq(chip, &root);
+ ret = regmap_read(chip->regmap, SSBI_REG_ADDR_IRQ_ROOT, &root);
if (ret) {
pr_err("Can't read root status ret=%d\n", ret);
return;
@@ -281,7 +275,7 @@ static struct irq_chip pm8xxx_irq_chip = {
static int pm8xxx_get_irq_stat(struct pm_irq_chip *chip, int irq)
{
int pmirq, rc;
- u8 block, bits, bit;
+ unsigned int block, bits, bit;
unsigned long flags;
struct irq_data *irq_data = irq_get_irq_data(irq);

@@ -292,14 +286,14 @@ static int pm8xxx_get_irq_stat(struct pm_irq_chip *chip, int irq)

spin_lock_irqsave(&chip->pm_irq_lock, flags);

- rc = pm8xxx_writeb(chip->dev, SSBI_REG_ADDR_IRQ_BLK_SEL, block);
+ rc = regmap_write(chip->regmap, SSBI_REG_ADDR_IRQ_BLK_SEL, block);
if (rc) {
pr_err("Failed Selecting block irq=%d pmirq=%d blk=%d rc=%d\n",
irq, pmirq, block, rc);
goto bail_out;
}

- rc = pm8xxx_readb(chip->dev, SSBI_REG_ADDR_IRQ_RT_STATUS, &bits);
+ rc = regmap_read(chip->regmap, SSBI_REG_ADDR_IRQ_RT_STATUS, &bits);
if (rc) {
pr_err("Failed Configuring irq=%d pmirq=%d blk=%d rc=%d\n",
irq, pmirq, block, rc);
@@ -337,7 +331,8 @@ static const struct irq_domain_ops pm8xxx_irq_domain_ops = {
.map = pm8xxx_irq_domain_map,
};

-static int pm8xxx_irq_init(struct platform_device *pdev, unsigned int irq)
+static int pm8xxx_irq_init(struct platform_device *pdev, struct regmap *regmap,
+ unsigned int irq)
{
struct pm_irq_chip *chip;
unsigned int nirqs = 256;
@@ -347,7 +342,7 @@ static int pm8xxx_irq_init(struct platform_device *pdev, unsigned int irq)
if (!chip)
return -ENOMEM;

- chip->dev = &pdev->dev;
+ chip->regmap = regmap;
chip->num_irqs = nirqs;
chip->num_blocks = DIV_ROUND_UP(chip->num_irqs, 8);
chip->num_masters = DIV_ROUND_UP(chip->num_blocks, 8);
@@ -416,11 +411,21 @@ static struct pm8xxx_drvdata pm8921_drvdata = {
.pmic_read_irq_stat = pm8921_read_irq_stat,
};

+static const struct regmap_config ssbi_regmap_config = {
+ .reg_bits = 16,
+ .val_bits = 8,
+ .max_register = 0x3ff,
+ .fast_io = true,
+ .reg_read = ssbi_reg_read,
+ .reg_write = ssbi_reg_write
+};
+
static int pm8921_probe(struct platform_device *pdev)
{
struct pm8921 *pmic;
+ struct regmap *regmap;
int rc;
- u8 val;
+ unsigned int val;
unsigned int irq;
u32 rev;

@@ -435,8 +440,13 @@ static int pm8921_probe(struct platform_device *pdev)
return -ENOMEM;
}

+ regmap = devm_regmap_init(&pdev->dev, NULL, pdev->dev.parent,
+ &ssbi_regmap_config);
+ if (IS_ERR(regmap))
+ return PTR_ERR(regmap);
+
/* Read PMIC chip revision */
- rc = ssbi_read(pdev->dev.parent, REG_HWREV, &val, sizeof(val));
+ rc = regmap_read(regmap, REG_HWREV, &val);
if (rc) {
pr_err("Failed to read hw rev reg %d:rc=%d\n", REG_HWREV, rc);
return rc;
@@ -445,7 +455,7 @@ static int pm8921_probe(struct platform_device *pdev)
rev = val;

/* Read PMIC chip revision 2 */
- rc = ssbi_read(pdev->dev.parent, REG_HWREV_2, &val, sizeof(val));
+ rc = regmap_read(regmap, REG_HWREV_2, &val);
if (rc) {
pr_err("Failed to read hw rev 2 reg %d:rc=%d\n",
REG_HWREV_2, rc);
@@ -458,7 +468,7 @@ static int pm8921_probe(struct platform_device *pdev)
pm8921_drvdata.pm_chip_data = pmic;
platform_set_drvdata(pdev, &pm8921_drvdata);

- rc = pm8xxx_irq_init(pdev, irq);
+ rc = pm8xxx_irq_init(pdev, regmap, irq);
if (rc)
return rc;

--
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