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Message-Id: <20230725143023.86325-7-andriy.shevchenko@linux.intel.com>
Date: Tue, 25 Jul 2023 17:30:20 +0300
From: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To: Jarkko Nikula <jarkko.nikula@...ux.intel.com>,
Mario Limonciello <mario.limonciello@....com>,
Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
Wolfram Sang <wsa@...nel.org>, linux-i2c@...r.kernel.org,
linux-kernel@...r.kernel.org
Cc: Mika Westerberg <mika.westerberg@...ux.intel.com>,
Jan Dabros <jsd@...ihalf.com>,
Andi Shyti <andi.shyti@...nel.org>
Subject: [PATCH v1 6/9] i2c: designware: Consolidate firmware parsing and configure code
We have two same code flows in the PCI and plaform drivers. Moreover,
the flow requires the common code to export a few functions. Instead,
consolidate that flow under new function called
i2c_dw_fw_parse_and_configure() and drop unneeded exports.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
---
drivers/i2c/busses/i2c-designware-common.c | 70 +++++++++++++++++++--
drivers/i2c/busses/i2c-designware-core.h | 9 +--
drivers/i2c/busses/i2c-designware-pcidrv.c | 10 +--
drivers/i2c/busses/i2c-designware-platdrv.c | 48 +-------------
4 files changed, 68 insertions(+), 69 deletions(-)
diff --git a/drivers/i2c/busses/i2c-designware-common.c b/drivers/i2c/busses/i2c-designware-common.c
index 222b530c0441..443426474cfc 100644
--- a/drivers/i2c/busses/i2c-designware-common.c
+++ b/drivers/i2c/busses/i2c-designware-common.c
@@ -20,6 +20,7 @@
#include <linux/io.h>
#include <linux/kernel.h>
#include <linux/module.h>
+#include <linux/of.h>
#include <linux/pm_runtime.h>
#include <linux/regmap.h>
#include <linux/swab.h>
@@ -188,7 +189,7 @@ static const u32 supported_speeds[] = {
I2C_MAX_STANDARD_MODE_FREQ,
};
-int i2c_dw_validate_speed(struct dw_i2c_dev *dev)
+static int i2c_dw_validate_speed(struct dw_i2c_dev *dev)
{
struct i2c_timings *t = &dev->timings;
unsigned int i;
@@ -208,7 +209,49 @@ int i2c_dw_validate_speed(struct dw_i2c_dev *dev)
return -EINVAL;
}
-EXPORT_SYMBOL_GPL(i2c_dw_validate_speed);
+
+#ifdef CONFIG_OF
+
+#include <linux/platform_device.h>
+
+#define MSCC_ICPU_CFG_TWI_DELAY 0x0
+#define MSCC_ICPU_CFG_TWI_DELAY_ENABLE BIT(0)
+#define MSCC_ICPU_CFG_TWI_SPIKE_FILTER 0x4
+
+static int mscc_twi_set_sda_hold_time(struct dw_i2c_dev *dev)
+{
+ writel((dev->sda_hold_time << 1) | MSCC_ICPU_CFG_TWI_DELAY_ENABLE,
+ dev->ext + MSCC_ICPU_CFG_TWI_DELAY);
+
+ return 0;
+}
+
+static void i2c_dw_of_do_configure(struct dw_i2c_dev *dev, struct device *device)
+{
+ struct platform_device *pdev = dev_is_platform(device) ? to_platform_device(device) : NULL;
+
+ switch (dev->flags & MODEL_MASK) {
+ case MODEL_MSCC_OCELOT:
+ dev->ext = devm_platform_ioremap_resource(pdev, 1);
+ if (!IS_ERR(dev->ext))
+ dev->set_sda_hold_time = mscc_twi_set_sda_hold_time;
+ break;
+ default:
+ break;
+ }
+}
+
+static void i2c_dw_of_configure(struct dw_i2c_dev *dev)
+{
+ if (dev_of_node(dev->dev))
+ i2c_dw_of_do_configure(dev, dev->dev);
+}
+
+#else /* CONFIG_OF */
+
+static inline void i2c_dw_of_configure(struct dw_i2c_dev *dev) { }
+
+#endif /* CONFIG_OF */
#ifdef CONFIG_ACPI
@@ -286,12 +329,11 @@ static void i2c_dw_acpi_do_configure(struct dw_i2c_dev *dev, struct device *devi
}
}
-void i2c_dw_acpi_configure(struct dw_i2c_dev *dev)
+static void i2c_dw_acpi_configure(struct dw_i2c_dev *dev)
{
if (has_acpi_companion(dev->dev))
i2c_dw_acpi_do_configure(dev, dev->dev);
}
-EXPORT_SYMBOL_GPL(i2c_dw_acpi_configure);
static u32 i2c_dw_acpi_round_bus_speed(struct device *device)
{
@@ -313,11 +355,13 @@ static u32 i2c_dw_acpi_round_bus_speed(struct device *device)
#else /* CONFIG_ACPI */
+static inline void i2c_dw_acpi_configure(struct dw_i2c_dev *dev) { }
+
static inline u32 i2c_dw_acpi_round_bus_speed(struct device *device) { return 0; }
#endif /* CONFIG_ACPI */
-void i2c_dw_adjust_bus_speed(struct dw_i2c_dev *dev)
+static void i2c_dw_adjust_bus_speed(struct dw_i2c_dev *dev)
{
u32 acpi_speed = i2c_dw_acpi_round_bus_speed(dev->dev);
struct i2c_timings *t = &dev->timings;
@@ -333,7 +377,21 @@ void i2c_dw_adjust_bus_speed(struct dw_i2c_dev *dev)
else
t->bus_freq_hz = I2C_MAX_FAST_MODE_FREQ;
}
-EXPORT_SYMBOL_GPL(i2c_dw_adjust_bus_speed);
+
+int i2c_dw_fw_parse_and_configure(struct dw_i2c_dev *dev)
+{
+ struct i2c_timings *t = &dev->timings;
+
+ i2c_parse_fw_timings(dev->dev, t, false);
+
+ i2c_dw_adjust_bus_speed(dev);
+
+ i2c_dw_of_configure(dev);
+ i2c_dw_acpi_configure(dev);
+
+ return i2c_dw_validate_speed(dev);
+}
+EXPORT_SYMBOL_GPL(i2c_dw_fw_parse_and_configure);
u32 i2c_dw_scl_hcnt(u32 ic_clk, u32 tSYMBOL, u32 tf, int cond, int offset)
{
diff --git a/drivers/i2c/busses/i2c-designware-core.h b/drivers/i2c/busses/i2c-designware-core.h
index f0c683ad860f..8547590fc91b 100644
--- a/drivers/i2c/busses/i2c-designware-core.h
+++ b/drivers/i2c/busses/i2c-designware-core.h
@@ -392,11 +392,4 @@ int i2c_dw_baytrail_probe_lock_support(struct dw_i2c_dev *dev);
int i2c_dw_amdpsp_probe_lock_support(struct dw_i2c_dev *dev);
#endif
-int i2c_dw_validate_speed(struct dw_i2c_dev *dev);
-void i2c_dw_adjust_bus_speed(struct dw_i2c_dev *dev);
-
-#if IS_ENABLED(CONFIG_ACPI)
-void i2c_dw_acpi_configure(struct dw_i2c_dev *dev);
-#else
-static inline void i2c_dw_acpi_configure(struct dw_i2c_dev *dev) { }
-#endif
+int i2c_dw_fw_parse_and_configure(struct dw_i2c_dev *dev);
diff --git a/drivers/i2c/busses/i2c-designware-pcidrv.c b/drivers/i2c/busses/i2c-designware-pcidrv.c
index a42a47e0032d..28a60fdb9ca2 100644
--- a/drivers/i2c/busses/i2c-designware-pcidrv.c
+++ b/drivers/i2c/busses/i2c-designware-pcidrv.c
@@ -252,7 +252,6 @@ static int i2c_dw_pci_probe(struct pci_dev *pdev,
int r;
struct dw_pci_controller *controller;
struct dw_scl_sda_cfg *cfg;
- struct i2c_timings *t;
if (id->driver_data >= ARRAY_SIZE(dw_pci_controllers))
return dev_err_probe(&pdev->dev, -EINVAL,
@@ -287,9 +286,6 @@ static int i2c_dw_pci_probe(struct pci_dev *pdev,
dev->irq = pci_irq_vector(pdev, 0);
dev->flags |= controller->flags;
- t = &dev->timings;
- i2c_parse_fw_timings(&pdev->dev, t, false);
-
pci_set_drvdata(pdev, dev);
if (controller->setup) {
@@ -300,11 +296,7 @@ static int i2c_dw_pci_probe(struct pci_dev *pdev,
}
}
- i2c_dw_adjust_bus_speed(dev);
-
- i2c_dw_acpi_configure(dev);
-
- r = i2c_dw_validate_speed(dev);
+ r = i2c_dw_fw_parse_and_configure(dev);
if (r) {
pci_free_irq_vectors(pdev);
return r;
diff --git a/drivers/i2c/busses/i2c-designware-platdrv.c b/drivers/i2c/busses/i2c-designware-platdrv.c
index d2ffd041c0c7..c73cba7db65f 100644
--- a/drivers/i2c/busses/i2c-designware-platdrv.c
+++ b/drivers/i2c/busses/i2c-designware-platdrv.c
@@ -21,7 +21,6 @@
#include <linux/kernel.h>
#include <linux/mfd/syscon.h>
#include <linux/module.h>
-#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/pm.h>
#include <linux/pm_runtime.h>
@@ -97,46 +96,11 @@ static int bt1_i2c_request_regs(struct dw_i2c_dev *dev)
dev->map = devm_regmap_init(dev->dev, NULL, dev, &bt1_i2c_cfg);
return PTR_ERR_OR_ZERO(dev->map);
}
-
-#define MSCC_ICPU_CFG_TWI_DELAY 0x0
-#define MSCC_ICPU_CFG_TWI_DELAY_ENABLE BIT(0)
-#define MSCC_ICPU_CFG_TWI_SPIKE_FILTER 0x4
-
-static int mscc_twi_set_sda_hold_time(struct dw_i2c_dev *dev)
-{
- writel((dev->sda_hold_time << 1) | MSCC_ICPU_CFG_TWI_DELAY_ENABLE,
- dev->ext + MSCC_ICPU_CFG_TWI_DELAY);
-
- return 0;
-}
-
-static void i2c_dw_of_do_configure(struct dw_i2c_dev *dev, struct device *device)
-{
- struct platform_device *pdev = to_platform_device(device);
-
- switch (dev->flags & MODEL_MASK) {
- case MODEL_MSCC_OCELOT:
- dev->ext = devm_platform_ioremap_resource(pdev, 1);
- if (!IS_ERR(dev->ext))
- dev->set_sda_hold_time = mscc_twi_set_sda_hold_time;
- break;
- default:
- break;
- }
-}
-
-static void i2c_dw_of_configure(struct dw_i2c_dev *dev)
-{
- if (dev_of_node(dev->dev))
- i2c_dw_of_do_configure(dev, dev->dev);
-}
#else
static int bt1_i2c_request_regs(struct dw_i2c_dev *dev)
{
return -ENODEV;
}
-
-static inline void i2c_dw_of_configure(struct dw_i2c_dev *dev) { }
#endif
static int txgbe_i2c_request_regs(struct dw_i2c_dev *dev)
@@ -248,7 +212,6 @@ static int dw_i2c_plat_probe(struct platform_device *pdev)
{
struct i2c_adapter *adap;
struct dw_i2c_dev *dev;
- struct i2c_timings *t;
int irq, ret;
irq = platform_get_irq(pdev, 0);
@@ -277,15 +240,7 @@ static int dw_i2c_plat_probe(struct platform_device *pdev)
reset_control_deassert(dev->rst);
- t = &dev->timings;
- i2c_parse_fw_timings(&pdev->dev, t, false);
-
- i2c_dw_adjust_bus_speed(dev);
-
- i2c_dw_of_configure(dev);
- i2c_dw_acpi_configure(dev);
-
- ret = i2c_dw_validate_speed(dev);
+ ret = i2c_dw_fw_parse_and_configure(dev);
if (ret)
goto exit_reset;
@@ -313,6 +268,7 @@ static int dw_i2c_plat_probe(struct platform_device *pdev)
goto exit_reset;
if (dev->clk) {
+ struct i2c_timings *t = &dev->timings;
u64 clk_khz;
dev->get_clk_rate_khz = i2c_dw_get_clk_rate_khz;
--
2.40.0.1.gaa8946217a0b
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