Unverified Commit d70f60ad authored by Andy Shevchenko's avatar Andy Shevchenko Committed by Andi Shyti
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i2c: designware: Remove not-going-to-be-supported code for Baikal SoC 

As noticed in the discussion [1] the Baikal SoC and platforms
are not going to be finalized, hence remove stale code.

Link: https://lore.kernel.org/lkml/22b92ddf-6321-41b5-8073-f9c7064d3432@infradead.org/

 [1]
Signed-off-by: default avatarAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: default avatarMika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: default avatarAndi Shyti <andi.shyti@kernel.org>
Link: https://lore.kernel.org/r/20260114081954.252160-2-andriy.shevchenko@linux.intel.com
parent 7b5073f9

drivers/i2c/busses/Kconfig

+0 −1
Original line number Diff line number Diff line
@@ -579,7 +579,6 @@ if I2C_DESIGNWARE_CORE 
config I2C_DESIGNWARE_PLATFORM

	tristate "Synopsys DesignWare Platform driver"

	depends on (ACPI && COMMON_CLK) || !ACPI

	select MFD_SYSCON if MIPS_BAIKAL_T1

	default I2C_DESIGNWARE_CORE

	help

	  If you say yes to this option, support will be included for the

drivers/i2c/busses/i2c-designware-core.h

+0 −1
Original line number Diff line number Diff line
@@ -314,7 +314,6 @@ struct dw_i2c_dev { 
#define ACCESS_POLLING				BIT(3)



#define MODEL_MSCC_OCELOT			BIT(8)

#define MODEL_BAIKAL_BT1			BIT(9)

#define MODEL_AMD_NAVI_GPU			BIT(10)

#define MODEL_WANGXUN_SP			BIT(11)

#define MODEL_MASK				GENMASK(11, 8)

drivers/i2c/busses/i2c-designware-platdrv.c

+0 −68
Original line number Diff line number Diff line
@@ -37,70 +37,6 @@ static u32 i2c_dw_get_clk_rate_khz(struct dw_i2c_dev *dev) 
	return clk_get_rate(dev->clk) / HZ_PER_KHZ;

}



#ifdef CONFIG_OF

#define BT1_I2C_CTL			0x100

#define BT1_I2C_CTL_ADDR_MASK		GENMASK(7, 0)

#define BT1_I2C_CTL_WR			BIT(8)

#define BT1_I2C_CTL_GO			BIT(31)

#define BT1_I2C_DI			0x104

#define BT1_I2C_DO			0x108



static int bt1_i2c_read(void *context, unsigned int reg, unsigned int *val)

{

	struct dw_i2c_dev *dev = context;

	int ret;



	/*

	 * Note these methods shouldn't ever fail because the system controller

	 * registers are memory mapped. We check the return value just in case.

	 */

	ret = regmap_write(dev->sysmap, BT1_I2C_CTL,

			   BT1_I2C_CTL_GO | (reg & BT1_I2C_CTL_ADDR_MASK));

	if (ret)

		return ret;



	return regmap_read(dev->sysmap, BT1_I2C_DO, val);

}



static int bt1_i2c_write(void *context, unsigned int reg, unsigned int val)

{

	struct dw_i2c_dev *dev = context;

	int ret;



	ret = regmap_write(dev->sysmap, BT1_I2C_DI, val);

	if (ret)

		return ret;



	return regmap_write(dev->sysmap, BT1_I2C_CTL,

			    BT1_I2C_CTL_GO | BT1_I2C_CTL_WR | (reg & BT1_I2C_CTL_ADDR_MASK));

}



static const struct regmap_config bt1_i2c_cfg = {

	.reg_bits = 32,

	.val_bits = 32,

	.reg_stride = 4,

	.fast_io = true,

	.reg_read = bt1_i2c_read,

	.reg_write = bt1_i2c_write,

	.max_register = DW_IC_COMP_TYPE,

};



static int bt1_i2c_request_regs(struct dw_i2c_dev *dev)

{

	dev->sysmap = syscon_node_to_regmap(dev->dev->of_node->parent);

	if (IS_ERR(dev->sysmap))

		return PTR_ERR(dev->sysmap);



	dev->map = devm_regmap_init(dev->dev, NULL, dev, &bt1_i2c_cfg);

	return PTR_ERR_OR_ZERO(dev->map);

}

#else

static int bt1_i2c_request_regs(struct dw_i2c_dev *dev)

{

	return -ENODEV;

}

#endif



static int dw_i2c_get_parent_regmap(struct dw_i2c_dev *dev)

{

	dev->map = dev_get_regmap(dev->dev->parent, NULL);
@@ -127,9 +63,6 @@ static int dw_i2c_plat_request_regs(struct dw_i2c_dev *dev) 
		return dw_i2c_get_parent_regmap(dev);



	switch (dev->flags & MODEL_MASK) {

	case MODEL_BAIKAL_BT1:

		ret = bt1_i2c_request_regs(dev);

		break;

	case MODEL_WANGXUN_SP:

		ret = dw_i2c_get_parent_regmap(dev);

		break;
@@ -334,7 +267,6 @@ static void dw_i2c_plat_remove(struct platform_device *pdev) 
}



static const struct of_device_id dw_i2c_of_match[] = {

	{ .compatible = "baikal,bt1-sys-i2c", .data = (void *)MODEL_BAIKAL_BT1 },

	{ .compatible = "mscc,ocelot-i2c", .data = (void *)MODEL_MSCC_OCELOT },

	{ .compatible = "snps,designware-i2c" },

	{}