Commit 311499ee authored by Ciprian Marian Costea's avatar Ciprian Marian Costea Committed by Andi Shyti
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i2c: imx: add support for S32G2/S32G3 SoCs 



Some S32G2/S32G3 SoC I2C particularities exist
such as different <clock divider, register value> pairs.
Those are addressed by adding specific S32G2 and S32G3
compatible strings.

Co-developed-by: default avatarIonut Vicovan <Ionut.Vicovan@nxp.com>
Signed-off-by: default avatarIonut Vicovan <Ionut.Vicovan@nxp.com>
Signed-off-by: default avatarCiprian Marian Costea <ciprianmarian.costea@oss.nxp.com>
Reviewed-by: default avatarFrank Li <Frank.Li@nxp.com>
Signed-off-by: default avatarAndi Shyti <andi.shyti@kernel.org>
parent f3ed4959

drivers/i2c/busses/Kconfig

+4 −3
Original line number Diff line number Diff line
@@ -733,11 +733,12 @@ config I2C_IMG 


config I2C_IMX

	tristate "IMX I2C interface"

	depends on ARCH_MXC || ARCH_LAYERSCAPE || COLDFIRE || COMPILE_TEST

	depends on ARCH_MXC || ARCH_LAYERSCAPE || ARCH_S32 || COLDFIRE \

		|| COMPILE_TEST

	select I2C_SLAVE

	help

	  Say Y here if you want to use the IIC bus controller on

	  the Freescale i.MX/MXC, Layerscape or ColdFire processors.

	  the Freescale i.MX/MXC/S32G, Layerscape or ColdFire processors.



	  This driver can also be built as a module. If so, the module

	  will be called i2c-imx.

drivers/i2c/busses/i2c-imx.c

+36 −1
Original line number Diff line number Diff line
@@ -17,7 +17,7 @@ 
 *	Copyright (C) 2008 Darius Augulis <darius.augulis at teltonika.lt>

 *

 *	Copyright 2013 Freescale Semiconductor, Inc.

 *	Copyright 2020 NXP

 *	Copyright 2020, 2024 NXP

 *

 */
@@ -84,6 +84,7 @@ 


#define IMX_I2C_REGSHIFT	2

#define VF610_I2C_REGSHIFT	0

#define S32G_I2C_REGSHIFT	0



/* Bits of IMX I2C registers */

#define I2SR_RXAK	0x01
@@ -165,9 +166,34 @@ static struct imx_i2c_clk_pair vf610_i2c_clk_div[] = { 
	{ 3840, 0x3F }, { 4096, 0x7B }, { 5120, 0x7D }, { 6144, 0x7E },

};



/* S32G2/S32G3 clock divider, register value pairs */

static struct imx_i2c_clk_pair s32g2_i2c_clk_div[] = {

	{ 34,    0x00 }, { 36,    0x01 }, { 38,    0x02 }, { 40,    0x03 },

	{ 42,    0x04 }, { 44,    0x05 }, { 46,    0x06 }, { 48,    0x09 },

	{ 52,    0x0A }, { 54,    0x07 }, { 56,    0x0B }, { 60,    0x0C },

	{ 64,    0x0D }, { 68,    0x40 }, { 72,    0x0E }, { 76,    0x42 },

	{ 80,    0x12 }, { 84,    0x0F }, { 88,    0x13 }, { 96,    0x14 },

	{ 104,   0x15 }, { 108,   0x47 }, { 112,   0x19 }, { 120,   0x16 },

	{ 128,   0x1A }, { 136,   0x80 }, { 144,   0x17 }, { 152,   0x82 },

	{ 160,   0x1C }, { 168,   0x84 }, { 176,   0x1D }, { 192,   0x21 },

	{ 208,   0x1E }, { 216,   0x87 }, { 224,   0x22 }, { 240,   0x56 },

	{ 256,   0x1F }, { 288,   0x24 }, { 320,   0x25 }, { 336,   0x8F },

	{ 352,   0x93 }, { 356,   0x5D }, { 358,   0x98 }, { 384,   0x26 },

	{ 416,   0x56 }, { 448,   0x2A }, { 480,   0x27 }, { 512,   0x2B },

	{ 576,   0x2C }, { 640,   0x2D }, { 704,   0x9D }, { 768,   0x2E },

	{ 832,   0x9D }, { 896,   0x32 }, { 960,   0x2F }, { 1024,  0x33 },

	{ 1152,  0x34 }, { 1280,  0x35 }, { 1536,  0x36 }, { 1792,  0x3A },

	{ 1920,  0x37 }, { 2048,  0x3B }, { 2304,  0x74 }, { 2560,  0x3D },

	{ 3072,  0x3E }, { 3584,  0x7A }, { 3840,  0x3F }, { 4096,  0x7B },

	{ 4608,  0x7C }, { 5120,  0x7D }, { 6144,  0x7E }, { 7168,  0xBA },

	{ 7680,  0x7F }, { 8192,  0xBB }, { 9216,  0xBC }, { 10240, 0xBD },

	{ 12288, 0xBE }, { 15360, 0xBF },

};



enum imx_i2c_type {

	IMX1_I2C,

	IMX21_I2C,

	S32G_I2C,

	VF610_I2C,

};
@@ -277,7 +303,15 @@ static struct imx_i2c_hwdata vf610_i2c_hwdata = { 
	.ndivs			= ARRAY_SIZE(vf610_i2c_clk_div),

	.i2sr_clr_opcode	= I2SR_CLR_OPCODE_W1C,

	.i2cr_ien_opcode	= I2CR_IEN_OPCODE_0,

};



static const struct imx_i2c_hwdata s32g2_i2c_hwdata = {

	.devtype		= S32G_I2C,

	.regshift		= S32G_I2C_REGSHIFT,

	.clk_div		= s32g2_i2c_clk_div,

	.ndivs			= ARRAY_SIZE(s32g2_i2c_clk_div),

	.i2sr_clr_opcode	= I2SR_CLR_OPCODE_W1C,

	.i2cr_ien_opcode	= I2CR_IEN_OPCODE_0,

};



static const struct platform_device_id imx_i2c_devtype[] = {
@@ -307,6 +341,7 @@ static const struct of_device_id i2c_imx_dt_ids[] = { 
	{ .compatible = "fsl,imx8mp-i2c", .data = &imx6_i2c_hwdata, },

	{ .compatible = "fsl,imx8mq-i2c", .data = &imx6_i2c_hwdata, },

	{ .compatible = "fsl,vf610-i2c", .data = &vf610_i2c_hwdata, },

	{ .compatible = "nxp,s32g2-i2c", .data = &s32g2_i2c_hwdata, },

	{ /* sentinel */ }

};

MODULE_DEVICE_TABLE(of, i2c_imx_dt_ids);