Commit e89cc14e authored by Wolfram Sang's avatar Wolfram Sang Committed by Alexandre Belloni
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i3c: dw: use parity8 helper instead of open coding it 



The kernel has now a generic helper for getting parity with easier to
understand semantics. Make use of it.

Signed-off-by: default avatarWolfram Sang <wsa+renesas@sang-engineering.com>
Link: https://lore.kernel.org/r/20250107090204.6593-4-wsa+renesas@sang-engineering.com


Signed-off-by: default avatarAlexandre Belloni <alexandre.belloni@bootlin.com>
parent 32a8d362

drivers/i3c/master/dw-i3c-master.c

+3 −11
Original line number Diff line number Diff line
@@ -251,14 +251,6 @@ struct dw_i3c_i2c_dev_data { 
	struct i3c_generic_ibi_pool *ibi_pool;

};



static u8 even_parity(u8 p)

{

	p ^= p >> 4;

	p &= 0xf;



	return (0x9669 >> p) & 1;

}



static bool dw_i3c_master_supports_ccc_cmd(struct i3c_master_controller *m,

					   const struct i3c_ccc_cmd *cmd)

{
@@ -848,7 +840,7 @@ static int dw_i3c_master_daa(struct i3c_master_controller *m) 
	struct dw_i3c_xfer *xfer;

	struct dw_i3c_cmd *cmd;

	u32 olddevs, newdevs;

	u8 p, last_addr = 0;

	u8 last_addr = 0;

	int ret, pos;



	ret = pm_runtime_resume_and_get(master->dev);
@@ -873,9 +865,9 @@ static int dw_i3c_master_daa(struct i3c_master_controller *m) 
		}



		master->devs[pos].addr = ret;

		p = even_parity(ret);

		last_addr = ret;

		ret |= (p << 7);



		ret |= parity8(ret) ? 0 : BIT(7);



		writel(DEV_ADDR_TABLE_DYNAMIC_ADDR(ret),

		       master->regs +