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i2c: pxa: Add definition of fast and high speed modes via the regs layout

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So far, the bit masks for the fast and high speed mode were statically
defined. Some IP blocks might use different bits for these modes.

This commit introduces new fields in order to enable the definition of
different bit masks for these features. If these fields are undefined,
ICR_FM and ICR_HS are selected to preserve backward compatibility with
other IPs.

Signed-off-by: Romain Perier <romain.perier@free-electrons.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
This commit is contained in:
Romain Perier 2016-12-01 12:04:37 +01:00 committed by Wolfram Sang
parent c270902803
commit 6c14bdacdb
1 changed files with 9 additions and 2 deletions
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11
drivers/i2c/busses/i2c-pxa.c
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@ -48,6 +48,8 @@ struct pxa_reg_layout {
u32 isar;
u32 ilcr;
u32 iwcr;
u32 fm;
u32 hs;
};
enum pxa_i2c_types {
@ -193,6 +195,8 @@ struct pxa_i2c {
unsigned char master_code;
unsigned long rate;
bool highmode_enter;
u32 fm_mask;
u32 hs_mask;
};
#define _IBMR(i2c) ((i2c)->reg_ibmr)
@ -503,8 +507,8 @@ static void i2c_pxa_reset(struct pxa_i2c *i2c)
writel(i2c->slave_addr, _ISAR(i2c));
/* set control register values */
writel(I2C_ICR_INIT | (i2c->fast_mode ? ICR_FM : 0), _ICR(i2c));
writel(readl(_ICR(i2c)) | (i2c->high_mode ? ICR_HS : 0), _ICR(i2c));
writel(I2C_ICR_INIT | (i2c->fast_mode ? i2c->fm_mask : 0), _ICR(i2c));
writel(readl(_ICR(i2c)) | (i2c->high_mode ? i2c->hs_mask : 0), _ICR(i2c));
#ifdef CONFIG_I2C_PXA_SLAVE
dev_info(&i2c->adap.dev, "Enabling slave mode\n");
@ -1234,6 +1238,9 @@ static int i2c_pxa_probe(struct platform_device *dev)
i2c->reg_idbr = i2c->reg_base + pxa_reg_layout[i2c_type].idbr;
i2c->reg_icr = i2c->reg_base + pxa_reg_layout[i2c_type].icr;
i2c->reg_isr = i2c->reg_base + pxa_reg_layout[i2c_type].isr;
i2c->fm_mask = pxa_reg_layout[i2c_type].fm ? : ICR_FM;
i2c->hs_mask = pxa_reg_layout[i2c_type].hs ? : ICR_HS;
if (i2c_type != REGS_CE4100)
i2c->reg_isar = i2c->reg_base + pxa_reg_layout[i2c_type].isar;