Markus Pargmann schrieb am 03.03.2015 um 08:58:
> This is the core driver for imx25 touchscreen/adc driver. The module
> has one shared ADC and two different conversion queues which use the
> ADC. The two queues are identical. Both can be used for general purpose
> ADC but one is meant to be used for touchscreens.
>
> This driver is the core which manages the central components and
> registers of the TSC/ADC unit. It manages the IRQs and forwards them to
> the correct components.
>
> Signed-off-by: Markus Pargmann <mpa@xxxxxxxxxxxxxx>
> Signed-off-by: Denis Carikli <denis@xxxxxxxxxx>
> Acked-by: Jonathan Cameron <jic23@xxxxxxxxxx>
> ---
>
Hi Markus,
I would recommend to make use of GENMASK for many of the masks you define below.
That makes it better readable from which to which bitnumber that mask applies.
Thanks,
Hartmut
<...>
> diff --git a/include/linux/mfd/imx25-tsadc.h b/include/linux/mfd/imx25-tsadc.h
> new file mode 100644
> index 000000000000..da348ac34a41
> --- /dev/null
> +++ b/include/linux/mfd/imx25-tsadc.h
> @@ -0,0 +1,141 @@
> +#ifndef _LINUX_INCLUDE_INPUT_IMX25_TSADC_H_
> +#define _LINUX_INCLUDE_INPUT_IMX25_TSADC_H_
> +
> +struct regmap;
> +struct device;
> +struct clk;
> +
> +struct mx25_tsadc {
> + struct regmap *regs;
> + struct irq_domain *domain;
> + struct clk *clk;
> +};
> +
> +#define MX25_TSC_TGCR 0x00
> +#define MX25_TSC_TGSR 0x04
> +#define MX25_TSC_TICR 0x08
> +
> +/* The same register layout for TC and GC queue */
> +#define MX25_ADCQ_FIFO 0x00
> +#define MX25_ADCQ_CR 0x04
> +#define MX25_ADCQ_SR 0x08
> +#define MX25_ADCQ_MR 0x0c
> +#define MX25_ADCQ_ITEM_7_0 0x20
> +#define MX25_ADCQ_ITEM_15_8 0x24
> +#define MX25_ADCQ_CFG(n) (0x40 + ((n) * 0x4))
> +
> +#define MX25_ADCQ_MR_MASK 0xffffffff
> +
> +/* TGCR */
> +#define MX25_TGCR_PDBTIME(x) ((x) << 25)
> +#define MX25_TGCR_PDBTIME_MASK MX25_TGCR_PDBTIME(0x7f)
> +#define MX25_TGCR_PDBEN BIT(24)
> +#define MX25_TGCR_PDEN BIT(23)
> +#define MX25_TGCR_ADCCLKCFG(x) ((x) << 16)
> +#define MX25_TGCR_GET_ADCCLK(x) (((x) >> 16) & 0x1f)
> +#define MX25_TGCR_INTREFEN BIT(10)
> +#define MX25_TGCR_POWERMODE_MASK (3 << 8)
> +#define MX25_TGCR_POWERMODE_SAVE (1 << 8)
> +#define MX25_TGCR_POWERMODE_ON (2 << 8)
> +#define MX25_TGCR_STLC BIT(5)
> +#define MX25_TGCR_SLPC BIT(4)
> +#define MX25_TGCR_FUNC_RST BIT(2)
> +#define MX25_TGCR_TSC_RST BIT(1)
> +#define MX25_TGCR_CLK_EN BIT(0)
> +
> +/* TGSR */
> +#define MX25_TGSR_SLP_INT BIT(2)
> +#define MX25_TGSR_GCQ_INT BIT(1)
> +#define MX25_TGSR_TCQ_INT BIT(0)
> +
> +/* ADCQ_ITEM_* */
> +#define _MX25_ADCQ_ITEM(item, x) ((x) << ((item) * 4))
> +#define MX25_ADCQ_ITEM(item, x) ((item) >= 8 ? \
> + _MX25_ADCQ_ITEM((item) - 8, (x)) : _MX25_ADCQ_ITEM((item), (x)))
> +
> +/* ADCQ_FIFO (TCQFIFO and GCQFIFO) */
> +#define MX25_ADCQ_FIFO_DATA(x) (((x) >> 4) & 0xfff)
> +#define MX25_ADCQ_FIFO_ID(x) ((x) & 0xf)
> +
> +/* ADCQ_CR (TCQR and GCQR) */
> +#define MX25_ADCQ_CR_PDCFG_LEVEL BIT(19)
> +#define MX25_ADCQ_CR_PDMSK BIT(18)
> +#define MX25_ADCQ_CR_FRST BIT(17)
> +#define MX25_ADCQ_CR_QRST BIT(16)
> +#define MX25_ADCQ_CR_RWAIT_MASK (0xf << 12)
> +#define MX25_ADCQ_CR_RWAIT(x) ((x) << 12)
> +#define MX25_ADCQ_CR_WMRK_MASK (0xf << 8)
> +#define MX25_ADCQ_CR_WMRK(x) ((x) << 8)
> +#define MX25_ADCQ_CR_LITEMID_MASK (0xf << 4)
> +#define MX25_ADCQ_CR_LITEMID(x) ((x) << 4)
> +#define MX25_ADCQ_CR_RPT BIT(3)
> +#define MX25_ADCQ_CR_FQS BIT(2)
> +#define MX25_ADCQ_CR_QSM_MASK 0x3
> +#define MX25_ADCQ_CR_QSM_PD 0x1
> +#define MX25_ADCQ_CR_QSM_FQS 0x2
> +#define MX25_ADCQ_CR_QSM_FQS_PD 0x3
> +
> +/* ADCQ_SR (TCQSR and GCQSR) */
> +#define MX25_ADCQ_SR_FDRY BIT(15)
> +#define MX25_ADCQ_SR_FULL BIT(14)
> +#define MX25_ADCQ_SR_EMPT BIT(13)
> +#define MX25_ADCQ_SR_FDN(x) (((x) >> 8) & 0x1f)
> +#define MX25_ADCQ_SR_FRR BIT(6)
> +#define MX25_ADCQ_SR_FUR BIT(5)
> +#define MX25_ADCQ_SR_FOR BIT(4)
> +#define MX25_ADCQ_SR_EOQ BIT(1)
> +#define MX25_ADCQ_SR_PD BIT(0)
> +
> +/* ADCQ_MR (TCQMR and GCQMR) */
> +#define MX25_ADCQ_MR_FDRY_DMA BIT(31)
> +#define MX25_ADCQ_MR_FER_DMA BIT(22)
> +#define MX25_ADCQ_MR_FUR_DMA BIT(21)
> +#define MX25_ADCQ_MR_FOR_DMA BIT(20)
> +#define MX25_ADCQ_MR_EOQ_DMA BIT(17)
> +#define MX25_ADCQ_MR_PD_DMA BIT(16)
> +#define MX25_ADCQ_MR_FDRY_IRQ BIT(15)
> +#define MX25_ADCQ_MR_FER_IRQ BIT(6)
> +#define MX25_ADCQ_MR_FUR_IRQ BIT(5)
> +#define MX25_ADCQ_MR_FOR_IRQ BIT(4)
> +#define MX25_ADCQ_MR_EOQ_IRQ BIT(1)
> +#define MX25_ADCQ_MR_PD_IRQ BIT(0)
> +
> +/* ADCQ_CFG (TICR, TCC0-7,GCC0-7) */
> +#define MX25_ADCQ_CFG_SETTLING_TIME(x) ((x) << 24)
> +#define MX25_ADCQ_CFG_IGS (1 << 20)
> +#define MX25_ADCQ_CFG_NOS_MASK (0xf << 16)
> +#define MX25_ADCQ_CFG_NOS(x) (((x) - 1) << 16)
> +#define MX25_ADCQ_CFG_WIPER (1 << 15)
> +#define MX25_ADCQ_CFG_YNLR (1 << 14)
> +#define MX25_ADCQ_CFG_YPLL_HIGH (0 << 12)
> +#define MX25_ADCQ_CFG_YPLL_OFF (1 << 12)
> +#define MX25_ADCQ_CFG_YPLL_LOW (3 << 12)
> +#define MX25_ADCQ_CFG_XNUR_HIGH (0 << 10)
> +#define MX25_ADCQ_CFG_XNUR_OFF (1 << 10)
> +#define MX25_ADCQ_CFG_XNUR_LOW (3 << 10)
> +#define MX25_ADCQ_CFG_XPUL_HIGH (0 << 9)
> +#define MX25_ADCQ_CFG_XPUL_OFF (1 << 9)
> +#define MX25_ADCQ_CFG_REFP(sel) ((sel) << 7)
> +#define MX25_ADCQ_CFG_REFP_YP (0 << 7)
> +#define MX25_ADCQ_CFG_REFP_XP (1 << 7)
> +#define MX25_ADCQ_CFG_REFP_EXT (2 << 7)
> +#define MX25_ADCQ_CFG_REFP_INT (3 << 7)
> +#define MX25_ADCQ_CFG_REFP_MASK (3 << 7)
> +#define MX25_ADCQ_CFG_IN(sel) ((sel) << 4)
> +#define MX25_ADCQ_CFG_IN_XP (0 << 4)
> +#define MX25_ADCQ_CFG_IN_YP (1 << 4)
> +#define MX25_ADCQ_CFG_IN_XN (2 << 4)
> +#define MX25_ADCQ_CFG_IN_YN (3 << 4)
> +#define MX25_ADCQ_CFG_IN_WIPER (4 << 4)
> +#define MX25_ADCQ_CFG_IN_AUX0 (5 << 4)
> +#define MX25_ADCQ_CFG_IN_AUX1 (6 << 4)
> +#define MX25_ADCQ_CFG_IN_AUX2 (7 << 4)
> +#define MX25_ADCQ_CFG_REFN(sel) ((sel) << 2)
> +#define MX25_ADCQ_CFG_REFN_XN (0 << 2)
> +#define MX25_ADCQ_CFG_REFN_YN (1 << 2)
> +#define MX25_ADCQ_CFG_REFN_NGND (2 << 2)
> +#define MX25_ADCQ_CFG_REFN_NGND2 (3 << 2)
> +#define MX25_ADCQ_CFG_REFN_MASK (3 << 2)
> +#define MX25_ADCQ_CFG_PENIACK (1 << 1)
> +
> +#endif /* _LINUX_INCLUDE_INPUT_IMX25_TSADC_H_ */
>
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