From: Stefan Agner <stefan@agner.ch>
To: patrice.chotard@st.com
Cc: lee.jones@linaro.org, linus.walleij@linaro.org, gnurou@gmail.com,
linux-gpio@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org, maxime.coquelin@st.com,
amelie.delaunay@st.com, shawnguo@kernel.org,
kernel@pengutronix.de, dinguyen@opensource.altera.com,
vireshk@kernel.org, shiraz.linux.kernel@gmail.com,
thierry.reding@gmail.com, marcel.ziswiler@toradex.com,
dev@lynxeye.de
Subject: Re: [PATCH v2 02/10] mfd: stmpe: Add reset support for all STMPE variant
Date: Sat, 06 Aug 2016 19:54:03 -0700 [thread overview]
Message-ID: <8798334c6e5272a08ed665f7fc649fd1@agner.ch> (raw)
In-Reply-To: <1461845589-4826-3-git-send-email-patrice.chotard@st.com>
On 2016-04-28 05:13, patrice.chotard@st.com wrote:
> From: Patrice Chotard <patrice.chotard@st.com>
>
> Reset was only implemented for STMPE1801 variant despite
> all variant have a SOFT_RESET bit.
>
> For STMPE2401/2403/801/1601/1801 SOFT_RESET bit is bit 7
> of SYS_CTRL register.
> For STMPE610/811 (which have the same variant id) SOFT_RESET
> bit is bit 1 of SYS_CTRL register.
>
> Signed-off-by: Patrice Chotard <patrice.chotard@st.com>
> Acked-by: Linus Walleij <linus.walleij@linaro.org>
> Acked-by: Lee Jones <lee.jones@linaro.org>
> ---
> drivers/mfd/stmpe.c | 23 +++++++++++++++--------
> drivers/mfd/stmpe.h | 7 +++++--
> 2 files changed, 20 insertions(+), 10 deletions(-)
>
> diff --git a/drivers/mfd/stmpe.c b/drivers/mfd/stmpe.c
> index c553b73..af682d0 100644
> --- a/drivers/mfd/stmpe.c
> +++ b/drivers/mfd/stmpe.c
> @@ -735,13 +735,22 @@ static int stmpe1801_enable(struct stmpe *stmpe,
> unsigned int blocks,
> enable ? mask : 0);
> }
>
> -static int stmpe1801_reset(struct stmpe *stmpe)
> +static int stmpe_reset(struct stmpe *stmpe)
> {
> + u16 id_val = stmpe->variant->id_val;
> unsigned long timeout;
> int ret = 0;
> + u8 reset_bit;
> +
> + if (id_val == STMPE811_ID)
> + /* STMPE801 and STMPE610 use bit 1 of SYS_CTRL register */
> + reset_bit = STMPE811_SYS_CTRL_RESET;
> + else
> + /* all other STMPE variant use bit 7 of SYS_CTRL register */
> + reset_bit = STMPE_SYS_CTRL_RESET;
Wouldn't it be nicer to have this in struct stmpe_variant_info like
id_mask...?
--
Stefan
>
> ret = __stmpe_set_bits(stmpe, stmpe->regs[STMPE_IDX_SYS_CTRL],
> - STMPE1801_MSK_SYS_CTRL_RESET, STMPE1801_MSK_SYS_CTRL_RESET);
> + reset_bit, reset_bit);
> if (ret < 0)
> return ret;
>
> @@ -750,7 +759,7 @@ static int stmpe1801_reset(struct stmpe *stmpe)
> ret = __stmpe_reg_read(stmpe, stmpe->regs[STMPE_IDX_SYS_CTRL]);
> if (ret < 0)
> return ret;
> - if (!(ret & STMPE1801_MSK_SYS_CTRL_RESET))
> + if (!(ret & reset_bit))
> return 0;
> usleep_range(100, 200);
> }
> @@ -1074,11 +1083,9 @@ static int stmpe_chip_init(struct stmpe *stmpe)
> if (ret)
> return ret;
>
> - if (id == STMPE1801_ID) {
> - ret = stmpe1801_reset(stmpe);
> - if (ret < 0)
> - return ret;
> - }
> + ret = stmpe_reset(stmpe);
> + if (ret < 0)
> + return ret;
>
> if (stmpe->irq >= 0) {
> if (id == STMPE801_ID)
> diff --git a/drivers/mfd/stmpe.h b/drivers/mfd/stmpe.h
> index 406f9f2..4ae343d 100644
> --- a/drivers/mfd/stmpe.h
> +++ b/drivers/mfd/stmpe.h
> @@ -104,6 +104,8 @@ int stmpe_remove(struct stmpe *stmpe);
> #define STMPE_ICR_LSB_EDGE (1 << 1)
> #define STMPE_ICR_LSB_GIM (1 << 0)
>
> +#define STMPE_SYS_CTRL_RESET (1 << 7)
> +
> /*
> * STMPE801
> */
> @@ -126,6 +128,7 @@ int stmpe_remove(struct stmpe *stmpe);
> /*
> * STMPE811
> */
> +#define STMPE811_ID 0x0811
>
> #define STMPE811_IRQ_TOUCH_DET 0
> #define STMPE811_IRQ_FIFO_TH 1
> @@ -155,6 +158,8 @@ int stmpe_remove(struct stmpe *stmpe);
> #define STMPE811_REG_GPIO_FE 0x16
> #define STMPE811_REG_GPIO_AF 0x17
>
> +#define STMPE811_SYS_CTRL_RESET (1 << 1)
> +
> #define STMPE811_SYS_CTRL2_ADC_OFF (1 << 0)
> #define STMPE811_SYS_CTRL2_TSC_OFF (1 << 1)
> #define STMPE811_SYS_CTRL2_GPIO_OFF (1 << 2)
> @@ -244,8 +249,6 @@ int stmpe_remove(struct stmpe *stmpe);
> #define STMPE1801_REG_GPIO_PULL_UP_MID 0x23
> #define STMPE1801_REG_GPIO_PULL_UP_HIGH 0x24
>
> -#define STMPE1801_MSK_SYS_CTRL_RESET (1 << 7)
> -
> #define STMPE1801_MSK_INT_EN_KPC (1 << 1)
> #define STMPE1801_MSK_INT_EN_GPIO (1 << 3)
next prev parent reply other threads:[~2016-08-07 2:59 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-04-28 12:12 [PATCH v2 00/10] STMPE fixes/rework and add STMPE1600 support patrice.chotard
2016-04-28 12:13 ` [PATCH v2 01/10] mfd: stmpe: Add STMPE_IDX_SYS_CTRL/2 enum patrice.chotard
2016-04-28 12:13 ` [PATCH v2 02/10] mfd: stmpe: Add reset support for all STMPE variant patrice.chotard
2016-08-07 2:54 ` Stefan Agner [this message]
2016-08-10 16:00 ` Patrice Chotard
2016-04-28 12:13 ` [PATCH v2 03/10] gpio: stmpe: fix edge and rising/falling edge detection patrice.chotard
2016-04-28 12:13 ` [PATCH v2 04/10] gpio: stmpe: write int status register only when needed patrice.chotard
2016-04-28 12:13 ` [PATCH v2 05/10] mfd: stmpe: use generic bit mask name patrice.chotard
2016-08-04 15:05 ` Lee Jones
2016-04-28 12:13 ` [PATCH v2 06/10] mfd: stmpe: rework registers access patrice.chotard
2016-04-29 7:42 ` Linus Walleij
2016-04-28 12:13 ` [PATCH v2 07/10] gpio: " patrice.chotard
2016-04-29 7:42 ` Linus Walleij
2016-04-28 12:13 ` [PATCH v2 08/10] Documentation: dt: add stmpe1600 compatible string to stmpe mfd patrice.chotard
2016-04-28 12:13 ` [PATCH v2 09/10] mfd: Add STMPE1600 support patrice.chotard
2016-08-04 15:10 ` Lee Jones
2016-04-28 12:13 ` [PATCH v2 10/10] gpio: stmpe: " patrice.chotard
2016-04-29 7:44 ` Linus Walleij
2016-04-29 7:45 ` [PATCH v2 00/10] STMPE fixes/rework and add " Linus Walleij
2016-04-29 19:23 ` Marcel Ziswiler
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=8798334c6e5272a08ed665f7fc649fd1@agner.ch \
--to=stefan@agner.ch \
--cc=amelie.delaunay@st.com \
--cc=dev@lynxeye.de \
--cc=dinguyen@opensource.altera.com \
--cc=gnurou@gmail.com \
--cc=kernel@pengutronix.de \
--cc=lee.jones@linaro.org \
--cc=linus.walleij@linaro.org \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-gpio@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=marcel.ziswiler@toradex.com \
--cc=maxime.coquelin@st.com \
--cc=patrice.chotard@st.com \
--cc=shawnguo@kernel.org \
--cc=shiraz.linux.kernel@gmail.com \
--cc=thierry.reding@gmail.com \
--cc=vireshk@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).