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Message-ID: <1461845589-4826-10-git-send-email-patrice.chotard@st.com>
Date: Thu, 28 Apr 2016 14:13:08 +0200
From: <patrice.chotard@...com>
To: <lee.jones@...aro.org>, <linus.walleij@...aro.org>,
<gnurou@...il.com>, <linux-gpio@...r.kernel.org>,
<linux-kernel@...r.kernel.org>
CC: <linux-arm-kernel@...ts.infradead.org>, <maxime.coquelin@...com>,
<amelie.delaunay@...com>, <shawnguo@...nel.org>,
<kernel@...gutronix.de>, <dinguyen@...nsource.altera.com>,
<vireshk@...nel.org>, <shiraz.linux.kernel@...il.com>,
<thierry.reding@...il.com>, <gnurou@...il.com>,
Patrice Chotard <patrice.chotard@...com>,
<marcel.ziswiler@...adex.com>, <stefan@...er.ch>, <dev@...xeye.de>
Subject: [PATCH v2 09/10] mfd: Add STMPE1600 support
From: Patrice Chotard <patrice.chotard@...com>
STMPE1600 is a 16-bit port expander.
Datasheet is available here :
http://www2.st.com/content/st_com/en/products/interfaces-and-transceivers/
i-o-expanders-and-level-translators/i-o-expanders/stmpe1600.html
Signed-off-by: Amelie DELAUNAY <amelie.delaunay@...com>
Signed-off-by: Patrice Chotard <patrice.chotard@...com>
Acked-by: Linus Walleij <linus.walleij@...aro.org>
---
drivers/mfd/stmpe-i2c.c | 2 ++
drivers/mfd/stmpe.c | 65 +++++++++++++++++++++++++++++++++++++++++++----
drivers/mfd/stmpe.h | 21 +++++++++++++++
include/linux/mfd/stmpe.h | 1 +
4 files changed, 84 insertions(+), 5 deletions(-)
diff --git a/drivers/mfd/stmpe-i2c.c b/drivers/mfd/stmpe-i2c.c
index c3f4aab..863c39a 100644
--- a/drivers/mfd/stmpe-i2c.c
+++ b/drivers/mfd/stmpe-i2c.c
@@ -57,6 +57,7 @@ static const struct of_device_id stmpe_of_match[] = {
{ .compatible = "st,stmpe610", .data = (void *)STMPE610, },
{ .compatible = "st,stmpe801", .data = (void *)STMPE801, },
{ .compatible = "st,stmpe811", .data = (void *)STMPE811, },
+ { .compatible = "st,stmpe1600", .data = (void *)STMPE1600, },
{ .compatible = "st,stmpe1601", .data = (void *)STMPE1601, },
{ .compatible = "st,stmpe1801", .data = (void *)STMPE1801, },
{ .compatible = "st,stmpe2401", .data = (void *)STMPE2401, },
@@ -101,6 +102,7 @@ static const struct i2c_device_id stmpe_i2c_id[] = {
{ "stmpe610", STMPE610 },
{ "stmpe801", STMPE801 },
{ "stmpe811", STMPE811 },
+ { "stmpe1600", STMPE1600 },
{ "stmpe1601", STMPE1601 },
{ "stmpe1801", STMPE1801 },
{ "stmpe2401", STMPE2401 },
diff --git a/drivers/mfd/stmpe.c b/drivers/mfd/stmpe.c
index a060809..3a65331 100644
--- a/drivers/mfd/stmpe.c
+++ b/drivers/mfd/stmpe.c
@@ -532,6 +532,59 @@ static struct stmpe_variant_info stmpe610 = {
};
/*
+ * STMPE1600
+ * Compared to all others STMPE variant, LSB and MSB regs are located in this
+ * order : LSB addr
+ * MSB addr + 1
+ * As there is only 2 * 8bits registers for GPMR/GPSR/IEGPIOPR, CSB index is MSB registers
+ */
+
+static const u8 stmpe1600_regs[] = {
+ [STMPE_IDX_CHIP_ID] = STMPE1600_REG_CHIP_ID,
+ [STMPE_IDX_SYS_CTRL] = STMPE1600_REG_SYS_CTRL,
+ [STMPE_IDX_ICR_LSB] = STMPE1600_REG_SYS_CTRL,
+ [STMPE_IDX_GPMR_LSB] = STMPE1600_REG_GPMR_LSB,
+ [STMPE_IDX_GPMR_CSB] = STMPE1600_REG_GPMR_MSB,
+ [STMPE_IDX_GPSR_LSB] = STMPE1600_REG_GPSR_LSB,
+ [STMPE_IDX_GPSR_CSB] = STMPE1600_REG_GPSR_MSB,
+ [STMPE_IDX_GPDR_LSB] = STMPE1600_REG_GPDR_LSB,
+ [STMPE_IDX_GPDR_CSB] = STMPE1600_REG_GPDR_MSB,
+ [STMPE_IDX_IEGPIOR_LSB] = STMPE1600_REG_IEGPIOR_LSB,
+ [STMPE_IDX_IEGPIOR_CSB] = STMPE1600_REG_IEGPIOR_MSB,
+ [STMPE_IDX_ISGPIOR_LSB] = STMPE1600_REG_ISGPIOR_LSB,
+};
+
+static struct stmpe_variant_block stmpe1600_blocks[] = {
+ {
+ .cell = &stmpe_gpio_cell,
+ .irq = 0,
+ .block = STMPE_BLOCK_GPIO,
+ },
+};
+
+static int stmpe1600_enable(struct stmpe *stmpe, unsigned int blocks,
+ bool enable)
+{
+ if (blocks & STMPE_BLOCK_GPIO)
+ return 0;
+ else
+ return -EINVAL;
+}
+
+static struct stmpe_variant_info stmpe1600 = {
+ .name = "stmpe1600",
+ .id_val = STMPE1600_ID,
+ .id_mask = 0xffff,
+ .num_gpios = 16,
+ .af_bits = 0,
+ .regs = stmpe1600_regs,
+ .blocks = stmpe1600_blocks,
+ .num_blocks = ARRAY_SIZE(stmpe1600_blocks),
+ .num_irqs = STMPE1600_NR_INTERNAL_IRQS,
+ .enable = stmpe1600_enable,
+};
+
+/*
* STMPE1601
*/
@@ -928,6 +981,7 @@ static struct stmpe_variant_info *stmpe_variant_info[STMPE_NBR_PARTS] = {
[STMPE610] = &stmpe610,
[STMPE801] = &stmpe801,
[STMPE811] = &stmpe811,
+ [STMPE1600] = &stmpe1600,
[STMPE1601] = &stmpe1601,
[STMPE1801] = &stmpe1801,
[STMPE2401] = &stmpe2401,
@@ -954,7 +1008,8 @@ static irqreturn_t stmpe_irq(int irq, void *data)
int ret;
int i;
- if (variant->id_val == STMPE801_ID) {
+ if (variant->id_val == STMPE801_ID ||
+ variant->id_val == STMPE1600_ID) {
int base = irq_create_mapping(stmpe->domain, 0);
handle_nested_irq(base);
@@ -1128,13 +1183,13 @@ static int stmpe_chip_init(struct stmpe *stmpe)
return ret;
if (stmpe->irq >= 0) {
- if (id == STMPE801_ID)
+ if (id == STMPE801_ID || id == STMPE1600_ID)
icr = STMPE_SYS_CTRL_INT_EN;
else
icr = STMPE_ICR_LSB_GIM;
- /* STMPE801 doesn't support Edge interrupts */
- if (id != STMPE801_ID) {
+ /* STMPE801 and STMPE1600 don't support Edge interrupts */
+ if (id != STMPE801_ID && id != STMPE1600_ID) {
if (irq_trigger == IRQF_TRIGGER_FALLING ||
irq_trigger == IRQF_TRIGGER_RISING)
icr |= STMPE_ICR_LSB_EDGE;
@@ -1142,7 +1197,7 @@ static int stmpe_chip_init(struct stmpe *stmpe)
if (irq_trigger == IRQF_TRIGGER_RISING ||
irq_trigger == IRQF_TRIGGER_HIGH) {
- if (id == STMPE801_ID)
+ if (id == STMPE801_ID || id == STMPE1600_ID)
icr |= STMPE_SYS_CTRL_INT_HI;
else
icr |= STMPE_ICR_LSB_HIGH;
diff --git a/drivers/mfd/stmpe.h b/drivers/mfd/stmpe.h
index f127342..f7efdd8 100644
--- a/drivers/mfd/stmpe.h
+++ b/drivers/mfd/stmpe.h
@@ -164,6 +164,27 @@ int stmpe_remove(struct stmpe *stmpe);
#define STMPE811_SYS_CTRL2_TS_OFF (1 << 3)
/*
+ * STMPE1600
+ */
+#define STMPE1600_ID 0x0016
+#define STMPE1600_NR_INTERNAL_IRQS 16
+
+#define STMPE1600_REG_CHIP_ID 0x00
+#define STMPE1600_REG_SYS_CTRL 0x03
+#define STMPE1600_REG_IEGPIOR_LSB 0x08
+#define STMPE1600_REG_IEGPIOR_MSB 0x09
+#define STMPE1600_REG_ISGPIOR_LSB 0x0A
+#define STMPE1600_REG_ISGPIOR_MSB 0x0B
+#define STMPE1600_REG_GPMR_LSB 0x10
+#define STMPE1600_REG_GPMR_MSB 0x11
+#define STMPE1600_REG_GPSR_LSB 0x12
+#define STMPE1600_REG_GPSR_MSB 0x13
+#define STMPE1600_REG_GPDR_LSB 0x14
+#define STMPE1600_REG_GPDR_MSB 0x15
+#define STMPE1600_REG_GPPIR_LSB 0x16
+#define STMPE1600_REG_GPPIR_MSB 0x17
+
+/*
* STMPE1601
*/
diff --git a/include/linux/mfd/stmpe.h b/include/linux/mfd/stmpe.h
index 3dced4a..0170bd6 100644
--- a/include/linux/mfd/stmpe.h
+++ b/include/linux/mfd/stmpe.h
@@ -26,6 +26,7 @@ enum stmpe_partnum {
STMPE610,
STMPE801,
STMPE811,
+ STMPE1600,
STMPE1601,
STMPE1801,
STMPE2401,
--
1.9.1
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