![Chao Xie](/assets/img/avatar_default.png)
User pass platform data to device, and platform data may be NULL. Add the check for pdata. Signed-off-by: Chao Xie <chao.xie@marvell.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
636 lines
15 KiB
C
636 lines
15 KiB
C
/*
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* Base driver for Marvell 88PM800
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*
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* Copyright (C) 2012 Marvell International Ltd.
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* Haojian Zhuang <haojian.zhuang@marvell.com>
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* Joseph(Yossi) Hanin <yhanin@marvell.com>
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* Qiao Zhou <zhouqiao@marvell.com>
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*
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* This file is subject to the terms and conditions of the GNU General
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* Public License. See the file "COPYING" in the main directory of this
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* archive for more details.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/err.h>
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#include <linux/i2c.h>
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#include <linux/mfd/core.h>
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#include <linux/mfd/88pm80x.h>
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#include <linux/slab.h>
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/* Interrupt Registers */
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#define PM800_INT_STATUS1 (0x05)
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#define PM800_ONKEY_INT_STS1 (1 << 0)
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#define PM800_EXTON_INT_STS1 (1 << 1)
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#define PM800_CHG_INT_STS1 (1 << 2)
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#define PM800_BAT_INT_STS1 (1 << 3)
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#define PM800_RTC_INT_STS1 (1 << 4)
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#define PM800_CLASSD_OC_INT_STS1 (1 << 5)
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#define PM800_INT_STATUS2 (0x06)
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#define PM800_VBAT_INT_STS2 (1 << 0)
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#define PM800_VSYS_INT_STS2 (1 << 1)
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#define PM800_VCHG_INT_STS2 (1 << 2)
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#define PM800_TINT_INT_STS2 (1 << 3)
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#define PM800_GPADC0_INT_STS2 (1 << 4)
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#define PM800_TBAT_INT_STS2 (1 << 5)
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#define PM800_GPADC2_INT_STS2 (1 << 6)
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#define PM800_GPADC3_INT_STS2 (1 << 7)
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#define PM800_INT_STATUS3 (0x07)
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#define PM800_INT_STATUS4 (0x08)
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#define PM800_GPIO0_INT_STS4 (1 << 0)
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#define PM800_GPIO1_INT_STS4 (1 << 1)
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#define PM800_GPIO2_INT_STS4 (1 << 2)
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#define PM800_GPIO3_INT_STS4 (1 << 3)
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#define PM800_GPIO4_INT_STS4 (1 << 4)
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#define PM800_INT_ENA_1 (0x09)
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#define PM800_ONKEY_INT_ENA1 (1 << 0)
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#define PM800_EXTON_INT_ENA1 (1 << 1)
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#define PM800_CHG_INT_ENA1 (1 << 2)
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#define PM800_BAT_INT_ENA1 (1 << 3)
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#define PM800_RTC_INT_ENA1 (1 << 4)
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#define PM800_CLASSD_OC_INT_ENA1 (1 << 5)
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#define PM800_INT_ENA_2 (0x0A)
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#define PM800_VBAT_INT_ENA2 (1 << 0)
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#define PM800_VSYS_INT_ENA2 (1 << 1)
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#define PM800_VCHG_INT_ENA2 (1 << 2)
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#define PM800_TINT_INT_ENA2 (1 << 3)
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#define PM800_INT_ENA_3 (0x0B)
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#define PM800_GPADC0_INT_ENA3 (1 << 0)
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#define PM800_GPADC1_INT_ENA3 (1 << 1)
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#define PM800_GPADC2_INT_ENA3 (1 << 2)
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#define PM800_GPADC3_INT_ENA3 (1 << 3)
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#define PM800_GPADC4_INT_ENA3 (1 << 4)
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#define PM800_INT_ENA_4 (0x0C)
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#define PM800_GPIO0_INT_ENA4 (1 << 0)
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#define PM800_GPIO1_INT_ENA4 (1 << 1)
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#define PM800_GPIO2_INT_ENA4 (1 << 2)
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#define PM800_GPIO3_INT_ENA4 (1 << 3)
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#define PM800_GPIO4_INT_ENA4 (1 << 4)
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/* number of INT_ENA & INT_STATUS regs */
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#define PM800_INT_REG_NUM (4)
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/* Interrupt Number in 88PM800 */
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enum {
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PM800_IRQ_ONKEY, /*EN1b0 *//*0 */
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PM800_IRQ_EXTON, /*EN1b1 */
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PM800_IRQ_CHG, /*EN1b2 */
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PM800_IRQ_BAT, /*EN1b3 */
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PM800_IRQ_RTC, /*EN1b4 */
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PM800_IRQ_CLASSD, /*EN1b5 *//*5 */
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PM800_IRQ_VBAT, /*EN2b0 */
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PM800_IRQ_VSYS, /*EN2b1 */
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PM800_IRQ_VCHG, /*EN2b2 */
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PM800_IRQ_TINT, /*EN2b3 */
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PM800_IRQ_GPADC0, /*EN3b0 *//*10 */
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PM800_IRQ_GPADC1, /*EN3b1 */
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PM800_IRQ_GPADC2, /*EN3b2 */
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PM800_IRQ_GPADC3, /*EN3b3 */
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PM800_IRQ_GPADC4, /*EN3b4 */
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PM800_IRQ_GPIO0, /*EN4b0 *//*15 */
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PM800_IRQ_GPIO1, /*EN4b1 */
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PM800_IRQ_GPIO2, /*EN4b2 */
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PM800_IRQ_GPIO3, /*EN4b3 */
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PM800_IRQ_GPIO4, /*EN4b4 *//*19 */
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PM800_MAX_IRQ,
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};
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/* PM800: generation identification number */
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#define PM800_CHIP_GEN_ID_NUM 0x3
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static const struct i2c_device_id pm80x_id_table[] = {
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{"88PM800", 0},
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{} /* NULL terminated */
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};
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MODULE_DEVICE_TABLE(i2c, pm80x_id_table);
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static struct resource rtc_resources[] = {
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{
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.name = "88pm80x-rtc",
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.start = PM800_IRQ_RTC,
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.end = PM800_IRQ_RTC,
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.flags = IORESOURCE_IRQ,
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},
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};
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static struct mfd_cell rtc_devs[] = {
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{
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.name = "88pm80x-rtc",
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.num_resources = ARRAY_SIZE(rtc_resources),
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.resources = &rtc_resources[0],
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.id = -1,
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},
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};
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static struct resource onkey_resources[] = {
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{
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.name = "88pm80x-onkey",
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.start = PM800_IRQ_ONKEY,
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.end = PM800_IRQ_ONKEY,
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.flags = IORESOURCE_IRQ,
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},
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};
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static struct mfd_cell onkey_devs[] = {
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{
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.name = "88pm80x-onkey",
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.num_resources = 1,
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.resources = &onkey_resources[0],
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.id = -1,
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},
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};
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static struct mfd_cell regulator_devs[] = {
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{
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.name = "88pm80x-regulator",
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.id = -1,
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},
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};
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static const struct regmap_irq pm800_irqs[] = {
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/* INT0 */
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[PM800_IRQ_ONKEY] = {
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.mask = PM800_ONKEY_INT_ENA1,
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},
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[PM800_IRQ_EXTON] = {
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.mask = PM800_EXTON_INT_ENA1,
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},
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[PM800_IRQ_CHG] = {
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.mask = PM800_CHG_INT_ENA1,
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},
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[PM800_IRQ_BAT] = {
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.mask = PM800_BAT_INT_ENA1,
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},
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[PM800_IRQ_RTC] = {
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.mask = PM800_RTC_INT_ENA1,
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},
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[PM800_IRQ_CLASSD] = {
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.mask = PM800_CLASSD_OC_INT_ENA1,
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},
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/* INT1 */
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[PM800_IRQ_VBAT] = {
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.reg_offset = 1,
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.mask = PM800_VBAT_INT_ENA2,
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},
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[PM800_IRQ_VSYS] = {
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.reg_offset = 1,
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.mask = PM800_VSYS_INT_ENA2,
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},
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[PM800_IRQ_VCHG] = {
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.reg_offset = 1,
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.mask = PM800_VCHG_INT_ENA2,
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},
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[PM800_IRQ_TINT] = {
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.reg_offset = 1,
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.mask = PM800_TINT_INT_ENA2,
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},
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/* INT2 */
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[PM800_IRQ_GPADC0] = {
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.reg_offset = 2,
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.mask = PM800_GPADC0_INT_ENA3,
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},
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[PM800_IRQ_GPADC1] = {
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.reg_offset = 2,
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.mask = PM800_GPADC1_INT_ENA3,
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},
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[PM800_IRQ_GPADC2] = {
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.reg_offset = 2,
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.mask = PM800_GPADC2_INT_ENA3,
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},
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[PM800_IRQ_GPADC3] = {
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.reg_offset = 2,
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.mask = PM800_GPADC3_INT_ENA3,
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},
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[PM800_IRQ_GPADC4] = {
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.reg_offset = 2,
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.mask = PM800_GPADC4_INT_ENA3,
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},
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/* INT3 */
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[PM800_IRQ_GPIO0] = {
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.reg_offset = 3,
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.mask = PM800_GPIO0_INT_ENA4,
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},
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[PM800_IRQ_GPIO1] = {
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.reg_offset = 3,
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.mask = PM800_GPIO1_INT_ENA4,
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},
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[PM800_IRQ_GPIO2] = {
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.reg_offset = 3,
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.mask = PM800_GPIO2_INT_ENA4,
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},
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[PM800_IRQ_GPIO3] = {
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.reg_offset = 3,
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.mask = PM800_GPIO3_INT_ENA4,
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},
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[PM800_IRQ_GPIO4] = {
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.reg_offset = 3,
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.mask = PM800_GPIO4_INT_ENA4,
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},
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};
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static int device_gpadc_init(struct pm80x_chip *chip,
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struct pm80x_platform_data *pdata)
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{
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struct pm80x_subchip *subchip = chip->subchip;
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struct regmap *map = subchip->regmap_gpadc;
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int data = 0, mask = 0, ret = 0;
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if (!map) {
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dev_warn(chip->dev,
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"Warning: gpadc regmap is not available!\n");
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return -EINVAL;
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}
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/*
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* initialize GPADC without activating it turn on GPADC
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* measurments
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*/
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ret = regmap_update_bits(map,
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PM800_GPADC_MISC_CONFIG2,
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PM800_GPADC_MISC_GPFSM_EN,
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PM800_GPADC_MISC_GPFSM_EN);
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if (ret < 0)
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goto out;
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/*
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* This function configures the ADC as requires for
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* CP implementation.CP does not "own" the ADC configuration
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* registers and relies on AP.
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* Reason: enable automatic ADC measurements needed
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* for CP to get VBAT and RF temperature readings.
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*/
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ret = regmap_update_bits(map, PM800_GPADC_MEAS_EN1,
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PM800_MEAS_EN1_VBAT, PM800_MEAS_EN1_VBAT);
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if (ret < 0)
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goto out;
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ret = regmap_update_bits(map, PM800_GPADC_MEAS_EN2,
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(PM800_MEAS_EN2_RFTMP | PM800_MEAS_GP0_EN),
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(PM800_MEAS_EN2_RFTMP | PM800_MEAS_GP0_EN));
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if (ret < 0)
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goto out;
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/*
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* the defult of PM800 is GPADC operates at 100Ks/s rate
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* and Number of GPADC slots with active current bias prior
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* to GPADC sampling = 1 slot for all GPADCs set for
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* Temprature mesurmants
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*/
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mask = (PM800_GPADC_GP_BIAS_EN0 | PM800_GPADC_GP_BIAS_EN1 |
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PM800_GPADC_GP_BIAS_EN2 | PM800_GPADC_GP_BIAS_EN3);
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if (pdata && (pdata->batt_det == 0))
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data = (PM800_GPADC_GP_BIAS_EN0 | PM800_GPADC_GP_BIAS_EN1 |
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PM800_GPADC_GP_BIAS_EN2 | PM800_GPADC_GP_BIAS_EN3);
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else
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data = (PM800_GPADC_GP_BIAS_EN0 | PM800_GPADC_GP_BIAS_EN2 |
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PM800_GPADC_GP_BIAS_EN3);
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ret = regmap_update_bits(map, PM800_GP_BIAS_ENA1, mask, data);
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if (ret < 0)
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goto out;
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dev_info(chip->dev, "pm800 device_gpadc_init: Done\n");
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return 0;
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out:
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dev_info(chip->dev, "pm800 device_gpadc_init: Failed!\n");
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return ret;
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}
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static int device_onkey_init(struct pm80x_chip *chip,
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struct pm80x_platform_data *pdata)
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{
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int ret;
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ret = mfd_add_devices(chip->dev, 0, &onkey_devs[0],
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ARRAY_SIZE(onkey_devs), &onkey_resources[0], 0,
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NULL);
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if (ret) {
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dev_err(chip->dev, "Failed to add onkey subdev\n");
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return ret;
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}
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return 0;
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}
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static int device_rtc_init(struct pm80x_chip *chip,
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struct pm80x_platform_data *pdata)
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{
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int ret;
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if (pdata) {
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rtc_devs[0].platform_data = pdata->rtc;
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rtc_devs[0].pdata_size =
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pdata->rtc ? sizeof(struct pm80x_rtc_pdata) : 0;
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}
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ret = mfd_add_devices(chip->dev, 0, &rtc_devs[0],
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ARRAY_SIZE(rtc_devs), NULL, 0, NULL);
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if (ret) {
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dev_err(chip->dev, "Failed to add rtc subdev\n");
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return ret;
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}
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return 0;
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}
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static int device_regulator_init(struct pm80x_chip *chip,
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struct pm80x_platform_data *pdata)
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{
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int ret;
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ret = mfd_add_devices(chip->dev, 0, ®ulator_devs[0],
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ARRAY_SIZE(regulator_devs), NULL, 0, NULL);
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if (ret) {
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dev_err(chip->dev, "Failed to add regulator subdev\n");
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return ret;
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}
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return 0;
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}
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static int device_irq_init_800(struct pm80x_chip *chip)
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{
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struct regmap *map = chip->regmap;
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unsigned long flags = IRQF_ONESHOT;
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int data, mask, ret = -EINVAL;
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if (!map || !chip->irq) {
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dev_err(chip->dev, "incorrect parameters\n");
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return -EINVAL;
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}
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/*
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* irq_mode defines the way of clearing interrupt. it's read-clear by
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* default.
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*/
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mask =
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PM800_WAKEUP2_INV_INT | PM800_WAKEUP2_INT_CLEAR |
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PM800_WAKEUP2_INT_MASK;
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data = PM800_WAKEUP2_INT_CLEAR;
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ret = regmap_update_bits(map, PM800_WAKEUP2, mask, data);
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if (ret < 0)
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goto out;
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ret =
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regmap_add_irq_chip(chip->regmap, chip->irq, flags, -1,
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chip->regmap_irq_chip, &chip->irq_data);
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out:
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return ret;
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}
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static void device_irq_exit_800(struct pm80x_chip *chip)
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{
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regmap_del_irq_chip(chip->irq, chip->irq_data);
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}
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static struct regmap_irq_chip pm800_irq_chip = {
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.name = "88pm800",
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.irqs = pm800_irqs,
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.num_irqs = ARRAY_SIZE(pm800_irqs),
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.num_regs = 4,
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.status_base = PM800_INT_STATUS1,
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.mask_base = PM800_INT_ENA_1,
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.ack_base = PM800_INT_STATUS1,
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.mask_invert = 1,
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};
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static int pm800_pages_init(struct pm80x_chip *chip)
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{
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struct pm80x_subchip *subchip;
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struct i2c_client *client = chip->client;
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int ret = 0;
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subchip = chip->subchip;
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if (!subchip || !subchip->power_page_addr || !subchip->gpadc_page_addr)
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return -ENODEV;
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/* PM800 block power page */
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subchip->power_page = i2c_new_dummy(client->adapter,
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subchip->power_page_addr);
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if (subchip->power_page == NULL) {
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ret = -ENODEV;
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goto out;
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}
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subchip->regmap_power = devm_regmap_init_i2c(subchip->power_page,
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&pm80x_regmap_config);
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if (IS_ERR(subchip->regmap_power)) {
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ret = PTR_ERR(subchip->regmap_power);
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dev_err(chip->dev,
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"Failed to allocate regmap_power: %d\n", ret);
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goto out;
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}
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i2c_set_clientdata(subchip->power_page, chip);
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/* PM800 block GPADC */
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subchip->gpadc_page = i2c_new_dummy(client->adapter,
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subchip->gpadc_page_addr);
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if (subchip->gpadc_page == NULL) {
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ret = -ENODEV;
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goto out;
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}
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subchip->regmap_gpadc = devm_regmap_init_i2c(subchip->gpadc_page,
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&pm80x_regmap_config);
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if (IS_ERR(subchip->regmap_gpadc)) {
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ret = PTR_ERR(subchip->regmap_gpadc);
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dev_err(chip->dev,
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"Failed to allocate regmap_gpadc: %d\n", ret);
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goto out;
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}
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i2c_set_clientdata(subchip->gpadc_page, chip);
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out:
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return ret;
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}
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static void pm800_pages_exit(struct pm80x_chip *chip)
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{
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struct pm80x_subchip *subchip;
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subchip = chip->subchip;
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if (subchip && subchip->power_page)
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i2c_unregister_device(subchip->power_page);
|
|
|
|
if (subchip && subchip->gpadc_page)
|
|
i2c_unregister_device(subchip->gpadc_page);
|
|
}
|
|
|
|
static int device_800_init(struct pm80x_chip *chip,
|
|
struct pm80x_platform_data *pdata)
|
|
{
|
|
int ret;
|
|
unsigned int val;
|
|
|
|
/*
|
|
* alarm wake up bit will be clear in device_irq_init(),
|
|
* read before that
|
|
*/
|
|
ret = regmap_read(chip->regmap, PM800_RTC_CONTROL, &val);
|
|
if (ret < 0) {
|
|
dev_err(chip->dev, "Failed to read RTC register: %d\n", ret);
|
|
goto out;
|
|
}
|
|
if (val & PM800_ALARM_WAKEUP) {
|
|
if (pdata && pdata->rtc)
|
|
pdata->rtc->rtc_wakeup = 1;
|
|
}
|
|
|
|
ret = device_gpadc_init(chip, pdata);
|
|
if (ret < 0) {
|
|
dev_err(chip->dev, "[%s]Failed to init gpadc\n", __func__);
|
|
goto out;
|
|
}
|
|
|
|
chip->regmap_irq_chip = &pm800_irq_chip;
|
|
|
|
ret = device_irq_init_800(chip);
|
|
if (ret < 0) {
|
|
dev_err(chip->dev, "[%s]Failed to init pm800 irq\n", __func__);
|
|
goto out;
|
|
}
|
|
|
|
ret = device_onkey_init(chip, pdata);
|
|
if (ret) {
|
|
dev_err(chip->dev, "Failed to add onkey subdev\n");
|
|
goto out_dev;
|
|
}
|
|
|
|
ret = device_rtc_init(chip, pdata);
|
|
if (ret) {
|
|
dev_err(chip->dev, "Failed to add rtc subdev\n");
|
|
goto out;
|
|
}
|
|
|
|
ret = device_regulator_init(chip, pdata);
|
|
if (ret) {
|
|
dev_err(chip->dev, "Failed to add regulators subdev\n");
|
|
goto out;
|
|
}
|
|
|
|
return 0;
|
|
out_dev:
|
|
mfd_remove_devices(chip->dev);
|
|
device_irq_exit_800(chip);
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
static int pm800_probe(struct i2c_client *client,
|
|
const struct i2c_device_id *id)
|
|
{
|
|
int ret = 0;
|
|
struct pm80x_chip *chip;
|
|
struct pm80x_platform_data *pdata = dev_get_platdata(&client->dev);
|
|
struct pm80x_subchip *subchip;
|
|
|
|
ret = pm80x_init(client);
|
|
if (ret) {
|
|
dev_err(&client->dev, "pm800_init fail\n");
|
|
goto out_init;
|
|
}
|
|
|
|
chip = i2c_get_clientdata(client);
|
|
|
|
/* init subchip for PM800 */
|
|
subchip =
|
|
devm_kzalloc(&client->dev, sizeof(struct pm80x_subchip),
|
|
GFP_KERNEL);
|
|
if (!subchip) {
|
|
ret = -ENOMEM;
|
|
goto err_subchip_alloc;
|
|
}
|
|
|
|
/* pm800 has 2 addtional pages to support power and gpadc. */
|
|
subchip->power_page_addr = client->addr + 1;
|
|
subchip->gpadc_page_addr = client->addr + 2;
|
|
chip->subchip = subchip;
|
|
|
|
ret = pm800_pages_init(chip);
|
|
if (ret) {
|
|
dev_err(&client->dev, "pm800_pages_init failed!\n");
|
|
goto err_page_init;
|
|
}
|
|
|
|
ret = device_800_init(chip, pdata);
|
|
if (ret) {
|
|
dev_err(chip->dev, "Failed to initialize 88pm800 devices\n");
|
|
goto err_device_init;
|
|
}
|
|
|
|
if (pdata && pdata->plat_config)
|
|
pdata->plat_config(chip, pdata);
|
|
|
|
return 0;
|
|
|
|
err_device_init:
|
|
pm800_pages_exit(chip);
|
|
err_page_init:
|
|
err_subchip_alloc:
|
|
pm80x_deinit();
|
|
out_init:
|
|
return ret;
|
|
}
|
|
|
|
static int pm800_remove(struct i2c_client *client)
|
|
{
|
|
struct pm80x_chip *chip = i2c_get_clientdata(client);
|
|
|
|
mfd_remove_devices(chip->dev);
|
|
device_irq_exit_800(chip);
|
|
|
|
pm800_pages_exit(chip);
|
|
pm80x_deinit();
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct i2c_driver pm800_driver = {
|
|
.driver = {
|
|
.name = "88PM800",
|
|
.owner = THIS_MODULE,
|
|
.pm = &pm80x_pm_ops,
|
|
},
|
|
.probe = pm800_probe,
|
|
.remove = pm800_remove,
|
|
.id_table = pm80x_id_table,
|
|
};
|
|
|
|
static int __init pm800_i2c_init(void)
|
|
{
|
|
return i2c_add_driver(&pm800_driver);
|
|
}
|
|
subsys_initcall(pm800_i2c_init);
|
|
|
|
static void __exit pm800_i2c_exit(void)
|
|
{
|
|
i2c_del_driver(&pm800_driver);
|
|
}
|
|
module_exit(pm800_i2c_exit);
|
|
|
|
MODULE_DESCRIPTION("PMIC Driver for Marvell 88PM800");
|
|
MODULE_AUTHOR("Qiao Zhou <zhouqiao@marvell.com>");
|
|
MODULE_LICENSE("GPL");
|