Merge tag 'mfd-for-linus-3.17' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd

Pull MFD update from Lee Jones:
 "Changes to existing drivers:
   - checkpatch fixes throughout the subsystem
   - use Regmap to handle IRQs in max77686, extcon-max77693 and
     mc13xxx-core
   - use DMA in rtsx_pcr
   - restrict building on unsupported architectures on timberdale,
     cs5535
   - SPI hardening in cros_ec_spi
   - more robust error handing in asic3, cros_ec, ab8500-debugfs,
     max77686 and pcf50633-core
   - reorder PM runtime and regulator handing during shutdown in arizona
   - enable wakeup in cros_ec_spi
   - unused variable/code clean-up in pm8921-core, cros_ec, htc-i2cpld,
     tps65912-spi, wm5110-tables and ab8500-debugfs
   - add regulator handing into suspend() in sec-core
   - remove pointless wrapper functions in extcon-max77693 and
     i2c-cros-ec-tunnel
   - use cross-architecture friendly data sizes in stmpe-i2c, arizona,
     max77686 and tps65910
   - devicetree documentation updates throughout
   - provide power management support in max77686
   - few OF clean-ups in max77686
   - use manged resources in tps6105x

  New drivers/supported devices:
   - add support for s2mpu02 to sec-core
   - add support for Allwinner A32 to sun6i-prcm
   - add support for Maxim 77802 in max77686
   - add support for DA9063 AD in da9063
   - new driver for Intel PMICs (generic) and specifically Crystal Cove

  (Re-)moved drivers ==
   - move out keyboard functionality cros_ec ==> input/keyboard/cros_ec_keyb"

* tag 'mfd-for-linus-3.17' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd: (101 commits)
  MAINTAINERS: Update MFD repo location
  mfd: omap-usb-host: Fix improper mask use.
  mfd: arizona: Only free the CTRLIF_ERR IRQ if we requested it
  mfd: arizona: Add missing handling for ISRC3 under/overclocked
  mfd: wm5110: Add new interrupt register definitions
  mfd: arizona: Rename thermal shutdown interrupt
  mfd: wm5110: Add in the output done interrupts
  mfd: wm5110: Remove non-existant interrupts
  mfd: tps65912-spi: Remove unused variable
  mfd: htc-i2cpld: Remove unused code
  mfd: da9063: Add support for AD silicon variant
  mfd: arizona: Map MICVDD from extcon device to the Arizona core
  mfd: arizona: Add MICVDD to mapped regulators for wm8997
  mfd: max77686: Ensure device type IDs are architecture agnostic
  mfd: max77686: Add Maxim 77802 PMIC support
  mfd: tps6105x: Use managed resources when allocating memory
  mfd: wm8997-tables: Suppress 'line over 80 chars' warnings
  mfd: kempld-core: Correct a variety of checkpatch warnings
  mfd: ipaq-micro: Fix coding style errors/warnings reported by checkpatch
  mfd: si476x-cmd: Remedy checkpatch style complains
  ...

1 files changed, 127 insertions, 6 deletions

diff --git a/drivers/mmc/host/rtsx_pci_sdmmc.c b/drivers/mmc/host/rtsx_pci_sdmmc.c
index 0d519649b575..dfde4a210238 100644
--- a/drivers/mmc/host/rtsx_pci_sdmmc.c
+++ b/drivers/mmc/host/rtsx_pci_sdmmc.c
@@ -24,6 +24,7 @@
 #include <linux/highmem.h>
 #include <linux/delay.h>
 #include <linux/platform_device.h>
+#include <linux/workqueue.h>
 #include <linux/mmc/host.h>
 #include <linux/mmc/mmc.h>
 #include <linux/mmc/sd.h>
@@ -36,7 +37,10 @@ struct realtek_pci_sdmmc {
 	struct rtsx_pcr		*pcr;
 	struct mmc_host		*mmc;
 	struct mmc_request	*mrq;
+	struct workqueue_struct *workq;
+#define SDMMC_WORKQ_NAME	"rtsx_pci_sdmmc_workq"
 
+	struct work_struct	work;
 	struct mutex		host_mutex;
 
 	u8			ssc_depth;
@@ -48,6 +52,11 @@ struct realtek_pci_sdmmc {
 	int			power_state;
 #define SDMMC_POWER_ON		1
 #define SDMMC_POWER_OFF		0
+
+	unsigned int		sg_count;
+	s32			cookie;
+	unsigned int		cookie_sg_count;
+	bool			using_cookie;
 };
 
 static inline struct device *sdmmc_dev(struct realtek_pci_sdmmc *host)
@@ -86,6 +95,77 @@ static void sd_print_debug_regs(struct realtek_pci_sdmmc *host)
 #define sd_print_debug_regs(host)
 #endif /* DEBUG */
 
+/*
+ * sd_pre_dma_transfer - do dma_map_sg() or using cookie
+ *
+ * @pre: if called in pre_req()
+ * return:
+ *	0 - do dma_map_sg()
+ *	1 - using cookie
+ */
+static int sd_pre_dma_transfer(struct realtek_pci_sdmmc *host,
+		struct mmc_data *data, bool pre)
+{
+	struct rtsx_pcr *pcr = host->pcr;
+	int read = data->flags & MMC_DATA_READ;
+	int count = 0;
+	int using_cookie = 0;
+
+	if (!pre && data->host_cookie && data->host_cookie != host->cookie) {
+		dev_err(sdmmc_dev(host),
+			"error: data->host_cookie = %d, host->cookie = %d\n",
+			data->host_cookie, host->cookie);
+		data->host_cookie = 0;
+	}
+
+	if (pre || data->host_cookie != host->cookie) {
+		count = rtsx_pci_dma_map_sg(pcr, data->sg, data->sg_len, read);
+	} else {
+		count = host->cookie_sg_count;
+		using_cookie = 1;
+	}
+
+	if (pre) {
+		host->cookie_sg_count = count;
+		if (++host->cookie < 0)
+			host->cookie = 1;
+		data->host_cookie = host->cookie;
+	} else {
+		host->sg_count = count;
+	}
+
+	return using_cookie;
+}
+
+static void sdmmc_pre_req(struct mmc_host *mmc, struct mmc_request *mrq,
+		bool is_first_req)
+{
+	struct realtek_pci_sdmmc *host = mmc_priv(mmc);
+	struct mmc_data *data = mrq->data;
+
+	if (data->host_cookie) {
+		dev_err(sdmmc_dev(host),
+			"error: reset data->host_cookie = %d\n",
+			data->host_cookie);
+		data->host_cookie = 0;
+	}
+
+	sd_pre_dma_transfer(host, data, true);
+	dev_dbg(sdmmc_dev(host), "pre dma sg: %d\n", host->cookie_sg_count);
+}
+
+static void sdmmc_post_req(struct mmc_host *mmc, struct mmc_request *mrq,
+		int err)
+{
+	struct realtek_pci_sdmmc *host = mmc_priv(mmc);
+	struct rtsx_pcr *pcr = host->pcr;
+	struct mmc_data *data = mrq->data;
+	int read = data->flags & MMC_DATA_READ;
+
+	rtsx_pci_dma_unmap_sg(pcr, data->sg, data->sg_len, read);
+	data->host_cookie = 0;
+}
+
 static int sd_read_data(struct realtek_pci_sdmmc *host, u8 *cmd, u16 byte_cnt,
 		u8 *buf, int buf_len, int timeout)
 {
@@ -415,7 +495,7 @@ static int sd_rw_multi(struct realtek_pci_sdmmc *host, struct mmc_request *mrq)
 
 	rtsx_pci_send_cmd_no_wait(pcr);
 
-	err = rtsx_pci_transfer_data(pcr, data->sg, data->sg_len, read, 10000);
+	err = rtsx_pci_dma_transfer(pcr, data->sg, host->sg_count, read, 10000);
 	if (err < 0) {
 		sd_clear_error(host);
 		return err;
@@ -640,12 +720,24 @@ static int sd_tuning_rx(struct realtek_pci_sdmmc *host, u8 opcode)
 	return 0;
 }
 
-static void sdmmc_request(struct mmc_host *mmc, struct mmc_request *mrq)
+static inline int sd_rw_cmd(struct mmc_command *cmd)
 {
-	struct realtek_pci_sdmmc *host = mmc_priv(mmc);
+	return mmc_op_multi(cmd->opcode) ||
+		(cmd->opcode == MMC_READ_SINGLE_BLOCK) ||
+		(cmd->opcode == MMC_WRITE_BLOCK);
+}
+
+static void sd_request(struct work_struct *work)
+{
+	struct realtek_pci_sdmmc *host = container_of(work,
+			struct realtek_pci_sdmmc, work);
 	struct rtsx_pcr *pcr = host->pcr;
+
+	struct mmc_host *mmc = host->mmc;
+	struct mmc_request *mrq = host->mrq;
 	struct mmc_command *cmd = mrq->cmd;
 	struct mmc_data *data = mrq->data;
+
 	unsigned int data_size = 0;
 	int err;
 
@@ -677,13 +769,13 @@ static void sdmmc_request(struct mmc_host *mmc, struct mmc_request *mrq)
 	if (mrq->data)
 		data_size = data->blocks * data->blksz;
 
-	if (!data_size || mmc_op_multi(cmd->opcode) ||
-			(cmd->opcode == MMC_READ_SINGLE_BLOCK) ||
-			(cmd->opcode == MMC_WRITE_BLOCK)) {
+	if (!data_size || sd_rw_cmd(cmd)) {
 		sd_send_cmd_get_rsp(host, cmd);
 
 		if (!cmd->error && data_size) {
 			sd_rw_multi(host, mrq);
+			if (!host->using_cookie)
+				sdmmc_post_req(host->mmc, host->mrq, 0);
 
 			if (mmc_op_multi(cmd->opcode) && mrq->stop)
 				sd_send_cmd_get_rsp(host, mrq->stop);
@@ -712,6 +804,21 @@ finish:
 	mmc_request_done(mmc, mrq);
 }
 
+static void sdmmc_request(struct mmc_host *mmc, struct mmc_request *mrq)
+{
+	struct realtek_pci_sdmmc *host = mmc_priv(mmc);
+	struct mmc_data *data = mrq->data;
+
+	mutex_lock(&host->host_mutex);
+	host->mrq = mrq;
+	mutex_unlock(&host->host_mutex);
+
+	if (sd_rw_cmd(mrq->cmd))
+		host->using_cookie = sd_pre_dma_transfer(host, data, false);
+
+	queue_work(host->workq, &host->work);
+}
+
 static int sd_set_bus_width(struct realtek_pci_sdmmc *host,
 		unsigned char bus_width)
 {
@@ -1146,6 +1253,8 @@ out:
 }
 
 static const struct mmc_host_ops realtek_pci_sdmmc_ops = {
+	.pre_req = sdmmc_pre_req,
+	.post_req = sdmmc_post_req,
 	.request = sdmmc_request,
 	.set_ios = sdmmc_set_ios,
 	.get_ro = sdmmc_get_ro,
@@ -1224,10 +1333,16 @@ static int rtsx_pci_sdmmc_drv_probe(struct platform_device *pdev)
 		return -ENOMEM;
 
 	host = mmc_priv(mmc);
+	host->workq = create_singlethread_workqueue(SDMMC_WORKQ_NAME);
+	if (!host->workq) {
+		mmc_free_host(mmc);
+		return -ENOMEM;
+	}
 	host->pcr = pcr;
 	host->mmc = mmc;
 	host->pdev = pdev;
 	host->power_state = SDMMC_POWER_OFF;
+	INIT_WORK(&host->work, sd_request);
 	platform_set_drvdata(pdev, host);
 	pcr->slots[RTSX_SD_CARD].p_dev = pdev;
 	pcr->slots[RTSX_SD_CARD].card_event = rtsx_pci_sdmmc_card_event;
@@ -1255,6 +1370,8 @@ static int rtsx_pci_sdmmc_drv_remove(struct platform_device *pdev)
 	pcr->slots[RTSX_SD_CARD].card_event = NULL;
 	mmc = host->mmc;
 
+	cancel_work_sync(&host->work);
+
 	mutex_lock(&host->host_mutex);
 	if (host->mrq) {
 		dev_dbg(&(pdev->dev),
@@ -1273,6 +1390,10 @@ static int rtsx_pci_sdmmc_drv_remove(struct platform_device *pdev)
 	mmc_remove_host(mmc);
 	host->eject = true;
 
+	flush_workqueue(host->workq);
+	destroy_workqueue(host->workq);
+	host->workq = NULL;
+
 	mmc_free_host(mmc);
 
 	dev_dbg(&(pdev->dev),