In the initial submission of the MSP driver msp1 and msp3's associated pinctrl mechanism was passed back to platform code using a plat_init() call-back routine, but it has no place in platform code. The MSP driver should set this up for the appropriate ports. Instead we use a use_pinctrl identifier which is passed from platform_data/Device Tree which indicates which ports should use pinctrl.
Signed-off-by: Lee Jones lee.jones@linaro.org --- arch/arm/mach-ux500/board-mop500-msp.c | 77 ++---------------------------- arch/arm/mach-ux500/include/mach/msp.h | 3 +- sound/soc/ux500/ux500_msp_i2s.c | 81 +++++++++++++++++++++++++------- sound/soc/ux500/ux500_msp_i2s.h | 3 +- 4 files changed, 70 insertions(+), 94 deletions(-)
diff --git a/arch/arm/mach-ux500/board-mop500-msp.c b/arch/arm/mach-ux500/board-mop500-msp.c index 1b6a193..a740e8a 100644 --- a/arch/arm/mach-ux500/board-mop500-msp.c +++ b/arch/arm/mach-ux500/board-mop500-msp.c @@ -23,53 +23,6 @@ #include "devices-db8500.h" #include "pins-db8500.h"
-/* MSP1/3 Tx/Rx usage protection */ -static DEFINE_SPINLOCK(msp_rxtx_lock); - -/* Reference Count */ -static int msp_rxtx_ref; - -/* Pin modes */ -struct pinctrl *msp1_p; -struct pinctrl_state *msp1_def; -struct pinctrl_state *msp1_sleep; - -int msp13_i2s_init(void) -{ - int retval = 0; - unsigned long flags; - - spin_lock_irqsave(&msp_rxtx_lock, flags); - if (msp_rxtx_ref == 0 && !(IS_ERR(msp1_p) || IS_ERR(msp1_def))) { - retval = pinctrl_select_state(msp1_p, msp1_def); - if (retval) - pr_err("could not set MSP1 defstate\n"); - } - if (!retval) - msp_rxtx_ref++; - spin_unlock_irqrestore(&msp_rxtx_lock, flags); - - return retval; -} - -int msp13_i2s_exit(void) -{ - int retval = 0; - unsigned long flags; - - spin_lock_irqsave(&msp_rxtx_lock, flags); - WARN_ON(!msp_rxtx_ref); - msp_rxtx_ref--; - if (msp_rxtx_ref == 0 && !(IS_ERR(msp1_p) || IS_ERR(msp1_sleep))) { - retval = pinctrl_select_state(msp1_p, msp1_sleep); - if (retval) - pr_err("could not set MSP1 sleepstate\n"); - } - spin_unlock_irqrestore(&msp_rxtx_lock, flags); - - return retval; -} - static struct stedma40_chan_cfg msp0_dma_rx = { .high_priority = true, .dir = STEDMA40_PERIPH_TO_MEM, @@ -132,8 +85,7 @@ static struct msp_i2s_platform_data msp1_platform_data = { .id = MSP_I2S_1, .msp_i2s_dma_rx = NULL, .msp_i2s_dma_tx = &msp1_dma_tx, - .msp_i2s_init = msp13_i2s_init, - .msp_i2s_exit = msp13_i2s_exit, + .use_pinctrl = true, };
static struct stedma40_chan_cfg msp2_dma_rx = { @@ -219,47 +171,24 @@ static struct msp_i2s_platform_data msp3_platform_data = { .id = MSP_I2S_3, .msp_i2s_dma_rx = &msp1_dma_rx, .msp_i2s_dma_tx = NULL, - .msp_i2s_init = msp13_i2s_init, - .msp_i2s_exit = msp13_i2s_exit, + .use_pinctrl = true, };
int mop500_msp_init(struct device *parent) { - struct platform_device *msp1; - pr_info("%s: Register platform-device 'snd-soc-u8500'.\n", __func__); platform_device_register(&snd_soc_mop500);
pr_info("Initialize MSP I2S-devices.\n"); db8500_add_msp_i2s(parent, 0, U8500_MSP0_BASE, IRQ_DB8500_MSP0, &msp0_platform_data); - msp1 = db8500_add_msp_i2s(parent, 1, U8500_MSP1_BASE, IRQ_DB8500_MSP1, + db8500_add_msp_i2s(parent, 1, U8500_MSP1_BASE, IRQ_DB8500_MSP1, &msp1_platform_data); db8500_add_msp_i2s(parent, 2, U8500_MSP2_BASE, IRQ_DB8500_MSP2, &msp2_platform_data); db8500_add_msp_i2s(parent, 3, U8500_MSP3_BASE, IRQ_DB8500_MSP1, &msp3_platform_data);
- /* Get the pinctrl handle for MSP1 */ - if (msp1) { - msp1_p = pinctrl_get(&msp1->dev); - if (IS_ERR(msp1_p)) - dev_err(&msp1->dev, "could not get MSP1 pinctrl\n"); - else { - msp1_def = pinctrl_lookup_state(msp1_p, - PINCTRL_STATE_DEFAULT); - if (IS_ERR(msp1_def)) { - dev_err(&msp1->dev, - "could not get MSP1 defstate\n"); - } - msp1_sleep = pinctrl_lookup_state(msp1_p, - PINCTRL_STATE_SLEEP); - if (IS_ERR(msp1_sleep)) - dev_err(&msp1->dev, - "could not get MSP1 idlestate\n"); - } - } - pr_info("%s: Register platform-device 'ux500-pcm'\n", __func__); platform_device_register(&ux500_pcm);
diff --git a/arch/arm/mach-ux500/include/mach/msp.h b/arch/arm/mach-ux500/include/mach/msp.h index 798be19..95b7deb 100644 --- a/arch/arm/mach-ux500/include/mach/msp.h +++ b/arch/arm/mach-ux500/include/mach/msp.h @@ -22,8 +22,7 @@ struct msp_i2s_platform_data { enum msp_i2s_id id; struct stedma40_chan_cfg *msp_i2s_dma_rx; struct stedma40_chan_cfg *msp_i2s_dma_tx; - int (*msp_i2s_init) (void); - int (*msp_i2s_exit) (void); + bool use_pinctrl; };
#endif diff --git a/sound/soc/ux500/ux500_msp_i2s.c b/sound/soc/ux500/ux500_msp_i2s.c index 36be11e..72ad6e8 100644 --- a/sound/soc/ux500/ux500_msp_i2s.c +++ b/sound/soc/ux500/ux500_msp_i2s.c @@ -15,6 +15,7 @@
#include <linux/module.h> #include <linux/platform_device.h> +#include <linux/pinctrl/consumer.h> #include <linux/delay.h> #include <linux/slab.h>
@@ -25,6 +26,17 @@
#include "ux500_msp_i2s.h"
+/* MSP1/3 Tx/Rx usage protection */ +static DEFINE_SPINLOCK(msp_rxtx_lock); + +/* Pin modes */ +struct pinctrl *pinctrl_p; +struct pinctrl_state *pinctrl_def; +struct pinctrl_state *pinctrl_sleep; + +/* Reference Count */ +int pinctrl_rxtx_ref; + /* Protocol desciptors */ static const struct msp_protdesc prot_descs[] = { { /* I2S */ @@ -352,17 +364,23 @@ static int configure_multichannel(struct ux500_msp *msp,
static int enable_msp(struct ux500_msp *msp, struct ux500_msp_config *config) { - int status = 0; + int status = 0, retval = 0; u32 reg_val_DMACR, reg_val_GCR; + unsigned long flags;
/* Check msp state whether in RUN or CONFIGURED Mode */ - if ((msp->msp_state == MSP_STATE_IDLE) && (msp->plat_init)) { - status = msp->plat_init(); - if (status) { - dev_err(msp->dev, "%s: ERROR: Failed to init MSP (%d)!\n", - __func__, status); - return status; + if (msp->msp_state == MSP_STATE_IDLE && msp->use_pinctrl) { + spin_lock_irqsave(&msp_rxtx_lock, flags); + if (pinctrl_rxtx_ref == 0 && + !(IS_ERR(pinctrl_p) || IS_ERR(pinctrl_def))) { + retval = pinctrl_select_state(pinctrl_p, + pinctrl_def); + if (retval) + pr_err("could not set MSP defstate\n"); } + if (!retval) + pinctrl_rxtx_ref++; + spin_unlock_irqrestore(&msp_rxtx_lock, flags); }
/* Configure msp with protocol dependent settings */ @@ -620,7 +638,8 @@ int ux500_msp_i2s_trigger(struct ux500_msp *msp, int cmd, int direction)
int ux500_msp_i2s_close(struct ux500_msp *msp, unsigned int dir) { - int status = 0; + int status = 0, retval = 0; + unsigned long flags;
dev_dbg(msp->dev, "%s: Enter (dir = 0x%01x).\n", __func__, dir);
@@ -631,12 +650,19 @@ int ux500_msp_i2s_close(struct ux500_msp *msp, unsigned int dir) writel((readl(msp->registers + MSP_GCR) & (~(FRAME_GEN_ENABLE | SRG_ENABLE))), msp->registers + MSP_GCR); - if (msp->plat_exit) - status = msp->plat_exit(); - if (status) - dev_warn(msp->dev, - "%s: WARN: ux500_msp_i2s_exit failed (%d)!\n", - __func__, status); + + spin_lock_irqsave(&msp_rxtx_lock, flags); + WARN_ON(!pinctrl_rxtx_ref); + pinctrl_rxtx_ref--; + if (msp->use_pinctrl && pinctrl_rxtx_ref == 0 && + !(IS_ERR(pinctrl_p) || IS_ERR(pinctrl_sleep))) { + retval = pinctrl_select_state(pinctrl_p, + pinctrl_sleep); + if (retval) + pr_err("could not set MSP sleepstate\n"); + } + spin_unlock_irqrestore(&msp_rxtx_lock, flags); + writel(0, msp->registers + MSP_GCR); writel(0, msp->registers + MSP_TCF); writel(0, msp->registers + MSP_RCF); @@ -667,6 +693,7 @@ int ux500_msp_i2s_init_msp(struct platform_device *pdev, struct resource *res = NULL; struct i2s_controller *i2s_cont; struct ux500_msp *msp; + static int initialised = false;
dev_dbg(&pdev->dev, "%s: Enter (name: %s, id: %d).\n", __func__, pdev->name, platform_data->id); @@ -678,8 +705,7 @@ int ux500_msp_i2s_init_msp(struct platform_device *pdev,
msp->id = platform_data->id; msp->dev = &pdev->dev; - msp->plat_init = platform_data->msp_i2s_init; - msp->plat_exit = platform_data->msp_i2s_exit; + msp->use_pinctrl = platform_data->use_pinctrl; msp->dma_cfg_rx = platform_data->msp_i2s_dma_rx; msp->dma_cfg_tx = platform_data->msp_i2s_dma_tx;
@@ -717,6 +743,29 @@ int ux500_msp_i2s_init_msp(struct platform_device *pdev, dev_dbg(&pdev->dev, "I2S device-name: '%s'\n", i2s_cont->name); msp->i2s_cont = i2s_cont;
+ /* MSP1 and MSP3 share pins, so we only need to initialise pinctrl once. */ + if (msp->use_pinctrl && !initialised) { + pinctrl_p = pinctrl_get(msp->dev); + if (IS_ERR(pinctrl_p)) + dev_err(&pdev->dev, "could not get MSP pinctrl\n"); + else { + pinctrl_def = pinctrl_lookup_state(pinctrl_p, + PINCTRL_STATE_DEFAULT); + if (IS_ERR(pinctrl_def)) { + dev_err(&pdev->dev, + "could not get MSP defstate (%li)\n", + PTR_ERR(pinctrl_def)); + } + pinctrl_sleep = pinctrl_lookup_state(pinctrl_p, + PINCTRL_STATE_SLEEP); + if (IS_ERR(pinctrl_sleep)) + dev_err(&pdev->dev, + "could not get MSP idlestate (%li)\n", + PTR_ERR(pinctrl_def)); + } + initialised = true; + } + return 0;
err_i2s_cont: diff --git a/sound/soc/ux500/ux500_msp_i2s.h b/sound/soc/ux500/ux500_msp_i2s.h index 2d9136d..aec02b5 100644 --- a/sound/soc/ux500/ux500_msp_i2s.h +++ b/sound/soc/ux500/ux500_msp_i2s.h @@ -524,14 +524,13 @@ struct ux500_msp { struct dma_chan *rx_pipeid; enum msp_state msp_state; int (*transfer) (struct ux500_msp *msp, struct i2s_message *message); - int (*plat_init) (void); - int (*plat_exit) (void); struct timer_list notify_timer; int def_elem_len; unsigned int dir_busy; int loopback_enable; u32 backup_regs[MAX_MSP_BACKUP_REGS]; unsigned int f_bitclk; + bool use_pinctrl; };
struct ux500_msp_dma_params {