lkml.org 
[lkml]   [2018]   [Jun]   [12]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 05/19] mmc: mmci: allow to overwrite clock/power procedure to specific variant
Date
From: Ludovic Barre <ludovic.barre@st.com>

A specific variant could have different power or clock procedures.
This patch allows to overwrite the default mmci_set_clkreg and
mmci_set_pwrreg for a specific variant.

Signed-off-by: Ludovic Barre <ludovic.barre@st.com>
---
drivers/mmc/host/mmci.c | 96 +++++++++++++++++++++++++++++--------------------
drivers/mmc/host/mmci.h | 7 ++++
2 files changed, 64 insertions(+), 39 deletions(-)

diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c
index ede95b7..801c86b 100644
--- a/drivers/mmc/host/mmci.c
+++ b/drivers/mmc/host/mmci.c
@@ -374,6 +374,52 @@ static void mmci_set_clkreg(struct mmci_host *host, unsigned int desired)
mmci_write_clkreg(host, clk);
}

+static void mmci_set_pwrreg(struct mmci_host *host, unsigned char power_mode,
+ unsigned int pwr)
+{
+ struct variant_data *variant = host->variant;
+ struct mmc_host *mmc = host->mmc;
+
+ switch (power_mode) {
+ case MMC_POWER_OFF:
+ if (!IS_ERR(mmc->supply.vmmc))
+ mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, 0);
+
+ if (!IS_ERR(mmc->supply.vqmmc) && host->vqmmc_enabled) {
+ regulator_disable(mmc->supply.vqmmc);
+ host->vqmmc_enabled = false;
+ }
+
+ break;
+ case MMC_POWER_UP:
+ if (!IS_ERR(mmc->supply.vmmc))
+ mmc_regulator_set_ocr(mmc, mmc->supply.vmmc,
+ mmc->ios.vdd);
+
+ /*
+ * The ST Micro variant doesn't have the PL180s MCI_PWR_UP
+ * and instead uses MCI_PWR_ON so apply whatever value is
+ * configured in the variant data.
+ */
+ pwr |= variant->pwrreg_powerup;
+
+ break;
+ case MMC_POWER_ON:
+ if (!IS_ERR(mmc->supply.vqmmc) && !host->vqmmc_enabled) {
+ if (regulator_enable(mmc->supply.vqmmc) < 0)
+ dev_err(mmc_dev(mmc),
+ "failed to enable vqmmc regulator\n");
+ else
+ host->vqmmc_enabled = true;
+ }
+
+ pwr |= MCI_PWR_ON;
+ break;
+ }
+
+ mmci_write_pwrreg(host, pwr);
+}
+
static void
mmci_request_end(struct mmci_host *host, struct mmc_request *mrq)
{
@@ -1031,7 +1077,7 @@ static void mmci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
{
struct mmci_host *host = mmc_priv(mmc);
struct variant_data *variant = host->variant;
- u32 pwr = 0;
+ unsigned int pwr = 0;
unsigned long flags;
int ret;

@@ -1039,42 +1085,6 @@ static void mmci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
host->plat->ios_handler(mmc_dev(mmc), ios))
dev_err(mmc_dev(mmc), "platform ios_handler failed\n");

- switch (ios->power_mode) {
- case MMC_POWER_OFF:
- if (!IS_ERR(mmc->supply.vmmc))
- mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, 0);
-
- if (!IS_ERR(mmc->supply.vqmmc) && host->vqmmc_enabled) {
- regulator_disable(mmc->supply.vqmmc);
- host->vqmmc_enabled = false;
- }
-
- break;
- case MMC_POWER_UP:
- if (!IS_ERR(mmc->supply.vmmc))
- mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, ios->vdd);
-
- /*
- * The ST Micro variant doesn't have the PL180s MCI_PWR_UP
- * and instead uses MCI_PWR_ON so apply whatever value is
- * configured in the variant data.
- */
- pwr |= variant->pwrreg_powerup;
-
- break;
- case MMC_POWER_ON:
- if (!IS_ERR(mmc->supply.vqmmc) && !host->vqmmc_enabled) {
- ret = regulator_enable(mmc->supply.vqmmc);
- if (ret < 0)
- dev_err(mmc_dev(mmc),
- "failed to enable vqmmc regulator\n");
- else
- host->vqmmc_enabled = true;
- }
-
- pwr |= MCI_PWR_ON;
- break;
- }

if (variant->signal_direction && ios->power_mode != MMC_POWER_OFF) {
/*
@@ -1126,8 +1136,16 @@ static void mmci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)

spin_lock_irqsave(&host->lock, flags);

- mmci_set_clkreg(host, ios->clock);
- mmci_write_pwrreg(host, pwr);
+ if (variant->set_clkreg)
+ variant->set_clkreg(host, ios->clock);
+ else
+ mmci_set_clkreg(host, ios->clock);
+
+ if (variant->set_pwrreg)
+ variant->set_pwrreg(host, ios->power_mode, pwr);
+ else
+ mmci_set_pwrreg(host, ios->power_mode, pwr);
+
mmci_reg_delay(host);

spin_unlock_irqrestore(&host->lock, flags);
diff --git a/drivers/mmc/host/mmci.h b/drivers/mmc/host/mmci.h
index 2ba9640..7265ca6 100644
--- a/drivers/mmc/host/mmci.h
+++ b/drivers/mmc/host/mmci.h
@@ -231,6 +231,7 @@

struct clk;
struct dma_chan;
+struct mmci_host;

/**
* struct variant_data - MMCI variant-specific quirks
@@ -273,6 +274,8 @@ struct dma_chan;
* register.
* @opendrain: bitmask identifying the OPENDRAIN bit inside MMCIPOWER register
* @mmci_dma: Pointer to platform-specific DMA callbacks.
+ * @set_clk_ios: if clock procedure of variant is specific
+ * @set_pwr_ios: if power procedure of variant is specific
*/
struct variant_data {
unsigned int clkreg;
@@ -307,6 +310,9 @@ struct variant_data {
u32 start_err;
u32 opendrain;
struct mmci_dma_ops *mmci_dma;
+ void (*set_clkreg)(struct mmci_host *host, unsigned int desired);
+ void (*set_pwrreg)(struct mmci_host *host, unsigned char power_mode,
+ unsigned int pwr);
};

struct mmci_host {
@@ -328,6 +334,7 @@ struct mmci_host {
u32 pwr_reg;
u32 pwr_reg_add;
u32 clk_reg;
+ u32 clk_reg_add;
u32 datactrl_reg;
u32 busy_status;
u32 mask1_reg;
--
2.7.4
\
 
 \ /
  Last update: 2018-06-12 15:20    [W:0.060 / U:0.028 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site