diff options
author | Ritesh Harjani <riteshh@codeaurora.org> | 2016-11-21 12:07:13 +0530 |
---|---|---|
committer | Ulf Hansson <ulf.hansson@linaro.org> | 2016-11-29 09:05:12 +0100 |
commit | 29301f40cb9f8e91352ad2e8a7cef5a3d35b9925 (patch) | |
tree | a8efb9e3a52e27f81e3ab9baec571736242b4d94 /drivers/mmc/host/sdhci-msm.c | |
parent | 53e391aba608828927e6a1236d2c7ec132f917f0 (diff) | |
download | linux-29301f40cb9f8e91352ad2e8a7cef5a3d35b9925.tar.bz2 |
mmc: sdhci-msm: Change poor style writel/readl of registers
This patch changes the poor style of writel/readl registers
into more readable format. This avoid mixed style format
of readl/writel in sdhci-msm driver.
This patch also removes the one line comments which were present for
above writel/readl, since they were of no help.
Signed-off-by: Ritesh Harjani <riteshh@codeaurora.org>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/mmc/host/sdhci-msm.c')
-rw-r--r-- | drivers/mmc/host/sdhci-msm.c | 62 |
1 files changed, 32 insertions, 30 deletions
diff --git a/drivers/mmc/host/sdhci-msm.c b/drivers/mmc/host/sdhci-msm.c index b78d72f28864..2dcbeb0c31c6 100644 --- a/drivers/mmc/host/sdhci-msm.c +++ b/drivers/mmc/host/sdhci-msm.c @@ -138,9 +138,9 @@ static int msm_config_cm_dll_phase(struct sdhci_host *host, u8 phase) config |= grey_coded_phase_table[phase] << CDR_SELEXT_SHIFT; writel_relaxed(config, host->ioaddr + CORE_DLL_CONFIG); - /* Set CK_OUT_EN bit of DLL_CONFIG register to 1. */ - writel_relaxed((readl_relaxed(host->ioaddr + CORE_DLL_CONFIG) - | CORE_CK_OUT_EN), host->ioaddr + CORE_DLL_CONFIG); + config = readl_relaxed(host->ioaddr + CORE_DLL_CONFIG); + config |= CORE_CK_OUT_EN; + writel_relaxed(config, host->ioaddr + CORE_DLL_CONFIG); /* Wait until CK_OUT_EN bit of DLL_CONFIG register becomes '1' */ rc = msm_dll_poll_ck_out_en(host, 1); @@ -307,6 +307,7 @@ static int msm_init_cm_dll(struct sdhci_host *host) struct mmc_host *mmc = host->mmc; int wait_cnt = 50; unsigned long flags; + u32 config; spin_lock_irqsave(&host->lock, flags); @@ -315,33 +316,34 @@ static int msm_init_cm_dll(struct sdhci_host *host) * tuning is in progress. Keeping PWRSAVE ON may * turn off the clock. */ - writel_relaxed((readl_relaxed(host->ioaddr + CORE_VENDOR_SPEC) - & ~CORE_CLK_PWRSAVE), host->ioaddr + CORE_VENDOR_SPEC); + config = readl_relaxed(host->ioaddr + CORE_VENDOR_SPEC); + config &= ~CORE_CLK_PWRSAVE; + writel_relaxed(config, host->ioaddr + CORE_VENDOR_SPEC); - /* Write 1 to DLL_RST bit of DLL_CONFIG register */ - writel_relaxed((readl_relaxed(host->ioaddr + CORE_DLL_CONFIG) - | CORE_DLL_RST), host->ioaddr + CORE_DLL_CONFIG); + config = readl_relaxed(host->ioaddr + CORE_DLL_CONFIG); + config |= CORE_DLL_RST; + writel_relaxed(config, host->ioaddr + CORE_DLL_CONFIG); - /* Write 1 to DLL_PDN bit of DLL_CONFIG register */ - writel_relaxed((readl_relaxed(host->ioaddr + CORE_DLL_CONFIG) - | CORE_DLL_PDN), host->ioaddr + CORE_DLL_CONFIG); + config = readl_relaxed(host->ioaddr + CORE_DLL_CONFIG); + config |= CORE_DLL_PDN; + writel_relaxed(config, host->ioaddr + CORE_DLL_CONFIG); msm_cm_dll_set_freq(host); - /* Write 0 to DLL_RST bit of DLL_CONFIG register */ - writel_relaxed((readl_relaxed(host->ioaddr + CORE_DLL_CONFIG) - & ~CORE_DLL_RST), host->ioaddr + CORE_DLL_CONFIG); + config = readl_relaxed(host->ioaddr + CORE_DLL_CONFIG); + config &= ~CORE_DLL_RST; + writel_relaxed(config, host->ioaddr + CORE_DLL_CONFIG); - /* Write 0 to DLL_PDN bit of DLL_CONFIG register */ - writel_relaxed((readl_relaxed(host->ioaddr + CORE_DLL_CONFIG) - & ~CORE_DLL_PDN), host->ioaddr + CORE_DLL_CONFIG); + config = readl_relaxed(host->ioaddr + CORE_DLL_CONFIG); + config &= ~CORE_DLL_PDN; + writel_relaxed(config, host->ioaddr + CORE_DLL_CONFIG); - /* Set DLL_EN bit to 1. */ - writel_relaxed((readl_relaxed(host->ioaddr + CORE_DLL_CONFIG) - | CORE_DLL_EN), host->ioaddr + CORE_DLL_CONFIG); + config = readl_relaxed(host->ioaddr + CORE_DLL_CONFIG); + config |= CORE_DLL_EN; + writel_relaxed(config, host->ioaddr + CORE_DLL_CONFIG); - /* Set CK_OUT_EN bit to 1. */ - writel_relaxed((readl_relaxed(host->ioaddr + CORE_DLL_CONFIG) - | CORE_CK_OUT_EN), host->ioaddr + CORE_DLL_CONFIG); + config = readl_relaxed(host->ioaddr + CORE_DLL_CONFIG); + config |= CORE_CK_OUT_EN; + writel_relaxed(config, host->ioaddr + CORE_DLL_CONFIG); /* Wait until DLL_LOCK bit of DLL_STATUS register becomes '1' */ while (!(readl_relaxed(host->ioaddr + CORE_DLL_STATUS) & @@ -538,7 +540,7 @@ static int sdhci_msm_probe(struct platform_device *pdev) struct resource *core_memres; int ret; u16 host_version, core_minor; - u32 core_version, caps; + u32 core_version, config; u8 core_major; host = sdhci_pltfm_init(pdev, &sdhci_msm_pdata, sizeof(*msm_host)); @@ -606,9 +608,9 @@ static int sdhci_msm_probe(struct platform_device *pdev) goto clk_disable; } - /* Reset the core and Enable SDHC mode */ - writel_relaxed(readl_relaxed(msm_host->core_mem + CORE_POWER) | - CORE_SW_RST, msm_host->core_mem + CORE_POWER); + config = readl_relaxed(msm_host->core_mem + CORE_POWER); + config |= CORE_SW_RST; + writel_relaxed(config, msm_host->core_mem + CORE_POWER); /* SW reset can take upto 10HCLK + 15MCLK cycles. (min 40us) */ usleep_range(1000, 5000); @@ -638,9 +640,9 @@ static int sdhci_msm_probe(struct platform_device *pdev) * controller versions and must be explicitly enabled. */ if (core_major >= 1 && core_minor != 0x11 && core_minor != 0x12) { - caps = readl_relaxed(host->ioaddr + SDHCI_CAPABILITIES); - caps |= SDHCI_CAN_VDD_300 | SDHCI_CAN_DO_8BIT; - writel_relaxed(caps, host->ioaddr + + config = readl_relaxed(host->ioaddr + SDHCI_CAPABILITIES); + config |= SDHCI_CAN_VDD_300 | SDHCI_CAN_DO_8BIT; + writel_relaxed(config, host->ioaddr + CORE_VENDOR_SPEC_CAPABILITIES0); } |