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Message-ID: <CAPDyKFpRsHGkS9hH9c_SGMNNU8ZC-=9Kk8-iVDnKrMUXbACNag@mail.gmail.com>
Date: Mon, 15 May 2017 11:36:46 +0200
From: Ulf Hansson <ulf.hansson@...aro.org>
To: David Woods <dwoods@...lanox.com>
Cc: Jaehoon Chung <jh80.chung@...sung.com>,
Shawn Lin <shawn.lin@...k-chips.com>,
Heiner Kallweit <hkallweit1@...il.com>,
Adrian Hunter <adrian.hunter@...el.com>, cmetcalf@...lanox.com,
"linux-mmc@...r.kernel.org" <linux-mmc@...r.kernel.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] Use device_property_read instead of of_property_read in
the dw_mmc driver
On 25 April 2017 at 17:39, David Woods <dwoods@...lanox.com> wrote:
> Using the device_property interfaces allows the dw_mmc driver to work
> on platforms which run on either device tree or ACPI.
>
> Signed-off-by: David Woods <dwoods@...lanox.com>
> Reviewed-by: Chris Metcalf <cmetcalf@...lanox.com>
> ---
> drivers/mmc/core/host.c | 72 +++++++++++++++++++++++------------------------
> drivers/mmc/host/dw_mmc.c | 24 ++++++++--------
Can you please split this to two separate changes. One for dw_mmc with
a proper prefix (mmc: dw_mmc:) and one for the mmc core (prefix "mmc:
core:").
Kind regards
Uffe
> 2 files changed, 47 insertions(+), 49 deletions(-)
>
> diff --git a/drivers/mmc/core/host.c b/drivers/mmc/core/host.c
> index 3f8c85d..d2c059e 100644
> --- a/drivers/mmc/core/host.c
> +++ b/drivers/mmc/core/host.c
> @@ -176,19 +176,17 @@ static void mmc_retune_timer(unsigned long data)
> */
> int mmc_of_parse(struct mmc_host *host)
> {
> - struct device_node *np;
> + struct device *dev = host->parent;
> u32 bus_width;
> int ret;
> bool cd_cap_invert, cd_gpio_invert = false;
> bool ro_cap_invert, ro_gpio_invert = false;
>
> - if (!host->parent || !host->parent->of_node)
> + if (!dev)
> return 0;
>
> - np = host->parent->of_node;
> -
> /* "bus-width" is translated to MMC_CAP_*_BIT_DATA flags */
> - if (of_property_read_u32(np, "bus-width", &bus_width) < 0) {
> + if (device_property_read_u32(dev, "bus-width", &bus_width) < 0) {
> dev_dbg(host->parent,
> "\"bus-width\" property is missing, assuming 1 bit.\n");
> bus_width = 1;
> @@ -210,7 +208,7 @@ int mmc_of_parse(struct mmc_host *host)
> }
>
> /* f_max is obtained from the optional "max-frequency" property */
> - of_property_read_u32(np, "max-frequency", &host->f_max);
> + device_property_read_u32(dev, "max-frequency", &host->f_max);
>
> /*
> * Configure CD and WP pins. They are both by default active low to
> @@ -225,12 +223,12 @@ int mmc_of_parse(struct mmc_host *host)
> */
>
> /* Parse Card Detection */
> - if (of_property_read_bool(np, "non-removable")) {
> + if (device_property_read_bool(dev, "non-removable")) {
> host->caps |= MMC_CAP_NONREMOVABLE;
> } else {
> - cd_cap_invert = of_property_read_bool(np, "cd-inverted");
> + cd_cap_invert = device_property_read_bool(dev, "cd-inverted");
>
> - if (of_property_read_bool(np, "broken-cd"))
> + if (device_property_read_bool(dev, "broken-cd"))
> host->caps |= MMC_CAP_NEEDS_POLL;
>
> ret = mmc_gpiod_request_cd(host, "cd", 0, true,
> @@ -256,7 +254,7 @@ int mmc_of_parse(struct mmc_host *host)
> }
>
> /* Parse Write Protection */
> - ro_cap_invert = of_property_read_bool(np, "wp-inverted");
> + ro_cap_invert = device_property_read_bool(dev, "wp-inverted");
>
> ret = mmc_gpiod_request_ro(host, "wp", 0, false, 0, &ro_gpio_invert);
> if (!ret)
> @@ -264,64 +262,64 @@ int mmc_of_parse(struct mmc_host *host)
> else if (ret != -ENOENT && ret != -ENOSYS)
> return ret;
>
> - if (of_property_read_bool(np, "disable-wp"))
> + if (device_property_read_bool(dev, "disable-wp"))
> host->caps2 |= MMC_CAP2_NO_WRITE_PROTECT;
>
> /* See the comment on CD inversion above */
> if (ro_cap_invert ^ ro_gpio_invert)
> host->caps2 |= MMC_CAP2_RO_ACTIVE_HIGH;
>
> - if (of_property_read_bool(np, "cap-sd-highspeed"))
> + if (device_property_read_bool(dev, "cap-sd-highspeed"))
> host->caps |= MMC_CAP_SD_HIGHSPEED;
> - if (of_property_read_bool(np, "cap-mmc-highspeed"))
> + if (device_property_read_bool(dev, "cap-mmc-highspeed"))
> host->caps |= MMC_CAP_MMC_HIGHSPEED;
> - if (of_property_read_bool(np, "sd-uhs-sdr12"))
> + if (device_property_read_bool(dev, "sd-uhs-sdr12"))
> host->caps |= MMC_CAP_UHS_SDR12;
> - if (of_property_read_bool(np, "sd-uhs-sdr25"))
> + if (device_property_read_bool(dev, "sd-uhs-sdr25"))
> host->caps |= MMC_CAP_UHS_SDR25;
> - if (of_property_read_bool(np, "sd-uhs-sdr50"))
> + if (device_property_read_bool(dev, "sd-uhs-sdr50"))
> host->caps |= MMC_CAP_UHS_SDR50;
> - if (of_property_read_bool(np, "sd-uhs-sdr104"))
> + if (device_property_read_bool(dev, "sd-uhs-sdr104"))
> host->caps |= MMC_CAP_UHS_SDR104;
> - if (of_property_read_bool(np, "sd-uhs-ddr50"))
> + if (device_property_read_bool(dev, "sd-uhs-ddr50"))
> host->caps |= MMC_CAP_UHS_DDR50;
> - if (of_property_read_bool(np, "cap-power-off-card"))
> + if (device_property_read_bool(dev, "cap-power-off-card"))
> host->caps |= MMC_CAP_POWER_OFF_CARD;
> - if (of_property_read_bool(np, "cap-mmc-hw-reset"))
> + if (device_property_read_bool(dev, "cap-mmc-hw-reset"))
> host->caps |= MMC_CAP_HW_RESET;
> - if (of_property_read_bool(np, "cap-sdio-irq"))
> + if (device_property_read_bool(dev, "cap-sdio-irq"))
> host->caps |= MMC_CAP_SDIO_IRQ;
> - if (of_property_read_bool(np, "full-pwr-cycle"))
> + if (device_property_read_bool(dev, "full-pwr-cycle"))
> host->caps2 |= MMC_CAP2_FULL_PWR_CYCLE;
> - if (of_property_read_bool(np, "keep-power-in-suspend"))
> + if (device_property_read_bool(dev, "keep-power-in-suspend"))
> host->pm_caps |= MMC_PM_KEEP_POWER;
> - if (of_property_read_bool(np, "wakeup-source") ||
> - of_property_read_bool(np, "enable-sdio-wakeup")) /* legacy */
> + if (device_property_read_bool(dev, "wakeup-source") ||
> + device_property_read_bool(dev, "enable-sdio-wakeup")) /* legacy */
> host->pm_caps |= MMC_PM_WAKE_SDIO_IRQ;
> - if (of_property_read_bool(np, "mmc-ddr-3_3v"))
> + if (device_property_read_bool(dev, "mmc-ddr-3_3v"))
> host->caps |= MMC_CAP_3_3V_DDR;
> - if (of_property_read_bool(np, "mmc-ddr-1_8v"))
> + if (device_property_read_bool(dev, "mmc-ddr-1_8v"))
> host->caps |= MMC_CAP_1_8V_DDR;
> - if (of_property_read_bool(np, "mmc-ddr-1_2v"))
> + if (device_property_read_bool(dev, "mmc-ddr-1_2v"))
> host->caps |= MMC_CAP_1_2V_DDR;
> - if (of_property_read_bool(np, "mmc-hs200-1_8v"))
> + if (device_property_read_bool(dev, "mmc-hs200-1_8v"))
> host->caps2 |= MMC_CAP2_HS200_1_8V_SDR;
> - if (of_property_read_bool(np, "mmc-hs200-1_2v"))
> + if (device_property_read_bool(dev, "mmc-hs200-1_2v"))
> host->caps2 |= MMC_CAP2_HS200_1_2V_SDR;
> - if (of_property_read_bool(np, "mmc-hs400-1_8v"))
> + if (device_property_read_bool(dev, "mmc-hs400-1_8v"))
> host->caps2 |= MMC_CAP2_HS400_1_8V | MMC_CAP2_HS200_1_8V_SDR;
> - if (of_property_read_bool(np, "mmc-hs400-1_2v"))
> + if (device_property_read_bool(dev, "mmc-hs400-1_2v"))
> host->caps2 |= MMC_CAP2_HS400_1_2V | MMC_CAP2_HS200_1_2V_SDR;
> - if (of_property_read_bool(np, "mmc-hs400-enhanced-strobe"))
> + if (device_property_read_bool(dev, "mmc-hs400-enhanced-strobe"))
> host->caps2 |= MMC_CAP2_HS400_ES;
> - if (of_property_read_bool(np, "no-sdio"))
> + if (device_property_read_bool(dev, "no-sdio"))
> host->caps2 |= MMC_CAP2_NO_SDIO;
> - if (of_property_read_bool(np, "no-sd"))
> + if (device_property_read_bool(dev, "no-sd"))
> host->caps2 |= MMC_CAP2_NO_SD;
> - if (of_property_read_bool(np, "no-mmc"))
> + if (device_property_read_bool(dev, "no-mmc"))
> host->caps2 |= MMC_CAP2_NO_MMC;
>
> - host->dsr_req = !of_property_read_u32(np, "dsr", &host->dsr);
> + host->dsr_req = !device_property_read_u32(dev, "dsr", &host->dsr);
> if (host->dsr_req && (host->dsr & ~0xffff)) {
> dev_err(host->parent,
> "device tree specified broken value for DSR: 0x%x, ignoring\n",
> diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c
> index 8718432..3728c59 100644
> --- a/drivers/mmc/host/dw_mmc.c
> +++ b/drivers/mmc/host/dw_mmc.c
> @@ -2641,8 +2641,8 @@ static int dw_mci_init_slot(struct dw_mci *host, unsigned int id)
> host->slot[id] = slot;
>
> mmc->ops = &dw_mci_ops;
> - if (of_property_read_u32_array(host->dev->of_node,
> - "clock-freq-min-max", freq, 2)) {
> + if (device_property_read_u32_array(host->dev, "clock-freq-min-max",
> + freq, 2)) {
> mmc->f_min = DW_MCI_FREQ_MIN;
> mmc->f_max = DW_MCI_FREQ_MAX;
> } else {
> @@ -2742,7 +2742,6 @@ static void dw_mci_init_dma(struct dw_mci *host)
> {
> int addr_config;
> struct device *dev = host->dev;
> - struct device_node *np = dev->of_node;
>
> /*
> * Check tansfer mode from HCON[17:16]
> @@ -2803,8 +2802,9 @@ static void dw_mci_init_dma(struct dw_mci *host)
> dev_info(host->dev, "Using internal DMA controller.\n");
> } else {
> /* TRANS_MODE_EDMAC: check dma bindings again */
> - if ((of_property_count_strings(np, "dma-names") < 0) ||
> - (!of_find_property(np, "dmas", NULL))) {
> + if ((device_property_read_string_array(dev, "dma-names",
> + NULL, 0) < 0) ||
> + !device_property_present(dev, "dmas")) {
> goto no_dma;
> }
> host->dma_ops = &dw_mci_edmac_ops;
> @@ -2964,7 +2964,6 @@ static struct dw_mci_board *dw_mci_parse_dt(struct dw_mci *host)
> {
> struct dw_mci_board *pdata;
> struct device *dev = host->dev;
> - struct device_node *np = dev->of_node;
> const struct dw_mci_drv_data *drv_data = host->drv_data;
> int ret;
> u32 clock_frequency;
> @@ -2981,20 +2980,21 @@ static struct dw_mci_board *dw_mci_parse_dt(struct dw_mci *host)
> }
>
> /* find out number of slots supported */
> - of_property_read_u32(np, "num-slots", &pdata->num_slots);
> + device_property_read_u32(dev, "num-slots", &pdata->num_slots);
>
> - if (of_property_read_u32(np, "fifo-depth", &pdata->fifo_depth))
> + if (device_property_read_u32(dev, "fifo-depth", &pdata->fifo_depth))
> dev_info(dev,
> "fifo-depth property not found, using value of FIFOTH register as default\n");
>
> - of_property_read_u32(np, "card-detect-delay", &pdata->detect_delay_ms);
> + device_property_read_u32(dev, "card-detect-delay",
> + &pdata->detect_delay_ms);
>
> - of_property_read_u32(np, "data-addr", &host->data_addr_override);
> + device_property_read_u32(dev, "data-addr", &host->data_addr_override);
>
> - if (of_get_property(np, "fifo-watermark-aligned", NULL))
> + if (device_property_present(dev, "fifo-watermark-aligned"))
> host->wm_aligned = true;
>
> - if (!of_property_read_u32(np, "clock-frequency", &clock_frequency))
> + if (!device_property_read_u32(dev, "clock-frequency", &clock_frequency))
> pdata->bus_hz = clock_frequency;
>
> if (drv_data && drv_data->parse_dt) {
> --
> 2.7.2
>
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