From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mail-pg0-x241.google.com ([2607:f8b0:400e:c05::241]) by bombadil.infradead.org with esmtps (Exim 4.87 #1 (Red Hat Linux)) id 1cl1Wk-0007b9-AD for barebox@lists.infradead.org; Mon, 06 Mar 2017 22:54:55 +0000 Received: by mail-pg0-x241.google.com with SMTP id 187so7289792pgb.2 for ; Mon, 06 Mar 2017 14:54:31 -0800 (PST) From: Andrey Smirnov Date: Mon, 6 Mar 2017 14:53:32 -0800 Message-Id: <20170306225356.31475-22-andrew.smirnov@gmail.com> In-Reply-To: <20170306225356.31475-1-andrew.smirnov@gmail.com> References: <20170306225356.31475-1-andrew.smirnov@gmail.com> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "barebox" Errors-To: barebox-bounces+u.kleine-koenig=pengutronix.de@lists.infradead.org Subject: [PATCH 21/45] mci: atmel_mci: Add DT support To: barebox@lists.infradead.org Cc: Andrey Smirnov Signed-off-by: Andrey Smirnov --- drivers/mci/atmel_mci.c | 101 +++++++++++++++++++++++++++++++++--------------- 1 file changed, 70 insertions(+), 31 deletions(-) diff --git a/drivers/mci/atmel_mci.c b/drivers/mci/atmel_mci.c index 2a0ddb0..317cf46 100644 --- a/drivers/mci/atmel_mci.c +++ b/drivers/mci/atmel_mci.c @@ -24,6 +24,7 @@ #include #include #include +#include #include "atmel-mci-regs.h" @@ -53,6 +54,7 @@ struct atmel_mci { u32 cfg_reg; u32 sdc_reg; bool need_reset; + int detect_pin; }; #define to_mci_host(mci) container_of(mci, struct atmel_mci, mci) @@ -360,14 +362,13 @@ static int atmci_start_cmd(struct atmel_mci *host, struct mci_cmd *cmd, static int atmci_card_present(struct mci_host *mci) { struct atmel_mci *host = to_mci_host(mci); - struct atmel_mci_platform_data *pd = host->hw_dev->platform_data; int ret; /* No gpio, assume card is present */ - if (!gpio_is_valid(pd->detect_pin)) + if (!gpio_is_valid(host->detect_pin)) return 1; - ret = gpio_get_value(pd->detect_pin); + ret = gpio_get_value(host->detect_pin); return ret == 0 ? 1 : 0; } @@ -535,44 +536,71 @@ static int atmci_probe(struct device_d *hw_dev) { struct resource *iores; struct atmel_mci *host; + struct device_node *np = hw_dev->device_node; struct atmel_mci_platform_data *pd = hw_dev->platform_data; int ret; - if (!pd) { - dev_err(hw_dev, "missing platform data\n"); - return -EINVAL; + host = xzalloc(sizeof(*host)); + host->mci.send_cmd = atmci_request; + host->mci.set_ios = atmci_set_ios; + host->mci.init = atmci_reset; + host->mci.card_present = atmci_card_present; + host->mci.hw_dev = hw_dev; + host->detect_pin = -EINVAL; + + if (pd) { + host->detect_pin = pd->detect_pin; + host->mci.devname = pd->devname; + + if (pd->bus_width >= 4) + host->mci.host_caps |= MMC_CAP_4_BIT_DATA; + if (pd->bus_width == 8) + host->mci.host_caps |= MMC_CAP_8_BIT_DATA; + + host->slot_b = pd->slot_b; + } else if (np) { + u32 slot_id; + struct device_node *cnp; + const char *alias = of_alias_get(np); + + if (alias) + host->mci.devname = xstrdup(alias); + + host->detect_pin = of_get_named_gpio(np, "cd-gpios", 0); + + for_each_child_of_node(np, cnp) { + if (of_property_read_u32(cnp, "reg", &slot_id)) { + dev_warn(hw_dev, "reg property is missing for %s\n", + cnp->full_name); + continue; + } + + host->slot_b = slot_id; + mci_of_parse_node(&host->mci, cnp); + break; + } + } else { + dev_err(hw_dev, "Missing device information\n"); + ret = -EINVAL; + goto error_out; } - if (gpio_is_valid(pd->detect_pin)) { - ret = gpio_request(pd->detect_pin, "mci_cd"); + if (gpio_is_valid(host->detect_pin)) { + ret = gpio_request(host->detect_pin, "mci_cd"); if (ret) { dev_err(hw_dev, "Impossible to request CD gpio %d (%d)\n", - ret, pd->detect_pin); - return ret; + ret, host->detect_pin); + goto error_out; } - ret = gpio_direction_input(pd->detect_pin); + ret = gpio_direction_input(host->detect_pin); if (ret) { dev_err(hw_dev, "Impossible to configure CD gpio %d as input (%d)\n", - ret, pd->detect_pin); - goto err_gpio_cd_request; + ret, host->detect_pin); + goto error_out; } } - host = xzalloc(sizeof(*host)); - host->mci.send_cmd = atmci_request; - host->mci.set_ios = atmci_set_ios; - host->mci.init = atmci_reset; - host->mci.card_present = atmci_card_present; - host->mci.hw_dev = hw_dev; - host->mci.devname = pd->devname; - - if (pd->bus_width >= 4) - host->mci.host_caps |= MMC_CAP_4_BIT_DATA; - if (pd->bus_width == 8) - host->mci.host_caps |= MMC_CAP_8_BIT_DATA; - host->slot_b = pd->slot_b; - iores = dev_request_mem_resource(hw_dev, 0); if (IS_ERR(iores)) return PTR_ERR(iores); @@ -583,7 +611,7 @@ static int atmci_probe(struct device_d *hw_dev) if (IS_ERR(host->clk)) { dev_err(hw_dev, "no mci_clk\n"); ret = PTR_ERR(host->clk); - goto err_gpio_cd_request; + goto error_out; } clk_enable(host->clk); @@ -614,15 +642,26 @@ static int atmci_probe(struct device_d *hw_dev) return 0; -err_gpio_cd_request: - if (gpio_is_valid(pd->detect_pin)) - gpio_free(pd->detect_pin); +error_out: + free(host); + + if (gpio_is_valid(host->detect_pin)) + gpio_free(host->detect_pin); return ret; } +static __maybe_unused struct of_device_id atmci_compatible[] = { + { + .compatible = "atmel,hsmci", + }, { + /* sentinel */ + } +}; + static struct driver_d atmci_driver = { .name = "atmel_mci", .probe = atmci_probe, + .of_compatible = DRV_OF_COMPAT(atmci_compatible), }; device_platform_driver(atmci_driver); -- 2.9.3 _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox