From 036f29d554e84fa288411d950c2f0ae797be9146 Mon Sep 17 00:00:00 2001 From: Zhangfei Gao Date: Thu, 9 Jan 2014 22:35:11 +0800 Subject: mmc: dw_mmc: add dw_mmc-k3 for k3 platform Add dw_mmc-k3.c for k3v2, support sd/emmc Signed-off-by: Zhangfei Gao Signed-off-by: Zhigang Wang Acked-by: Arnd Bergmann Signed-off-by: Chris Ball --- .../devicetree/bindings/mmc/k3-dw-mshc.txt | 60 ++++++++++++++++++++++ 1 file changed, 60 insertions(+) create mode 100644 Documentation/devicetree/bindings/mmc/k3-dw-mshc.txt (limited to 'Documentation/devicetree/bindings/mmc/k3-dw-mshc.txt') diff --git a/Documentation/devicetree/bindings/mmc/k3-dw-mshc.txt b/Documentation/devicetree/bindings/mmc/k3-dw-mshc.txt new file mode 100644 index 00000000000..d7e2d7f159b --- /dev/null +++ b/Documentation/devicetree/bindings/mmc/k3-dw-mshc.txt @@ -0,0 +1,60 @@ +* Hisilicon specific extensions to the Synopsys Designware Mobile + Storage Host Controller + +Read synopsys-dw-mshc.txt for more details + +The Synopsys designware mobile storage host controller is used to interface +a SoC with storage medium such as eMMC or SD/MMC cards. This file documents +differences between the core Synopsys dw mshc controller properties described +by synopsys-dw-mshc.txt and the properties used by the Hisilicon specific +extensions to the Synopsys Designware Mobile Storage Host Controller. + +Required Properties: + +* compatible: should be one of the following. + - "hisilicon,hi4511-dw-mshc": for controllers with hi4511 specific extentions. + +* clock-freq-table: should be the frequency (in Hz) array of the ciu clock + in each supported mode. + 0. CIU clock rate in Hz for DS mode + 1. CIU clock rate in Hz for MMC HS mode + 2. CIU clock rate in Hz for SD HS mode + 3. CIU clock rate in Hz for SDR12 mode + 4. CIU clock rate in Hz for SDR25 mode + 5. CIU clock rate in Hz for SDR50 mode + 6. CIU clock rate in Hz for SDR104 mode + 7. CIU clock rate in Hz for DDR50 mode + 8. CIU clock rate in Hz for HS200 mode + +Example: + + /* for Hi3620 */ + + /* SoC portion */ + dwmmc_0: dwmmc0@fcd03000 { + compatible = "hisilicon,hi4511-dw-mshc"; + reg = <0xfcd03000 0x1000>; + interrupts = <0 16 4>; + #address-cells = <1>; + #size-cells = <0>; + clocks = <&mmc_clock HI3620_SD_CIUCLK>, <&clock HI3620_DDRC_PER_CLK>; + clock-names = "ciu", "biu"; + clock-freq-table = + <25000000 0 50000000 25000000 50000000 100000000 0 50000000>; + }; + + /* Board portion */ + dwmmc0@fcd03000 { + num-slots = <1>; + vmmc-supply = <&ldo12>; + fifo-depth = <0x100>; + supports-highspeed; + pinctrl-names = "default"; + pinctrl-0 = <&sd_pmx_pins &sd_cfg_func1 &sd_cfg_func2>; + slot@0 { + reg = <0>; + bus-width = <4>; + disable-wp; + cd-gpios = <&gpio10 3 0>; + }; + }; -- cgit v1.2.3-70-g09d2 From 0e662440e9658163128b71a925dbf6a30d4db625 Mon Sep 17 00:00:00 2001 From: Zhangfei Gao Date: Mon, 13 Jan 2014 17:14:29 +0800 Subject: mmc: dw_mmc: k3: remove clk_table Remove clk_table and directly use ios->clock as clock source rate. Abstract init clock rate and max clock limitation in clk.c Signed-off-by: Zhangfei Gao Acked-by: Seungwon Jeon Signed-off-by: Chris Ball --- .../devicetree/bindings/mmc/k3-dw-mshc.txt | 14 -------- drivers/mmc/host/dw_mmc-k3.c | 41 ++-------------------- 2 files changed, 2 insertions(+), 53 deletions(-) (limited to 'Documentation/devicetree/bindings/mmc/k3-dw-mshc.txt') diff --git a/Documentation/devicetree/bindings/mmc/k3-dw-mshc.txt b/Documentation/devicetree/bindings/mmc/k3-dw-mshc.txt index d7e2d7f159b..b8653ea9795 100644 --- a/Documentation/devicetree/bindings/mmc/k3-dw-mshc.txt +++ b/Documentation/devicetree/bindings/mmc/k3-dw-mshc.txt @@ -14,18 +14,6 @@ Required Properties: * compatible: should be one of the following. - "hisilicon,hi4511-dw-mshc": for controllers with hi4511 specific extentions. -* clock-freq-table: should be the frequency (in Hz) array of the ciu clock - in each supported mode. - 0. CIU clock rate in Hz for DS mode - 1. CIU clock rate in Hz for MMC HS mode - 2. CIU clock rate in Hz for SD HS mode - 3. CIU clock rate in Hz for SDR12 mode - 4. CIU clock rate in Hz for SDR25 mode - 5. CIU clock rate in Hz for SDR50 mode - 6. CIU clock rate in Hz for SDR104 mode - 7. CIU clock rate in Hz for DDR50 mode - 8. CIU clock rate in Hz for HS200 mode - Example: /* for Hi3620 */ @@ -39,8 +27,6 @@ Example: #size-cells = <0>; clocks = <&mmc_clock HI3620_SD_CIUCLK>, <&clock HI3620_DDRC_PER_CLK>; clock-names = "ciu", "biu"; - clock-freq-table = - <25000000 0 50000000 25000000 50000000 100000000 0 50000000>; }; /* Board portion */ diff --git a/drivers/mmc/host/dw_mmc-k3.c b/drivers/mmc/host/dw_mmc-k3.c index 3542a03e9f9..f567c219cff 100644 --- a/drivers/mmc/host/dw_mmc-k3.c +++ b/drivers/mmc/host/dw_mmc-k3.c @@ -18,56 +18,19 @@ #include "dw_mmc.h" #include "dw_mmc-pltfm.h" -#define MAX_NUMS 10 -struct dw_mci_k3_priv_data { - u32 clk_table[MAX_NUMS]; -}; - static void dw_mci_k3_set_ios(struct dw_mci *host, struct mmc_ios *ios) { - struct dw_mci_k3_priv_data *priv = host->priv; - u32 rate = priv->clk_table[ios->timing]; int ret; - if (!rate) { - dev_warn(host->dev, - "no specified rate in timing %u\n", ios->timing); - return; - } - - ret = clk_set_rate(host->ciu_clk, rate); + ret = clk_set_rate(host->ciu_clk, ios->clock); if (ret) - dev_warn(host->dev, "failed to set clock rate %uHz\n", rate); + dev_warn(host->dev, "failed to set rate %uHz\n", ios->clock); host->bus_hz = clk_get_rate(host->ciu_clk); } -static int dw_mci_k3_parse_dt(struct dw_mci *host) -{ - struct dw_mci_k3_priv_data *priv; - struct device_node *node = host->dev->of_node; - struct property *prop; - const __be32 *cur; - u32 val, num = 0; - - priv = devm_kzalloc(host->dev, sizeof(*priv), GFP_KERNEL); - if (!priv) { - dev_err(host->dev, "mem alloc failed for private data\n"); - return -ENOMEM; - } - host->priv = priv; - - of_property_for_each_u32(node, "clock-freq-table", prop, cur, val) { - if (num >= MAX_NUMS) - break; - priv->clk_table[num++] = val; - } - return 0; -} - static const struct dw_mci_drv_data k3_drv_data = { .set_ios = dw_mci_k3_set_ios, - .parse_dt = dw_mci_k3_parse_dt, }; static const struct of_device_id dw_mci_k3_match[] = { -- cgit v1.2.3-70-g09d2