| Message ID | 20220318124121.26117-2-liang.yang@amlogic.com |
|---|---|
| State | Changes Requested |
| Headers | show |
| Series | refine the NFC clock framework | expand |
Hi, On 18/03/2022 13:41, Liang Yang wrote: > EMMC and NAND have the same clock control register named 'SD_EMMC_CLOCK' which is > defined in EMMC port internally. bit0~5 of 'SD_EMMC_CLOCK' is the divider and > bit6~7 is the mux for fix pll and xtal.A common MMC and NAND sub-clock has been > implemented and can be used by the eMMC and NAND controller (which are mutually > exclusive anyway). Let's use this new clock. > > Signed-off-by: Liang Yang <liang.yang@amlogic.com> > --- > drivers/mtd/nand/raw/meson_nand.c | 101 ++++++++++++++++-------------- > 1 file changed, 53 insertions(+), 48 deletions(-) > > diff --git a/drivers/mtd/nand/raw/meson_nand.c b/drivers/mtd/nand/raw/meson_nand.c > index ac3be92872d0..257ffc8a41ab 100644 > --- a/drivers/mtd/nand/raw/meson_nand.c > +++ b/drivers/mtd/nand/raw/meson_nand.c > @@ -10,6 +10,7 @@ > #include <linux/dma-mapping.h> > #include <linux/interrupt.h> > #include <linux/clk.h> > +#include <linux/clk-provider.h> > #include <linux/mtd/rawnand.h> > #include <linux/mtd/mtd.h> > #include <linux/mfd/syscon.h> > @@ -19,6 +20,7 @@ > #include <linux/iopoll.h> > #include <linux/of.h> > #include <linux/of_device.h> > +#include <linux/of_address.h> > #include <linux/sched/task_stack.h> > > #define NFC_REG_CMD 0x00 > @@ -104,6 +106,9 @@ > > #define PER_INFO_BYTE 8 > > +#define CLK_DIV_SHIFT 0 > +#define CLK_DIV_WIDTH 6 > + > struct meson_nfc_nand_chip { > struct list_head node; > struct nand_chip nand; > @@ -151,15 +156,15 @@ struct meson_nfc { > struct nand_controller controller; > struct clk *core_clk; > struct clk *device_clk; > - struct clk *phase_tx; > - struct clk *phase_rx; > + struct clk *nand_clk; > + struct clk_divider nand_divider; > > unsigned long clk_rate; > u32 bus_timing; > > struct device *dev; > void __iomem *reg_base; > - struct regmap *reg_clk; > + void __iomem *sd_emmc_clock; > struct completion completion; > struct list_head chips; > const struct meson_nfc_data *data; > @@ -235,7 +240,7 @@ static void meson_nfc_select_chip(struct nand_chip *nand, int chip) > nfc->timing.tbers_max = meson_chip->tbers_max; > > if (nfc->clk_rate != meson_chip->clk_rate) { > - ret = clk_set_rate(nfc->device_clk, meson_chip->clk_rate); > + ret = clk_set_rate(nfc->nand_clk, meson_chip->clk_rate); > if (ret) { > dev_err(nfc->dev, "failed to set clock rate\n"); > return; > @@ -406,7 +411,6 @@ static int meson_nfc_queue_rb(struct meson_nfc *nfc, int timeout_ms) > cmd = NFC_CMD_RB | NFC_CMD_RB_INT > | nfc->param.chip_select | nfc->timing.tbers_max; > writel(cmd, nfc->reg_base + NFC_REG_CMD); > - > ret = wait_for_completion_timeout(&nfc->completion, > msecs_to_jiffies(timeout_ms)); > if (ret == 0) > @@ -985,9 +989,11 @@ static const struct mtd_ooblayout_ops meson_ooblayout_ops = { > .free = meson_ooblayout_free, > }; > > +struct clk_parent_data nfc_divider_parent_data[1]; > static int meson_nfc_clk_init(struct meson_nfc *nfc) > { > int ret; > + struct clk_init_data init = {0}; > > /* request core clock */ > nfc->core_clk = devm_clk_get(nfc->dev, "core"); > @@ -1002,21 +1008,26 @@ static int meson_nfc_clk_init(struct meson_nfc *nfc) > return PTR_ERR(nfc->device_clk); > } > > - nfc->phase_tx = devm_clk_get(nfc->dev, "tx"); > - if (IS_ERR(nfc->phase_tx)) { > - dev_err(nfc->dev, "failed to get TX clk\n"); > - return PTR_ERR(nfc->phase_tx); > - } > - > - nfc->phase_rx = devm_clk_get(nfc->dev, "rx"); > - if (IS_ERR(nfc->phase_rx)) { > - dev_err(nfc->dev, "failed to get RX clk\n"); > - return PTR_ERR(nfc->phase_rx); > - } > + init.name = devm_kstrdup(nfc->dev, "nfc#div", GFP_KERNEL); > + init.ops = &clk_divider_ops; > + nfc_divider_parent_data[0].fw_name = "device"; > + init.parent_data = nfc_divider_parent_data; > + init.num_parents = 1; > + nfc->nand_divider.reg = nfc->sd_emmc_clock; > + nfc->nand_divider.shift = CLK_DIV_SHIFT; > + nfc->nand_divider.width = CLK_DIV_WIDTH; > + nfc->nand_divider.hw.init = &init; > + nfc->nand_divider.flags = CLK_DIVIDER_ONE_BASED | > + CLK_DIVIDER_ROUND_CLOSEST | > + CLK_DIVIDER_ALLOW_ZERO; > + > + nfc->nand_clk = devm_clk_register(nfc->dev, &nfc->nand_divider.hw); > + if (IS_ERR(nfc->nand_clk)) > + return PTR_ERR(nfc->nand_clk); > > /* init SD_EMMC_CLOCK to sane defaults w/min clock rate */ > - regmap_update_bits(nfc->reg_clk, > - 0, CLK_SELECT_NAND, CLK_SELECT_NAND); > + writel(CLK_SELECT_NAND | readl(nfc->sd_emmc_clock), > + nfc->sd_emmc_clock); > > ret = clk_prepare_enable(nfc->core_clk); > if (ret) { > @@ -1030,29 +1041,21 @@ static int meson_nfc_clk_init(struct meson_nfc *nfc) > goto err_device_clk; > } > > - ret = clk_prepare_enable(nfc->phase_tx); > - if (ret) { > - dev_err(nfc->dev, "failed to enable TX clock\n"); > - goto err_phase_tx; > - } > - > - ret = clk_prepare_enable(nfc->phase_rx); > + ret = clk_prepare_enable(nfc->nand_clk); > if (ret) { > - dev_err(nfc->dev, "failed to enable RX clock\n"); > - goto err_phase_rx; > + dev_err(nfc->dev, "pre enable NFC divider fail\n"); > + goto err_nand_clk; > } > > - ret = clk_set_rate(nfc->device_clk, 24000000); > + ret = clk_set_rate(nfc->nand_clk, 24000000); > if (ret) > - goto err_disable_rx; > + goto err_disable_clk; > > return 0; > > -err_disable_rx: > - clk_disable_unprepare(nfc->phase_rx); > -err_phase_rx: > - clk_disable_unprepare(nfc->phase_tx); > -err_phase_tx: > +err_disable_clk: > + clk_disable_unprepare(nfc->nand_clk); > +err_nand_clk: > clk_disable_unprepare(nfc->device_clk); > err_device_clk: > clk_disable_unprepare(nfc->core_clk); > @@ -1061,8 +1064,7 @@ static int meson_nfc_clk_init(struct meson_nfc *nfc) > > static void meson_nfc_disable_clk(struct meson_nfc *nfc) > { > - clk_disable_unprepare(nfc->phase_rx); > - clk_disable_unprepare(nfc->phase_tx); > + clk_disable_unprepare(nfc->nand_clk); > clk_disable_unprepare(nfc->device_clk); > clk_disable_unprepare(nfc->core_clk); > } > @@ -1373,9 +1375,10 @@ MODULE_DEVICE_TABLE(of, meson_nfc_id_table); > static int meson_nfc_probe(struct platform_device *pdev) > { > struct device *dev = &pdev->dev; > + struct device_node *node = dev->of_node; > struct meson_nfc *nfc; > - struct resource *res; > - int ret, irq; > + struct resource res; > + int ret, irq, i; > > nfc = devm_kzalloc(dev, sizeof(*nfc), GFP_KERNEL); > if (!nfc) > @@ -1388,21 +1391,23 @@ static int meson_nfc_probe(struct platform_device *pdev) > nand_controller_init(&nfc->controller); > INIT_LIST_HEAD(&nfc->chips); > init_completion(&nfc->completion); > - > nfc->dev = dev; > > - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); > - nfc->reg_base = devm_ioremap_resource(dev, res); > + i = of_property_match_string(node, "reg-names", "nfc"); > + if (of_address_to_resource(node, i, &res)) > + return -ENOENT; > + > + nfc->reg_base = devm_ioremap_resource(dev, &res); > if (IS_ERR(nfc->reg_base)) > return PTR_ERR(nfc->reg_base); You can use devm_platform_ioremap_resource_byname() here which is musch simpler, and permits dropping platform_get_resource() at the same time. > > - nfc->reg_clk = > - syscon_regmap_lookup_by_phandle(dev->of_node, > - "amlogic,mmc-syscon"); > - if (IS_ERR(nfc->reg_clk)) { > - dev_err(dev, "Failed to lookup clock base\n"); > - return PTR_ERR(nfc->reg_clk); > - } > + i = of_property_match_string(node, "reg-names", "emmc"); > + if (of_address_to_resource(node, i, &res)) > + return -ENOENT; > + > + nfc->sd_emmc_clock = devm_ioremap_resource(dev, &res); > + if (IS_ERR(nfc->sd_emmc_clock)) > + return PTR_ERR(nfc->sd_emmc_clock); Same here. > > irq = platform_get_irq(pdev, 0); > if (irq < 0) Thanks ! Neil
Hi Neil, On 2022/3/18 22:02, Neil Armstrong wrote: > [ EXTERNAL EMAIL ] > > Hi, > > On 18/03/2022 13:41, Liang Yang wrote: >> EMMC and NAND have the same clock control register named >> 'SD_EMMC_CLOCK' which is >> defined in EMMC port internally. bit0~5 of 'SD_EMMC_CLOCK' is the >> divider and >> bit6~7 is the mux for fix pll and xtal.A common MMC and NAND sub-clock >> has been >> implemented and can be used by the eMMC and NAND controller (which are >> mutually >> exclusive anyway). Let's use this new clock. >> >> Signed-off-by: Liang Yang <liang.yang@amlogic.com> >> --- >> drivers/mtd/nand/raw/meson_nand.c | 101 ++++++++++++++++-------------- >> 1 file changed, 53 insertions(+), 48 deletions(-) >> >> diff --git a/drivers/mtd/nand/raw/meson_nand.c >> b/drivers/mtd/nand/raw/meson_nand.c >> index ac3be92872d0..257ffc8a41ab 100644 >> --- a/drivers/mtd/nand/raw/meson_nand.c >> +++ b/drivers/mtd/nand/raw/meson_nand.c >> @@ -10,6 +10,7 @@ >> #include <linux/dma-mapping.h> >> #include <linux/interrupt.h> >> #include <linux/clk.h> >> +#include <linux/clk-provider.h> >> #include <linux/mtd/rawnand.h> >> #include <linux/mtd/mtd.h> >> #include <linux/mfd/syscon.h> >> @@ -19,6 +20,7 @@ >> #include <linux/iopoll.h> >> #include <linux/of.h> >> #include <linux/of_device.h> >> +#include <linux/of_address.h> >> #include <linux/sched/task_stack.h> >> #define NFC_REG_CMD 0x00 >> @@ -104,6 +106,9 @@ >> #define PER_INFO_BYTE 8 >> +#define CLK_DIV_SHIFT 0 >> +#define CLK_DIV_WIDTH 6 >> + >> struct meson_nfc_nand_chip { >> struct list_head node; >> struct nand_chip nand; >> @@ -151,15 +156,15 @@ struct meson_nfc { >> struct nand_controller controller; >> struct clk *core_clk; >> struct clk *device_clk; >> - struct clk *phase_tx; >> - struct clk *phase_rx; >> + struct clk *nand_clk; >> + struct clk_divider nand_divider; >> unsigned long clk_rate; >> u32 bus_timing; >> struct device *dev; >> void __iomem *reg_base; >> - struct regmap *reg_clk; >> + void __iomem *sd_emmc_clock; >> struct completion completion; >> struct list_head chips; >> const struct meson_nfc_data *data; >> @@ -235,7 +240,7 @@ static void meson_nfc_select_chip(struct nand_chip >> *nand, int chip) >> nfc->timing.tbers_max = meson_chip->tbers_max; >> if (nfc->clk_rate != meson_chip->clk_rate) { >> - ret = clk_set_rate(nfc->device_clk, meson_chip->clk_rate); >> + ret = clk_set_rate(nfc->nand_clk, meson_chip->clk_rate); >> if (ret) { >> dev_err(nfc->dev, "failed to set clock rate\n"); >> return; >> @@ -406,7 +411,6 @@ static int meson_nfc_queue_rb(struct meson_nfc >> *nfc, int timeout_ms) >> cmd = NFC_CMD_RB | NFC_CMD_RB_INT >> | nfc->param.chip_select | nfc->timing.tbers_max; >> writel(cmd, nfc->reg_base + NFC_REG_CMD); >> - >> ret = wait_for_completion_timeout(&nfc->completion, >> msecs_to_jiffies(timeout_ms)); >> if (ret == 0) >> @@ -985,9 +989,11 @@ static const struct mtd_ooblayout_ops >> meson_ooblayout_ops = { >> .free = meson_ooblayout_free, >> }; >> +struct clk_parent_data nfc_divider_parent_data[1]; >> static int meson_nfc_clk_init(struct meson_nfc *nfc) >> { >> int ret; >> + struct clk_init_data init = {0}; >> /* request core clock */ >> nfc->core_clk = devm_clk_get(nfc->dev, "core"); >> @@ -1002,21 +1008,26 @@ static int meson_nfc_clk_init(struct meson_nfc >> *nfc) >> return PTR_ERR(nfc->device_clk); >> } >> - nfc->phase_tx = devm_clk_get(nfc->dev, "tx"); >> - if (IS_ERR(nfc->phase_tx)) { >> - dev_err(nfc->dev, "failed to get TX clk\n"); >> - return PTR_ERR(nfc->phase_tx); >> - } >> - >> - nfc->phase_rx = devm_clk_get(nfc->dev, "rx"); >> - if (IS_ERR(nfc->phase_rx)) { >> - dev_err(nfc->dev, "failed to get RX clk\n"); >> - return PTR_ERR(nfc->phase_rx); >> - } >> + init.name = devm_kstrdup(nfc->dev, "nfc#div", GFP_KERNEL); >> + init.ops = &clk_divider_ops; >> + nfc_divider_parent_data[0].fw_name = "device"; >> + init.parent_data = nfc_divider_parent_data; >> + init.num_parents = 1; >> + nfc->nand_divider.reg = nfc->sd_emmc_clock; >> + nfc->nand_divider.shift = CLK_DIV_SHIFT; >> + nfc->nand_divider.width = CLK_DIV_WIDTH; >> + nfc->nand_divider.hw.init = &init; >> + nfc->nand_divider.flags = CLK_DIVIDER_ONE_BASED | >> + CLK_DIVIDER_ROUND_CLOSEST | >> + CLK_DIVIDER_ALLOW_ZERO; >> + >> + nfc->nand_clk = devm_clk_register(nfc->dev, &nfc->nand_divider.hw); >> + if (IS_ERR(nfc->nand_clk)) >> + return PTR_ERR(nfc->nand_clk); >> /* init SD_EMMC_CLOCK to sane defaults w/min clock rate */ >> - regmap_update_bits(nfc->reg_clk, >> - 0, CLK_SELECT_NAND, CLK_SELECT_NAND); >> + writel(CLK_SELECT_NAND | readl(nfc->sd_emmc_clock), >> + nfc->sd_emmc_clock); >> ret = clk_prepare_enable(nfc->core_clk); >> if (ret) { >> @@ -1030,29 +1041,21 @@ static int meson_nfc_clk_init(struct meson_nfc >> *nfc) >> goto err_device_clk; >> } >> - ret = clk_prepare_enable(nfc->phase_tx); >> - if (ret) { >> - dev_err(nfc->dev, "failed to enable TX clock\n"); >> - goto err_phase_tx; >> - } >> - >> - ret = clk_prepare_enable(nfc->phase_rx); >> + ret = clk_prepare_enable(nfc->nand_clk); >> if (ret) { >> - dev_err(nfc->dev, "failed to enable RX clock\n"); >> - goto err_phase_rx; >> + dev_err(nfc->dev, "pre enable NFC divider fail\n"); >> + goto err_nand_clk; >> } >> - ret = clk_set_rate(nfc->device_clk, 24000000); >> + ret = clk_set_rate(nfc->nand_clk, 24000000); >> if (ret) >> - goto err_disable_rx; >> + goto err_disable_clk; >> return 0; >> -err_disable_rx: >> - clk_disable_unprepare(nfc->phase_rx); >> -err_phase_rx: >> - clk_disable_unprepare(nfc->phase_tx); >> -err_phase_tx: >> +err_disable_clk: >> + clk_disable_unprepare(nfc->nand_clk); >> +err_nand_clk: >> clk_disable_unprepare(nfc->device_clk); >> err_device_clk: >> clk_disable_unprepare(nfc->core_clk); >> @@ -1061,8 +1064,7 @@ static int meson_nfc_clk_init(struct meson_nfc >> *nfc) >> static void meson_nfc_disable_clk(struct meson_nfc *nfc) >> { >> - clk_disable_unprepare(nfc->phase_rx); >> - clk_disable_unprepare(nfc->phase_tx); >> + clk_disable_unprepare(nfc->nand_clk); >> clk_disable_unprepare(nfc->device_clk); >> clk_disable_unprepare(nfc->core_clk); >> } >> @@ -1373,9 +1375,10 @@ MODULE_DEVICE_TABLE(of, meson_nfc_id_table); >> static int meson_nfc_probe(struct platform_device *pdev) >> { >> struct device *dev = &pdev->dev; >> + struct device_node *node = dev->of_node; >> struct meson_nfc *nfc; >> - struct resource *res; >> - int ret, irq; >> + struct resource res; >> + int ret, irq, i; >> nfc = devm_kzalloc(dev, sizeof(*nfc), GFP_KERNEL); >> if (!nfc) >> @@ -1388,21 +1391,23 @@ static int meson_nfc_probe(struct >> platform_device *pdev) >> nand_controller_init(&nfc->controller); >> INIT_LIST_HEAD(&nfc->chips); >> init_completion(&nfc->completion); >> - >> nfc->dev = dev; >> - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); >> - nfc->reg_base = devm_ioremap_resource(dev, res); >> + i = of_property_match_string(node, "reg-names", "nfc"); >> + if (of_address_to_resource(node, i, &res)) >> + return -ENOENT; >> + >> + nfc->reg_base = devm_ioremap_resource(dev, &res); >> if (IS_ERR(nfc->reg_base)) >> return PTR_ERR(nfc->reg_base); > > You can use devm_platform_ioremap_resource_byname() here which is musch > simpler, > and permits dropping platform_get_resource() at the same time. ok, i will do it. > >> - nfc->reg_clk = >> - syscon_regmap_lookup_by_phandle(dev->of_node, >> - "amlogic,mmc-syscon"); >> - if (IS_ERR(nfc->reg_clk)) { >> - dev_err(dev, "Failed to lookup clock base\n"); >> - return PTR_ERR(nfc->reg_clk); >> - } >> + i = of_property_match_string(node, "reg-names", "emmc"); >> + if (of_address_to_resource(node, i, &res)) >> + return -ENOENT; >> + >> + nfc->sd_emmc_clock = devm_ioremap_resource(dev, &res); >> + if (IS_ERR(nfc->sd_emmc_clock)) >> + return PTR_ERR(nfc->sd_emmc_clock); > > Same here. ok. thanks. > >> irq = platform_get_irq(pdev, 0); >> if (irq < 0) > > Thanks ! > Neil > > .
Hi Liang,
I love your patch! Yet something to improve:
[auto build test ERROR on mtd/nand/next]
[also build test ERROR on mtd/mtd/next mtd/mtd/fixes robh/for-next v5.17 next-20220318]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]
url: https://github.com/0day-ci/linux/commits/Liang-Yang/refine-the-NFC-clock-framework/20220318-204307
base: https://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux.git nand/next
config: m68k-randconfig-r015-20220320 (https://download.01.org/0day-ci/archive/20220321/202203211339.6SuyU3aA-lkp@intel.com/config)
compiler: m68k-linux-gcc (GCC) 11.2.0
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# https://github.com/0day-ci/linux/commit/8722c778a1a81891f7362662caf9d166442d5990
git remote add linux-review https://github.com/0day-ci/linux
git fetch --no-tags linux-review Liang-Yang/refine-the-NFC-clock-framework/20220318-204307
git checkout 8722c778a1a81891f7362662caf9d166442d5990
# save the config file to linux build tree
mkdir build_dir
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=m68k SHELL=/bin/bash
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>
All errors (new ones prefixed by >>):
m68k-linux-ld: drivers/mtd/nand/raw/meson_nand.o: in function `meson_nfc_probe':
>> meson_nand.c:(.text+0xaae): undefined reference to `clk_divider_ops'
>> m68k-linux-ld: meson_nand.c:(.text+0xaf0): undefined reference to `devm_clk_register'
diff --git a/drivers/mtd/nand/raw/meson_nand.c b/drivers/mtd/nand/raw/meson_nand.c index ac3be92872d0..257ffc8a41ab 100644 --- a/drivers/mtd/nand/raw/meson_nand.c +++ b/drivers/mtd/nand/raw/meson_nand.c @@ -10,6 +10,7 @@ #include <linux/dma-mapping.h> #include <linux/interrupt.h> #include <linux/clk.h> +#include <linux/clk-provider.h> #include <linux/mtd/rawnand.h> #include <linux/mtd/mtd.h> #include <linux/mfd/syscon.h> @@ -19,6 +20,7 @@ #include <linux/iopoll.h> #include <linux/of.h> #include <linux/of_device.h> +#include <linux/of_address.h> #include <linux/sched/task_stack.h> #define NFC_REG_CMD 0x00 @@ -104,6 +106,9 @@ #define PER_INFO_BYTE 8 +#define CLK_DIV_SHIFT 0 +#define CLK_DIV_WIDTH 6 + struct meson_nfc_nand_chip { struct list_head node; struct nand_chip nand; @@ -151,15 +156,15 @@ struct meson_nfc { struct nand_controller controller; struct clk *core_clk; struct clk *device_clk; - struct clk *phase_tx; - struct clk *phase_rx; + struct clk *nand_clk; + struct clk_divider nand_divider; unsigned long clk_rate; u32 bus_timing; struct device *dev; void __iomem *reg_base; - struct regmap *reg_clk; + void __iomem *sd_emmc_clock; struct completion completion; struct list_head chips; const struct meson_nfc_data *data; @@ -235,7 +240,7 @@ static void meson_nfc_select_chip(struct nand_chip *nand, int chip) nfc->timing.tbers_max = meson_chip->tbers_max; if (nfc->clk_rate != meson_chip->clk_rate) { - ret = clk_set_rate(nfc->device_clk, meson_chip->clk_rate); + ret = clk_set_rate(nfc->nand_clk, meson_chip->clk_rate); if (ret) { dev_err(nfc->dev, "failed to set clock rate\n"); return; @@ -406,7 +411,6 @@ static int meson_nfc_queue_rb(struct meson_nfc *nfc, int timeout_ms) cmd = NFC_CMD_RB | NFC_CMD_RB_INT | nfc->param.chip_select | nfc->timing.tbers_max; writel(cmd, nfc->reg_base + NFC_REG_CMD); - ret = wait_for_completion_timeout(&nfc->completion, msecs_to_jiffies(timeout_ms)); if (ret == 0) @@ -985,9 +989,11 @@ static const struct mtd_ooblayout_ops meson_ooblayout_ops = { .free = meson_ooblayout_free, }; +struct clk_parent_data nfc_divider_parent_data[1]; static int meson_nfc_clk_init(struct meson_nfc *nfc) { int ret; + struct clk_init_data init = {0}; /* request core clock */ nfc->core_clk = devm_clk_get(nfc->dev, "core"); @@ -1002,21 +1008,26 @@ static int meson_nfc_clk_init(struct meson_nfc *nfc) return PTR_ERR(nfc->device_clk); } - nfc->phase_tx = devm_clk_get(nfc->dev, "tx"); - if (IS_ERR(nfc->phase_tx)) { - dev_err(nfc->dev, "failed to get TX clk\n"); - return PTR_ERR(nfc->phase_tx); - } - - nfc->phase_rx = devm_clk_get(nfc->dev, "rx"); - if (IS_ERR(nfc->phase_rx)) { - dev_err(nfc->dev, "failed to get RX clk\n"); - return PTR_ERR(nfc->phase_rx); - } + init.name = devm_kstrdup(nfc->dev, "nfc#div", GFP_KERNEL); + init.ops = &clk_divider_ops; + nfc_divider_parent_data[0].fw_name = "device"; + init.parent_data = nfc_divider_parent_data; + init.num_parents = 1; + nfc->nand_divider.reg = nfc->sd_emmc_clock; + nfc->nand_divider.shift = CLK_DIV_SHIFT; + nfc->nand_divider.width = CLK_DIV_WIDTH; + nfc->nand_divider.hw.init = &init; + nfc->nand_divider.flags = CLK_DIVIDER_ONE_BASED | + CLK_DIVIDER_ROUND_CLOSEST | + CLK_DIVIDER_ALLOW_ZERO; + + nfc->nand_clk = devm_clk_register(nfc->dev, &nfc->nand_divider.hw); + if (IS_ERR(nfc->nand_clk)) + return PTR_ERR(nfc->nand_clk); /* init SD_EMMC_CLOCK to sane defaults w/min clock rate */ - regmap_update_bits(nfc->reg_clk, - 0, CLK_SELECT_NAND, CLK_SELECT_NAND); + writel(CLK_SELECT_NAND | readl(nfc->sd_emmc_clock), + nfc->sd_emmc_clock); ret = clk_prepare_enable(nfc->core_clk); if (ret) { @@ -1030,29 +1041,21 @@ static int meson_nfc_clk_init(struct meson_nfc *nfc) goto err_device_clk; } - ret = clk_prepare_enable(nfc->phase_tx); - if (ret) { - dev_err(nfc->dev, "failed to enable TX clock\n"); - goto err_phase_tx; - } - - ret = clk_prepare_enable(nfc->phase_rx); + ret = clk_prepare_enable(nfc->nand_clk); if (ret) { - dev_err(nfc->dev, "failed to enable RX clock\n"); - goto err_phase_rx; + dev_err(nfc->dev, "pre enable NFC divider fail\n"); + goto err_nand_clk; } - ret = clk_set_rate(nfc->device_clk, 24000000); + ret = clk_set_rate(nfc->nand_clk, 24000000); if (ret) - goto err_disable_rx; + goto err_disable_clk; return 0; -err_disable_rx: - clk_disable_unprepare(nfc->phase_rx); -err_phase_rx: - clk_disable_unprepare(nfc->phase_tx); -err_phase_tx: +err_disable_clk: + clk_disable_unprepare(nfc->nand_clk); +err_nand_clk: clk_disable_unprepare(nfc->device_clk); err_device_clk: clk_disable_unprepare(nfc->core_clk); @@ -1061,8 +1064,7 @@ static int meson_nfc_clk_init(struct meson_nfc *nfc) static void meson_nfc_disable_clk(struct meson_nfc *nfc) { - clk_disable_unprepare(nfc->phase_rx); - clk_disable_unprepare(nfc->phase_tx); + clk_disable_unprepare(nfc->nand_clk); clk_disable_unprepare(nfc->device_clk); clk_disable_unprepare(nfc->core_clk); } @@ -1373,9 +1375,10 @@ MODULE_DEVICE_TABLE(of, meson_nfc_id_table); static int meson_nfc_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; + struct device_node *node = dev->of_node; struct meson_nfc *nfc; - struct resource *res; - int ret, irq; + struct resource res; + int ret, irq, i; nfc = devm_kzalloc(dev, sizeof(*nfc), GFP_KERNEL); if (!nfc) @@ -1388,21 +1391,23 @@ static int meson_nfc_probe(struct platform_device *pdev) nand_controller_init(&nfc->controller); INIT_LIST_HEAD(&nfc->chips); init_completion(&nfc->completion); - nfc->dev = dev; - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - nfc->reg_base = devm_ioremap_resource(dev, res); + i = of_property_match_string(node, "reg-names", "nfc"); + if (of_address_to_resource(node, i, &res)) + return -ENOENT; + + nfc->reg_base = devm_ioremap_resource(dev, &res); if (IS_ERR(nfc->reg_base)) return PTR_ERR(nfc->reg_base); - nfc->reg_clk = - syscon_regmap_lookup_by_phandle(dev->of_node, - "amlogic,mmc-syscon"); - if (IS_ERR(nfc->reg_clk)) { - dev_err(dev, "Failed to lookup clock base\n"); - return PTR_ERR(nfc->reg_clk); - } + i = of_property_match_string(node, "reg-names", "emmc"); + if (of_address_to_resource(node, i, &res)) + return -ENOENT; + + nfc->sd_emmc_clock = devm_ioremap_resource(dev, &res); + if (IS_ERR(nfc->sd_emmc_clock)) + return PTR_ERR(nfc->sd_emmc_clock); irq = platform_get_irq(pdev, 0); if (irq < 0)
EMMC and NAND have the same clock control register named 'SD_EMMC_CLOCK' which is defined in EMMC port internally. bit0~5 of 'SD_EMMC_CLOCK' is the divider and bit6~7 is the mux for fix pll and xtal.A common MMC and NAND sub-clock has been implemented and can be used by the eMMC and NAND controller (which are mutually exclusive anyway). Let's use this new clock. Signed-off-by: Liang Yang <liang.yang@amlogic.com> --- drivers/mtd/nand/raw/meson_nand.c | 101 ++++++++++++++++-------------- 1 file changed, 53 insertions(+), 48 deletions(-)